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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f0f0f;
  color: #e0e0e0;
  min-height: 100vh;
}

.screen { display: flex; flex-direction: column; min-height: 100vh; }
.hidden { display: none !important; }

/* Login */
.login-card {
  margin: auto;
  text-align: center;
  padding: 3rem 2rem;
  background: #1a1a1a;
  border-radius: 12px;
  max-width: 400px;
  width: 90%;
}
.login-card h1 { margin-bottom: 0.5rem; font-size: 1.5rem; color: #fff; }
.login-card p { margin-bottom: 1.5rem; color: #999; }

/* Buttons */
.btn {
  border: none; cursor: pointer; border-radius: 6px;
  font-size: 0.9rem; padding: 0.6rem 1.2rem;
  background: #2a2a2a; color: #e0e0e0;
  transition: background 0.15s;
}
.btn:hover { background: #3a3a3a; }
.btn-primary {
  background: #4285f4; color: #fff;
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 1rem; padding: 0.75rem 1.5rem;
}
.btn-primary:hover { background: #3367d6; }
.btn-small { font-size: 0.8rem; padding: 0.4rem 0.8rem; }
.btn-danger { background: #c0392b; color: #fff; }
.btn-danger:hover { background: #e74c3c; }

/* Header */
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1rem 2rem; background: #1a1a1a; border-bottom: 1px solid #2a2a2a;
  flex-wrap: wrap; gap: 0.5rem;
}
header h1 { font-size: 1.25rem; color: #fff; }
.header-actions { display: flex; align-items: center; gap: 0.75rem; }
#user-email { color: #999; font-size: 0.85rem; }

/* Video grid */
#video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
  padding: 2rem;
  flex: 1;
}

.video-card {
  background: #1a1a1a;
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.video-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.video-card .thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: #222;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: #555;
  position: relative; overflow: hidden;
}
.video-card .thumb img {
  width: 100%; height: 100%; object-fit: cover;
}
.video-card .play-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: rgba(255,255,255,0.8);
  background: rgba(0,0,0,0.2);
  opacity: 0; transition: opacity 0.15s;
}
.video-card:hover .play-overlay { opacity: 1; }
.video-card .info {
  padding: 0.75rem 1rem;
}
.video-card .info h3 {
  font-size: 0.95rem; color: #fff; font-weight: 500;
}
.video-card .info p {
  font-size: 0.8rem; color: #888; margin-top: 0.25rem;
}

/* Player */
#player-section {
  padding: 1rem 2rem; flex: 1;
  display: flex; flex-direction: column;
}
#player-section h2 { margin: 0.75rem 0; color: #fff; font-size: 1.2rem; }
#video-player {
  width: 100%;
  max-height: 70vh;
  background: #000;
  border-radius: 8px;
}

/* Admin */
.admin-content { padding: 2rem; max-width: 600px; }
.add-user-form { margin-bottom: 2rem; }
.add-user-form h2, .user-list-section h2 {
  font-size: 1.1rem; color: #fff; margin-bottom: 0.75rem;
}
.form-row { display: flex; gap: 0.5rem; }
.form-row input {
  flex: 1; padding: 0.6rem 0.8rem; border-radius: 6px;
  border: 1px solid #333; background: #1a1a1a; color: #e0e0e0;
  font-size: 0.9rem;
}
.form-row input:focus { outline: none; border-color: #4285f4; }
.msg { margin-top: 0.5rem; font-size: 0.85rem; }
.msg.success { color: #27ae60; }
.msg.error { color: #e74c3c; }

#user-list { list-style: none; }
#user-list li {
  display: flex; justify-content: space-between; align-items: center;
  padding: 0.6rem 0.8rem; background: #1a1a1a; border-radius: 6px;
  margin-bottom: 0.5rem; font-size: 0.9rem;
}
#user-list li .email { flex: 1; }
#user-list li .badge {
  font-size: 0.75rem; background: #4285f4; color: #fff;
  padding: 0.15rem 0.5rem; border-radius: 4px; margin-right: 0.5rem;
}

@media (max-width: 600px) {
  header { padding: 0.75rem 1rem; }
  #video-grid { padding: 1rem; grid-template-columns: 1fr; }
  .admin-content { padding: 1rem; }
}