/* ============================================================
   停车场余位数据管理系统 · 深色主题
   覆盖 Bootstrap 5.1 浅色默认，统一暗色设计令牌
   ============================================================ */
:root {
    --bg: #0b1220;
    --bg-grad-1: #0d1628;
    --bg-grad-2: #0a0f1c;
    --surface: #151e30;
    --surface-2: #1b273d;
    --surface-hover: #20304a;
    --border: #28344b;
    --border-soft: #222d42;
    --text: #e6edf7;
    --text-muted: #93a2bd;
    --text-dim: #66758f;
    --primary: #3b82f6;
    --primary-strong: #2563eb;
    --primary-soft: rgba(59, 130, 246, .15);
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --radius: 14px;
    --radius-sm: 9px;
    --shadow: 0 6px 24px rgba(0, 0, 0, .35);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, .25);
}

html { position: relative; min-height: 100%; }

body {
    margin-bottom: 64px;
    background:
        radial-gradient(1200px 600px at 80% -10%, rgba(59,130,246,.10), transparent 60%),
        linear-gradient(180deg, var(--bg-grad-1), var(--bg-grad-2)) fixed;
    color: var(--text);
    font-family: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    letter-spacing: .1px;
}

::selection { background: var(--primary-soft); }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2a3754; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #3a4d72; }

/* ---------- 导航栏 ---------- */
.app-navbar {
    background: rgba(13, 20, 36, .85) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 16px rgba(0, 0, 0, .3);
}
.app-navbar .navbar-brand {
    font-weight: 700;
    letter-spacing: .3px;
    color: #fff !important;
}
.app-navbar .nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    padding: .45rem .9rem !important;
    border-radius: 8px;
    margin: 0 .1rem;
    transition: all .15s ease;
}
.app-navbar .nav-link:hover { color: #fff !important; background: rgba(255,255,255,.06); }
.app-navbar .nav-link.active {
    color: #fff !important;
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, .4);
}

/* ---------- 页头 ---------- */
.page-head { margin: .25rem 0 1.25rem; }
.page-head h2, .page-head h1 {
    font-weight: 700;
    margin: 0;
    font-size: 1.5rem;
}
.page-head .sub { color: var(--text-muted); font-size: .85rem; }

/* ---------- 卡片 ---------- */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    color: var(--text);
}
.card-header {
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
    color: var(--text);
    font-weight: 600;
    border-radius: var(--radius) var(--radius) 0 0 !important;
}
.card-body { color: var(--text); }

/* ---------- 统计卡 ---------- */
.stat-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.25rem;
    background: linear-gradient(135deg, var(--surface-2), var(--surface));
    box-shadow: var(--shadow-sm);
    transition: transform .18s ease, box-shadow .18s ease;
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.stat-card .stat-icon {
    position: absolute; right: 14px; top: 12px;
    font-size: 2.4rem; opacity: .18; line-height: 1;
}
.stat-card .stat-label { color: var(--text-muted); font-size: .82rem; font-weight: 500; }
.stat-card .stat-value { font-size: 2.1rem; font-weight: 800; line-height: 1.15; }
.stat-card .accent-bar { height: 3px; border-radius: 3px; margin-top: .6rem; width: 46px; }
.sc-primary .stat-value { color: #60a5fa; } .sc-primary .accent-bar { background: var(--primary); }
.sc-success .stat-value { color: #4ade80; } .sc-success .accent-bar { background: var(--success); }
.sc-warning .stat-value { color: #fbbf24; } .sc-warning .accent-bar { background: var(--warning); }
.sc-info    .stat-value { color: #22d3ee; } .sc-info .accent-bar { background: var(--info); }

/* ---------- 余位单元格 ---------- */
.slot-cell {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: .55rem .35rem;
    background: var(--surface-2);
    height: 100%;
    transition: border-color .15s ease;
}
.slot-cell:hover { border-color: #3a4d72; }
.slot-cell .slot-name { font-size: .72rem; color: var(--text-muted); margin-bottom: .15rem; }
.slot-cell .slot-num  { font-size: 1.35rem; font-weight: 700; }
.slot-empty .slot-num { color: var(--text-dim); }
.slot-high .slot-num  { color: #4ade80; }
.slot-mid  .slot-num  { color: #fbbf24; }
.slot-low  .slot-num  { color: #f87171; }

/* ---------- 表格 ---------- */
/* 关键：强制覆盖 Bootstrap 默认 #212529 深色文字与白底，统一为深色主题 */
.table {
    --bs-table-bg: transparent;
    --bs-table-color: #e6edf7;
    --bs-table-striped-bg: transparent;
    --bs-table-striped-color: #e6edf7;
    --bs-table-hover-bg: transparent;
    --bs-table-hover-color: #ffffff;
    --bs-table-accent-bg: transparent;
    color: #e6edf7;
    border-color: var(--border);
    margin-bottom: 0;
    background: var(--surface);
}
/* 所有单元格统一淡色文字 + 明显边框 */
.table > :not(caption) > * > * {
    color: #e6edf7 !important;
    background-color: transparent;
    border-color: var(--border);
    padding: .68rem .8rem;
    box-shadow: none !important;
}
/* 斑马纹：奇偶行明显区分（深浅交替，非纯黑） */
.table > tbody > tr:nth-of-type(odd)  > * { background-color: #1c2740 !important; }
.table > tbody > tr:nth-of-type(even) > * { background-color: #161f33 !important; }
.table tbody tr { transition: background-color .12s ease; }
.table > tbody > tr:hover > * { background-color: #294063 !important; color: #fff !important; }
.table code { color: #93c5fd; }
.table thead th, .table > thead.table-light th {
    background: #223150 !important;
    color: #b9c6dd !important;
    border-bottom: 2px solid var(--primary) !important;
    border-color: var(--border) !important;
    text-transform: none;
    font-weight: 700;
    font-size: .82rem;
    letter-spacing: .3px;
    white-space: nowrap;
}
.table-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.table-card .table { border-radius: 0; }
.table-bordered { border: none; }

