/* AiKai responsive styles - desktop + H5 */
:root {
  --primary: #ff4d6d;
  --primary-dark: #c9184a;
  --bg: #0f0f1a;
  --surface: #1a1a2e;
  --surface-2: #232342;
  --text: #f5f5f7;
  --muted: #a0a0b8;
  --border: #2a2a44;
  --gold: #ffd166;
  --ok: #06d6a0;
  --danger: #ef476f;
  --radius: 10px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg); color: var(--text);
  font-family: -apple-system, "PingFang TC", "Microsoft JhengHei",
    "Noto Sans TC", "Helvetica Neue", Arial, sans-serif; font-size: 15px; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.content { min-height: 60vh; padding: 24px 16px; }

/* topbar */
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.topbar-inner { display: flex; align-items: center; gap: 16px; height: 60px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; color: var(--primary); }
.brand img { height: 32px; }
.topnav { display: flex; gap: 14px; flex: 1; }
.topnav a { padding: 8px 6px; color: var(--text); font-size: 15px; border-bottom: 2px solid transparent; }
.topnav a:hover, .topnav a.active { color: var(--primary); border-bottom-color: var(--primary); }
.topright { display: flex; align-items: center; gap: 10px; }
.search-box { display: flex; background: var(--surface-2); border-radius: 20px; padding: 2px 4px; }
.search-box input { background: transparent; border: 0; color: var(--text); padding: 6px 10px; outline: none; min-width: 120px; }
.search-box button { background: transparent; border: 0; color: var(--muted); cursor: pointer; }
.lang-switch select { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); padding: 6px 8px; border-radius: 6px; }
.coins-pill { background: linear-gradient(135deg, #ffd166, #ffa500); color: #4a2c00; padding: 4px 10px; border-radius: 20px; font-weight: 700; font-size: 13px; }
.avatar-link { display: flex; align-items: center; gap: 6px; }
.avatar { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.avatar.placeholder { background: var(--surface-2); display: flex; align-items: center; justify-content: center; color: var(--muted); font-weight: 700; }
.nick { font-size: 13px; }
.btn-login, .btn-register, .btn-logout { padding: 8px 14px; border-radius: 8px; font-weight: 600; font-size: 14px; }
.btn-login { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-register { background: var(--primary); color: #fff; }
.btn-logout { background: transparent; color: var(--muted); }
.hamburger { display: none; background: transparent; border: 0; color: var(--text); font-size: 24px; cursor: pointer; }

/* announcement bar */
.announcement-bar { background: linear-gradient(90deg, var(--primary-dark), var(--primary)); color: #fff; font-size: 13px; padding: 6px 0; }
.announcement-bar .container { display: flex; gap: 16px; flex-wrap: wrap; }

/* cards grid */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform .15s; }
.card:hover { transform: translateY(-2px); }
.card-cover { aspect-ratio: 16/9; background: var(--surface-2); position: relative; overflow: hidden; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; }
.card-cover .live-badge { position: absolute; top: 8px; left: 8px; background: var(--danger); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 700; }
.card-cover .viewers { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,.6); color: #fff; padding: 2px 6px; border-radius: 4px; font-size: 12px; }
.card-body { padding: 10px; }
.card-title { font-weight: 600; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-meta { color: var(--muted); font-size: 12px; margin-top: 4px; display: flex; justify-content: space-between; }
.card-price { color: var(--gold); font-weight: 700; }

/* section */
.section-title { font-size: 20px; font-weight: 700; margin: 18px 0 12px; display: flex; justify-content: space-between; align-items: center; }
.section-title a { font-size: 13px; color: var(--muted); }

/* forms */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; color: var(--muted); font-size: 13px; }
.form-control, input, select, textarea { width: 100%; padding: 10px 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 14px; font-family: inherit; }
textarea { min-height: 80px; resize: vertical; }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; border: 0; background: var(--primary); color: #fff; font-weight: 600; cursor: pointer; font-size: 14px; }
.btn-secondary { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-ok { background: var(--ok); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* table */
.table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: var(--radius); overflow: hidden; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.table th { background: var(--surface-2); color: var(--muted); font-weight: 600; }
.table tr:last-child td { border-bottom: 0; }

/* flashes */
.flashes { margin-bottom: 12px; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 8px; font-size: 14px; }
.flash-success { background: rgba(6,214,160,.15); color: var(--ok); border: 1px solid var(--ok); }
.flash-danger { background: rgba(239,71,111,.15); color: var(--danger); border: 1px solid var(--danger); }
.flash-warning { background: rgba(255,209,102,.15); color: var(--gold); border: 1px solid var(--gold); }
.flash-info { background: var(--surface-2); color: var(--text); }

/* layout helpers */
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 0; }
.muted { color: var(--muted); }
.center { text-align: center; }
.right { text-align: right; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; }

