/* ============================================
   Plan B Network - Dev Masterclasses 2026
   Design System Implementation
   ============================================ */

/* Fonts */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---- CSS Variables ---- */
:root {
    /* Primary Brand */
    --planb-orange: #FF5C00;
    --bitcoin-orange: #F7931A;
    --planb-black: #000000;
    --planb-white: #FFFFFF;

    /* Dark Theme */
    --color-bg: #0D1117;
    --color-bg-card: #161B22;
    --color-bg-elevated: #21262D;
    --color-bg-hover: #30363D;
    --color-text: #C9D1D9;
    --color-text-muted: #8B949E;
    --color-text-bright: #F0F6FC;
    --color-border: #30363D;

    /* Semantic */
    --color-success: #238636;
    --color-warning: #9E6A03;
    --color-danger: #DA3633;
    --color-info: #58A6FF;

    /* Orange Scale */
    --orange-50: #FFEEE5;
    --orange-100: #FFD1B7;
    --orange-200: #FFB48A;
    --orange-300: #FF975C;
    --orange-400: #FF792E;
    --orange-500: #FF5C00;
    --orange-600: #D64D00;
    --orange-700: #AD3F00;
    --orange-800: #853000;
    --orange-900: #5C2100;
    --orange-950: #210C00;

    /* Blue Scale */
    --blue-500: #0A69DA;
    --blue-400: #2483F5;

    /* Green Scale */
    --green-500: #1DB11D;
    --green-400: #37CC37;

    /* Purple Scale */
    --purple-500: #D26FF9;
    --purple-400: #DA87FA;
    --purple-600: #B05DD1;

    /* Typography */
    --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(247, 147, 26, 0.3);
    --shadow-glow-strong: 0 0 40px rgba(255, 92, 0, 0.25);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layer colors (for masterclass progression) */
    --layer-0: #58A6FF;
    --layer-1: #F7931A;
    --layer-2: #D26FF9;
    --layer-2-5: #FF5C00;
    --layer-sidechain: #1DB11D;
    --layer-ark: #2483F5;
    --layer-ecash: #37CC37;
    --layer-rgb: #DA87FA;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

a {
    color: var(--orange-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--orange-300);
    text-decoration: underline;
}

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

/* ---- Container ---- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.container-narrow {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* ---- Header ---- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    max-width: 1280px;
    margin: 0 auto;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
    color: var(--color-text-bright);
}

.header-logo:hover {
    text-decoration: none;
    color: var(--color-text-bright);
}

.header-logo img {
    height: 32px;
}

.header-logo-divider {
    width: 1px;
    height: 24px;
    background: var(--color-border);
}

.header-logo-subtitle {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
    text-decoration: none;
}

.nav-link.active {
    color: var(--orange-500);
    background: rgba(255, 92, 0, 0.1);
}

.nav-link i {
    font-size: 0.8rem;
}

/* ---- Hero Section ---- */
.hero {
    position: relative;
    padding: var(--space-3xl) 0;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 140%;
    height: 200%;
    background: radial-gradient(ellipse at 30% 20%, rgba(255, 92, 0, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 70% 80%, rgba(247, 147, 26, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 92, 0, 0.1);
    border: 1px solid rgba(255, 92, 0, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--orange-400);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-text-bright);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--planb-orange), var(--bitcoin-orange));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 700px;
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.hero-stat {
    display: flex;
    flex-direction: column;
}

.hero-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--orange-500);
    font-family: var(--font-mono);
}

.hero-stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ---- Section ---- */
.section {
    padding: var(--space-3xl) 0;
}

.section-header {
    margin-bottom: var(--space-2xl);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--orange-500);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: var(--space-sm);
}

.section-description {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 700px;
}

/* ---- Speaker Cards (Index Page) ---- */
.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-xl);
}

.speaker-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    text-decoration: none;
    color: inherit;
}

.speaker-card:hover {
    border-color: var(--orange-500);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    text-decoration: none;
    color: inherit;
}

/* Card image banner */
.speaker-card-image {
    position: relative;
    width: 100%;
}

.speaker-card-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to bottom, transparent, var(--color-bg-card));
    pointer-events: none;
}

.speaker-card-image img {
    width: 100%;
    display: block;
}

.speaker-card-header {
    padding: var(--space-md) var(--space-lg) 0;
}

.speaker-card-info {
    flex: 1;
    min-width: 0;
}

.speaker-card-number {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
}

.speaker-card-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: var(--space-xs);
}

.speaker-card-role {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.speaker-card-topic {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid;
}

.speaker-card-body {
    padding: 0 var(--space-lg) var(--space-lg);
    flex: 1;
}

.speaker-card-excerpt {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.speaker-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.speaker-card-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.speaker-card-cta {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--orange-500);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.speaker-card:hover .speaker-card-cta {
    gap: var(--space-sm);
}

/* ---- Layer Timeline (About Page) ---- */
.layer-timeline {
    position: relative;
    padding-left: 60px;
}

.layer-timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom,
        var(--layer-1),
        var(--layer-0),
        var(--layer-2),
        var(--layer-2-5),
        var(--layer-sidechain),
        var(--layer-ark),
        var(--layer-ecash),
        var(--layer-rgb)
    );
}

.layer-item {
    position: relative;
    margin-bottom: var(--space-2xl);
}

.layer-dot {
    position: absolute;
    left: -42px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 3px solid var(--color-bg);
}

.layer-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.layer-label {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.layer-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: var(--space-sm);
}

.layer-description {
    font-size: 0.925rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.layer-speaker-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition-fast);
}

