/* ═══════════════════════════════════════════════════════
   GRIMOIRE — Design System & Core Styles
   A premium editorial platform for ideas and research
   ═══════════════════════════════════════════════════════ */

/* ── Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;0,700;1,300;1,400;1,500&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;1,8..60,300;1,8..60,400;1,8..60,500&family=JetBrains+Mono:wght@400;500&family=Noto+Serif+JP:wght@400;500;700&display=swap');

/* ── Custom Properties: Dark Theme (default) ─────── */
:root {
  /* Typography */
  --font-display: 'Cormorant Garamond', 'Noto Serif JP', Georgia, serif;
  --font-body: 'Source Serif 4', 'Noto Serif JP', Georgia, serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-ui: 'Source Serif 4', sans-serif;

  /* Type Scale (major third — 1.25) */
  --text-xs: clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --text-sm: clamp(0.8rem, 0.75rem + 0.3vw, 0.9rem);
  --text-base: clamp(1rem, 0.92rem + 0.4vw, 1.125rem);
  --text-lg: clamp(1.15rem, 1.05rem + 0.5vw, 1.3rem);
  --text-xl: clamp(1.35rem, 1.2rem + 0.75vw, 1.6rem);
  --text-2xl: clamp(1.6rem, 1.35rem + 1.25vw, 2.1rem);
  --text-3xl: clamp(2rem, 1.6rem + 2vw, 2.8rem);
  --text-4xl: clamp(2.5rem, 1.9rem + 3vw, 3.8rem);
  --text-5xl: clamp(3rem, 2.2rem + 4vw, 5rem);
  --text-hero: clamp(3.5rem, 2.5rem + 5vw, 7rem);

  /* Line Heights */
  --leading-tight: 1.1;
  --leading-snug: 1.25;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --content-width: 42rem;
  --wide-width: 62rem;
  --max-width: 80rem;
  --sidebar-width: 14rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 600ms;
  --duration-glacial: 1200ms;

  /* Z-Index Scale */
  --z-base: 1;
  --z-above: 10;
  --z-nav: 100;
  --z-overlay: 1000;
  --z-modal: 10000;
}

/* ── Dark Theme Colors ─────────────────────────────── */
[data-theme="dark"], :root {
  --color-bg: #0a0a0f;
  --color-bg-warm: #0d0c11;
  --color-surface: #14141f;
  --color-surface-raised: #1a1a28;
  --color-surface-hover: #1f1f30;
  --color-border: rgba(212, 165, 116, 0.08);
  --color-border-subtle: rgba(255, 255, 255, 0.04);
  --color-text: #e8e6e3;
  --color-text-secondary: #a8a5a0;
  --color-text-muted: #6b6b7b;
  --color-accent: #d4a574;
  --color-accent-dim: rgba(212, 165, 116, 0.15);
  --color-accent-hover: #e0b688;
  --color-accent-secondary: #8b7355;
  --color-highlight: rgba(212, 165, 116, 0.08);

  /* Decorative */
  --grain-opacity: 0.03;
  --glow-color: rgba(212, 165, 116, 0.06);
  --shadow-color: rgba(0, 0, 0, 0.4);
  --vignette: radial-gradient(ellipse at center, transparent 50%, rgba(0, 0, 0, 0.4) 100%);
}

/* ── Light Theme Colors ────────────────────────────── */
[data-theme="light"] {
  --color-bg: #faf8f5;
  --color-bg-warm: #f5f0ea;
  --color-surface: #ffffff;
  --color-surface-raised: #ffffff;
  --color-surface-hover: #f0ece6;
  --color-border: rgba(139, 94, 60, 0.12);
  --color-border-subtle: rgba(0, 0, 0, 0.06);
  --color-text: #1a1a2e;
  --color-text-secondary: #4a4a5a;
  --color-text-muted: #8a8a96;
  --color-accent: #8b5e3c;
  --color-accent-dim: rgba(139, 94, 60, 0.1);
  --color-accent-hover: #6b4226;
  --color-accent-secondary: #6b4226;
  --color-highlight: rgba(139, 94, 60, 0.06);

  --grain-opacity: 0.015;
  --glow-color: rgba(139, 94, 60, 0.04);
  --shadow-color: rgba(0, 0, 0, 0.08);
  --vignette: radial-gradient(ellipse at center, transparent 60%, rgba(0, 0, 0, 0.06) 100%);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  hanging-punctuation: first last;
  /* Prevent horizontal overflow on mobile */
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--duration-slow) var(--ease-out),
              color var(--duration-slow) var(--ease-out);
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
  /* Disable tap highlight on mobile */
  -webkit-tap-highlight-color: transparent;
  /* Prevent pull-to-refresh in standalone PWA */
  overscroll-behavior-y: contain;
}

