/* ========================================
   Resend-style Dark Theme
   ======================================== */

:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --bg-card: #0d0d0d;
    --border-color: #1a1a1a;
    --border-light: #262626;
    --text-primary: #ffffff;
    --text-secondary: #a1a1a1;
    --text-muted: #6b6b6b;
    --accent-primary: #ffffff;
    --accent-gradient: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 100%);
    --glow-color: rgba(255, 255, 255, 0.1);
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

* {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Page Wrapper
   ======================================== */

.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Smoke Canvas Background */
#smoke-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* Ensure content stays above smoke */
.main-content,
.site-header,
.site-footer {
    position: relative;
    z-index: 1;
}

/* ========================================
   Header & Navigation
   ======================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-logo svg {
    width: 24px;
    height: 24px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links .nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: 0;
    background: none;
    border: none;
}

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

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

.nav-actions .btn-primary,
.nav-actions .btn-secondary {
    background: rgba(150, 150, 150, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.8);
    color: var(--text-primary);
    border-radius: 100px;
    padding: 6px 16px;
}

.nav-actions .btn-primary:hover,
.nav-actions .btn-secondary:hover {
    background: rgba(180, 180, 180, 0.3);
    border-color: #ffffff;
}

.nav-actions .btn-glow {
    padding: 6px 16px;
    font-size: 14px;
}

/* ========================================
   Buttons
   ======================================== */

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 50%);
    pointer-events: none;
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    color: var(--bg-primary);
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 8px;
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border-color: var(--text-secondary);
    text-decoration: none;
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: 10px;
}

/* Glowing Peach Button */
.btn-glow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: #ffeee6;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 50px;
    border: 1px solid #ccc;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.btn-glow::before {
    content: '';
    position: absolute;
    width: 100px;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.8),
        transparent
    );
    top: 0;
    left: -100px;
    animation: glowMove 2.5s ease-in-out infinite;
}

.btn-glow::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 50px;
    background: linear-gradient(
        var(--glow-angle, 0deg),
        transparent 40%,
        rgba(255, 200, 150, 0.6) 50%,
        transparent 60%
    );
    z-index: -1;
    animation: glowRotate 3s linear infinite;
    filter: blur(8px);
}

@property --glow-angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

@keyframes glowMove {
    0% {
        left: -100px;
    }
    50% {
        left: calc(100% + 100px);
    }
    100% {
        left: calc(100% + 100px);
    }
}

@keyframes glowRotate {
    0% {
        --glow-angle: 0deg;
    }
    100% {
        --glow-angle: 360deg;
    }
}

.btn-glow:hover {
    background: #ffe4d9;
    border-color: #bbb;
    text-decoration: none;
    color: #333;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(255, 180, 130, 0.3);
}

.btn-icon {
    gap: 8px;
}

.btn-icon svg {
    width: 16px;
    height: 16px;
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 8px;
    cursor: pointer;
}

.mobile-menu {
    padding: 16px 0;
    border-top: 1px solid var(--border-color);
}

.mobile-link {
    display: block;
    padding: 12px 0;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
}

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

.mobile-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 16px;
    margin-top: 16px;
    border-top: 1px solid var(--border-color);
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }

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

/* ========================================
   Main Content
   ======================================== */

.main-content {
    flex: 1;
    padding-top: 64px;
}

/* ========================================
   Hero Section
   ======================================== */

.hero-section {
    position: relative;
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 80px 120px;
}

@media (max-width: 1200px) {
    .hero-section {
        padding: 80px 60px;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 60px 24px;
    }
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(50, 50, 80, 0.3) 0%, transparent 60%);
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(100, 100, 150, 0.15) 0%, transparent 70%);
    filter: blur(60px);
    pointer-events: none;
}

.hero-grid {
    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;
    pointer-events: none;
}

.hero-wrapper {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: left;
}

@media (max-width: 1024px) {
    .hero-content {
        text-align: center;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(48px, 8vw, 80px);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin: 0 0 24px;
    background: linear-gradient(180deg, #ffffff 0%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    max-width: 600px;
}

.hero-subtitle {
    font-size: clamp(18px, 2.5vw, 22px);
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 0 48px;
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .hero-subtitle {
        margin: 0 auto 48px;
    }
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

