/* ============================================
   EOS — Edition d'Observation Strategique
   PWA Stylesheet
   ============================================ */

/* --- Custom Properties --- */
:root {
  /* Brand */
  --eos-gold: #D4A853;
  --eos-gold-dim: #B8913F;

  /* Category colors */
  --cat-geo: #C0392B;
  --cat-eco: #E67E22;
  --cat-pol: #2980B9;
  --cat-sci: #27AE60;
  --cat-eur: #8E44AD;

  /* Light mode (default) */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F7F4;
  --bg-card: #FFFFFF;
  --bg-card-hover: #FAFAF8;
  --text-primary: #1A1A1A;
  --text-secondary: #555555;
  --text-tertiary: #888888;
  --border-color: #E5E5E5;
  --border-light: #F0F0F0;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
  --overlay-bg: rgba(255, 255, 255, 0.95);

  /* Sizing */
  --max-width: 640px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Typography scale */
  --fs-xs: 0.75rem;
  --fs-sm: 0.8125rem;
  --fs-base: 0.9375rem;
  --fs-md: 1.0625rem;
  --fs-lg: 1.25rem;
  --fs-xl: 1.5rem;
  --fs-2xl: 2rem;
  --fs-3xl: 2.75rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark mode */
[data-theme="dark"] {
  --bg-primary: #0A0A0A;
  --bg-secondary: #111111;
  --bg-card: #151515;
  --bg-card-hover: #1A1A1A;
  --text-primary: #E8E6E1;
  --text-secondary: #A0A0A0;
  --text-tertiary: #666666;
  --border-color: #2A2A2A;
  --border-light: #1E1E1E;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.2);
  --overlay-bg: rgba(10, 10, 10, 0.95);
}

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  min-height: 100dvh;
}

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

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

/* --- App container --- */
#app {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100dvh;
}

/* --- Views --- */
.view {
  display: none;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.view.active {
  display: block;
}

.view.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Slide from right for category */
.view.slide-in {
  animation: slideIn var(--transition-slow) forwards;
}

.view.slide-out {
  animation: slideOut 200ms ease forwards;
}

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

@keyframes slideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-20px);
  }
}

/* ============================================
   MASTHEAD
   ============================================ */
.masthead {
  padding-top: calc(var(--space-2xl) + env(safe-area-inset-top, 0px));
  padding-bottom: var(--space-lg);
  text-align: center;
}

.masthead-top {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.masthead-title {
  line-height: 1;
}

.masthead-logo {
  height: 64px;
  width: auto;
  border-radius: 10px;
}

[data-theme="dark"] .masthead-logo {
  filter: invert(1);
}

.btn-icon {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color var(--transition-fast);
  color: var(--text-secondary);
}

.btn-icon:hover {
  background-color: var(--bg-secondary);
}

/* Sun/Moon toggle */
.icon-sun { display: none; }
.icon-moon { display: block; }

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

.masthead-sub {
  margin-top: var(--space-sm);
  font-size: var(--fs-sm);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.edition-separator {
  margin: 0 var(--space-xs);
  color: var(--eos-gold);
}

.masthead-rule {
  margin-top: var(--space-lg);
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--eos-gold) 20%,
    var(--eos-gold) 80%,
    transparent
  );
  opacity: 0.5;
}

/* ============================================
   HOME GRID — Category Tiles
   ============================================ */
.home-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
}

.tile {
  position: relative;
  border-radius: 6px;
  padding: var(--space-lg) var(--space-md);
  cursor: pointer;
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-fast);
  border: 1px solid var(--border-light);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-card);
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.tile:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.tile:active {
  transform: translateY(0);
}

/* Full-width Europe tile */
.tile--full {
  grid-column: 1 / -1;
  min-height: 90px;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
}

.tile-accent {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
}

.tile--full .tile-accent {
  width: 3px;
  height: 100%;
}

.tile-label {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: var(--fs-base);
  line-height: 1.3;
  color: var(--text-primary);
}

.tile-count {
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: var(--space-sm);
}

.tile--full .tile-count {
  margin-top: 0;
  margin-left: auto;
}

/* ============================================
   CATEGORY VIEW
   ============================================ */
.category-header {
  padding-top: calc(var(--space-lg) + env(safe-area-inset-top, 0px));
  padding-bottom: var(--space-md);
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}

