/* ═══════════════════════════════════════════════════════════
   AI VIDEO DETECTOR  –  Premium Dark UI
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg-base:        #060912;
  --bg-surface:     #0d1220;
  --bg-card:        rgba(15, 22, 40, 0.85);
  --bg-card-hover:  rgba(20, 30, 56, 0.92);

  --accent-blue:    #4f8ef7;
  --accent-cyan:    #00d4ff;
  --accent-purple:  #a855f7;
  --accent-green:   #22d3a0;
  --accent-red:     #f44c6a;
  --accent-orange:  #f97316;

  --text-primary:   #e8edf8;
  --text-secondary: #8892aa;
  --text-muted:     #4a5568;

  --border:         rgba(79, 142, 247, 0.18);
  --border-glow:    rgba(0, 212, 255, 0.35);
  --glass:          rgba(255, 255, 255, 0.04);

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --shadow-card: 0 8px 40px rgba(0,0,0,0.5), 0 0 0 1px var(--border);
  --shadow-glow: 0 0 40px rgba(79, 142, 247, 0.2);
  --shadow-ai:   0 0 60px rgba(248, 71, 107, 0.25);
  --shadow-real: 0 0 60px rgba(34, 211, 160, 0.25);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Animated Background ──────────────────────────────────── */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-canvas::before {
  content: '';
  position: absolute;
  width: 700px; height: 700px;
  top: -200px; left: -150px;
  background: radial-gradient(circle, rgba(79,142,247,0.12) 0%, transparent 70%);
  animation: driftA 18s ease-in-out infinite alternate;
}
.bg-canvas::after {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  bottom: -150px; right: -100px;
  background: radial-gradient(circle, rgba(168,85,247,0.10) 0%, transparent 70%);
  animation: driftB 22s ease-in-out infinite alternate;
}
.bg-orb {
  position: absolute;
  width: 400px; height: 400px;
  top: 45%; left: 55%;
  background: radial-gradient(circle, rgba(0,212,255,0.07) 0%, transparent 65%);
  animation: driftC 14s ease-in-out infinite alternate;
}

@keyframes driftA { to { transform: translate(80px, 60px); } }
@keyframes driftB { to { transform: translate(-70px, -50px); } }
@keyframes driftC { to { transform: translate(-60px, 80px); } }

/* ── Layout ───────────────────────────────────────────────── */
.page-wrap {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-logo {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: 0 0 20px rgba(79,142,247,0.4);
}
.nav-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  border-radius: 20px;
  padding: 2px 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.8;
}
.nav-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse-dot 2s ease-in-out infinite;
}
.status-dot.offline { background: var(--accent-red); box-shadow: 0 0 10px var(--accent-red); }
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 52px 0 40px;
  animation: fadeUp 0.7s ease both;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 20px;
  padding: 6px 16px;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 18px;
}
.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 50%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 0;
  line-height: 1.7;
}

/* ── Main Detection Card ──────────────────────────────────── */
.detector-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  animation: fadeUp 0.7s 0.15s ease both;
}

/* ── Upload Zone ──────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 52px 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(255,255,255,0.02);
  position: relative;
  overflow: hidden;
}
.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79,142,247,0.05), rgba(0,212,255,0.03));
  opacity: 0;
  transition: var(--transition);
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 30px rgba(0,212,255,0.15), inset 0 0 30px rgba(0,212,255,0.05);
  transform: translateY(-2px);
}
.upload-zone:hover::before, .upload-zone.drag-over::before { opacity: 1; }
.upload-zone.drag-over {
  border-color: var(--accent-blue);
  animation: borderPulse 1s ease infinite;
}
@keyframes borderPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(79,142,247,0.25), inset 0 0 20px rgba(79,142,247,0.08); }
  50%       { box-shadow: 0 0 40px rgba(79,142,247,0.45), inset 0 0 40px rgba(79,142,247,0.12); }
}
.upload-icon {
  width: 64px; height: 64px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(79,142,247,0.15), rgba(0,212,255,0.1));
  border-radius: 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  border: 1px solid rgba(79,142,247,0.25);
  transition: var(--transition);
}
.upload-zone:hover .upload-icon {
  background: linear-gradient(135deg, rgba(79,142,247,0.25), rgba(0,212,255,0.18));
  transform: scale(1.08);
  box-shadow: 0 0 24px rgba(0,212,255,0.3);
}
.upload-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.upload-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.upload-formats {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.fmt-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-blue);
  background: rgba(79,142,247,0.1);
  border: 1px solid rgba(79,142,247,0.2);
  border-radius: 6px;
  padding: 3px 10px;
  font-family: 'JetBrains Mono', monospace;
}
#file-input { display: none; }

/* ── Video Preview ────────────────────────────────────────── */
.preview-area {
  display: none;
  margin-top: 28px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  position: relative;
}
.preview-area.visible { display: block; animation: fadeUp 0.4s ease both; }
#preview-video {
  width: 100%;
  max-height: 340px;
  object-fit: contain;
  display: block;
}
.preview-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  border-top: 1px solid var(--border);
}
.preview-name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 60%;
}
.preview-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
}
.preview-remove {
  background: rgba(244,76,106,0.15);
  border: 1px solid rgba(244,76,106,0.3);
  color: var(--accent-red);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.preview-remove:hover {
  background: rgba(244,76,106,0.28);
  box-shadow: 0 0 14px rgba(244,76,106,0.25);
}

