/* ── CSS Custom Properties ── */
:root {
    --color-primary: #00d992;
    --color-primary-hover: #00c080;
    --color-primary-rgb: 0, 217, 146;
    --color-primary-muted: rgba(0, 217, 146, 0.12);
    --color-accent: #00b8ff;
    --color-secondary: #0a0a1a;
    --color-ink: #1a1a2e;
    --color-body: #4a4a5a;
    --color-mute: #8888a0;
    --color-subtle: #e8e8f0;
    --color-hairline: rgba(0, 0, 0, 0.08);
    --color-bg: #ffffff;
    --color-surface: #f7f7fc;
    --color-canvas: #ffffff;
    --color-elevated: #ffffff;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    --color-success: #00d992;

    --nav-height: 84px;
    --nav-blur: 12px;
    --container-width: 1200px;
    --rounded-xs: 8px;
    --rounded-sm: 12px;
    --rounded-md: 16px;
    --rounded-lg: 24px;
    --rounded-xl: 32px;
    --rounded-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.15);

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    --spacing-5xl: 100px;
    --spacing-6xl: 120px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

.dark-mode {
    --color-primary: #00d992;
    --color-primary-hover: #00e89e;
    --color-primary-muted: rgba(0, 217, 146, 0.08);
    --color-accent: #4dc9f6;
    --color-secondary: #f0f0f5;
    --color-ink: #ededf5;
    --color-body: #a0a0b8;
    --color-mute: #6b6b80;
    --color-subtle: #2a2a3e;
    --color-hairline: rgba(255, 255, 255, 0.08);
    --color-bg: #0f0f23;
    --color-surface: #181830;
    --color-canvas: #0f0f23;
    --color-elevated: #1e1e3a;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.5);
}

/* ── Reset ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 18px;
    line-height: 1.6;
    color: var(--color-body);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    font-size: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ── Page bg ── */
.page-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: var(--color-bg);
    transition: background 0.3s ease;
}

/* ── Typography ── */
.display-xl {
    font-size: clamp(42px, 6vw, 76px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--color-ink);
}

.display-lg {
    font-size: clamp(36px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-ink);
}

.display-md {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--color-ink);
}

.display-sm {
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--color-ink);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.eyebrow-mono {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-primary);
    display: inline-block;
    padding: 6px 18px;
    background: rgba(0, 217, 146, 0.08);
    border: 1px solid rgba(0, 217, 146, 0.15);
    border-radius: var(--rounded-full);
    margin-bottom: var(--spacing-sm);
}

.eyebrow-mono-sm {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-mute);
}

.section-title {
    font-size: clamp(24px, 3.5vw, 36px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-mute);
    max-width: 600px;
    margin: 0 auto;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Container ── */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ── Page Layout ── */
.page-header {
    padding: calc(var(--nav-height) + var(--spacing-3xl) + var(--spacing-md)) 0 var(--spacing-2xl);
    border-bottom: 1px solid var(--color-hairline);
    background: var(--color-bg);
}

.page-header-sm {
    padding: calc(var(--nav-height) + var(--spacing-2xl) + var(--spacing-md)) 0 var(--spacing-xl);
    border-bottom: 1px solid var(--color-hairline);
    background: var(--color-bg);
}

.page-body {
    padding: var(--spacing-3xl) 0 var(--spacing-6xl);
    background: var(--color-bg);
}

.page-fade-in {
    animation: pageFadeIn 0.7s ease-out forwards;
}

@keyframes pageFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* ── Grids ── */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: 1fr 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ── Site Nav ── */
:root {
    --nav-border-alpha: 0.15;
}

.dark-mode {
    --nav-border-alpha: 0.06;
}

.site-nav {
    position: fixed;
    top: calc(16px * (1 - var(--nav-progress, 0)));
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    height: var(--nav-height);
    width: calc(
        min(100vw - 48px, 1200px) * (1 - var(--nav-progress, 0)) +
        100vw * var(--nav-progress, 0)
    );
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(var(--nav-blur));
    -webkit-backdrop-filter: blur(var(--nav-blur));
    border: 1px solid rgba(255, 255, 255, calc(var(--nav-border-alpha) * (1 - var(--nav-progress, 0))));
    border-radius: calc(9999px * (1 - var(--nav-progress, 0)));
    box-shadow: var(--shadow-xl);
}

.dark-mode .site-nav {
    background: rgba(15, 15, 35, 0.75);
}

.site-nav.scrolled {
    top: 0;
    width: 100%;
    max-width: none;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: none;
    box-shadow: var(--shadow-lg);
}

.dark-mode .site-nav.scrolled {
    border-color: rgba(255, 255, 255, 0.06);
    border-top-color: transparent;
    border-left-color: transparent;
    border-right-color: transparent;
}