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

.category-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: var(--fs-xl);
  line-height: 1.25;
  margin-top: var(--space-sm);
  color: var(--text-primary);
}

.category-rule {
  margin-top: var(--space-md);
  height: 3px;
  border-radius: 2px;
}

/* ============================================
   ARTICLE LIST
   ============================================ */
.article-list {
  padding: var(--space-md) 0 var(--space-2xl);
}

.article-item {
  display: block;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border-light);
  cursor: pointer;
  transition: opacity var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.article-item:first-child {
  padding-top: var(--space-md);
}

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

.article-item:hover {
  opacity: 0.8;
}

.article-item:active {
  opacity: 0.6;
}

.article-number {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 400;
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  margin-bottom: var(--space-xs);
  display: block;
}

.article-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 600;
  font-size: var(--fs-md);
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

/* --- Editorial block (full synthesis) --- */
.editorial-block {
  background: var(--surface-elevated);
  border-left: 3px solid var(--eos-gold);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.editorial-label {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--eos-gold);
  margin-bottom: var(--space-xs);
}

.editorial-title {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.editorial-content {
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  white-space: pre-line;
}

.editorial-sources {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  font-style: italic;
}

.article-summary {
  font-size: var(--fs-sm);
  line-height: 1.55;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
}

.article-source {
  font-weight: 500;
}

.article-flag {
  font-size: var(--fs-sm);
}

.article-tension {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.tension-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
}

.tension-bar {
  width: 48px;
  height: 4px;
  border-radius: 2px;
  background-color: var(--border-color);
  overflow: hidden;
  position: relative;
}

.tension-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  border-radius: 2px;
  transition: width var(--transition-slow);
}

/* Tension colors */
.tension-low { background-color: #27AE60; }
.tension-mid { background-color: #E67E22; }
.tension-high { background-color: #C0392B; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  padding: var(--space-xl) 0;
  padding-bottom: calc(var(--space-xl) + env(safe-area-inset-bottom, 0px));
  text-align: center;
  border-top: 1px solid var(--border-light);
}

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

.footer-separator {
  color: var(--text-tertiary);
}

.btn-soutenir {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--eos-gold);
  border: 1.5px solid var(--eos-gold);
  border-radius: 4px;
  padding: var(--space-sm) var(--space-lg);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.btn-soutenir:hover {
  background-color: var(--eos-gold);
  color: #FFFFFF;
}

[data-theme="dark"] .btn-soutenir:hover {
  color: #0A0A0A;
}

.footer-powered {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.footer-powered-label {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-logo-vox {
  height: 48px;
  width: 48px;
  border-radius: 8px;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-logo-vox:hover {
  opacity: 1;
}

.footer-link {
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--eos-gold);
}

.footer-legal {
  margin-top: var(--space-sm);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
}

.footer-legal a {
  color: var(--text-tertiary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-legal a:hover {
  color: var(--eos-gold);
}

.category-footer {
  margin-top: var(--space-lg);
}

/* ============================================
   OFFLINE NOTICE
   ============================================ */
.offline-notice {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--eos-gold);
  color: #1A1A1A;
  text-align: center;
  padding: var(--space-sm) var(--space-md);
  padding-bottom: calc(var(--space-sm) + env(safe-area-inset-bottom, 0px));
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.03em;
  z-index: 100;
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.offline-notice.show {
  transform: translateY(0);
}

/* ============================================
   LOADING
   ============================================ */
.loading-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-primary);
  z-index: 200;
  transition: opacity var(--transition-slow);
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.loading-spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border-color);
  border-top-color: var(--eos-gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  margin-top: var(--space-md);
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
}

.empty-state-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: var(--fs-lg);
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.empty-state-text {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================
   EDITION SELECTOR
   ============================================ */
.edition-selector {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  margin-bottom: var(--space-sm);
}

.edition-btn {
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: var(--space-sm) var(--space-lg);
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.edition-btn:hover {
  border-color: var(--eos-gold-dim);
  color: var(--text-primary);
}

.edition-btn.active {
  background: var(--bg-card);
  color: var(--eos-gold);
  border-color: var(--eos-gold);
  font-weight: 600;
  box-shadow: 0 2px 0 0 var(--eos-gold);
}

