/**
 * TikTok Knowledge Vault
 * Modern Dark Aesthetic & Responsive Layout Styles
 */

:root {
  --tk-bg-dark: #0f1117;
  --tk-card-bg: #161922;
  --tk-card-hover: #1e2230;
  --tk-sidebar-bg: #13161f;
  --tk-border: #262b3d;
  --tk-text-main: #f1f5f9;
  --tk-text-muted: #94a3b8;
  --tk-cyan: #25f4ee;
  --tk-pink: #fe2c55;
  --tk-accent-grad: linear-gradient(135deg, #25f4ee 0%, #fe2c55 100%);
  --tk-code-bg: #0b0d13;
}

body {
  background-color: var(--tk-bg-dark);
  color: var(--tk-text-main);
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Glassmorphism & Navbar */
.navbar-vault {
  background-color: rgba(19, 22, 31, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--tk-border);
}

.brand-gradient {
  background: var(--tk-accent-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.vault-badge {
  font-size: 0.72rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* Custom Purple for Categories */
.bg-purple {
  background-color: #8b5cf6 !important;
  color: #ffffff !important;
}

/* Sidebar Styling */
.vault-sidebar {
  background-color: var(--tk-sidebar-bg);
  border-right: 1px solid var(--tk-border);
  min-height: calc(100vh - 65px);
}

.sidebar-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--tk-text-muted);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.nav-vault-link {
  color: var(--tk-text-muted);
  border-radius: 10px;
  padding: 0.6rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
}

.nav-vault-link:hover {
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--tk-text-main);
}

.nav-vault-link.active {
  background: rgba(37, 244, 238, 0.12);
  color: var(--tk-cyan);
  border-left: 3px solid var(--tk-cyan);
}

/* Card Styling */
.vault-card {
  background-color: var(--tk-card-bg);
  border: 1px solid var(--tk-border);
  border-radius: 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  overflow: hidden;
}

.vault-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
  border-color: rgba(37, 244, 238, 0.4);
}

/* Video Card Thumbnail 9:16 vertical ratio look */
.video-thumb-container {
  position: relative;
  width: 100%;
  padding-top: 133%; /* 3:4 or 9:16 aesthetic in grid */
  background-color: #0b0d13;
  overflow: hidden;
  cursor: pointer;
}

.video-thumb-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.video-thumb-container:hover .video-thumb-img {
  transform: scale(1.05);
}

.video-overlay-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 54px;
  height: 54px;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.4rem;
  opacity: 0.85;
  transition: all 0.25s ease;
}

.video-thumb-container:hover .video-overlay-play {
  opacity: 1;
  background: var(--tk-pink);
  border-color: var(--tk-pink);
  transform: translate(-50%, -50%) scale(1.1);
}

/* Interactive Modal Player Card */
.interactive-player-card {
  position: relative;
  width: 100%;
  padding-top: 145%;
  border-radius: 16px;
  overflow: hidden;
  background-color: #0b0d13;
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  cursor: pointer;
  border: 1px solid var(--tk-border);
}

.interactive-player-card .interactive-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.85);
  transition: transform 0.3s ease, filter 0.3s ease;
}

.interactive-player-card:hover .interactive-bg-img {
  transform: scale(1.04);
  filter: brightness(0.95);
}

.interactive-center-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 74px;
  height: 74px;
  background: var(--tk-accent-grad);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-size: 2.2rem;
  box-shadow: 0 0 25px rgba(37, 244, 238, 0.6);
  transition: all 0.25s ease;
  z-index: 3;
}

.interactive-player-card:hover .interactive-center-play {
  transform: translate(-50%, -50%) scale(1.12);
  box-shadow: 0 0 35px rgba(254, 44, 85, 0.85);
}

.interactive-overlay-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 15px 15px;
  background: linear-gradient(to top, rgba(0,0,0,0.92) 0%, transparent 100%);
  z-index: 2;
}

.video-top-badges {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
  pointer-events: none;
}

.video-bottom-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px 12px 10px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85) 0%, transparent 100%);
  z-index: 2;
  pointer-events: none;
}

/* Prompt / Code Box in Cards & Modal */
.code-box-preview {
  background-color: var(--tk-code-bg);
  border: 1px solid var(--tk-border);
  border-radius: 8px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
  color: #38bdf8;
  max-height: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 6px 10px;
  white-space: pre-wrap;
  word-break: break-all;
}

.code-box-full {
  background-color: var(--tk-code-bg);
  border: 1px solid var(--tk-border);
  border-radius: 12px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.88rem;
  color: #e2e8f0;
  padding: 16px;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 420px;
  overflow-y: auto;
  line-height: 1.6;
}

/* Modal TikTok Player */
.modal-content-dark {
  background-color: #131620;
  border: 1px solid var(--tk-border);
  color: var(--tk-text-main);
  border-radius: 20px;
}

.modal-header-dark {
  border-bottom: 1px solid var(--tk-border);
}

.modal-footer-dark {
  border-top: 1px solid var(--tk-border);
}

.tiktok-player-embed-wrap {
  min-height: 520px;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #0b0d13;
  border-radius: 14px;
  overflow: hidden;
  padding: 10px;
}

.tiktok-player-embed-wrap iframe,
.tiktok-player-embed-wrap blockquote {
  margin: 0 auto !important;
  max-width: 100% !important;
}

/* Form Controls Dark Theme */
.form-control-dark, .form-select-dark {
  background-color: #0d0f16;
  border: 1px solid var(--tk-border);
  color: #f1f5f9;
  border-radius: 10px;
}

.form-control-dark:focus, .form-select-dark:focus {
  background-color: #11141e;
  border-color: var(--tk-cyan);
  color: #ffffff;
  box-shadow: 0 0 0 0.25rem rgba(37, 244, 238, 0.2);
}

/* Buttons */
.btn-tk-primary {
  background: var(--tk-accent-grad);
  color: #000;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.btn-tk-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
  color: #000;
  box-shadow: 0 4px 15px rgba(37, 244, 238, 0.3);
}

.btn-tk-outline {
  border: 1px solid var(--tk-border);
  color: var(--tk-text-main);
  background: transparent;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.btn-tk-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border-color: var(--tk-text-muted);
}

/* Copy Toast / Alert Notification */
.copy-badge-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1060;
}

/* Stat Cards */
.stat-card-glow {
  background: linear-gradient(145deg, #161a25 0%, #1a1f2e 100%);
  border: 1px solid var(--tk-border);
  border-radius: 16px;
  padding: 20px;
}

.stat-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #0f1117;
}
::-webkit-scrollbar-thumb {
  background: #2a3147;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #3b4564;
}