.nav-inner {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    height: 100%;
    position: relative;
}

.nav-brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin-right: auto;
}

.nav-brand .nav-logo {
    display: flex;
    align-items: center;
}

.nav-brand .nav-logo img {
    height: 48px;
    width: auto;
}

.logo-light {
    display: block;
}

.logo-dark {
    display: none;
}

.dark-mode .logo-light {
    display: none;
}

.dark-mode .logo-dark {
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-link {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-body);
    padding: 8px 20px;
    border-radius: var(--rounded-full);
    transition: all 0.15s ease;
}

.nav-link:hover {
    color: var(--color-ink);
    background: rgba(var(--color-primary-rgb), 0.08);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-left: auto;
}

.nav-actions .btn {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 8px 24px;
    border-radius: var(--rounded-full);
}

.nav-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(var(--color-primary-rgb), 0.08);
    color: var(--color-body);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.nav-avatar:hover {
    border-color: rgba(var(--color-primary-rgb), 0.3);
    color: var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.12);
}

/* ── Dark Mode Toggle ── */
.dark-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(var(--color-primary-rgb), 0.08);
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-body);
    font-size: 18px;
    position: relative;
}

.dark-toggle:hover {
    border-color: rgba(var(--color-primary-rgb), 0.3);
    color: var(--color-primary);
}

.dark-toggle svg {
    position: absolute;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.dark-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.light-icon {
    opacity: 0;
    transform: rotate(90deg);
}

.dark-mode .dark-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

.dark-mode .light-icon {
    opacity: 1;
    transform: rotate(0deg);
}

/* ── Nav Toggle (Hamburger) ── */
.nav-toggle {
    display: none;
    width: 28px;
    height: 20px;
    position: relative;
    cursor: pointer;
    z-index: 3;
    background: none;
    border: none;
    flex-direction: column;
    justify-content: space-between;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2.5px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* ── Mobile Menu Overlay ── */
@keyframes mobileMenuIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .site-nav {
        top: var(--spacing-sm);
        width: calc(100% - var(--spacing-md));
        border-radius: var(--rounded-xl);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    .site-nav.scrolled {
        top: 0;
        width: 100%;
        border-radius: 0;
    }
    .site-nav.mobile-open {
        top: 0;
        left: 0;
        right: 0;
        transform: none;
        width: 100%;
        border-radius: 0;
    }
    .nav-links { display: none; }
    .nav-actions { display: none; }
    .nav-toggle { display: flex; }

    .site-nav.mobile-open .nav-links {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1;
        transform: none;
        background: var(--color-bg);
        padding: calc(var(--nav-height) + var(--spacing-2xl)) var(--spacing-lg) 140px;
        overflow-y: auto;
        gap: var(--spacing-md);
        align-items: stretch;
        animation: mobileMenuIn 0.3s ease forwards;
    }

    .site-nav.mobile-open .nav-actions {
        display: flex;
        flex-direction: row;
        justify-content: center;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        top: auto;
        z-index: 2;
        transform: none;
        background: var(--color-bg);
        padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-2xl);
        border-top: 1px solid var(--color-hairline);
        gap: var(--spacing-md);
        animation: mobileMenuIn 0.3s ease forwards;
    }

    .site-nav.mobile-open .nav-link {
        font-size: 22px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.1em;
        color: var(--color-ink);
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-hairline);
    }
}

/* ── Hero Section ── */
.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 25% 25%, rgba(var(--color-primary-rgb), 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(0, 184, 255, 0.04) 0%, transparent 40%),
        linear-gradient(135deg, var(--color-canvas) 0%, rgba(var(--color-primary-rgb), 0.09) 35%, rgba(var(--color-primary-rgb), 0.14) 65%, var(--color-canvas) 100%);
    padding-top: calc(var(--nav-height) + var(--spacing-md));
}

.hero-section .container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

/* ── Hero Video Background ── */


/* ── Animated Dot Canvas ── */
.dot-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* ── Hero Decorative Elements ── */
.hero-dashed-pattern {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 24px, rgba(var(--color-primary-rgb), 0.07) 0, rgba(var(--color-primary-rgb), 0.07) 26px),
        repeating-linear-gradient(90deg, transparent, transparent 24px, rgba(var(--color-primary-rgb), 0.07) 0, rgba(var(--color-primary-rgb), 0.07) 26px),
        repeating-linear-gradient(45deg, transparent, transparent 48px, rgba(var(--color-primary-rgb), 0.04) 0, rgba(var(--color-primary-rgb), 0.04) 52px),
        repeating-linear-gradient(-45deg, transparent, transparent 48px, rgba(var(--color-primary-rgb), 0.04) 0, rgba(var(--color-primary-rgb), 0.04) 52px),
        radial-gradient(circle at 25% 25%, var(--color-primary-muted) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(0, 184, 255, 0.04) 0%, transparent 40%);
    z-index: 1;
}