.layer-speaker-link:hover {
    border-color: var(--orange-500);
    color: var(--orange-400);
    text-decoration: none;
}

/* ---- Speaker Detail Page ---- */
.speaker-hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
    border-bottom: 1px solid var(--color-border);
}

.speaker-hero-content {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2xl);
}

/* Hero landscape image */
.speaker-hero-image {
    max-width: 480px;
    width: 100%;
    flex-shrink: 0;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.speaker-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.speaker-hero-info {
    flex: 1;
}

.speaker-hero-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.speaker-hero-name {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: var(--space-sm);
}

.speaker-hero-role {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.speaker-social-links {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    color: var(--color-text);
    transition: var(--transition-fast);
}

.social-link:hover {
    border-color: var(--orange-500);
    color: var(--orange-400);
    text-decoration: none;
}

/* Speaker page navigation */
.speaker-nav {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.speaker-nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    white-space: nowrap;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
    border: none;
    background: none;
    cursor: pointer;
    font-family: var(--font-sans);
}

.speaker-nav-link:hover {
    color: var(--color-text);
    background: var(--color-bg-hover);
    text-decoration: none;
}

.speaker-nav-link.active {
    color: var(--orange-500);
    background: rgba(255, 92, 0, 0.1);
}

/* Tab content: hide inactive sections */
.speaker-content .content-section {
    display: none;
}

.speaker-content .content-section.active {
    display: block;
}

/* Speaker content sections */
.speaker-content {
    padding: var(--space-2xl) 0;
}

.content-section {
    margin-bottom: var(--space-2xl);
}

.content-section-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text-bright);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

.content-section-title i {
    color: var(--orange-500);
}

.content-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
}

.content-text p {
    margin-bottom: var(--space-md);
}

.content-text ul, .content-text ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-xl);
}

.content-text li {
    margin-bottom: var(--space-sm);
}

.content-text strong {
    color: var(--color-text-bright);
}

/* Resource cards */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-md);
}

.resource-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.resource-card:hover {
    border-color: var(--orange-500);
    text-decoration: none;
}

.resource-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1rem;
}

.resource-icon.github { background: rgba(88, 166, 255, 0.1); color: var(--color-info); }
.resource-icon.doc { background: rgba(29, 177, 29, 0.1); color: var(--green-400); }
.resource-icon.video { background: rgba(255, 92, 0, 0.1); color: var(--orange-400); }
.resource-icon.website { background: rgba(210, 111, 249, 0.1); color: var(--purple-400); }
.resource-icon.book { background: rgba(247, 147, 26, 0.1); color: var(--bitcoin-orange); }

.resource-info {
    flex: 1;
    min-width: 0;
}

.resource-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-bright);
    margin-bottom: 2px;
}

.resource-description {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Key facts sidebar */
.key-facts {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.key-facts-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.key-fact {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.key-fact:last-child {
    border-bottom: none;
}

.key-fact-icon {
    color: var(--orange-500);
    font-size: 0.8rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.key-fact-content {
    flex: 1;
}

.key-fact-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.key-fact-value {
    font-size: 0.9rem;
    color: var(--color-text-bright);
    font-weight: 500;
}

/* Two column layout */
.two-col {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: var(--space-2xl);
    align-items: start;
}

/* ---- Badges ---- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-orange { background: rgba(255, 92, 0, 0.15); color: var(--orange-400); border: 1px solid rgba(255, 92, 0, 0.3); }
.badge-blue { background: rgba(88, 166, 255, 0.15); color: var(--color-info); border: 1px solid rgba(88, 166, 255, 0.3); }
.badge-green { background: rgba(29, 177, 29, 0.15); color: var(--green-400); border: 1px solid rgba(29, 177, 29, 0.3); }
.badge-purple { background: rgba(210, 111, 249, 0.15); color: var(--purple-400); border: 1px solid rgba(210, 111, 249, 0.3); }

/* ---- Masterclass Info Card ---- */
.mc-info-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.mc-info-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.mc-info-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.mc-info-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-bright);
}

.mc-info-subtitle {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.mc-info-body {
    padding: var(--space-lg);
}

.mc-info-body p {
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

/* Prev/Next speaker navigation */
.speaker-pagination {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--color-border);
}

.pagination-link {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
    text-decoration: none;
}

.pagination-link:hover {
    border-color: var(--orange-500);
    text-decoration: none;
}

.pagination-link.next {
    text-align: right;
}

.pagination-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pagination-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-bright);
}

.pagination-speaker {
    font-size: 0.85rem;
    color: var(--orange-400);
}

/* ---- Footer ---- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) 0;
    margin-top: var(--space-3xl);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.footer-brand img {
    height: 24px;
    opacity: 0.6;
}

.footer-text {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-link {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--orange-400);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .two-col {
        grid-template-columns: 1fr;
    }
}

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

    .header-content {
        padding: var(--space-md);
    }

    .hero {
        padding: var(--space-2xl) 0;
    }

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

    .speaker-hero-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .speaker-hero-image {
        max-width: 100%;
    }

    .speaker-social-links {
        justify-content: center;
    }

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

    .speaker-pagination {
        grid-template-columns: 1fr;
    }

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

    .header-nav {
        display: none;
    }

    .layer-timeline {
        padding-left: 40px;
    }

    .layer-timeline::before {
        left: 14px;
    }

    .layer-dot {
        left: -32px;
    }
}

/* ---- Utility ---- */
.text-orange { color: var(--orange-500); }
.text-muted { color: var(--color-text-muted); }
.text-bright { color: var(--color-text-bright); }
.font-mono { font-family: var(--font-mono); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }