/* ================================
   AI Fluency Blog - Stylesheet
   Editorial meets Futurism
   ================================ */

/* CSS Variables */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --bg-elevated: #1f1f23;

    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-muted: #52525b;

    --accent-primary: #00d4ff;
    --accent-secondary: #7c3aed;
    --accent-tertiary: #f59e0b;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #7c3aed 50%, #f59e0b 100%);

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.15);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 60px rgba(0, 212, 255, 0.15);

    --font-display: 'Syne', sans-serif;
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-mono: 'JetBrains Mono', monospace;

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

    --nav-height: 80px;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #fafafa;
    --bg-secondary: #f4f4f5;
    --bg-tertiary: #e4e4e7;
    --bg-elevated: #ffffff;

    --text-primary: #09090b;
    --text-secondary: #52525b;
    --text-tertiary: #71717a;
    --text-muted: #a1a1aa;

    --accent-primary: #0099cc;
    --accent-secondary: #6d28d9;
    --accent-tertiary: #d97706;

    --border-subtle: rgba(0, 0, 0, 0.04);
    --border-medium: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.12);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 60px rgba(0, 153, 204, 0.1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-serif);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: default;
}

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

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

/* Cursor Glow Effect */
.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
    transform: translate(-50%, -50%);
}

body:hover .cursor-glow {
    opacity: 1;
}

[data-theme="light"] .cursor-glow {
    background: radial-gradient(circle, rgba(0, 153, 204, 0.06) 0%, transparent 70%);
}

/* ================================
   Navigation
   ================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-theme="light"] .nav {
    background: rgba(250, 250, 250, 0.85);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo-icon {
    color: var(--accent-primary);
    font-size: 1.5rem;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.logo-accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
    position: relative;
    padding: 8px 0;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s var(--ease-out-expo);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border-medium);
    background: var(--bg-secondary);
    transition: all 0.3s ease;
    overflow: hidden;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.theme-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.25rem;
    transition: all 0.4s var(--ease-out-expo);
}

.theme-icon.sun {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg) scale(0.5);
}

.theme-icon.moon {
    opacity: 1;
}

[data-theme="light"] .theme-icon.sun {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0) scale(1);
}

[data-theme="light"] .theme-icon.moon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg) scale(0.5);
}

.btn-subscribe {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 12px 24px;
    background: var(--text-primary);
    color: var(--bg-primary);
    border-radius: 8px;
    letter-spacing: 0.02em;
    transition: all 0.3s ease;
}

.btn-subscribe:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ================================
   Hero Section
   ================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 40px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
}

[data-theme="light"] .grid-overlay {
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.3) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation-delay: -5s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.25) 0%, transparent 70%);
    bottom: -150px;
    left: -100px;
    animation-delay: -10s;
}

[data-theme="light"] .orb-1 {
    background: radial-gradient(circle, rgba(0, 153, 204, 0.2) 0%, transparent 70%);
}

[data-theme="light"] .orb-2 {
    background: radial-gradient(circle, rgba(109, 40, 217, 0.15) 0%, transparent 70%);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(-30px, -20px) scale(1.02); }
}

.noise-overlay {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    text-align: center;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out-expo) 0.2s forwards;
}

.tag-line {
    width: 40px;
    height: 1px;
    background: var(--text-muted);
}

.tag-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-tertiary);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 48px;
}

.title-line {
    display: block;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out-expo) forwards;
}

.line-1 { animation-delay: 0.3s; }
.line-2 { animation-delay: 0.4s; }
.line-3 { animation-delay: 0.5s; }
.line-4 { animation-delay: 0.6s; }
.line-5 { animation-delay: 0.7s; }

.title-line em {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.strike-through {
    position: relative;
    color: var(--text-muted);
}

.strike-through::after {
    content: '';
    position: absolute;
    top: 50%;
    left: -4px;
    right: -4px;
    height: 4px;
    background: var(--accent-tertiary);
    transform: scaleX(0);
    transform-origin: left;
    animation: strike 0.6s var(--ease-out-expo) 1.2s forwards;
}

@keyframes strike {
    to { transform: scaleX(1); }
}

.blink {
    animation: blink 1s step-end infinite;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out-expo) 0.9s forwards;
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meta-label {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
}

.meta-value {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.meta-divider {
    width: 1px;
    height: 32px;
    background: var(--border-medium);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out-expo) 1.2s forwards;
}

.scroll-text {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-muted);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: var(--border-medium);
    position: relative;
    overflow: hidden;
}

.scroll-dot {
    width: 3px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 2px;
    position: absolute;
    left: -1px;
    animation: scrollDown 2s var(--ease-in-out) infinite;
}

@keyframes scrollDown {
    0% { top: -12px; opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { top: 60px; opacity: 0; }
}

/* ================================
   Section Headers
   ================================ */
.section-header {
    max-width: 1400px;
    margin: 0 auto 48px;
    padding: 0 40px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.section-label {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.label-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-primary);
}

.label-text {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

.section-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-medium) 0%, transparent 100%);
}

/* ================================
   Featured Section
   ================================ */
.featured {
    padding: 120px 0;
}

.featured-article {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.featured-image {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
}

.image-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.placeholder-grid {
    position: absolute;
    inset: -50%;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    transform: perspective(500px) rotateX(60deg);
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(30px); }
}

.placeholder-text {
    font-family: var(--font-display);
    font-size: 8rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    position: relative;
    z-index: 1;
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, var(--bg-primary) 100%);
    opacity: 0.6;
}

.featured-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
}

.category {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    padding: 6px 12px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 4px;
}

[data-theme="light"] .category {
    background: rgba(0, 153, 204, 0.1);
}

.read-time {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.featured-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.featured-excerpt {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.featured-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--bg-primary);
}

.author-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.author-name {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
}

.author-role {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-primary);
    transition: gap 0.3s var(--ease-out-expo);
}

.read-more:hover {
    gap: 16px;
}

.read-more svg {
    transition: transform 0.3s var(--ease-out-expo);
}

.read-more:hover svg {
    transform: translateX(4px);
}

/* ================================
   Perspectives Grid
   ================================ */
.perspectives {
    padding: 80px 0 120px;
    background: var(--bg-secondary);
}

.perspectives-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.perspective-card {
    position: relative;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.4s var(--ease-out-expo);
    overflow: hidden;
    cursor: pointer;
}

.perspective-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.perspective-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.perspective-card:hover::before {
    opacity: 1;
}

.perspective-card.card-large {
    grid-column: span 2;
    grid-row: span 2;
    padding: 48px;
}

.card-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card-category {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-secondary);
    margin-bottom: 16px;
}

.card-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 12px;
    flex-grow: 0;
}

.card-large .card-title {
    font-size: 2rem;
    margin-bottom: 20px;
}

.card-excerpt {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-secondary);
    flex-grow: 1;
}

.card-large .card-excerpt {
    font-size: 1.0625rem;
}

.card-footer {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}

.card-date, .card-read {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.card-number {
    position: absolute;
    bottom: 20px;
    right: 24px;
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    color: var(--border-subtle);
    line-height: 1;
    transition: color 0.4s ease;
}

.perspective-card:hover .card-number {
    color: var(--border-medium);
}

.card-large .card-number {
    font-size: 8rem;
    bottom: 32px;
    right: 40px;
}

/* ================================
   Quote Section
   ================================ */
.quote-section {
    padding: 120px 40px;
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

.quote-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.quote-container {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.big-quote {
    position: relative;
}

.quote-mark {
    font-family: var(--font-serif);
    font-size: 8rem;
    line-height: 0;
    color: var(--accent-primary);
    opacity: 0.3;
    position: absolute;
}

.quote-mark:first-child {
    top: 40px;
    left: -40px;
}

.quote-mark.closing {
    bottom: 0;
    right: -40px;
}

.big-quote p {
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 400;
    font-style: italic;
    line-height: 1.5;
    color: var(--text-primary);
    padding: 0 60px;
}

.quote-attribution {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    margin-top: 40px;
}

.attr-line {
    width: 40px;
    height: 1px;
    background: var(--accent-primary);
}

.attr-text {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
}

/* ================================
   Frameworks Section
   ================================ */
.frameworks {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.frameworks-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.framework-item {
    display: flex;
    gap: 24px;
    padding: 32px;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    transition: all 0.4s var(--ease-out-expo);
}

.framework-item:hover {
    border-color: var(--border-medium);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.framework-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.framework-icon svg {
    width: 48px;
    height: 48px;
    color: var(--accent-primary);
}

.framework-content h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.framework-content p {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.framework-link {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-primary);
    transition: letter-spacing 0.3s ease;
}