.hero-grid-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    background-image:
        linear-gradient(rgba(var(--color-primary-rgb), 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--color-primary-rgb), 0.06) 1px, transparent 1px);
    background-size: 40px 40px;
}

.hero-grid-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 50%, transparent 30%, var(--color-bg) 100%);
}

.hero-bg-orb {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(80px);
    z-index: 1;
}

.hero-bg-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 217, 146, 0.12), transparent 70%);
    top: -10%;
    right: -5%;
}

.hero-bg-orb-2 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(0, 184, 255, 0.08), transparent 70%);
    bottom: -5%;
    left: -5%;
}

.hero-bg-orb-3 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(0, 217, 146, 0.05), transparent 70%);
    top: 40%;
    left: 40%;
}

/* ── 3D Cubes ── */
.hero-3d-cube {
    position: absolute;
    width: 120px;
    height: 120px;
    perspective: 600px;
    z-index: 1;
    animation: cubeFloat 6s ease-in-out infinite;
    pointer-events: none;
}

.hero-3d-cube-1 {
    top: 10%;
    right: 8%;
    animation-delay: 0s;
}

.hero-3d-cube-2 {
    top: 50%;
    right: 20%;
    animation-delay: -2s;
    width: 80px;
    height: 80px;
}

.hero-3d-cube-3 {
    bottom: 15%;
    left: 5%;
    animation-delay: -4s;
    width: 100px;
    height: 100px;
}

.cube-face {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    background: var(--color-surface);
    border: 1px solid rgba(0, 217, 146, 0.2);
    border-radius: var(--rounded-xs);
    backface-visibility: hidden;
}

.cube-front {
    transform: translateZ(60px);
}

.cube-back {
    transform: rotateY(180deg) translateZ(60px);
}

.cube-right {
    transform: rotateY(90deg) translateZ(60px);
}

.cube-left {
    transform: rotateY(-90deg) translateZ(60px);
}

.cube-top {
    transform: rotateX(90deg) translateZ(60px);
}

.cube-bottom {
    transform: rotateX(-90deg) translateZ(60px);
}

.hero-3d-cube-2 .cube-face {
    font-size: 10px;
}

.hero-3d-cube-2 .cube-front { transform: translateZ(40px); }
.hero-3d-cube-2 .cube-back { transform: rotateY(180deg) translateZ(40px); }
.hero-3d-cube-2 .cube-right { transform: rotateY(90deg) translateZ(40px); }
.hero-3d-cube-2 .cube-left { transform: rotateY(-90deg) translateZ(40px); }
.hero-3d-cube-2 .cube-top { transform: rotateX(90deg) translateZ(40px); }
.hero-3d-cube-2 .cube-bottom { transform: rotateX(-90deg) translateZ(40px); }

.hero-3d-cube-3 .cube-face {
    font-size: 16px;
}

.hero-3d-cube-3 .cube-front { transform: translateZ(50px); }
.hero-3d-cube-3 .cube-back { transform: rotateY(180deg) translateZ(50px); }
.hero-3d-cube-3 .cube-right { transform: rotateY(90deg) translateZ(50px); }
.hero-3d-cube-3 .cube-left { transform: rotateY(-90deg) translateZ(50px); }
.hero-3d-cube-3 .cube-top { transform: rotateX(90deg) translateZ(50px); }
.hero-3d-cube-3 .cube-bottom { transform: rotateX(-90deg) translateZ(50px); }

@keyframes cubeFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

/* ── Hero Badge ── */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 20px;
    background: var(--color-surface);
    color: var(--color-primary);
    border-radius: var(--rounded-full);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(0, 217, 146, 0.25);
    box-shadow: 0 4px 16px rgba(0, 217, 146, 0.15);
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ── Hero Terminal ── */
.hero-terminal {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-full);
    font-family: var(--font-mono);
    font-size: 18px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    color: var(--color-mute);
    margin-bottom: var(--spacing-lg);
}

.hero-terminal-prompt {
    color: var(--color-primary);
    font-weight: 700;
}

.hero-terminal-text {
    color: var(--color-body);
}

.hero-terminal-cursor {
    color: var(--color-primary);
    animation: blink-cursor 1s step-end infinite;
}

@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ── Hero Title ── */
.hero-title {
    margin-bottom: var(--spacing-lg);
}

.hero-title-line {
    display: block;
    font-size: clamp(42px, 6.5vw, 78px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--color-ink);
}

.hero-title-green {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(18px, 1.6vw, 22px);
    line-height: 1.7;
    color: var(--color-mute);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--spacing-xl);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-join-btn {
}

