/* ===========================================
   Speaker Shownotes - Bold Editorial Design
   Style: Exaggerated Minimalism + Swiss Modernism
   NOT generic, NOT purple, NOT AI slop
   =========================================== */

/* Typography - Bold geometric for impact */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* ===========================================
   Design Tokens - Light Theme
   =========================================== */
:root {
    /* Brand - Warm Coral/Vermillion accent (NOT purple) */
    --color-accent: #E63946;
    --color-accent-dark: #C1121F;
    --color-accent-light: #FFB4A2;

    /* Monochrome base */
    --color-black: #0A0A0A;
    --color-white: #FFFFFF;
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-300: #D4D4D4;
    --color-gray-400: #A3A3A3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;

    /* Semantic - Light theme */
    --color-background: var(--color-white);
    --color-surface: var(--color-gray-50);
    --color-surface-elevated: var(--color-white);
    --color-text-primary: var(--color-black);
    --color-text-secondary: var(--color-gray-600);
    --color-text-muted: var(--color-gray-500);
    --color-border: var(--color-gray-200);
    --color-border-strong: var(--color-black);

    /* Legacy aliases */
    --background: var(--color-background);
    --surface: var(--color-surface);
    --border-color: var(--color-border);
    --text-primary: var(--color-text-primary);
    --text-secondary: var(--color-text-secondary);
    --text-muted: var(--color-text-muted);
    --primary-color: var(--color-accent);
    --primary-dark: var(--color-accent-dark);
    --primary-light: var(--color-accent-light);

    /* Typography - Bold Geometric */
    --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
    --font-family: var(--font-body);

    /* Type scale - Bold hierarchy */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    --font-size-hero: clamp(2rem, 8vw, 5.5rem);

    /* Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing - Mathematical 8px grid */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Borders - Hard edges, no soft curves */
    --radius-none: 0;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
    --radius-full: 9999px;

    /* Shadows - Hard, offset shadows (Neubrutalist touch) */
    --shadow-sm: 2px 2px 0 var(--color-gray-200);
    --shadow-md: 4px 4px 0 var(--color-gray-200);
    --shadow-lg: 6px 6px 0 var(--color-gray-300);
    --shadow-hard: 4px 4px 0 var(--color-black);

    /* Transitions */
    --transition-fast: 100ms ease;
    --transition-base: 150ms ease;
    --transition-slow: 250ms ease;
}

/* ===========================================
   Dark Theme
   =========================================== */
[data-theme="dark"] {
    --color-background: var(--color-black);
    --color-surface: var(--color-gray-900);
    --color-surface-elevated: var(--color-gray-800);
    --color-text-primary: var(--color-white);
    --color-text-secondary: var(--color-gray-300);
    --color-text-muted: var(--color-gray-500);
    --color-border: var(--color-gray-800);
    --color-border-strong: var(--color-white);
    --color-accent-light: #E63946;

    --background: var(--color-background);
    --surface: var(--color-surface);
    --border-color: var(--color-border);
    --text-primary: var(--color-text-primary);
    --text-secondary: var(--color-text-secondary);
    --text-muted: var(--color-text-muted);

    --shadow-sm: 2px 2px 0 var(--color-gray-800);
    --shadow-md: 4px 4px 0 var(--color-gray-800);
    --shadow-lg: 6px 6px 0 var(--color-gray-700);
    --shadow-hard: 4px 4px 0 var(--color-white);
}

/* ===========================================
   Reduced Motion
   =========================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-background);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

/* Links - Accent color */
a {
    color: var(--color-accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-accent-dark);
}

/* ===========================================
   Focus States - Accessibility
   =========================================== */
:focus {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

/* ===========================================
   Skip Link
   =========================================== */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-4);
    background: var(--color-black);
    color: var(--color-white);
    padding: var(--space-3) var(--space-6);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-sm);
    text-decoration: none;
    z-index: 10000;
    border: 2px solid var(--color-white);
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: var(--space-4);
}

[data-theme="dark"] .skip-link {
    background: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-black);
}

/* ===========================================
   Layout
   =========================================== */
.wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.page-content {
    flex: 1;
    padding: var(--space-16) 0;
}

/* ===========================================
   Header - Clean, minimal
   =========================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-5) 0;
}