/* ---------- 徽章 / 状态点 ---------- */
.badge { font-weight: 600; letter-spacing: .2px; padding: .4em .65em; border-radius: 7px; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: .4rem; vertical-align: middle; }
.status-dot.on  { background: var(--success); box-shadow: 0 0 0 3px rgba(34,197,94,.18); }
.status-dot.off { background: var(--danger);  box-shadow: 0 0 0 3px rgba(239,68,68,.18); }

/* ---------- 表单 ---------- */
.form-control, .form-select {
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: var(--radius-sm);
}
.form-control::placeholder { color: var(--text-dim); }
.form-control:focus, .form-select:focus {
    background: var(--surface-2);
    color: var(--text);
    border-color: var(--primary);
    box-shadow: 0 0 0 .2rem var(--primary-soft);
}
.form-select option { background: var(--surface); color: var(--text); }
.form-label { color: var(--text-muted); font-weight: 500; font-size: .85rem; margin-bottom: .3rem; }
.form-text { color: var(--text-dim); }

/* ---------- 按钮 ---------- */
.btn { border-radius: var(--radius-sm); font-weight: 600; }
.btn-primary { background: var(--primary); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-strong); border-color: var(--primary-strong); }
.btn-secondary { background: #2a3754; border-color: #2a3754; }
.btn-secondary:hover { background: #344467; border-color: #344467; }
.btn-outline-primary { color: #60a5fa; border-color: #2f5ca8; }
.btn-outline-primary:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-outline-secondary { color: var(--text-muted); border-color: var(--border); }
.btn-outline-secondary:hover { background: #2a3754; color: #fff; border-color: #2a3754; }
.btn-outline-danger { color: #f87171; border-color: #6f2a2a; }
.btn-outline-danger:hover { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-outline-warning { color: #fbbf24; border-color: #7a5616; }
.btn-outline-warning:hover { background: var(--warning); border-color: var(--warning); color: #1a1206; }
.btn-outline-success { color: #4ade80; border-color: #1f5f3a; }
.btn-outline-success:hover { background: var(--success); border-color: var(--success); color: #04210f; }

/* ---------- 警告条 ---------- */
.alert { border-radius: var(--radius); border: 1px solid transparent; }
.alert-success { background: rgba(34,197,94,.12); border-color: rgba(34,197,94,.3); color: #86efac; }
.alert-danger  { background: rgba(239,68,68,.12); border-color: rgba(239,68,68,.3); color: #fca5a5; }
.alert-info    { background: rgba(6,182,212,.12); border-color: rgba(6,182,212,.3); color: #67e8f9; }
.alert-warning { background: rgba(245,158,11,.12); border-color: rgba(245,158,11,.3); color: #fcd34d; }

/* ---------- 手风琴 ---------- */
.accordion { --bs-accordion-bg: var(--surface); --bs-accordion-border-color: var(--border); border-radius: var(--radius); overflow: hidden; }
.accordion-item { background: var(--surface); border-color: var(--border); }
.accordion-button { background: var(--surface-2); color: var(--text); font-weight: 600; }
.accordion-button:not(.collapsed) { background: var(--primary-soft); color: #93c5fd; box-shadow: none; }
.accordion-button:focus { box-shadow: none; border-color: var(--border); }
.accordion-button::after { filter: invert(.7); }
.accordion-body { background: var(--surface); color: var(--text); }

/* ---------- 代码 / 预格式 ---------- */
code { color: #93c5fd; background: rgba(59,130,246,.1); padding: .12rem .4rem; border-radius: 5px; font-size: .82rem; }
pre { background: #0c1322 !important; border: 1px solid var(--border); border-radius: var(--radius-sm); color: #cbd5e1; padding: .8rem !important; font-size: .78rem; }
pre code { background: none; padding: 0; }

/* ---------- 链接 ---------- */
a { color: #60a5fa; text-decoration: none; }
a:hover { color: #93c5fd; }

/* ---------- 页脚 ---------- */
.footer {
    position: absolute; bottom: 0; width: 100%; height: 60px; line-height: 60px;
    background: rgba(11,18,32,.85);
    border-top: 1px solid var(--border) !important;
    color: var(--text-dim) !important;
    font-size: .82rem;
}

/* ---------- 杂项 ---------- */
hr { border-color: var(--border); opacity: 1; }
.text-muted { color: var(--text-muted) !important; }
.btn-close { filter: invert(1) grayscale(1) brightness(1.6); }