.hero-scroll-btn {
}

/* ── Hero Stats ── */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
}

.hero-stat {
    text-align: center;
}

.hero-stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1;
    margin-bottom: 2px;
}

.hero-stat-label {
    font-size: 16px;
    color: var(--color-mute);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 28px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--rounded-full);
    transition: all 0.25s ease;
    border: 1.5px solid transparent;
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--color-primary);
    color: #0a0a1a;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: 0 4px 20px rgba(0, 217, 146, 0.35);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    color: var(--color-ink);
    border-color: var(--color-hairline);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.hero-scroll-btn,
.contact-social-btn {
    background: rgba(var(--color-primary-rgb), 0.06);
    border-color: rgba(var(--color-primary-rgb), 0.2);
    backdrop-filter: blur(4px);
}

.hero-scroll-btn:hover,
.contact-social-btn:hover {
    background: rgba(var(--color-primary-rgb), 0.12);
    border-color: var(--color-primary);
}

.btn-secondary {
    background: transparent;
    color: var(--color-ink);
    border-color: var(--color-hairline);
}

.btn-secondary:hover {
    border-color: var(--color-body);
    background: var(--color-surface);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-body);
    border-color: transparent;
}

.btn-ghost:hover {
    color: var(--color-ink);
    background: var(--color-surface);
}

.btn-danger {
    background: var(--color-danger);
    color: white;
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background: var(--color-danger-hover);
    border-color: var(--color-danger-hover);
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.35);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 16px;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-glow {
    box-shadow: 0 0 24px rgba(0, 217, 146, 0.3), 0 0 60px rgba(0, 217, 146, 0.1);
}

.btn-glow:hover {
    box-shadow: 0 0 32px rgba(0, 217, 146, 0.45), 0 0 80px rgba(0, 217, 146, 0.15);
}

.btn-icon {
    padding: 10px;
    border-radius: 50%;
    aspect-ratio: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.w-full {
    width: 100%;
}

/* ── Feature Cards (Home) ── */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    max-width: 1040px;
    margin: 0 auto;
}

.feature-card,
.event-card-link,
.event-card,
.leader-card,
.member-grid .member-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    min-width: 180px;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: background 0.5s ease, box-shadow 0.5s ease, border-color 0.5s ease, transform 0.5s ease;
}

.event-card-link,
.event-card {
    text-decoration: none;
    color: inherit;
}

.member-grid .member-card {
    overflow: visible;
}

.event-card {
    overflow: hidden;
}

.feature-card:hover,
.event-card-link:hover,
.event-card:hover,
.leader-card:hover,
.member-grid .member-card:hover {
    background: var(--color-primary-muted);
    box-shadow: 0 0 20px rgba(0, 217, 146, 0.3), 0 0 60px rgba(0, 217, 146, 0.15);
    border-color: var(--color-primary);
    transform: scale(1.03);
}

.feature-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--rounded-sm);
    background: var(--color-primary-muted);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: background 0.3s ease;
}

.feature-card:hover .feature-card-icon {
    background: var(--color-primary);
    color: #fff;
}

.feature-card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.feature-card-desc {
    font-size: 18px;
    color: var(--color-mute);
    line-height: 1.7;
}

@media (max-width: 768px) {
    .feature-grid { grid-template-columns: 1fr; }
}

/* ── Event Cards (Home) ── */
.event-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.event-card-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    min-width: 180px;
    box-shadow: var(--shadow-md);
    position: relative;
    text-decoration: none;
    color: inherit;
    transition: background 0.5s ease, box-shadow 0.5s ease, border-color 0.5s ease, transform 0.5s ease;
}

.event-card-link:hover {
    background: var(--color-primary-muted);
    box-shadow: 0 0 20px rgba(0, 217, 146, 0.3), 0 0 60px rgba(0, 217, 146, 0.15);
    border-color: var(--color-primary);
    transform: scale(1.03);
}

.event-card-poster {
    width: 100%;
    aspect-ratio: 16/9;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--spacing-md);
}

.event-card-poster-placeholder {
    background: linear-gradient(135deg, var(--color-subtle), var(--color-surface));
}

.event-card-poster-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.4) 0%, transparent 50%);
    pointer-events: none;
}
.event-card-poster-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
    padding-bottom: 4px;
}
.event-card-poster-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin: 0;
    line-height: 1.2;
}
.event-card-poster-sub {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
    margin: 2px 0 0 0;
}

.event-card-date-badge {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 12px;
    background: rgba(255,255,255,0.95);
    border-radius: var(--rounded-xs);
    line-height: 1;
}

