:root {
  --bg-main: #0d1117;
  --bg-sidebar: #161b22;
  --bg-card: #21262d;
  --bg-hover: #30363d;
  --accent: #00ffcc;
  --accent-hover: #00cca3;
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  --border: #30363d;
  --danger: #ff4757;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
}

/* Modal Auth */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}
.modal-box {
  background: var(--bg-card);
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  width: 340px;
  border: 1px solid var(--border);
}
.modal-box h2 { margin-bottom: 6px; color: var(--accent); }
.modal-box p { color: var(--text-muted); font-size: 13px; margin-bottom: 15px; }
.auth-tabs {
  display: flex;
  margin-bottom: 15px;
  background: var(--bg-main);
  border-radius: 6px;
  padding: 3px;
}
.auth-tabs button {
  flex: 1;
  padding: 8px;
  background: transparent;
  color: var(--text-muted);
  border: none;
  border-radius: 4px;
}
.auth-tabs button.active {
  background: var(--bg-card);
  color: var(--accent);
  font-weight: 600;
}
.modal-box input {
  width: 100%;
  padding: 10px;
  background: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: #fff;
  margin-bottom: 12px;
}
.error-msg { color: var(--danger); font-size: 12px; margin-bottom: 10px; }
.w-100 { width: 100%; }

/* App Layout */
.app-container {
  display: grid;
  grid-template-columns: 240px 1fr 340px;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 15px;
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.brand {
  font-size: 18px;
  font-weight: bold;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-menu { display: flex; flex-direction: column; gap: 8px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  text-align: left;
  transition: 0.2s;
}
.nav-item:hover { background: var(--bg-hover); color: #fff; }
.nav-item.active { background: var(--accent); color: #000; font-weight: 600; }

.btn-logout {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--border);
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: 0.2s;
}
.btn-logout:hover { background: rgba(255, 71, 87, 0.1); }

.online-users-box {
  margin-top: auto;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.online-users-box h4 { font-size: 13px; color: var(--text-muted); margin-bottom: 10px; }
.users-list { display: flex; flex-direction: column; gap: 8px; max-height: 140px; overflow-y: auto; }
.user-item { display: flex; align-items: center; gap: 8px; font-size: 13px; }
.user-item img { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; }
.user-status { font-size: 11px; color: var(--text-muted); }

/* Main */
.main-content { overflow-y: auto; padding: 20px; background: var(--bg-main); }
.tab-pane { display: none; flex-direction: column; gap: 20px; }
.tab-pane.active { display: flex; }

/* Cinema Player */
.player-wrapper { background: #000; border-radius: 12px; overflow: hidden; border: 1px solid var(--border); }
.video-container { width: 100%; aspect-ratio: 16/9; position: relative; }
.video-container video { width: 100%; height: 100%; display: block; }
.media-meta { padding: 12px 16px; background: var(--bg-card); }

/* Controls & Library */
.controls-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.add-box, .library-box { background: var(--bg-card); padding: 16px; border-radius: 10px; border: 1px solid var(--border); }
.add-box h4, .library-box h4 { margin-bottom: 12px; font-size: 14px; color: var(--accent); }
.input-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
.input-group input { background: var(--bg-main); border: 1px solid var(--border); padding: 8px 12px; border-radius: 6px; color: #fff; }
.file-upload-row { display: flex; align-items: center; gap: 10px; }
.media-list { display: flex; flex-direction: column; gap: 6px; max-height: 220px; overflow-y: auto; }
.media-item { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--bg-main); border-radius: 6px; cursor: pointer; font-size: 13px; }
.media-item:hover { background: var(--bg-hover); }

/* Music Layout */
.music-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.music-player-card {
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}
.music-player-card.drag-over { border-color: var(--accent); background: #1a252c; }
.disc-art { font-size: 80px; color: var(--accent); animation: spin 8s linear infinite; animation-play-state: paused; }
.disc-art.playing { animation-play-state: running; }
@keyframes spin { 100% { transform: rotate(360deg); } }
.music-player-card audio { width: 100%; margin-top: 10px; }
.drop-hint { font-size: 12px; color: var(--text-muted); }

.lyrics-container { background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border); padding: 16px; display: flex; flex-direction: column; }
.lyrics-header { margin-bottom: 10px; }
.lyrics-content { flex: 1; white-space: pre-wrap; font-size: 14px; line-height: 1.6; color: #c9d1d9; overflow-y: auto; max-height: 250px; }

/* User Profile */
.profile-card { background: var(--bg-card); max-width: 450px; padding: 24px; border-radius: 12px; border: 1px solid var(--border); display: flex; flex-direction: column; gap: 16px; }
.profile-avatar-wrapper { position: relative; width: 90px; height: 90px; margin: 0 auto; }
.profile-avatar-wrapper img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; border: 2px solid var(--accent); }
.btn-file-avatar { position: absolute; bottom: 0; right: 0; background: var(--accent); color: #000; width: 28px; height: 28px; border-radius: 50%; display: flex; justify-content: center; align-items: center; cursor: pointer; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text-muted); }
.form-group input { background: var(--bg-main); border: 1px solid var(--border); padding: 8px 12px; border-radius: 6px; color: #fff; }

/* Chat */
.chat-sidebar { background: var(--bg-sidebar); border-left: 1px solid var(--border); display: flex; flex-direction: column; height: 100vh; }
.chat-header { padding: 14px; border-bottom: 1px solid var(--border); }
.chat-messages { flex: 1; overflow-y: auto; padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.chat-msg { display: flex; gap: 10px; font-size: 13px; line-height: 1.4; }
.chat-msg img { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.msg-content { display: flex; flex-direction: column; }
.msg-author { font-weight: bold; margin-bottom: 2px; }
.msg-text { word-break: break-word; color: #e6edf3; }
.chat-input-area { padding: 10px; border-top: 1px solid var(--border); display: flex; gap: 8px; }
.chat-input-area input { flex: 1; background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; padding: 8px 12px; color: #fff; }

/* Buttons */
button { cursor: pointer; border-radius: 6px; border: none; font-size: 13px; font-weight: 500; }
.btn-primary { background: var(--accent); color: #000; padding: 8px 14px; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-file { background: var(--bg-hover); color: #fff; padding: 8px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; }
.btn-send { background: var(--accent); color: #000; padding: 0 14px; }
.status-badge { font-size: 12px; color: var(--accent); }