/* ==========================================================================
   BetterTGStreamer M3U8 Downloader — Design System & CSS
   Aesthetic: Dark Glassmorphism, Neon Red / Cyan Accents, Smooth Animations
   ========================================================================== */

:root {
  --bg-main: #08090d;
  --bg-card: rgba(18, 21, 33, 0.7);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-card-hover: rgba(24, 28, 44, 0.85);
  
  --primary: #e50914;
  --primary-hover: #ff1f2d;
  --primary-glow: rgba(229, 9, 20, 0.4);
  
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Ambient Radial Glow */
.glow-bg {
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(circle, rgba(229, 9, 20, 0.15) 0%, rgba(79, 70, 229, 0.08) 50%, transparent 80%);
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

/* Typography & Helpers */
.font-mono {
  font-family: var(--font-mono);
}

.gradient-text {
  background: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hidden {
  display: none !important;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(8, 9, 13, 0.75);
  border-bottom: 1px solid var(--bg-card-border);
}

.nav-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary) 0%, #80050c 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent-cyan);
}

.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.pulse-indicator {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

/* Main Container */
.main-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 20px 80px 20px;
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Hero Section */
.hero-section {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(229, 9, 20, 0.12);
  border: 1px solid rgba(229, 9, 20, 0.3);
  color: #ff858d;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.hero-heading {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
}

.hero-subtext {
  max-width: 620px;
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* Cards Base */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

/* URL Input Card */
.url-card {
  padding: 20px;
}

.input-group {
  display: flex;
  align-items: center;
  background: rgba(8, 9, 13, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 6px 6px 6px 16px;
  gap: 12px;
  transition: var(--transition);
}

.input-group:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 16px var(--primary-glow);
}

.input-icon {
  color: var(--text-dim);
  display: flex;
  align-items: center;
}

.input-group input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.input-group input::placeholder {
  color: var(--text-dim);
  font-family: var(--font-sans);
}

.url-hint {
  margin-top: 10px;
  padding: 0 6px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.url-hint code {
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

/* Buttons */
button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #b8050e 100%);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover) 0%, #cb0712 100%);
  transform: translateY(-1px);
  box-shadow: 0 6px 22px var(--primary-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.btn-download-hero {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: #fff;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.35);
}

.btn-download-hero:hover {
  background: linear-gradient(135deg, #34d399 0%, #059669 100%);
  box-shadow: 0 6px 24px rgba(16, 185, 129, 0.45);
  transform: translateY(-1px);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  color: #fff;
}

/* Badges */
.badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.4px;
}

.badge-hash {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.badge-info {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
}

/* Inspector Card */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.stream-stats-header {
  display: flex;
  gap: 8px;
}

.stat-pill {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Tracks Grid */
.tracks-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

@media (max-width: 800px) {
  .tracks-grid {
    grid-template-columns: 1fr;
  }
}

.track-panel {
  background: rgba(10, 12, 18, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.track-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.track-type {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.92rem;
}

.track-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
}

.track-row {
  display: flex;
  justify-content: space-between;
}

.track-label {
  color: var(--text-dim);
}

.track-val {
  color: var(--text-main);
  font-weight: 500;
}

.tracks-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 140px;
  overflow-y: auto;
}

.track-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.82rem;
}

.track-name {
  font-weight: 600;
  color: var(--text-main);
}

.track-meta {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.empty-subs-notice {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-style: italic;
  padding: 8px 0;
}

/* Options Toolbar */
.options-toolbar {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 14px;
  background: rgba(10, 12, 18, 0.5);
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 24px;
}

@media (max-width: 700px) {
  .options-toolbar {
    grid-template-columns: 1fr;
  }
}

.option-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.option-field label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-text, .select-dropdown {
  background: rgba(18, 21, 33, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  font-family: var(--font-sans);
}

.select-dropdown {
  cursor: pointer;
}

.input-text:focus, .select-dropdown:focus {
  border-color: var(--primary);
}

.download-action-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

/* Active Download Progress Card */
.progress-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.progress-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pulsing-download-dot {
  width: 12px;
  height: 12px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-cyan);
  animation: pulse-dot 1.2s infinite ease-in-out;
}

#progress-status-text {
  font-size: 1.3rem;
  font-weight: 700;
}

.progress-percentage {
  font-size: 2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.percent-symbol {
  font-size: 1.2rem;
}

.progress-bar-container {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, #ff4b2b 50%, var(--accent-cyan) 100%);
  border-radius: var(--radius-full);
  box-shadow: 0 0 14px rgba(0, 242, 254, 0.5);
  transition: width 0.2s ease-out;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

@media (max-width: 700px) {
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric-card {
  background: rgba(10, 12, 18, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
}

.metric-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Segment Matrix Grid */
.segment-matrix-container {
  background: rgba(8, 9, 13, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.matrix-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.segment-matrix {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  max-height: 120px;
  overflow-y: auto;
  padding: 4px;
}

.matrix-chunk {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.1);
  transition: background 0.15s ease;
}

.matrix-chunk.downloading {
  background: var(--accent-yellow);
  box-shadow: 0 0 6px var(--accent-yellow);
}

.matrix-chunk.completed {
  background: var(--accent-green);
}

.matrix-chunk.error {
  background: var(--primary);
}

.progress-actions {
  display: flex;
  justify-content: flex-end;
}

/* Completed Card */
.completed-card {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px 20px;
}

.completed-icon {
  font-size: 3rem;
  animation: bounce 1s infinite alternate ease-in-out;
}

@keyframes bounce {
  from { transform: translateY(0); }
  to { transform: translateY(-8px); }
}

.completed-title {
  font-size: 2rem;
  font-weight: 800;
}

.completed-desc {
  max-width: 500px;
  color: var(--text-muted);
}

.completed-stats-box {
  background: rgba(10, 12, 18, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 16px 24px;
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.9rem;
}

.completed-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.completed-row strong {
  color: var(--text-main);
}

.completed-actions {
  display: flex;
  gap: 12px;
  margin-top: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Terminal Commands Accordion */
.terminal-card {
  padding: 18px 22px;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.accordion-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
}

.accordion-toggle {
  font-size: 0.75rem;
  color: var(--text-dim);
  transition: transform 0.25s ease;
}

.accordion-toggle.rotated {
  transform: rotate(180deg);
}

.accordion-content {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.accordion-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cli-box {
  background: #050608;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.cli-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.btn-copy {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.cli-box pre {
  padding: 12px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #a7f3d0;
}

/* Footer */
.footer {
  text-align: center;
  padding: 30px 20px;
  color: var(--text-dim);
  font-size: 0.8rem;
  border-top: 1px solid var(--bg-card-border);
}