.dark-mode .event-card-date-badge {
    background: rgba(15, 15, 35, 0.95);
}

.ec-day {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-ink);
}

.ec-month {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-mute);
}

.card-event-arrow {
    position: relative;
    z-index: 1;
    color: white;
    opacity: 0;
    transform: translateX(-4px);
    transition: all 0.5s ease;
    margin-left: auto;
    align-self: flex-end;
}

.event-card-link:hover .card-event-arrow {
    opacity: 1;
    transform: translateX(0);
}

.event-card-body {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
}

.card-event-footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.card-event-tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--rounded-full);
    background: var(--color-subtle);
    color: var(--color-mute);
}

.card-event-tag-upcoming {
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

/* ── Feature Cards (General) ── */
.card-feature {
    display: block;
    background: var(--color-surface);
    border-radius: var(--rounded-md);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.card-feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-muted);
}

.card-feature-image {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-subtle);
}

.card-feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.card-feature:hover .card-feature-image img {
    transform: scale(1.05);
}

.card-feature-body {
    padding: var(--spacing-lg);
}

.card-feature-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.card-feature-body p {
    font-size: 16px;
    color: var(--color-mute);
    line-height: 1.6;
}

.card-feature-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 16px;
    color: var(--color-mute);
    margin-bottom: var(--spacing-sm);
}

/* ── Event Cards (List page) ── */
.event-card-image {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
}

.event-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.event-card:hover .event-card-image img {
    transform: scale(1.05);
}

.event-card-body {
    padding: var(--spacing-lg);
    text-align: left;
    width: 100%;
}

.event-card-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 16px;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.event-card-meta svg {
    flex-shrink: 0;
}

.event-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 4px;
    line-height: 1.3;
}

.event-card-location {
    font-size: 16px;
    color: var(--color-mute);
}

.event-card .fallback {
    opacity: 0.3;
}

/* ── Event Detail ── */
.event-detail-page {
    padding-top: calc(var(--nav-height) + var(--spacing-md));
    background: var(--color-bg);
    min-height: 100vh;
}

.event-detail-page .container {
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-6xl);
}

.event-detail-card {
    display: block;
    background: var(--color-surface);
    border-radius: var(--rounded-md);
    overflow: hidden;
    border: 1px solid var(--color-hairline);
}

.event-detail-poster {
    width: 100%;
    max-height: 400px;
    overflow: hidden;
    background: var(--color-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
}

.event-detail-poster img {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
}

.event-detail-body {
    padding: var(--spacing-xl);
}

.event-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-hairline);
}

.event-detail-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 16px;
    color: var(--color-body);
}

.event-detail-meta-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--color-primary);
}

.event-detail-description {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-body);
    margin-bottom: var(--spacing-2xl);
}

.event-detail-description p {
    margin-bottom: var(--spacing-md);
}

.event-registration-box {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-sm);
}

.event-gallery {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--color-hairline);
}

.event-gallery h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--spacing-lg);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.gallery-grid img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--rounded-xs);
    transition: transform 0.3s ease;
}

.gallery-grid img:hover {
    transform: scale(1.03);
}

@media (max-width: 768px) {
    .gallery-grid { grid-template-columns: 1fr 1fr; }
}

/* ── Status Tags ── */
.status-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 14px;
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--rounded-full);
    background: var(--color-subtle);
    color: var(--color-mute);
}

.status-tag.active {
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.status-tag.live {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.status-tag.pending {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
}

/* ── Payment Methods ── */
.payment-methods {
    display: flex;
    gap: var(--spacing-sm);
}

.payment-method-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px 20px;
    border: 1.5px solid var(--color-hairline);
    border-radius: var(--rounded-xs);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-body);
    background: var(--color-bg);
}

.payment-method-option input {
    display: none;
}

.payment-method-option.active {
    border-color: var(--color-primary);
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.payment-method-option:hover {
    border-color: var(--color-body);
}

/* ── Toast ── */
.toast-container {
    position: fixed;
    top: calc(var(--nav-height) + var(--spacing-md) * 2);
    right: var(--spacing-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 420px;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 14px 20px;
    border-radius: var(--rounded-xs);
    font-size: 16px;
    font-weight: 500;
    background: var(--color-primary-muted);
    color: var(--color-primary);
    border: 1px solid rgba(0, 217, 146, 0.2);
    animation: toastSlideIn 0.35s ease forwards;
    box-shadow: var(--shadow-lg);
}

.toast.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.2);
}

.toast.info {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border-color: rgba(59, 130, 246, 0.2);
}

.toast-icon {
    flex-shrink: 0;
}

.toast-close {
    margin-left: auto;
    font-size: 18px;
    color: inherit;
    opacity: 0.5;
    transition: opacity 0.2s ease;
    line-height: 1;
    padding: 0 4px;
}

.toast-close:hover {
    opacity: 1;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ── Forms ── */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
}

