/* ====== CSS Variables - Light/Dark Theme ====== */
:root {
  --bg: #f0f2f5; --bg2: #ffffff; --bg3: #f8f9fa;
  --text: #1a1a2e; --text2: #555; --text3: #888;
  --primary: #4f46e5; --primary-light: #818cf8; --primary-dark: #3730a3;
  --accent: #06b6d4; --success: #10b981; --warning: #f59e0b; --danger: #ef4444;
  --border: #e5e7eb; --shadow: rgba(0,0,0,.08);
  --card: #ffffff; --input-bg: #f9fafb;
  --chat-bg: #f3f4f6; --chat-me: #4f46e5; --chat-other: #e5e7eb;
  --radius: 12px; --radius-sm: 8px;
}
[data-theme="dark"] {
  --bg: #0f0f1a; --bg2: #1a1a2e; --bg3: #16213e;
  --text: #e2e8f0; --text2: #a0aec0; --text3: #718096;
  --primary: #818cf8; --primary-light: #a5b4fc; --primary-dark: #6366f1;
  --border: #2d3748; --shadow: rgba(0,0,0,.3);
  --card: #1e293b; --input-bg: #2d3748;
  --chat-bg: #1e293b; --chat-me: #6366f1; --chat-other: #374151;
}

/* ====== Reset & Base ====== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; line-height: 1.6; transition: background .3s, color .3s; }
a { color: var(--primary); text-decoration: none; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }

/* ====== Scrollbar ====== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text3); border-radius: 3px; }

/* ====== Theme Toggle ====== */
.theme-toggle { background: var(--bg3); border: 1px solid var(--border); border-radius: 6px; width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; font-size: 14px; transition: all .2s; color: var(--text2); flex-shrink: 0; }
.theme-toggle:hover { border-color: var(--primary); color: var(--primary); }
.theme-toggle-fixed { position: fixed; top: 16px; right: 16px; z-index: 1000; box-shadow: 0 2px 8px var(--shadow); border-radius: 50%; width: 40px; height: 40px; }

/* ====== Auth Pages ====== */
.auth-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent) 100%); }
.auth-card { background: var(--card); border-radius: var(--radius); padding: 40px; width: 100%; max-width: 420px; box-shadow: 0 20px 60px rgba(0,0,0,.2); }
.auth-card h1 { font-size: 1.8rem; margin-bottom: 8px; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.auth-card p.subtitle { color: var(--text2); margin-bottom: 28px; font-size: .9rem; }
.auth-card .logo { font-size: 1.6rem; font-weight: 700; margin-bottom: 12px; color: var(--primary); letter-spacing: 2px; }

/* ====== Form ====== */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: .9rem; color: var(--text2); }
.form-input { width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--input-bg); color: var(--text); transition: border .2s, box-shadow .2s; outline: none; }
.form-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,70,229,.15); }
.form-input::placeholder { color: var(--text3); }
select.form-input { cursor: pointer; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 12px 24px; border: none; border-radius: var(--radius-sm); font-weight: 600; cursor: pointer; transition: all .2s; font-size: .9rem; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,70,229,.3); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: .9; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .9; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 6px 14px; font-size: .8rem; border-radius: 6px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.link-text { font-size: .85rem; color: var(--text2); text-align: center; margin-top: 16px; }
.link-text a { color: var(--primary); font-weight: 500; }

/* ====== Toast ====== */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 10000; display: flex; flex-direction: column; gap: 8px; }
.toast { padding: 12px 20px; border-radius: var(--radius-sm); color: #fff; font-size: .9rem; box-shadow: 0 4px 16px rgba(0,0,0,.15); animation: slideIn .3s ease; max-width: 360px; }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); }
.toast.info { background: var(--primary); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ====== Player Page Layout ====== */
.player-layout { display: flex; height: 100vh; overflow: hidden; }
.player-main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.player-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 20px; background: var(--bg2); border-bottom: 1px solid var(--border); flex-shrink: 0; }
.player-header h2 { font-size: 1.1rem; display: flex; align-items: center; gap: 8px; }
.player-header .badge { background: var(--danger); color: #fff; font-size: .7rem; padding: 2px 8px; border-radius: 10px; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .6; } }
.player-header .user-info { display: flex; align-items: center; gap: 12px; font-size: .85rem; }
.player-header .credits-display { background: var(--bg3); padding: 4px 12px; border-radius: 20px; font-weight: 600; color: var(--warning); }

.video-area { flex: 1; background: #000; position: relative; min-height: 200px; }
.video-area video, .video-area #video-player { width: 100%; height: 100%; object-fit: contain; }

.stream-selector { display: flex; align-items: center; gap: 8px; padding: 8px 20px; background: var(--bg2); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.stream-selector span { font-size: .8rem; color: var(--text2); white-space: nowrap; }
.stream-btn { padding: 4px 14px; border: 1px solid var(--border); border-radius: 20px; background: var(--bg3); font-size: .8rem; cursor: pointer; transition: all .2s; color: var(--text); }
.stream-btn.active, .stream-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ====== Chat Panel ====== */
.chat-panel { width: 350px; background: var(--bg2); border-left: 1px solid var(--border); display: flex; flex-direction: column; flex-shrink: 0; }
.chat-header { padding: 12px 16px; border-bottom: 1px solid var(--border); font-weight: 600; font-size: .95rem; display: flex; justify-content: space-between; align-items: center; }
.chat-header .online-badge { font-size: .75rem; background: var(--success); color: #fff; padding: 2px 10px; border-radius: 10px; }
.chat-messages { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
.chat-msg { max-width: 85%; padding: 8px 12px; border-radius: 12px; font-size: .85rem; line-height: 1.5; word-break: break-word; }
.chat-msg .chat-user { font-size: .75rem; font-weight: 600; color: var(--primary); margin-bottom: 2px; }
.chat-msg .chat-time { font-size: .7rem; color: var(--text3); margin-top: 2px; }
.chat-msg.other { background: var(--chat-other); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.me { background: var(--chat-me); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-msg.me .chat-user { color: rgba(255,255,255,.8); }
.chat-msg.me .chat-time { color: rgba(255,255,255,.6); }
.chat-msg.system { background: var(--bg3); align-self: center; color: var(--text3); font-size: .8rem; padding: 4px 12px; border-radius: 20px; }
.chat-input-area { padding: 12px; border-top: 1px solid var(--border); display: flex; gap: 8px; }
.chat-input-area input { flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 20px; background: var(--input-bg); color: var(--text); outline: none; }
.chat-input-area input:focus { border-color: var(--primary); }
.chat-input-area button { padding: 10px 18px; background: var(--primary); color: #fff; border: none; border-radius: 20px; cursor: pointer; font-weight: 600; font-size: .85rem; }