.site-header .wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: color var(--transition-base);
}

.site-title:hover {
    color: var(--color-accent);
}

/* Override general link styles for navigation */
.site-nav a,
.breadcrumb a,
.resources-list a {
    color: var(--color-text-secondary);
    text-decoration: none;
}

.site-nav a:hover,
.breadcrumb a:hover {
    color: var(--color-accent);
}

.resources-list a {
    color: var(--color-text-primary);
}

.resources-list a:hover {
    color: var(--color-accent);
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--space-6);
}

.site-nav a {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-2) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-base);
}

.site-nav a:hover {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

/* ===========================================
   Theme Toggle - Minimal
   =========================================== */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: color var(--transition-base);
}

.theme-toggle:hover {
    color: var(--color-text-primary);
}

.theme-toggle__icon {
    width: 20px;
    height: 20px;
}

.theme-toggle__icon--sun { display: none; }
.theme-toggle__icon--moon { display: block; }

[data-theme="dark"] .theme-toggle__icon--sun { display: block; }
[data-theme="dark"] .theme-toggle__icon--moon { display: none; }

/* ===========================================
   Hero Section - Bold editorial
   =========================================== */
.hero-section {
    --hero-bg-image: none;
    position: relative;
    background-color: var(--color-gray-200);
    background-image: var(--hero-bg-image);
    background-size: cover;
    background-position: center;
    color: var(--color-black);
    padding: var(--space-24) var(--space-6);
    text-align: center;
    margin-bottom: var(--space-24);
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.75) 0%,
        rgba(255, 255, 255, 0.85) 100%
    );
    pointer-events: none;
}

.hero-section > * {
    position: relative;
    z-index: 1;
}

/* Dark mode: keep dark overlay */
[data-theme="dark"] .hero-section {
    background-color: var(--color-black);
    color: var(--color-white);
}

[data-theme="dark"] .hero-section::before {
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.5) 0%,
        rgba(0, 0, 0, 0.7) 100%
    );
}

.hero-image {
    margin-bottom: var(--space-8);
}

.author-avatar {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    border: 3px solid var(--color-black);
    object-fit: cover;
}

[data-theme="dark"] .author-avatar {
    border-color: var(--color-white);
}

.hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.hero-content h1 {
    font-family: var(--font-display);
    font-size: var(--font-size-hero);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin: 0 0 var(--space-10) 0;
    color: var(--color-black);
    text-transform: uppercase;
}

[data-theme="dark"] .hero-content h1 {
    color: var(--color-white);
}

.hero-description {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--color-gray-700);
    margin: 0 0 var(--space-8) 0;
}

[data-theme="dark"] .hero-description {
    color: rgba(255, 255, 255, 0.85);
}

/* Hero Stats - Oversized light numbers */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-16);
    margin-bottom: var(--space-10);
    flex-wrap: wrap;
}

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

.hero-stat__number {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 300;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--color-black);
    display: block;
}

[data-theme="dark"] .hero-stat__number {
    color: var(--color-white);
}

.hero-stat__label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
    margin-top: var(--space-2);
    display: block;
}

/* Social Links */
.speaker-social-links {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
}

.speaker-social-links .social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    color: var(--color-gray-600);
    transition: color var(--transition-base);
    cursor: pointer;
}

.speaker-social-links .social-link:hover {
    color: var(--color-black);
}

[data-theme="dark"] .speaker-social-links .social-link {
    color: rgba(255, 255, 255, 0.7);
}

[data-theme="dark"] .speaker-social-links .social-link:hover {
    color: var(--color-white);
}

.speaker-social-links .social-icon {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

/* ===========================================
   Speaker Bar - Compact speaker identity row
   =========================================== */
.speaker-bar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) 0;
    margin-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-gray-200);
}

[data-theme="dark"] .speaker-bar {
    border-bottom-color: var(--color-gray-700);
}

.speaker-bar__avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    object-fit: cover;
    flex-shrink: 0;
}

.speaker-bar__info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    flex: 1;
}

.speaker-bar__name {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-black);
    line-height: 1.2;
}

.speaker-bar__info h1 {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-black);
    line-height: 1.2;
    margin: 0;
}