.form-hint {
    font-size: 16px;
    color: var(--color-mute);
    margin-top: var(--spacing-xs);
}

.text-input,
.form-input,
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    color: var(--color-ink);
    background: var(--color-bg);
    border: 1.5px solid var(--color-hairline);
    border-radius: var(--rounded-xs);
    transition: all 0.2s ease;
    outline: none;
}

.text-input:focus,
.form-input:focus,
textarea:focus,
select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-muted);
}

.text-input::placeholder,
.form-input::placeholder {
    color: var(--color-mute);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

.help-text {
    font-size: 16px;
    color: var(--color-mute);
    margin-top: 4px;
}

.error-text {
    font-size: 16px;
    color: var(--color-danger);
    margin-top: 4px;
}

/* ── Auth Pages ── */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--color-bg);
    padding-top: calc(var(--nav-height) + var(--spacing-xl) + var(--spacing-md));
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    padding: var(--spacing-xl);
}

.auth-card-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary-muted);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.auth-icon svg {
    width: 24px;
    height: 24px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.auth-form .form-group {
    margin-bottom: 0;
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-hairline);
    font-size: 16px;
    color: var(--color-body);
}

.auth-footer a {
    color: var(--color-primary);
    font-weight: 600;
}

.back-home {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-body);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-full);
    transition: all 0.25s ease;
}

.back-home:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

/* ── Profile Page ── */
.profile-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--color-bg);
}

.profile-card {
    width: 100%;
    max-width: 480px;
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    overflow: hidden;
}

.profile-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-2xl) 0;
}

.profile-header-inner {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.profile-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-avatar-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--color-primary-muted);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 700;
    flex-shrink: 0;
}

.profile-name {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 2px;
}

.profile-role {
    font-size: 16px;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.profile-bio {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    max-width: 600px;
}

.profile-body {
    padding: var(--spacing-2xl) 0 var(--spacing-6xl);
}

.profile-details {
    display: grid;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-2xl);
}

.profile-field {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-hairline);
}

.profile-field:last-child {
    border-bottom: none;
}

.profile-field-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-mute);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
}

.profile-field-value {
    font-size: 16px;
    color: var(--color-body);
}

.profile-membership-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 16px;
    border-radius: var(--rounded-full);
    font-size: 16px;
    font-weight: 600;
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.profile-actions {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-2xl) var(--spacing-2xl);
    border-top: 1px solid var(--color-hairline);
    margin-top: var(--spacing-lg);
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.profile-stat-card {
    padding: var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-sm);
    text-align: center;
}

.profile-stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1;
    margin-bottom: 4px;
}

.profile-stat-label {
    font-size: 16px;
    color: var(--color-mute);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.profile-edit-form {
    padding: 0 var(--spacing-2xl) var(--spacing-2xl);
    text-align: center;
}

.profile-edit-form .form-label {
    text-align: center;
}

.profile-edit-form .text-input,
.profile-edit-form .form-input {
    text-align: center;
}

.profile-edit-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.profile-edit-form .form-actions {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-hairline);
    margin-top: var(--spacing-xl);
}

.qr-section {
    text-align: center;
    padding: 0 var(--spacing-2xl) var(--spacing-lg);
}

.qr-section img {
    display: block;
    margin: 0 auto;
}

@media (max-width: 640px) {
    .profile-page {
        padding: var(--spacing-md);
        align-items: flex-start;
        padding-top: var(--spacing-xl);
    }

    .profile-card {
        border-radius: var(--rounded-sm);
    }

    .profile-header {
        padding: var(--spacing-lg) var(--spacing-lg) 0;
    }

    .profile-avatar {
        width: 72px;
        height: 72px;
    }

    .profile-avatar svg {
        width: 20px;
        height: 20px;
    }

    .profile-details {
        padding: 0 var(--spacing-lg);
    }

    .profile-field {
        flex-direction: column;
        align-items: center;
        gap: 2px;
    }

    .profile-actions {
        flex-direction: column;
        padding: var(--spacing-lg);
    }

    .profile-edit-form {
        padding: 0 var(--spacing-lg) var(--spacing-lg);
    }

    .profile-edit-form .form-actions {
        flex-direction: column;
    }

    .qr-section {
        padding: 0 var(--spacing-lg) var(--spacing-lg);
    }

    .profile-stats { grid-template-columns: 1fr; }
}

/* ── Team Page ── */
.team-panel {
    margin-bottom: var(--spacing-4xl);
}

.team-panel:last-child {
    margin-bottom: 0;
}

.panel-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.panel-subtitle {
    font-size: 16px;
    color: var(--color-mute);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.member-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.member-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: var(--rounded-full);
    background: var(--color-primary-muted);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.member-avatar-wrap {
    position: relative;
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
}

.member-avatar,
.member-avatar-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.member-avatar {
    background: var(--color-primary-muted);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    border: 2px solid var(--color-hairline);
}

.member-verified {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #0a0a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-surface);
}

.member-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 2px;
}

.member-role {
    font-size: 16px;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.member-dept {
    font-size: 16px;
    color: var(--color-mute);
    margin-bottom: var(--spacing-sm);
}

.member-desc {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.member-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    margin-bottom: var(--spacing-md);
}

.tag {
    display: inline-flex;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--rounded-full);
    background: var(--color-subtle);
    color: var(--color-mute);
}

.member-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.member-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-mute);
    transition: all 0.2s ease;
}

.member-link:hover {
    background: var(--color-primary-muted);
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* ── Member Card (public profile) ── */
.member-card-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--color-bg);
}

.member-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-md);
    overflow: hidden;
}

.member-card-top {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-xl) 0;
}

.member-card-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    border: 3px solid var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-muted);
    color: var(--color-primary);
}

.member-card-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-card-details {
    padding: var(--spacing-lg) var(--spacing-xl);
}

.member-card-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-hairline);
    font-size: 16px;
}

.member-card-row:last-child {
    border-bottom: none;
}

.member-card-row-label {
    color: var(--color-mute);
    font-weight: 500;
}

.member-card-row-value {
    color: var(--color-ink);
    font-weight: 600;
}

.member-card-qr {
    text-align: center;
    padding: 0 var(--spacing-xl) var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.member-card-footer {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-hairline);
    text-align: center;
    font-size: 16px;
    color: var(--color-mute);
}

.member-card-footer a {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
}

/* ── Leader Section (Home) ── */
.leader-tree {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.leader-card-wrap {
    display: flex;
    justify-content: center;
}

.leader-avatar-wrap {
    position: relative;
    margin-bottom: var(--spacing-sm);
}

.leader-card .leader-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--color-primary-muted);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    border: 2px solid var(--color-primary);
}

.leader-avatar-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-primary);
    display: block;
}

.leader-check {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #0a0a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--color-surface);
    transform: translate(2px, 2px);
}

.leader-card {
    width: 220px;
    min-height: 210px;
}

.leader-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 2px;
}

.leader-role {
    font-size: 16px;
    color: var(--color-mute);
    font-weight: 500;
}

/* ── Leader Tree Lines ── */
.tree-lines {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px;
    position: relative;
    width: 100%;
}

.tree-line-v {
    width: 2px;
    height: 100%;
    background: #00d992;
}

.tree-line-h {
    position: absolute;
    top: 50%;
    left: 10%;
    right: 10%;
    height: 2px;
    background: #00d992;
}

.tree-line-branch {
    position: absolute;
    top: 0;
    width: 2px;
    height: 50%;
    background: #00d992;
}

.tree-line-branch-down {
    position: absolute;
    top: 50%;
    width: 2px;
    height: 50%;
    background: #00d992;
}

.tree-line-branch.l1, .tree-line-branch-down.l1 { left: 12.5%; }
.tree-line-branch.l2, .tree-line-branch-down.l2 { left: 37.5%; }
.tree-line-branch.l3, .tree-line-branch-down.l3 { left: 62.5%; }
.tree-line-branch.l4, .tree-line-branch-down.l4 { left: 87.5%; }

.leader-row-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    width: 100%;
}

.leader-row-center {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    width: 100%;
}

/* ── Team CTA ── */
.team-cta {
    margin-top: var(--spacing-3xl);
    text-align: center;
}

/* ── Content Band ── */
.content-band {
    padding: var(--spacing-5xl) 0;
}

.section-head-center {
    text-align: center;
}

/* ── Fallback ── */
.fallback {
    opacity: 0.3;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

/* ── Section ── */
.section {
    padding: var(--spacing-5xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-divider {
    display: none;
}

/* ── Stats Section ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-sm);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 16px;
    color: var(--color-mute);
    font-weight: 500;
}

/* ── Site Footer ── */
.site-footer {
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
    background: #181830;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand img {
    height: 44px;
    width: auto;
    margin-bottom: var(--spacing-md);
}

.footer-tagline {
    font-size: 16px;
    color: #8a8aa0;
    line-height: 1.6;
    max-width: 320px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #8a8aa0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.footer-col a {
    font-size: 16px;
    color: #b0b0c8;
    transition: color 0.2s ease;
}

.footer-col a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer-bottom p {
    font-size: 16px;
    color: #6a6a80;
}

@media (max-width: 768px) {
    .footer-inner {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    .footer-links { max-width: 400px; }
}

/* ── Pagination ── */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-sm);
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--rounded-xs);
    transition: all 0.2s ease;
}

