/* ============ 基础样式（登录/大厅/房间/通用） ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: #f2f4f7;
    color: #1f2937;
    -webkit-tap-highlight-color: transparent;
}
a { color: #1a3a6b; text-decoration: none; }
.hidden { display: none !important; }
.win { color: #16a34a !important; }
.lose { color: #dc2626 !important; }
.err { color: #dc2626 !important; }
.empty { color: #9ca3af; text-align: center; padding: 24px 0; }

/* ---------------- 按钮 ---------------- */
.btn {
    display: inline-block;
    border: 0;
    border-radius: 8px;
    padding: 10px 18px;
    font-size: 15px;
    cursor: pointer;
    transition: opacity .15s, transform .1s;
    font-family: inherit;
}
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: linear-gradient(160deg, #2f6fd6, #1a4f9e); color: #fff; }
.btn-outline { background: #fff; border: 1px solid #1a3a6b; color: #1a3a6b; }
.btn-ghost { background: rgba(255, 255, 255, .85); color: #374151; border: 1px solid #d1d5db; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-block { width: 100%; }
.btn-xs { padding: 4px 10px; font-size: 12px; border-radius: 6px; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------------- 顶部导航 ---------------- */
.topbar {
    display: flex; align-items: center; justify-content: space-between;
    background: linear-gradient(160deg, #1c3f73, #16325c);
    color: #fff; padding: 10px 16px; height: 52px;
}
.topbar .logo { color: #fff; font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.tb-right { display: flex; align-items: center; gap: 14px; font-size: 14px; }
.tb-coins b { color: #ffd166; margin-left: 2px; }
.tb-link { color: #c7d7f0; }
.tb-link:hover { color: #fff; }

/* ---------------- 登录/注册 ---------------- */
.auth-wrap {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
    background: linear-gradient(160deg, #123, #1a3a6b 60%, #0e2a4f);
}
.auth-card {
    width: 100%; max-width: 400px;
    background: #fff; border-radius: 14px; padding: 26px 24px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, .35);
}
.auth-logo { text-align: center; font-size: 22px; color: #1a3a6b; margin-bottom: 18px; letter-spacing: 2px; }
.auth-tabs { display: flex; border-bottom: 2px solid #e5e7eb; margin-bottom: 18px; }
.auth-tab {
    flex: 1; background: none; border: 0; padding: 10px 0; font-size: 15px;
    color: #6b7280; cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px;
}
.auth-tab.active { color: #1a3a6b; font-weight: 700; border-bottom-color: #1a3a6b; }
.auth-form label { display: block; font-size: 13px; color: #6b7280; margin: 12px 0 4px; }
.auth-form input {
    width: 100%; padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 8px;
    font-size: 15px; outline: none; font-family: inherit;
}
.auth-form input:focus { border-color: #2f6fd6; }
.auth-form .btn { margin-top: 16px; }
.auth-msg { min-height: 20px; font-size: 13px; color: #16a34a; margin-top: 8px; }
.auth-notice { margin-top: 14px; padding: 10px; background: #f3f6fb; border-radius: 8px; font-size: 13px; color: #5b6b84; }
.cap-row { display: flex; gap: 8px; }
.cap-row input { flex: 1; }
.cap-img { height: 42px; border-radius: 8px; cursor: pointer; border: 1px solid #d1d5db; }
.maint-box { text-align: center; padding: 80px 20px; }
.maint-box h1 { color: #1a3a6b; margin-bottom: 12px; }

/* ---------------- 大厅 ---------------- */
.lobby { max-width: 1080px; margin: 0 auto; padding: 16px; }
.lobby-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 800px) { .lobby-grid { grid-template-columns: 1fr; } }
.card {
    background: #fff; border-radius: 12px; padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, .06);
}
.card h2 { font-size: 17px; color: #1a3a6b; margin-bottom: 14px; }
.lobby-coins {
    background: linear-gradient(160deg, #fef3c7, #fde68a);
    border-radius: 10px; padding: 14px 16px; margin-bottom: 16px;
    display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
.lobby-coins b { font-size: 26px; color: #92400e; }
.lobby-coins small { color: #92400e; opacity: .8; margin-left: auto; }
.field label { font-size: 13px; color: #6b7280; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 16px; }
.chip {
    padding: 8px 16px; border-radius: 20px; border: 1px solid #d1d5db; background: #fff;
    font-size: 14px; cursor: pointer; font-family: inherit;
}
.chip.active { background: #1a3a6b; color: #fff; border-color: #1a3a6b; }
.divider { text-align: center; color: #9ca3af; font-size: 12px; margin: 12px 0; }
.join-row { display: flex; gap: 8px; margin-top: 12px; }
.join-row input {
    flex: 1; padding: 10px 12px; border: 1px solid #d1d5db; border-radius: 8px; font-size: 15px;
    letter-spacing: 4px; outline: none;
}
.tabs { display: flex; gap: 4px; border-bottom: 2px solid #e5e7eb; margin-bottom: 12px; }
.tab {
    background: none; border: 0; padding: 8px 14px; font-size: 14px; color: #6b7280;
    cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -2px;
}
.tab.active { color: #1a3a6b; font-weight: 700; border-bottom-color: #1a3a6b; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { padding: 8px 6px; text-align: left; border-bottom: 1px solid #f1f3f6; white-space: nowrap; }
.tbl th { color: #6b7280; font-weight: 600; }
.page-row { display: flex; align-items: center; justify-content: space-between; margin-top: 10px; font-size: 13px; color: #6b7280; }