@media (max-width: 1024px) {
    .hero-actions {
        justify-content: center;
    }
}

/* Hero Video with Animated Gradient Border */
@property --gradient-angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

.hero-video {
    position: relative;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(
        var(--gradient-angle),
        #ff0080,
        #ff8c00,
        #40e0d0,
        #00bfff,
        #8a2be2,
        #ff0080
    );
    animation: rotateGradient 4s linear infinite;
    box-shadow:
        0 0 30px rgba(255, 0, 128, 0.3),
        0 0 60px rgba(64, 224, 208, 0.2),
        0 0 90px rgba(138, 43, 226, 0.15);
}

.hero-video::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 2px;
    background: linear-gradient(
        var(--gradient-angle),
        #ff0080,
        #ff8c00,
        #40e0d0,
        #00bfff,
        #8a2be2,
        #ff0080
    );
    filter: blur(15px);
    opacity: 0.7;
    animation: rotateGradient 4s linear infinite;
    z-index: -1;
}

@keyframes rotateGradient {
    0% {
        --gradient-angle: 0deg;
    }
    100% {
        --gradient-angle: 360deg;
    }
}

.equation-showcase,
.video-container {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    background: var(--bg-primary);
}

.video-container video {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 18px;
}

.video-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.03) 0%,
        transparent 50%
    );
    pointer-events: none;
    border-radius: 18px;
}

@media (max-width: 1024px) {
    .hero-video {
        max-width: 600px;
        margin: 0 auto;
    }
}

/* ========================================
   Features Section
   ======================================== */

.features-section {
    padding: 120px 24px;
    border-top: 1px solid var(--border-color);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 80px;
}

.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
}

.section-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: var(--bg-primary);
    padding: 40px;
    transition: background var(--transition-normal);
}

.feature-card:hover {
    background: var(--bg-secondary);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

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

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 12px;
    color: var(--text-primary);
}

.feature-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ========================================
   Code Preview Section
   ======================================== */

.code-section {
    padding: 120px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.code-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 900px) {
    .code-preview {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.code-content h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
}

.code-content p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 32px;
}

.code-block {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #ff5f56; }
.code-dot.yellow { background: #ffbd2e; }
.code-dot.green { background: #27c93f; }

.code-body {
    padding: 24px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.7;
    overflow-x: auto;
}

.code-body pre {
    margin: 0;
    color: var(--text-secondary);
}

.code-keyword { color: #c792ea; }
.code-function { color: #82aaff; }
.code-string { color: #c3e88d; }
.code-comment { color: #546e7a; }
.code-variable { color: #f78c6c; }

/* ========================================
   Stats Section
   ======================================== */

.stats-section {
    padding: 80px 24px;
    border-top: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

.stat-item {
    padding: 20px;
}

.stat-number {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    background: linear-gradient(180deg, #ffffff 0%, rgba(255,255,255,0.6) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 15px;
    color: var(--text-secondary);
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    padding: 120px 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
}

.cta-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 40px;
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ========================================
   Footer
   ======================================== */

.site-footer {
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
    padding: 80px 24px 40px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

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

.footer-brand {
    max-width: 280px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    margin-bottom: 16px;
}

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

.footer-tagline {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0 0 24px;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-links-group h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 20px;
}

.footer-links-group a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    padding: 6px 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
}

/* ========================================
   Utilities
   ======================================== */

.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles */
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

a:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: rgba(255, 255, 255, 0.2);
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========================================
   Blog Styles
   ======================================== */

/* Blog Hero */
.blog-hero {
    padding: 120px 24px 60px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.blog-hero-title {
    font-size: clamp(40px, 6vw, 56px);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 16px;
    background: linear-gradient(180deg, #ffffff 0%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.blog-hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin: 0;
}

/* Blog List */
.blog-list-section {
    padding: 80px 24px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

@media (max-width: 1024px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}

.blog-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.blog-card:hover {
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.4);
}

.blog-card-image {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.blog-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

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

.blog-card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.blog-card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px;
    line-height: 1.3;
}

.blog-card-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 16px;
    flex: 1;
}

.blog-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.blog-tag {
    display: inline-block;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 12px;
    color: var(--text-secondary);
}

.blog-empty {
    text-align: center;
    padding: 80px 24px;
    color: var(--text-muted);
}

