@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  /* Dark Mode Defaults */
  --bg-gradient: radial-gradient(circle at 50% 0%, #1e1b4b 0%, #0f172a 50%, #020617 100%);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-backdrop: blur(16px);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #cbd5e1;
  --toggle-bg: rgba(255, 255, 255, 0.06);
  --toggle-border: rgba(255, 255, 255, 0.12);
  --toggle-text: #e2e8f0;
  --toggle-hover: rgba(255, 255, 255, 0.12);
  --badge-bg: rgba(255, 255, 255, 0.05);

  /* Service Colors & Glows */
  --plex-color: #e5a00d;
  --plex-glow: rgba(229, 160, 13, 0.35);
  
  --jellyfin-color: #aa5cc3;
  --jellyfin-glow: rgba(170, 92, 195, 0.35);
  
  --seer-color: #3b82f6;
  --seer-glow: rgba(59, 130, 246, 0.35);

  --abs-color: #d97706;
  --abs-glow: rgba(217, 119, 6, 0.35);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg-gradient: radial-gradient(circle at 50% 0%, #e0e7ff 0%, #f1f5f9 50%, #e2e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.65);
    --card-border: rgba(255, 255, 255, 0.9);
    --card-backdrop: blur(16px);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-sub: #475569;
    --toggle-bg: rgba(15, 23, 42, 0.06);
    --toggle-border: rgba(15, 23, 42, 0.12);
    --toggle-text: #334155;
    --toggle-hover: rgba(15, 23, 42, 0.12);
    --badge-bg: rgba(15, 23, 42, 0.04);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100dvh;
  overflow: hidden;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

/* Header & Language Bar */
.top-bar {
  width: 100%;
  max-width: 1300px;
  padding: 1.5rem 2rem 0.75rem;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  z-index: 10;
}

.lang-toggle {
  background: var(--toggle-bg);
  border: 1px solid var(--toggle-border);
  color: var(--toggle-text);
  padding: 0.45rem 0.9rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  backdrop-filter: blur(8px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.lang-toggle:hover {
  background: var(--toggle-hover);
  transform: translateY(-1px);
}

.lang-toggle svg {
  width: 1rem;
  height: 1rem;
  opacity: 0.8;
}

/* Main Layout */
main {
  width: 100%;
  max-width: 1240px;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-grow: 1;
}

.header-section {
  text-align: center;
  margin-bottom: 2.75rem;
}

.header-section h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(135deg, var(--text-main) 30%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.6rem;
}

.header-section p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-muted);
  font-weight: 500;
}

/* Cards Grid */
.cards-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  width: 100%;
}

.card {
  text-decoration: none;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: var(--card-backdrop);
  -webkit-backdrop-filter: var(--card-backdrop);
  border-radius: 1.5rem;
  padding: 2.5rem 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.25);
}

/* Top colored accent line on hover */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card.plex::before { background: linear-gradient(90deg, transparent, var(--plex-color), transparent); }
.card.jellyfin::before { background: linear-gradient(90deg, transparent, var(--jellyfin-color), transparent); }
.card.seer::before { background: linear-gradient(90deg, transparent, var(--seer-color), transparent); }
.card.audiobookshelf::before { background: linear-gradient(90deg, transparent, var(--abs-color), transparent); }

.card-icon {
  width: 4.25rem;
  height: 4.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.card-icon svg {
  width: 100%;
  height: 100%;
  max-height: 4.25rem;
}

.card h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 1.5rem;
}

.card-action {
  margin-top: auto;
  font-size: 0.825rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  background: var(--badge-bg);
  color: var(--text-sub);
  transition: all 0.3s ease;
}

.card-action svg {
  width: 0.9rem;
  height: 0.9rem;
  transition: transform 0.25s ease;
}

/* Hover & Focus States */
.card:hover, .card:focus-visible {
  transform: translateY(-8px);
  border-color: rgba(255, 255, 255, 0.25);
  outline: none;
}

.card:hover::before {
  opacity: 1;
}

.card:hover .card-icon {
  transform: scale(1.08);
}

.card:hover .card-action svg {
  transform: translateX(3px);
}

.card.plex:hover {
  box-shadow: 0 20px 40px -15px var(--plex-glow);
  border-color: rgba(229, 160, 13, 0.4);
}

.card.plex:hover .card-action {
  color: var(--plex-color);
  background: rgba(229, 160, 13, 0.12);
}

.card.jellyfin:hover {
  box-shadow: 0 20px 40px -15px var(--jellyfin-glow);
  border-color: rgba(170, 92, 195, 0.4);
}

.card.jellyfin:hover .card-action {
  color: var(--jellyfin-color);
  background: rgba(170, 92, 195, 0.12);
}

.card.seer:hover {
  box-shadow: 0 20px 40px -15px var(--seer-glow);
  border-color: rgba(59, 130, 246, 0.4);
}

.card.seer:hover .card-action {
  color: var(--seer-color);
  background: rgba(59, 130, 246, 0.12);
}

.card.audiobookshelf:hover {
  box-shadow: 0 20px 40px -15px var(--abs-glow);
  border-color: rgba(217, 119, 6, 0.4);
}

.card.audiobookshelf:hover .card-action {
  color: var(--abs-color);
  background: rgba(217, 119, 6, 0.12);
}

/* Footer */
footer {
  padding: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* --- Ultra-Wide & High-Resolution Displays (>= 1900px / 1440p / 4K) --- */
@media (min-width: 1900px) {
  html {
    font-size: 120%; /* Enlarge everything proportionally by +20% */
  }

  .top-bar {
    max-width: 1600px;
    padding: 2.25rem 2.5rem 1rem;
  }

  main {
    max-width: 1550px;
  }

  .cards-container {
    gap: 2.25rem;
  }

  .card {
    padding: 3rem 2rem 2.5rem;
    border-radius: 1.75rem;
  }

  .card-icon {
    width: 5rem;
    height: 5rem;
    margin-bottom: 1.5rem;
  }

  .card-icon svg {
    max-height: 5rem;
  }
}

/* --- Medium Screens (Tablets / Laptops) --- */
@media (max-width: 1080px) and (min-width: 769px) {
  .cards-container {
    grid-template-columns: repeat(2, 1fr);
    max-width: 720px;
  }
}

/* --- Mobile Adaptability (Vertical Stacking) --- */
@media (max-width: 768px) {
  html, body {
    height: auto;
    min-height: 100dvh;
    overflow-x: hidden;
    overflow-y: auto;
  }

  .top-bar {
    padding: 1.25rem 1.25rem 0.5rem;
  }

  main {
    padding: 1rem 1.25rem 2rem;
    justify-content: flex-start;
  }

  .header-section {
    margin-bottom: 2rem;
  }

  .header-section h1 {
    font-size: 2.2rem;
  }

  .cards-container {
    grid-template-columns: 1fr;
    max-width: 440px;
    gap: 1.25rem;
  }

  .card {
    padding: 2rem 1.5rem 1.5rem;
  }

  .card-icon {
    width: 3.75rem;
    height: 3.75rem;
    margin-bottom: 1.25rem;
  }

  .card h2 {
    font-size: 1.35rem;
  }

  .card p {
    margin-bottom: 1.25rem;
  }

  .card:active {
    transform: scale(0.98);
  }
}