/* ---------------- 房间 ---------------- */
.room-page { max-width: 760px; margin: 0 auto; padding: 16px; }
.room { background: #fff; border-radius: 12px; padding: 20px; box-shadow: 0 2px 10px rgba(0,0,0,.06); }
.room-head { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 18px; }
.room-head h2 { font-size: 18px; color: #1a3a6b; }
.room-no { font-size: 24px; letter-spacing: 3px; color: #b45309; }
.room-stake { color: #6b7280; font-size: 13px; margin-top: 4px; }
.room-seats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.rseat {
    border: 2px solid #e5e7eb; border-radius: 12px; padding: 14px 8px; text-align: center;
    background: #fafbfc;
}
.rseat.me { border-color: #2f6fd6; background: #f0f6ff; }
.rseat.empty { border-style: dashed; color: #9ca3af; }
.rseat-ava {
    width: 52px; height: 52px; margin: 0 auto 8px; border-radius: 50%;
    background: linear-gradient(160deg, #2f6fd6, #1a4f9e); color: #fff; font-size: 22px;
    display: flex; align-items: center; justify-content: center;
}
.rseat.empty .rseat-ava { background: #e5e7eb; color: #9ca3af; }
.rseat-name { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.rseat-coins { font-size: 12px; color: #6b7280; margin-bottom: 6px; }
.ready-on { color: #16a34a; font-size: 13px; font-weight: 600; }
.ready-off { color: #9ca3af; font-size: 13px; }
.room-foot .btn { margin-bottom: 10px; }
.room-tip { font-size: 12px; color: #9ca3af; text-align: center; }
.badge-owner { font-style: normal; font-size: 11px; background: #fef3c7; color: #92400e; padding: 1px 6px; border-radius: 4px; margin-left: 4px; }

/* ---------------- 规则页 ---------------- */
.rules { max-width: 720px; margin: 20px auto; background: #fff; border-radius: 12px; padding: 24px; line-height: 1.9; }
.rules h2 { color: #1a3a6b; margin-bottom: 12px; }
.rules h3 { color: #374151; margin: 18px 0 8px; font-size: 16px; }
.rules ul { padding-left: 22px; }
.rules .link { color: #1a3a6b; font-weight: 600; }

/* ---------------- Toast ---------------- */
#toastBox { position: fixed; top: 64px; left: 50%; transform: translateX(-50%); z-index: 9999; display: flex; flex-direction: column; gap: 8px; align-items: center; }
.toast {
    background: rgba(17, 24, 39, .92); color: #fff; padding: 10px 18px; border-radius: 8px;
    font-size: 14px; max-width: 86vw; transition: opacity .3s;
}
.toast.err { background: rgba(220, 38, 38, .92); color: #fff !important; }
.toast.out { opacity: 0; }

/* ===== 游戏菜单 ===== */
.games-menu { max-width: 720px; margin: 0 auto; padding: 24px 16px; }
.menu-title { text-align: center; font-size: 22px; color: #1f2937; margin-bottom: 20px; }
.game-cards { display: flex; flex-direction: column; gap: 14px; }
.game-card {
    display: flex; align-items: center; gap: 14px;
    background: #fff; border-radius: 14px; padding: 18px 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,.07); text-decoration: none;
    transition: transform .15s, box-shadow .15s; border: 2px solid transparent;
}
.game-card:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.12); border-color: #3b82f6; }
.gc-icon { font-size: 40px; flex-shrink: 0; width: 56px; text-align: center; }
.gc-info { flex: 1; }
.gc-info h2 { margin: 0 0 4px; font-size: 18px; color: #1f2937; }
.gc-info p { margin: 0; font-size: 13px; color: #6b7280; line-height: 1.5; }
.gc-arrow { font-size: 28px; color: #9ca3af; flex-shrink: 0; }

@media (min-width: 640px) {
    .game-cards { flex-direction: row; }
    .game-card { flex: 1; flex-direction: column; text-align: center; padding: 28px 20px; }
    .gc-icon { font-size: 52px; width: auto; }
    .gc-arrow { display: none; }
}