/* auth */
.auth-wrap { max-width: 420px; margin: 40px auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.auth-wrap h1 { margin-bottom: 18px; font-size: 22px; }
.auth-wrap .role-tabs { display: flex; gap: 6px; margin-bottom: 18px; }
.auth-wrap .role-tabs button { flex: 1; padding: 10px; background: var(--surface-2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; cursor: pointer; }
.auth-wrap .role-tabs button.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.auth-wrap .close-x { float: right; font-size: 22px; color: var(--muted); cursor: pointer; background: transparent; border: 0; }
.auth-wrap .links { display: flex; justify-content: space-between; margin-top: 12px; font-size: 13px; color: var(--muted); }
.qr-box { text-align: center; padding: 16px; background: #fff; border-radius: 8px; display: inline-block; }
.qr-box img { width: 200px; height: 200px; }
.tip-box { background: var(--surface-2); padding: 12px; border-radius: 8px; font-size: 13px; color: var(--muted); margin: 12px 0; }

/* live room */
.live-room { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
.live-video { position: relative; aspect-ratio: 16/9; background: #000; border-radius: var(--radius); overflow: hidden; }
.live-video video { display: block; width: 100%; height: 100%; }
.live-video .live-badge { position: absolute; top: 8px; left: 8px; background: var(--danger); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 700; z-index: 2; }
.live-overlay { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,.55); color: #ddd; text-align: center; z-index: 1; }
.live-overlay-inner p { margin: 4px 0; }
.live-overlay-inner p:first-child { font-size: 16px; font-weight: 600; }
.live-chat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); display: flex; flex-direction: column; height: 70vh; }
.live-chat-header { padding: 10px 12px; border-bottom: 1px solid var(--border); font-weight: 700; }
.live-chat-msgs { flex: 1; overflow-y: auto; padding: 10px; }
.chat-msg { padding: 6px 8px; border-radius: 6px; margin-bottom: 4px; font-size: 13px; }
.chat-msg.ann { background: rgba(255,209,102,.15); color: var(--gold); font-weight: 600; }
.chat-msg .nick { color: var(--primary); margin-right: 6px; font-weight: 600; }
.live-chat-input { padding: 8px; border-top: 1px solid var(--border); display: flex; gap: 6px; }
.live-chat-input input { flex: 1; }
.live-stats { display: flex; gap: 16px; padding: 10px 12px; background: var(--surface-2); border-radius: 8px; margin-bottom: 12px; }
.live-stats div { font-size: 13px; color: var(--muted); }
.live-stats span { color: var(--gold); font-weight: 700; }
.gift-panel { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 8px; }
.gift-item { background: var(--surface-2); padding: 10px; border-radius: 8px; text-align: center; cursor: pointer; }
.gift-item:hover { background: var(--primary); }
.gift-item .price { color: var(--gold); font-size: 12px; }

/* video detail */
.video-detail { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.video-player { background: #000; border-radius: var(--radius); aspect-ratio: 16/9; }
.video-info h1 { font-size: 20px; margin-bottom: 8px; }
.video-info .meta { color: var(--muted); font-size: 13px; margin-bottom: 12px; }

/* admin */
.admin-wrap { display: grid; grid-template-columns: 220px 1fr; gap: 16px; min-height: 70vh; }
.admin-sidebar { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; position: sticky; top: 80px; max-height: calc(100vh - 100px); overflow-y: auto; }
.admin-sidebar h3 { font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.admin-sidebar a { display: block; padding: 8px 10px; border-radius: 6px; font-size: 14px; color: var(--text); }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--surface-2); color: var(--primary); }
.admin-main { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.stat-card { background: var(--surface-2); padding: 16px; border-radius: var(--radius); }
.stat-card .label { color: var(--muted); font-size: 12px; }
.stat-card .value { font-size: 22px; font-weight: 700; color: var(--gold); }

/* error */
.error-wrap { text-align: center; padding: 80px 20px; }
.error-wrap .code { font-size: 72px; color: var(--primary); }

/* mobile menu */
body.nav-open .topnav { display: flex; position: absolute; top: 60px; left: 0; right: 0; background: var(--surface); flex-direction: column; padding: 12px; border-bottom: 1px solid var(--border); }

/* responsive */
@media (max-width: 960px) {
  .grid-5, .grid-6 { grid-template-columns: repeat(3, 1fr); }
  .live-room { grid-template-columns: 1fr; }
  .live-chat { height: 50vh; }
  .video-detail { grid-template-columns: 1fr; }
  .admin-wrap { grid-template-columns: 1fr; }
  .admin-sidebar { position: static; max-height: none; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .topnav { display: none; }
  .hamburger { display: block; }
  body.nav-open .topnav { display: flex; }
  .grid-2, .grid-3, .grid-4, .grid-5, .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .search-box, .nick { display: none; }
  .topbar-inner { height: auto; padding: 8px 0; }
  .topright { flex-wrap: wrap; gap: 6px; }
  .auth-wrap { margin: 16px; padding: 18px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .table { font-size: 12px; }
  .table th, .table td { padding: 6px 8px; }
}
@media (max-width: 380px) {
  .grid-2, .grid-3, .grid-4, .grid-5, .grid-6 { grid-template-columns: 1fr; }
}