/* ═══════════════════════════════════════════════════════════════════════
   360° Video Platform — Styles
   Mobile-first, dark theme, optimized for video browsing
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  --bg: #0a0a0f;
  --surface: #14141f;
  --surface-hover: #1e1e2e;
  --border: #2a2a3e;
  --text: #e8e8f0;
  --text-muted: #8888a0;
  --accent: #7c4dff;
  --accent-glow: rgba(124, 77, 255, 0.3);
  --danger: #ff4d6a;
  --radius: 12px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  line-height: 1.5;
}

/* ── Navigation ───────────────────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav .logo-icon {
  font-size: 1.5rem;
}

nav .nav-links {
  display: flex;
  gap: 12px;
}

nav .nav-links a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.2s;
}

nav .nav-links a:hover,
nav .nav-links a.active {
  background: var(--accent);
  color: #fff;
}

/* ── Page Header ──────────────────────────────────────────────────── */
.page-header {
  text-align: center;
  padding: 40px 20px 20px;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ── Gallery Grid ─────────────────────────────────────────────────── */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.video-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.video-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.video-card .thumbnail {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.video-card .thumbnail .icon {
  font-size: 3rem;
  opacity: 0.4;
}

.video-card .thumbnail .vr-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.video-card .info {
  padding: 14px 16px;
}

.video-card .info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.video-card .info .meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Empty State ──────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-muted);
}

.empty-state .icon {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.3;
}

.empty-state h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
  color: var(--text);
}

.empty-state a {
  display: inline-block;
  margin-top: 16px;
  background: var(--accent);
  color: #fff;
  padding: 12px 28px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

/* ── Upload Page ──────────────────────────────────────────────────── */
.upload-container {
  max-width: 560px;
  margin: 0 auto;
  padding: 30px 20px;
}

.upload-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

/* ── Drag & Drop Zone ─────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.drop-zone .drop-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
  opacity: 0.5;
}

.drop-zone p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.drop-zone .browse-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
}

.drop-zone input[type='file'] {
  display: none;
}

.drop-zone .file-name {
  margin-top: 12px;
  font-weight: 600;
  color: var(--accent);
  word-break: break-all;
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

/* ── Progress Bar ─────────────────────────────────────────────────── */
.progress-bar {
  display: none;
  margin-top: 16px;
  background: var(--border);
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
}

.progress-bar.active {
  display: block;
}

.progress-bar .fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  width: 0%;
  transition: width 0.2s;
}

/* ── Status Message ───────────────────────────────────────────────── */
.status-msg {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}

.status-msg.success {
  display: block;
  background: rgba(0, 200, 100, 0.15);
  color: #00c864;
  border: 1px solid rgba(0, 200, 100, 0.3);
}

.status-msg.error {
  display: block;
  background: rgba(255, 77, 106, 0.15);
  color: var(--danger);
  border: 1px solid rgba(255, 77, 106, 0.3);
}

/* ── 360° Player — Full-Screen ────────────────────────────────────── */
.player-page {
  position: fixed;
  inset: 0;
  background: #000;
  overflow: hidden;
}

.player-page a-scene {
  position: absolute;
  inset: 0;
}

/* ── Player UI Overlay ────────────────────────────────────────────── */
.player-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  pointer-events: none;
}

.player-overlay > * {
  pointer-events: auto;
}

.player-overlay .back-btn {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.2s;
}

.player-overlay .back-btn:hover {
  background: rgba(0, 0, 0, 0.8);
}

.player-overlay .video-title {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
  max-width: 50%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
}

.player-overlay .controls-right {
  display: flex;
  gap: 8px;
}

.player-overlay .ctrl-btn {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  transition: background 0.2s;
}

.player-overlay .ctrl-btn:hover {
  background: rgba(0, 0, 0, 0.8);
}

/* ── Loading Spinner ──────────────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity 0.4s;
}

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

.spinner {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay p {
  color: var(--text-muted);
  margin-top: 16px;
  font-size: 0.9rem;
}

/* ── Error State ──────────────────────────────────────────────────── */
.error-state {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 200;
  padding: 20px;
  text-align: center;
}

.error-state .icon {
  font-size: 3rem;
}

.error-state p {
  color: var(--text-muted);
  max-width: 400px;
}

.error-state a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .gallery {
    grid-template-columns: 1fr;
    padding: 12px;
    gap: 14px;
  }

  nav {
    padding: 12px 14px;
  }

  nav .logo {
    font-size: 1.1rem;
  }

  .page-header h1 {
    font-size: 1.4rem;
  }

  .upload-container {
    padding: 16px 12px;
  }

  .upload-form {
    padding: 20px 16px;
  }

  .player-overlay {
    padding: 8px 12px;
  }

  .player-overlay .video-title {
    display: none;
  }
}