/* Film grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  opacity: var(--grain-opacity);
  pointer-events: none;
  z-index: var(--z-modal);
  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");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* Vignette */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: var(--vignette);
  pointer-events: none;
  z-index: calc(var(--z-nav) - 1);
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

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

/* ── Navigation ────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-lg) var(--space-xl);
  padding-top: calc(var(--space-lg) + env(safe-area-inset-top, 0px));
  padding-left: calc(var(--space-xl) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--space-xl) + env(safe-area-inset-right, 0px));
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--duration-normal) var(--ease-out);
  mix-blend-mode: difference;
}

.site-nav.scrolled {
  mix-blend-mode: normal;
  background: rgba(10, 10, 15, 0.95);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-xl);
  padding-top: calc(var(--space-md) + env(safe-area-inset-top, 0px));
  padding-left: calc(var(--space-xl) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--space-xl) + env(safe-area-inset-right, 0px));
}

@supports (backdrop-filter: blur(1px)) {
  .site-nav.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px) saturate(1.4);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
  }
}

[data-theme="light"] .site-nav.scrolled {
  background: rgba(250, 248, 245, 0.95);
}

@supports (backdrop-filter: blur(1px)) {
  [data-theme="light"] .site-nav.scrolled {
    background: rgba(250, 248, 245, 0.85);
  }
}

.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-logo span {
  font-weight: 300;
  opacity: 0.5;
  font-size: 0.7em;
  margin-left: 0.5em;
  letter-spacing: 0.15em;
}

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

/* Theme Toggle */
.theme-toggle {
  position: relative;
  width: 44px;
  height: 24px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
  outline: none;
}

.theme-toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #e8e6e3;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.theme-toggle[aria-pressed="true"]::after {
  transform: translateX(20px);
  background: #1a1a2e;
}

.theme-toggle:hover {
  border-color: rgba(255, 255, 255, 0.3);
}

/* ── Hero Section ──────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  padding-top: calc(var(--space-4xl) + env(safe-area-inset-top, 0px));
  padding-bottom: calc(var(--space-4xl) + env(safe-area-inset-bottom, 0px));
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
  pointer-events: none;
}

.hero-ornament {
  position: absolute;
  opacity: 0.04;
  font-family: var(--font-display);
  font-size: 20vw;
  font-weight: 300;
  color: var(--color-accent);
  user-select: none;
  pointer-events: none;
  line-height: 1;
}

.hero-ornament--top { top: 5%; right: -5%; }
.hero-ornament--bottom { bottom: 5%; left: -5%; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

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

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 300;
  line-height: var(--leading-tight);
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s var(--ease-out) 0.4s both;
}

.hero-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--color-accent);
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 300;
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-sm);
  animation: fadeInUp 0.8s var(--ease-out) 0.6s both;
}

.hero-subtitle-jp {
  font-family: 'Noto Serif JP', serif;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.3em;
  margin-bottom: var(--space-3xl);
  animation: fadeInUp 0.8s var(--ease-out) 0.7s both;
}

.hero-divider {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.8s var(--ease-out) 0.8s both;
}

.hero-description {
  max-width: 32rem;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  animation: fadeInUp 0.8s var(--ease-out) 0.9s both;
}

.hero-scroll-hint {
  position: absolute;
  bottom: calc(var(--space-2xl) + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: fadeInUp 0.8s var(--ease-out) 1.2s both;
}

.hero-scroll-hint::after {
  content: '';
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollLine 2s var(--ease-in-out) infinite;
}

/* ── Section Headers ───────────────────────────────── */
.section-header {
  text-align: center;
  padding: var(--space-5xl) var(--space-xl) var(--space-3xl);
}

.section-label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: var(--leading-tight);
  color: var(--color-text);
}

/* ── Article Cards Grid ────────────────────────────── */
.articles-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl) var(--space-5xl);
  display: grid;
  gap: var(--space-2xl);
}

/* First card is featured (full width) */
.articles-grid .article-card:first-child {
  grid-column: 1 / -1;
}

.articles-grid .article-card:first-child .card-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 0;
  min-height: 480px;
}

.articles-grid .article-card:first-child .card-image {
  aspect-ratio: auto;
  min-height: 100%;
}

.articles-grid .article-card:first-child .card-content {
  padding: var(--space-3xl);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.articles-grid .article-card:first-child .card-title {
  font-size: var(--text-3xl);
}

.articles-grid .article-card:first-child .card-excerpt {
  font-size: var(--text-lg);
  -webkit-line-clamp: 4;
}

@media (min-width: 768px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .articles-grid .article-card:first-child .card-inner {
    grid-template-columns: 1fr;
  }
  .articles-grid .article-card:first-child .card-image {
    aspect-ratio: 16 / 9;
    min-height: auto;
  }
}

/* ── Article Card ──────────────────────────────────── */
.article-card {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.article-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.card-inner {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  overflow: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
}