/* ====== Admin Panel ====== */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 240px; background: var(--bg2); border-right: 1px solid var(--border); padding: 20px 0; flex-shrink: 0; display: flex; flex-direction: column; }
.admin-sidebar .logo { padding: 0 20px 20px; font-size: 1.2rem; font-weight: 700; color: var(--primary); border-bottom: 1px solid var(--border); margin-bottom: 12px; }
.admin-sidebar .nav-item { display: flex; align-items: center; gap: 10px; padding: 12px 20px; color: var(--text2); cursor: pointer; transition: all .2s; font-size: .9rem; border-left: 3px solid transparent; }
.admin-sidebar .nav-item:hover { background: var(--bg3); color: var(--text); }
.admin-sidebar .nav-item.active { background: rgba(79,70,229,.1); color: var(--primary); border-left-color: var(--primary); font-weight: 600; }
.admin-sidebar .sidebar-footer { margin-top: auto; padding: 16px 20px; border-top: 1px solid var(--border); font-size: .8rem; color: var(--text3); }

.admin-content { flex: 1; padding: 24px; overflow-y: auto; }
.admin-content h2 { font-size: 1.4rem; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }

/* Dashboard cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; }
.stat-card .stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); margin-top: 8px; }
.stat-card .stat-label { font-size: .85rem; color: var(--text2); }

/* Table */
.table-container { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.table-toolbar { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--border); gap: 12px; flex-wrap: wrap; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: .85rem; }
th { background: var(--bg3); font-weight: 600; color: var(--text2); white-space: nowrap; }
tr:hover { background: var(--bg3); }
.badge-sm { display: inline-block; padding: 2px 10px; border-radius: 10px; font-size: .75rem; font-weight: 500; }
.badge-green { background: rgba(16,185,129,.15); color: var(--success); }
.badge-red { background: rgba(239,68,68,.15); color: var(--danger); }
.badge-yellow { background: rgba(245,158,11,.15); color: var(--warning); }
.badge-blue { background: rgba(79,70,229,.15); color: var(--primary); }

/* Pagination */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 16px; }
.pagination button { padding: 6px 14px; border: 1px solid var(--border); border-radius: 6px; background: var(--bg); cursor: pointer; color: var(--text); }
.pagination button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination button:disabled { opacity: .4; cursor: not-allowed; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 5000; display: flex; align-items: center; justify-content: center; padding: 20px; animation: fadeIn .2s; }
.modal { background: var(--card); border-radius: var(--radius); width: 100%; max-width: 500px; max-height: 85vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 1.1rem; }
.modal-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--text3); line-height: 1; }
.modal-body { padding: 20px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; padding: 16px 20px; border-top: 1px solid var(--border); }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* Announcement banner */
.announcement-bar { background: linear-gradient(135deg, var(--warning), #f97316); color: #fff; padding: 8px 20px; font-size: .85rem; text-align: center; cursor: pointer; }
.announcement-bar:hover { opacity: .9; }

/* ====== Responsive ====== */
@media (max-width: 768px) {
  .player-layout { flex-direction: column; }
  .chat-panel { width: 100%; height: 45vh; border-left: none; border-top: 1px solid var(--border); }
  .video-area { min-height: 30vh; }
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; padding: 8px; gap: 4px; overflow-x: auto; }
  .admin-sidebar .logo { padding: 8px 12px; margin-bottom: 0; border-bottom: none; border-right: 1px solid var(--border); white-space: nowrap; font-size: 1rem; display: flex; align-items: center; }
  .admin-sidebar .nav-item { padding: 8px 12px; border-left: none; border-bottom: 2px solid transparent; font-size: .8rem; white-space: nowrap; }
  .admin-sidebar .nav-item.active { border-bottom-color: var(--primary); border-left-color: transparent; }
  .admin-sidebar .sidebar-footer { display: none; }
  .admin-content { padding: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .table-container { overflow-x: auto; }
  table { min-width: 600px; }
  .auth-card { padding: 24px; }
  .stream-selector { padding: 6px 12px; }
  .player-header { padding: 8px 12px; flex-wrap: wrap; }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .chat-panel { height: 50vh; }
}

/* Utility */
.hidden { display: none !important; }
.mt-2 { margin-top: 8px; } .mt-4 { margin-top: 16px; } .mb-2 { margin-bottom: 8px; } .mb-4 { margin-bottom: 16px; }
.flex { display: flex; } .items-center { align-items: center; } .gap-2 { gap: 8px; } .gap-4 { gap: 16px; }
.text-sm { font-size: .85rem; } .text-xs { font-size: .75rem; } .text-muted { color: var(--text3); }
.w-full { width: 100%; }