.pagination a {
    color: var(--color-body);
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    text-decoration: none;
}

.pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination .current {
    background: var(--color-primary);
    color: #0a0a1a;
    font-weight: 600;
    border: 1px solid var(--color-primary);
}

.pagination .disabled {
    color: var(--color-mute);
    opacity: 0.5;
    cursor: not-allowed;
    border: 1px solid var(--color-hairline);
    background: var(--color-surface);
}

/* ── Messages / Alerts ── */
.message {
    padding: 14px 20px;
    border-radius: var(--rounded-xs);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.message.success {
    background: var(--color-primary-muted);
    color: var(--color-primary);
    border: 1px solid rgba(0, 217, 146, 0.2);
}

.message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.message.info {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* ── Content Card ── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-hairline);
    border-radius: var(--rounded-sm);
    padding: var(--spacing-xl);
}

/* ── Utility ── */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* ── Avatar Sizes ── */
.avatar-xs { width: 32px; height: 32px; }
.avatar-sm { width: 48px; height: 48px; }
.avatar-md { width: 64px; height: 64px; }
.avatar-lg { width: 100px; height: 100px; }
.avatar-xl { width: 140px; height: 140px; }

/* ── Error Pages ── */
.error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-bg);
}

.error-code {
    font-size: 120px;
    font-weight: 800;
    line-height: 1;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.error-message {
    font-size: 20px;
    color: var(--color-mute);
    margin-bottom: var(--spacing-xl);
}

/* ── join-guide section ── */
.join-section {
    padding: var(--spacing-5xl) 0;
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-subtle);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-mute);
}

.dark-mode ::-webkit-scrollbar-track {
    background: var(--color-bg);
}

.dark-mode ::-webkit-scrollbar-thumb {
    background: var(--color-subtle);
}

/* ── Selection ── */
::selection {
    background: var(--color-primary-muted);
    color: var(--color-ink);
}

.dark-mode ::selection {
    background: rgba(0, 217, 146, 0.2);
    color: var(--color-ink);
}

/* ── Animation / Scroll Reveal ── */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-left {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-right {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

@keyframes staggerFadeIn {
    to { opacity: 1; transform: translateY(0); }
}

.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
}

.stagger-children.visible > * {
    animation: staggerFadeIn 0.5s ease forwards;
}

.stagger-children.visible > *:nth-child(1) { animation-delay: 0s; }
.stagger-children.visible > *:nth-child(2) { animation-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { animation-delay: 0.2s; }
.stagger-children.visible > *:nth-child(4) { animation-delay: 0.3s; }
.stagger-children.visible > *:nth-child(5) { animation-delay: 0.4s; }
.stagger-children.visible > *:nth-child(6) { animation-delay: 0.5s; }

/* ── Responsive: Tablet & Mobile ── */
@media (max-width: 1024px) {
    .hero-3d-cube {
        display: none;
    }

    .hero-section {
        min-height: 70vh;
    }

    .event-card-grid {
        grid-template-columns: 1fr 1fr;
    }

    .leader-row-4 {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: calc(var(--nav-height) + var(--spacing-2xl) + var(--spacing-md)) 0 var(--spacing-xl);
    }

    .page-body {
        padding: var(--spacing-2xl) 0 var(--spacing-4xl);
    }

    .hero-section {
        min-height: 65vh;
    }

    .hero-bg-orb-1 {
        width: 300px;
        height: 300px;
    }

    .hero-bg-orb-2 {
        width: 200px;
        height: 200px;
    }

    .hero-bg-orb-3 {
        display: none;
    }

    .hero-stats {
        gap: var(--spacing-lg);
    }

    .event-card-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
    }

    .profile-stats {
        grid-template-columns: 1fr;
    }

    .leader-row-4 {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .leader-card {
        width: 100%;
    }

    .leader-card-wrap {
        width: 100%;
        margin-bottom: var(--spacing-lg);
    }

    .tree-lines {
        display: none;
    }

    .auth-card {
        padding: var(--spacing-lg);
    }
}

@media (max-width: 640px) {
    .hero-title-line {
        font-size: 36px;
    }

    .hero-section {
        min-height: 60vh;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .member-card {
        padding: var(--spacing-lg);
    }

    .member-grid {
        grid-template-columns: 1fr;
    }

    .contact-social-btn {
        padding: 10px 14px;
        font-size: 14px;
    }
    .contact-social-btn img {
        width: 14px;
        height: 14px;
    }
    .social-btn-label {
        display: none;
    }
}

/* ── Print ── */
@media print {
    .site-nav,
    .site-footer,
    .dark-toggle {
        display: none;
    }

    .page-header {
        padding-top: var(--spacing-lg);
    }

    body {
        background: white;
        color: black;
    }
}