[data-theme="dark"] .speaker-bar__info h1 {
    color: var(--color-white);
}

[data-theme="dark"] .speaker-bar__name {
    color: var(--color-white);
}

.speaker-bar__bio {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    line-height: 1.4;
}

[data-theme="dark"] .speaker-bar__bio {
    color: var(--color-gray-400);
}

.speaker-bar__social {
    display: flex;
    gap: var(--space-1);
    flex-shrink: 0;
}

.speaker-bar__social .social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--color-gray-500);
    transition: color var(--transition-base);
}

.speaker-bar__social .social-link:hover {
    color: var(--color-black);
}

[data-theme="dark"] .speaker-bar__social .social-link {
    color: rgba(255, 255, 255, 0.6);
}

[data-theme="dark"] .speaker-bar__social .social-link:hover {
    color: var(--color-white);
}

.speaker-bar__social .social-icon {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* ===========================================
   Logo Strip - Grayscale conference logos
   =========================================== */
.logo-strip {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-16);
}

.logo-strip__label {
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--space-6);
}

.logo-strip__logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-10);
    flex-wrap: wrap;
}

.logo-strip__logo {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.6;
    transition: opacity var(--transition-base);
}

.logo-strip__logo:hover {
    opacity: 1;
}

/* ===========================================
   Home Page
   =========================================== */
.home-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

/* ===========================================
   Section Headings - Bold minimal
   =========================================== */
.featured-talks h2,
.all-talks h2 {
    font-family: var(--font-display);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    margin: 0 0 var(--space-12) 0;
    color: var(--color-text-primary);
}

/* ===========================================
   Featured Talks Grid
   =========================================== */
.featured-talks {
    margin-bottom: var(--space-16);
}

.featured-talks-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

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

/* Featured Card - Clean minimal */
.featured-talk-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: 0;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-slow);
    cursor: pointer;
}

.featured-talk-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.featured-talk-card-link {
    text-decoration: none;
    color: var(--color-text-primary);
    display: flex;
    flex-direction: column;
    height: 100%;
    cursor: pointer;
}

.featured-talk-card-link:hover {
    color: var(--color-text-primary);
}

.featured-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--color-gray-100);
    overflow: hidden;
}

.featured-thumbnail .thumbnail-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.featured-talk-card:hover .thumbnail-image {
    transform: scale(1.03);
}

.featured-info {
    padding: var(--space-8);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.featured-info h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-4) 0;
    color: var(--color-text-primary);
}

/* ===========================================
   Talk Meta - Minimal text
   =========================================== */
.talk-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    background: none;
    border: none;
    padding: 0;
}

.meta-item.status-badge.video-published {
    color: var(--color-text-primary);
    background: none;
    border: none;
    font-weight: 500;
}

[data-theme="dark"] .meta-item.status-badge.video-published {
    color: var(--color-text-secondary);
    background: none;
    border: none;
}

.meta-item.status-badge.video-pending {
    color: var(--color-text-muted);
    background: none;
    border: none;
}

/* Skill availability (feature 002): same weight and tracking as the video badge, accent underline as the tell */
.meta-item.status-badge.skill-available {
    color: var(--color-text-primary);
    background: none;
    border: none;
    border-bottom: 2px solid var(--color-accent);
    font-weight: 500;
}

[data-theme="dark"] .meta-item.status-badge.skill-available {
    color: var(--color-text-secondary);
    border-bottom-color: var(--color-accent-light);
}

.talk-summary {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ===========================================
   All Talks Section
   =========================================== */
.all-talks {
    margin-top: var(--space-24);
    padding-top: var(--space-16);
}

.talks-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* Talk List Item */
.talk-list-item {
    display: flex;
    gap: var(--space-6);
    padding: var(--space-6) 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.talk-list-item:hover {
    background: transparent;
}

.talk-list-item:last-child {
    border-bottom: none;
}

.talk-list-item-link {
    display: flex;
    gap: var(--space-6);
    text-decoration: none;
    color: var(--color-text-primary);
    width: 100%;
    cursor: pointer;
}

.talk-list-item-link:hover {
    color: var(--color-text-primary);
}

.talk-thumbnail {
    flex-shrink: 0;
    width: 160px;
    height: 90px;
    background: var(--color-gray-200);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.talk-thumbnail .thumbnail-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.talk-info h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 var(--space-2) 0;
    color: var(--color-text-primary);
    transition: color var(--transition-base);
}