/* Blog Post */
.blog-post {
    padding-bottom: 80px;
}

.blog-post-header {
    padding: 100px 24px 60px;
    border-bottom: 1px solid var(--border-color);
}

.blog-post-header .section-container {
    max-width: 760px;
}

.blog-back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 32px;
    transition: color var(--transition-fast);
}

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

.blog-post-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.blog-post-separator {
    color: var(--border-light);
}

.blog-post-title {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 20px;
    max-width: 800px;
}

.blog-post-description {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 24px;
    max-width: 700px;
}

.blog-post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.blog-post-cover {
    padding: 40px 24px;
}

.blog-post-cover .section-container {
    max-width: 760px;
}

.blog-post-cover img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    border: 1px solid var(--border-color);
}

/* Blog Content (Markdown) */
.blog-post-content {
    padding: 60px 24px;
}

.blog-content-container {
    max-width: 760px;
}

.blog-content-container h1,
.blog-content-container h2,
.blog-content-container h3,
.blog-content-container h4,
.blog-content-container h5,
.blog-content-container h6 {
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
    margin: 48px 0 16px;
}

.blog-content-container h1:first-child,
.blog-content-container h2:first-child,
.blog-content-container h3:first-child {
    margin-top: 0;
}

.blog-content-container h1 { font-size: 36px; }
.blog-content-container h2 { font-size: 28px; border-bottom: 1px solid var(--border-color); padding-bottom: 12px; }
.blog-content-container h3 { font-size: 22px; }
.blog-content-container h4 { font-size: 18px; }

.blog-content-container p {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0 0 24px;
}

.blog-content-container a {
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: opacity var(--transition-fast);
}

.blog-content-container a:hover {
    opacity: 0.8;
}

.blog-content-container strong {
    color: var(--text-primary);
    font-weight: 600;
}

.blog-content-container ul,
.blog-content-container ol {
    margin: 0 0 24px;
    padding-left: 24px;
    color: var(--text-secondary);
}

.blog-content-container li {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 8px;
}

.blog-content-container blockquote {
    margin: 32px 0;
    padding: 20px 24px;
    border-left: 3px solid var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 0 8px 8px 0;
}

.blog-content-container blockquote p {
    margin: 0;
    font-size: 18px;
    font-style: italic;
    color: var(--text-primary);
}

.blog-content-container code {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    background: rgba(255, 255, 255, 0.08);
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--text-primary);
}

.blog-content-container pre {
    margin: 32px 0;
    padding: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow-x: auto;
}

.blog-content-container pre code {
    background: none;
    padding: 0;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.blog-content-container img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    margin: 32px 0;
    border: 1px solid var(--border-color);
}

.blog-content-container hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 48px 0;
}

/* Tables */
.blog-content-container table {
    width: 100%;
    margin: 32px 0;
    border-collapse: collapse;
    font-size: 15px;
}

.blog-content-container thead {
    background: rgba(255, 255, 255, 0.05);
}

.blog-content-container th {
    text-align: left;
    padding: 14px 16px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.blog-content-container td {
    padding: 14px 16px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.blog-content-container tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Task lists */
.blog-content-container input[type="checkbox"] {
    margin-right: 8px;
    accent-color: var(--text-primary);
}

/* ========================================
   Authentication Pages
   ======================================== */

.auth-section {
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: rgba(10, 10, 10, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h1 {
    font-size: 28px;
    font-weight: 600;
    margin: 0 0 8px 0;
    color: var(--text-primary);
}

.auth-header p {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--transition-fast);
}

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

.form-group input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.08);
}

.auth-submit {
    width: 50%;
    margin-top: 8px;
    padding: 14px 20px;
    font-size: 15px;
    border-radius: 50px;
    background: #90EE90;
    color: #333;
    border: 1px solid #7ed47e;
    margin-left: auto;
    margin-right: auto;
    display: block;
}

.auth-submit:hover {
    background: #7ed47e;
    border-color: #6bc46b;
}

.auth-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 20px;
}

.auth-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #4ade80;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 20px;
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.auth-footer p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.auth-footer a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .auth-card {
        padding: 32px 24px;
    }

    .auth-header h1 {
        font-size: 24px;
    }
}