.edition-btn.locked {
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  border-color: var(--border-light);
  opacity: 0.7;
}

.edition-btn.locked:hover {
  opacity: 0.9;
  border-color: var(--eos-gold-dim);
}

/* ============================================
   USER INDICATOR
   ============================================ */
.user-indicator {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--eos-gold);
  color: #FFFFFF;
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: var(--fs-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
  border: none;
  line-height: 1;
}

[data-theme="dark"] .user-indicator {
  color: #0A0A0A;
}

.user-indicator:hover {
  box-shadow: 0 0 0 3px rgba(212, 168, 83, 0.3);
  transform: translateY(-50%) scale(1.05);
}

/* ============================================
   PREMIUM OVERLAY
   ============================================ */
.premium-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-base);
  padding: var(--space-md);
}

.premium-overlay.visible {
  opacity: 1;
}

[data-theme="dark"] .premium-overlay {
  background: rgba(0, 0, 0, 0.75);
}

.premium-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 4px 16px rgba(0, 0, 0, 0.1);
  border-top: 3px solid var(--eos-gold);
  transform: translateY(16px) scale(0.97);
  transition: transform var(--transition-slow);
}

.premium-overlay.visible .premium-card {
  transform: translateY(0) scale(1);
}

[data-theme="dark"] .premium-card {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 4px 16px rgba(0, 0, 0, 0.3);
}

.premium-card-inner {
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.premium-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 900;
  font-size: var(--fs-2xl);
  letter-spacing: 0.1em;
  color: var(--eos-gold);
  margin-bottom: var(--space-xs);
}

.premium-edition-label {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 600;
  font-size: var(--fs-lg);
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
}

.premium-text {
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 300px;
}

.premium-subtext {
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-sm);
  line-height: 1.5;
}

.premium-divider {
  width: 48px;
  height: 1px;
  background: var(--border-color);
  margin: var(--space-lg) 0;
}

.premium-btn {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 12px 32px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--eos-gold);
  color: #FFFFFF;
  text-decoration: none;
}

[data-theme="dark"] .premium-btn {
  color: #0A0A0A;
}

.premium-btn:hover {
  background: var(--eos-gold-dim);
  box-shadow: 0 4px 12px rgba(212, 168, 83, 0.3);
  transform: translateY(-1px);
}

.premium-btn:active {
  transform: translateY(0);
}

.premium-btn-manage {
  background: transparent;
  color: var(--eos-gold);
  border: 1.5px solid var(--eos-gold);
}

.premium-btn-manage:hover {
  background: var(--eos-gold);
  color: #FFFFFF;
}

[data-theme="dark"] .premium-btn-manage {
  color: var(--eos-gold);
}

[data-theme="dark"] .premium-btn-manage:hover {
  color: #0A0A0A;
}

.premium-btn-google {
  margin: var(--space-sm) 0;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.premium-btn-link {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm) var(--space-md);
  margin-top: var(--space-md);
  transition: color var(--transition-fast);
  text-decoration: none;
}

.premium-btn-link:hover {
  color: var(--text-secondary);
}

.premium-btn-logout {
  color: #C0392B;
}

.premium-btn-logout:hover {
  color: #E74C3C;
}

.premium-user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--eos-gold);
  color: #FFFFFF;
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 700;
  font-size: var(--fs-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  line-height: 1;
}

[data-theme="dark"] .premium-user-avatar {
  color: #0A0A0A;
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Small phones */
@media (max-width: 360px) {
  :root {
    --fs-3xl: 2.25rem;
    --fs-xl: 1.25rem;
  }

  .home-grid {
    gap: var(--space-sm);
  }

  .tile {
    padding: var(--space-md) var(--space-sm);
    min-height: 100px;
  }
}

/* Tablets and larger */
@media (min-width: 640px) {
  :root {
    --fs-3xl: 3.25rem;
  }

  .view {
    padding: 0 var(--space-lg);
  }

  .tile {
    min-height: 140px;
    padding: var(--space-xl) var(--space-lg);
  }

  .tile-label {
    font-size: var(--fs-md);
  }

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

/* Desktop — cap width, center content */
@media (min-width: 768px) {
  .masthead {
    padding-top: var(--space-2xl);
  }

  .category-header {
    padding-top: var(--space-xl);
  }
}

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