.card-inner:hover {
  border-color: var(--color-accent-dim);
  box-shadow: 0 20px 60px -10px var(--shadow-color),
              0 0 0 1px var(--color-accent-dim);
  transform: translateY(-4px);
}

.card-image {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-surface-raised);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.card-inner:hover .card-image img {
  transform: scale(1.04);
}

.card-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--color-surface) 0%, transparent 40%);
  opacity: 0.5;
}

.card-category {
  position: absolute;
  top: var(--space-lg);
  left: var(--space-lg);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(10px);
  padding: var(--space-xs) var(--space-md);
  border-radius: 2px;
  z-index: var(--z-base);
}

[data-theme="light"] .card-category {
  background: rgba(255, 255, 255, 0.85);
}

.card-content {
  padding: var(--space-xl) var(--space-xl) var(--space-2xl);
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.card-meta-divider {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-muted);
  opacity: 0.5;
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: var(--leading-snug);
  color: var(--color-text);
  margin-bottom: var(--space-md);
  transition: color var(--duration-fast) var(--ease-out);
}

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

.card-excerpt {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

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

.card-read-more {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: gap var(--duration-normal) var(--ease-out);
}

.card-inner:hover .card-read-more {
  gap: var(--space-md);
}

.card-read-more svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-normal) var(--ease-out);
}

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

.card-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 300;
  color: var(--color-border);
  line-height: 1;
}

/* ── Empty State (placeholder card) ────────────────── */
.card-placeholder {
  border: 1px dashed var(--color-border);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  padding: var(--space-2xl);
  text-align: center;
}

/* ── Footer ────────────────────────────────────────── */
.site-footer {
  position: relative;
  padding: var(--space-4xl) var(--space-xl) var(--space-2xl);
  padding-bottom: calc(var(--space-2xl) + env(safe-area-inset-bottom, 0px));
  padding-left: calc(var(--space-xl) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--space-xl) + env(safe-area-inset-right, 0px));
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  list-style: none;
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  transition: color var(--duration-fast) var(--ease-out);
  /* Ensure 44px touch target on mobile */
  padding: var(--space-sm) var(--space-md);
  margin: calc(var(--space-sm) * -1) calc(var(--space-md) * -1);
}

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

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  opacity: 0.6;
}

.footer-divider {
  width: 40px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent-secondary), transparent);
  margin: 0 auto var(--space-xl);
}

/* ── Animations ────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 1;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
  51% {
    transform: scaleY(1);
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0;
  }
}

/* ── Utilities ─────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 767px) {
  .site-nav {
    padding: var(--space-md) var(--space-md);
    padding-top: calc(var(--space-md) + env(safe-area-inset-top, 0px));
    padding-left: calc(var(--space-md) + env(safe-area-inset-left, 0px));
    padding-right: calc(var(--space-md) + env(safe-area-inset-right, 0px));
  }

  .site-nav.scrolled {
    padding: var(--space-sm) var(--space-md);
    padding-top: calc(var(--space-sm) + env(safe-area-inset-top, 0px));
    padding-left: calc(var(--space-md) + env(safe-area-inset-left, 0px));
    padding-right: calc(var(--space-md) + env(safe-area-inset-right, 0px));
  }

  .nav-logo {
    font-size: var(--text-lg);
  }

  .nav-logo span {
    display: none;
  }

  .hero {
    padding: var(--space-3xl) var(--space-md);
    padding-top: calc(var(--space-3xl) + env(safe-area-inset-top, 0px));
    min-height: 100dvh;
  }

  .hero-description {
    font-size: var(--text-sm);
  }

  .articles-grid {
    padding: 0 calc(var(--space-md) + env(safe-area-inset-right, 0px)) var(--space-3xl) calc(var(--space-md) + env(safe-area-inset-left, 0px));
    gap: var(--space-xl);
  }

  .card-content {
    padding: var(--space-lg);
  }

  .articles-grid .article-card:first-child .card-content {
    padding: var(--space-xl);
  }

  .articles-grid .article-card:first-child .card-title {
    font-size: var(--text-2xl);
  }

  /* Ensure touch targets are at least 44px via invisible hit area */
  .theme-toggle {
    position: relative;
  }
  .theme-toggle::before {
    content: '';
    position: absolute;
    inset: -10px -0px;
  }
}

/* ── Standalone PWA mode ──────────────────────────── */
@media (display-mode: standalone) {
  /* Extra top padding when running as installed app */
  .site-nav {
    padding-top: calc(var(--space-lg) + env(safe-area-inset-top, 0px));
  }

  .site-nav.scrolled {
    padding-top: calc(var(--space-md) + env(safe-area-inset-top, 0px));
  }

  /* Prevent overscroll bounce */
  body {
    overscroll-behavior: none;
  }
}

/* ── Print ─────────────────────────────────────────── */
@media print {
  body::before,
  body::after,
  .site-nav,
  .theme-toggle,
  .hero-scroll-hint {
    display: none !important;
  }

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