.framework-link:hover {
    letter-spacing: 0.02em;
}

/* ================================
   Stats Ticker
   ================================ */
.stats-ticker {
    padding: 24px 0;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    overflow: hidden;
}

.ticker-track {
    display: flex;
}

.ticker-content {
    display: flex;
    align-items: center;
    gap: 40px;
    animation: ticker 30s linear infinite;
    white-space: nowrap;
}

@keyframes ticker {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.stat-item {
    font-family: var(--font-display);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat-value {
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-divider {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ================================
   Newsletter Section
   ================================ */
.newsletter {
    padding: 120px 40px;
    background: var(--bg-primary);
}

.newsletter-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 80px;
    align-items: center;
}

.newsletter-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-tertiary);
    margin-bottom: 16px;
    display: inline-block;
}

.newsletter-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.newsletter-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.newsletter-form {
    max-width: 480px;
}

.form-group {
    display: flex;
    gap: 12px;
}

.form-group input {
    flex: 1;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-medium);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 28px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.form-group button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}

.form-note {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 12px;
}

.newsletter-visual {
    position: relative;
    height: 320px;
}

.visual-stack {
    position: relative;
    height: 100%;
}

.stack-card {
    position: absolute;
    width: 100%;
    padding: 24px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-medium);
    border-radius: 12px;
    transition: all 0.4s var(--ease-out-expo);
}

.stack-card.card-1 {
    top: 0;
    z-index: 3;
    box-shadow: var(--shadow-lg);
}

.stack-card.card-2 {
    top: 40px;
    left: 20px;
    z-index: 2;
    opacity: 0.7;
    transform: scale(0.95);
}

.stack-card.card-3 {
    top: 80px;
    left: 40px;
    z-index: 1;
    opacity: 0.4;
    transform: scale(0.9);
}

.card-label {
    font-family: var(--font-mono);
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-primary);
    display: block;
    margin-bottom: 8px;
}

.card-headline {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
}

/* ================================
   Futures Section
   ================================ */
.futures {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.futures-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.future-card {
    padding: 40px;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    transition: all 0.4s var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.future-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease-out-expo);
}

.future-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.future-card:hover::after {
    transform: scaleX(1);
}

.future-year {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-tertiary);
    margin-bottom: 16px;
    display: block;
}

.future-card h3 {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.future-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.future-link {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--accent-primary);
}

/* ================================
   Footer
   ================================ */
.footer {
    padding: 80px 40px 40px;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-subtle);
}

.footer-top {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h4 {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    padding: 6px 0;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 40px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.footer-social a:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1024px) {
    .featured-article {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .perspective-card.card-large {
        grid-column: span 2;
        grid-row: span 1;
    }

    .frameworks-container {
        grid-template-columns: 1fr;
    }

    .newsletter-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .newsletter-visual {
        display: none;
    }

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

@media (max-width: 768px) {
    :root {
        --nav-height: 70px;
    }

    .nav-container {
        padding: 0 24px;
    }

    .nav-links {
        display: none;
    }

    .btn-subscribe {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: 100px 24px 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-meta {
        flex-direction: column;
        gap: 16px;
    }

    .meta-divider {
        display: none;
    }

    .section-header {
        padding: 0 24px;
    }

    .featured-article {
        padding: 0 24px;
    }

    .perspectives-grid {
        grid-template-columns: 1fr;
        padding: 0 24px;
    }

    .perspective-card.card-large {
        grid-column: span 1;
        padding: 32px;
    }

    .card-large .card-title {
        font-size: 1.5rem;
    }

    .card-large .card-number {
        font-size: 5rem;
    }

    .quote-section {
        padding: 80px 24px;
    }

    .quote-mark {
        font-size: 5rem;
    }

    .quote-mark:first-child {
        left: -10px;
    }

    .quote-mark.closing {
        right: -10px;
    }

    .big-quote p {
        padding: 0 30px;
    }

    .frameworks-container {
        padding: 0 24px;
    }

    .framework-item {
        flex-direction: column;
        gap: 16px;
    }

    .newsletter {
        padding: 80px 24px;
    }

    .form-group {
        flex-direction: column;
    }

    .futures-grid {
        padding: 0 24px;
    }

    .footer {
        padding: 60px 24px 30px;
    }

    .footer-top {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 40px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}