/* ── Analyze Button ───────────────────────────────────────── */
.btn-analyze {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  margin-top: 28px;
  padding: 17px 32px;
  font-size: 1rem;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  letter-spacing: -0.01em;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(79,142,247,0.35);
}
.btn-analyze::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: var(--transition);
}
.btn-analyze:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(79,142,247,0.5);
}
.btn-analyze:hover:not(:disabled)::before { opacity: 1; }
.btn-analyze:active:not(:disabled) { transform: translateY(0); }
.btn-analyze:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}
.btn-analyze.loading .btn-spinner { display: block; }
.btn-analyze.loading .btn-label { opacity: 0.7; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Progress Bar ─────────────────────────────────────────── */
.progress-wrap {
  margin-top: 22px;
  display: none;
}
.progress-wrap.visible { display: block; animation: fadeUp 0.3s ease both; }
.progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.progress-bar-track {
  height: 5px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
  border-radius: 999px;
  width: 0%;
  transition: width 0.4s ease;
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}
.progress-steps {
  display: flex;
  gap: 6px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.pstep {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border-radius: 20px;
  padding: 3px 10px;
  transition: var(--transition);
}
.pstep.active {
  color: var(--accent-cyan);
  background: rgba(0,212,255,0.1);
  box-shadow: 0 0 12px rgba(0,212,255,0.2);
}
.pstep.done {
  color: var(--accent-green);
  background: rgba(34,211,160,0.1);
}

/* ── Results Panel ────────────────────────────────────────── */
.results-panel {
  display: none;
  margin-top: 32px;
}
.results-panel.visible { display: block; animation: fadeUp 0.5s ease both; }

.result-card {
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
}
.result-card.ai-result {
  border-color: rgba(244,76,106,0.35);
  box-shadow: var(--shadow-ai);
}
.result-card.real-result {
  border-color: rgba(34,211,160,0.35);
  box-shadow: var(--shadow-real);
}

.result-layout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 36px;
  align-items: center;
}

/* Gauge */
.gauge-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.gauge-svg { width: 160px; height: 160px; }
.gauge-track {
  fill: none;
  stroke: rgba(255,255,255,0.06);
  stroke-width: 12;
}
.gauge-fill {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.4,0,0.2,1);
}
.gauge-fill.ai-fill   { stroke: url(#gaugeGradAI); }
.gauge-fill.real-fill { stroke: url(#gaugeGradReal); }
.gauge-center {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.3rem;
  font-weight: 700;
  fill: var(--text-primary);
}
.gauge-label-svg {
  font-size: 0.6rem;
  fill: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Verdict Info */
.verdict-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  border: 1px solid;
}
.verdict-badge.ai-badge {
  color: var(--accent-red);
  background: rgba(244,76,106,0.1);
  border-color: rgba(244,76,106,0.3);
}
.verdict-badge.real-badge {
  color: var(--accent-green);
  background: rgba(34,211,160,0.1);
  border-color: rgba(34,211,160,0.3);
}
.verdict-icon { font-size: 1.5rem; }

.result-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}
.metric-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
}
.metric-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}
.metric-value {
  font-size: 1.05rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-primary);
}
.metric-value.green { color: var(--accent-green); }
.metric-value.red   { color: var(--accent-red); }
.metric-value.blue  { color: var(--accent-blue); }

.result-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding: 14px;
  background: rgba(255,255,255,0.025);
  border-radius: var(--radius-sm);
  border-left: 3px solid;
}
.result-desc.ai  { border-color: var(--accent-red); }
.result-desc.real{ border-color: var(--accent-green); }

.btn-reset {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 10px 22px;
  font-size: 0.87rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}
.btn-reset:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.09);
  border-color: rgba(255,255,255,0.2);
}


/* ── Footer ───────────────────────────────────────────────── */
footer {
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-brand {
  font-weight: 700;
  color: var(--text-secondary);
}

/* ── Toast Notifications ──────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  font-size: 0.87rem;
  font-weight: 500;
  max-width: 360px;
  animation: slideInRight 0.3s ease;
  border: 1px solid;
}
.toast.error {
  background: rgba(244,76,106,0.15);
  border-color: rgba(244,76,106,0.35);
  color: #ffaab8;
}
.toast.success {
  background: rgba(34,211,160,0.12);
  border-color: rgba(34,211,160,0.3);
  color: #7fffd4;
}
.toast.info {
  background: rgba(79,142,247,0.12);
  border-color: rgba(79,142,247,0.3);
  color: #aaccff;
}
.toast-icon { font-size: 1.1rem; }
.toast-exit { animation: slideOutRight 0.3s ease forwards; }
@keyframes slideInRight {
  from { transform: translateX(110%); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}
@keyframes slideOutRight {
  from { transform: translateX(0);    opacity: 1; }
  to   { transform: translateX(110%); opacity: 0; }
}

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

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 700px) {
  .detector-card { padding: 24px 18px; }
  .result-layout { grid-template-columns: 1fr; }
  .gauge-wrap { margin: 0 auto; }
  .result-metrics { grid-template-columns: 1fr 1fr; }
  .navbar { flex-direction: column; align-items: flex-start; gap: 14px; }
}
@media (max-width: 480px) {
  .page-wrap { padding: 0 14px 60px; }
  .result-metrics { grid-template-columns: 1fr; }
}