.talk-list-item:hover .talk-info h3 {
    color: var(--color-accent);
}

/* ===========================================
   Empty State - Minimal
   =========================================== */
.empty-state {
    text-align: center;
    padding: var(--space-24) var(--space-8);
}

.empty-state h2 {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.empty-state p {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    max-width: 400px;
    margin: 0 auto;
}

/* ===========================================
   Breadcrumb
   =========================================== */
.breadcrumb {
    margin-bottom: var(--space-8);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    align-items: center;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    margin-left: var(--space-2);
    color: var(--color-text-muted);
}

.breadcrumb a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-base);
}

.breadcrumb a:hover {
    color: var(--color-accent);
}

/* ===========================================
   Talk Page Header
   =========================================== */
.talk-header {
    margin-bottom: var(--space-12);
    padding-bottom: var(--space-8);
    border-bottom: 3px solid var(--color-accent);
}

.talk-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 var(--space-6) 0;
    color: var(--color-text-primary);
}

.talk-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 70ch;
}

/* ===========================================
   Media Container - Slides & Video
   =========================================== */
.talk-main-content {
    margin-bottom: var(--space-12);
}

.media-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr));
    gap: var(--space-8);
}

.media-item {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    padding: var(--space-6);
}

.media-item h2 {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--space-4) 0;
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-border);
}

.embed-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    background: var(--color-gray-200);
    border: 1px solid var(--color-border);
}

.embed-container iframe,
.responsive-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* ===========================================
   Talk Resources
   =========================================== */
.talk-resources {
    margin-top: var(--space-12);
    padding: var(--space-8);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
}

.talk-resources h2 {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--space-6) 0;
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-border);
}

.resources-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.resources-list li {
    border-bottom: 1px solid var(--color-border);
}

.resources-list li:last-child {
    border-bottom: none;
}

.resources-list a {
    display: block;
    padding: var(--space-4) 0;
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-base);
}

.resources-list a:hover {
    color: var(--color-accent);
}

/* ===========================================
   Footer
   =========================================== */
.site-footer {
    margin-top: auto;
    padding: var(--space-12) 0;
    background: var(--color-background);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.site-footer p {
    margin: 0;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===========================================
   Talk Page - Skill Section (feature 002)
   =========================================== */
.talk-skill {
    margin-bottom: var(--space-12);
    padding: var(--space-8);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
}

.talk-skill__heading {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--space-4) 0;
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--color-border);
}

.talk-skill__label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.talk-skill__name {
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    overflow-wrap: anywhere;
}

.talk-skill__description {
    margin: 0 0 var(--space-6) 0;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.talk-skill__install-heading {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin: 0 0 var(--space-2) 0;
}

.talk-skill__install-label {
    margin: 0 0 var(--space-2) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* The one call-to-action on the page: hard accent shadow, everything else stays quiet */
.talk-skill__command {
    display: flex;
    align-items: stretch;
    margin: 0 0 var(--space-3) 0;
    background: var(--color-surface-elevated);
    border: 2px solid var(--color-border-strong);
    box-shadow: 4px 4px 0 var(--color-accent);
}

.talk-skill__command pre {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    padding: var(--space-4);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    color: var(--color-text-primary);
}

.talk-skill__command code {
    white-space: pre;
}

.talk-skill__copy {
    flex: 0 0 auto;
    align-self: center;
    margin: 0 var(--space-2);
    min-width: 44px;
    min-height: 44px;
    padding: 0 var(--space-3);
    font-family: var(--font-display);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text-primary);
    background: var(--color-background);
    border: 2px solid var(--color-border-strong);
    cursor: pointer;
}

.talk-skill__copy:hover,
.talk-skill__copy:focus-visible {
    color: var(--color-background);
    background: var(--color-border-strong);
}

.talk-skill__copy-status {
    min-height: 1.5em;
    margin: 0 0 var(--space-3) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.talk-skill__generic {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.talk-skill__body {
    margin-top: var(--space-6);
    padding-top: var(--space-4);
    border-top: 2px solid var(--color-border);
}

.talk-skill__summary {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-height: 44px;
    cursor: pointer;
    list-style: none;
    font-family: var(--font-display);
    font-weight: var(--font-weight-bold);
}

.talk-skill__summary::-webkit-details-marker {
    display: none;
}

.talk-skill__summary::before {
    content: "+";
    display: inline-block;
    width: 1.5rem;
    text-align: center;
    font-family: var(--font-mono);
    font-size: var(--font-size-lg);
    color: var(--color-accent);
}

.talk-skill__body[open] .talk-skill__summary::before {
    content: "\2212";
}

.talk-skill__content {
    margin-top: var(--space-4);
    line-height: 1.7;
}

.talk-skill__content h3,
.talk-skill__content h4,
.talk-skill__content h5,
.talk-skill__content h6 {
    font-family: var(--font-display);
    margin: var(--space-6) 0 var(--space-2) 0;
}

.talk-skill__content h3 {
    font-size: var(--font-size-lg);
}

.talk-skill__content h4 {
    font-size: var(--font-size-base);
}

.talk-skill__content pre {
    overflow-x: auto;
    padding: var(--space-4);
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

.talk-skill__content code {
    font-family: var(--font-mono);
}

.talk-skill__content ul,
.talk-skill__content ol {
    padding-left: var(--space-6);
}

.talk-skill__content table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    margin: var(--space-4) 0;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.talk-skill__content th,
.talk-skill__content td {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--color-border);
}

.talk-skill__content th {
    font-family: var(--font-display);
    border-bottom: 2px solid var(--color-border-strong);
}

/* ===========================================
   Responsive - Mobile First
   =========================================== */
@media (max-width: 768px) {
    .wrapper {
        padding: 0 var(--space-4);
    }

    .site-header .wrapper {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .site-title {
        font-size: var(--font-size-lg);
    }

    .speaker-bar {
        flex-wrap: wrap;
    }

    .speaker-bar__social {
        width: 100%;
        justify-content: flex-start;
    }

    .hero-section {
        padding: var(--space-12) var(--space-4);
    }

    .author-avatar {
        width: 100px;
        height: 100px;
    }

    .featured-talks-grid {
        grid-template-columns: 1fr;
    }

    .talk-list-item {
        padding: var(--space-3) 0;
    }

    .talk-list-item-link {
        gap: var(--space-3);
    }

    .talk-thumbnail {
        width: 64px;
        height: 36px;
    }

    .talk-info h3 {
        font-size: var(--font-size-sm);
        margin: 0;
    }

    .talk-info .talk-meta,
    .talk-info .talk-summary {
        display: none;
    }

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

    .talk-title {
        font-size: var(--font-size-3xl);
    }

    /* Skill section: stack the copy button under the command on phones */
    .talk-skill {
        padding: var(--space-4);
    }

    .talk-skill__command {
        flex-direction: column;
    }

    .talk-skill__copy {
        align-self: stretch;
        margin: 0 var(--space-4) var(--space-4);
    }

}

@media (max-width: 480px) {
    .site-nav ul {
        gap: var(--space-4);
    }

    .hero-stats {
        gap: var(--space-8);
    }

    .speaker-social-links .social-link {
        width: 40px;
        height: 40px;
    }

    .featured-info {
        padding: var(--space-4);
    }

    .talk-list-item {
        padding: var(--space-4);
    }

    .talk-skill__heading {
        font-size: var(--font-size-lg);
    }

    .talk-skill__name {
        font-size: var(--font-size-base);
    }

}

/* 280px extreme viewport */
@media (max-width: 320px) {
    .site-title {
        font-size: var(--font-size-base);
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
    }

    .hero-content h1 {
        font-size: var(--font-size-3xl);
    }

    .featured-talks h2,
    .all-talks h2 {
        font-size: var(--font-size-2xl);
    }
}

/* ===========================================
   Utility: Thumbnail Fallback
   =========================================== */
.thumbnail-image[src*="placeholder"] {
    object-fit: contain;
    background: var(--color-gray-100);
    padding: var(--space-4);
}

/* ===========================================
   Print Styles
   =========================================== */
@media print {
    .site-header,
    .site-footer,
    .theme-toggle {
        display: none;
    }

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