/* ==========================================
   蝙蝠管理后台 - 明亮科技蓝主题
   设计理念：清爽明亮的控制台质感，信号蓝为强调色，细网格纹理保留科技感
   ========================================== */

:root {
    --bg-page: #eff4fb;
    --bg-panel: #ffffff;
    --bg-panel-raised: #f4f8fd;
    --bg-panel-hover: #eaf2fc;
    --border-subtle: #dbe6f4;
    --border-strong: #b9cee6;
    --accent: #1e6fe0;
    --accent-dim: #4f8fe6;
    --accent-soft: #e6f0fd;
    --accent-glow: rgba(30, 111, 224, 0.22);
    --text-primary: #0f2138;
    --text-muted: #5c6c83;
    --text-faint: #9aa8bc;
    --success: #0f9d63;
    --success-soft: rgba(15, 157, 99, 0.08);
    --danger: #e0453c;
    --danger-soft: rgba(224, 69, 60, 0.08);
    --radius: 10px;
    --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "SF Mono", "Consolas", "Menlo", "Courier New", monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font-ui);
    background: var(--bg-page);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-soft); color: var(--accent); }

/* ===== 背景网格纹理（信号意象，克制使用） ===== */
.grid-texture {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        radial-gradient(circle, rgba(30, 111, 224, 0.08) 1px, transparent 1px);
    background-size: 26px 26px;
    z-index: 0;
}

/* ===== 登录页 ===== */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background:
        radial-gradient(ellipse 900px 560px at 50% -8%, rgba(30, 111, 224, 0.10), transparent 60%),
        var(--bg-page);
    padding: 20px;
    overflow: hidden;
}

.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 380px;
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: 0 1px 2px rgba(15, 33, 56, 0.04), 0 20px 50px rgba(30, 111, 224, 0.08);
}

.bat-mark {
    width: 48px;
    height: 48px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft);
    border: 1px solid rgba(30, 111, 224, 0.2);
    border-radius: 12px;
    font-size: 22px;
    box-shadow: 0 0 24px var(--accent-glow);
}

.login-eyebrow {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 2.5px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 8px;
    font-weight: 600;
}

.login-title {
    text-align: center;
    font-size: 19px;
    font-weight: 700;
    margin: 0 0 4px;
    letter-spacing: 0.2px;
}

.login-sub {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin: 0 0 28px;
}

.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-size: 11.5px;
    color: var(--text-muted);
    margin-bottom: 7px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-family: var(--font-mono);
}

.form-input {
    width: 100%;
    padding: 11px 13px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-mono);
    letter-spacing: 0.5px;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
.form-input:focus { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 3px var(--accent-soft); }
.form-input::placeholder { color: var(--text-faint); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 11px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.1s, box-shadow 0.15s;
    font-family: var(--font-ui);
}
.btn:hover { opacity: 0.92; }
.btn:active { transform: scale(0.99); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-amber {
    background: linear-gradient(180deg, #3b82f6, var(--accent));
    color: #ffffff;
    box-shadow: 0 4px 16px rgba(30, 111, 224, 0.28);
}
.btn-outline {
    background: #fff;
    border: 1px solid var(--border-strong);
    color: var(--text-primary);
}
.btn-outline:hover { border-color: var(--accent); }

.login-note {
    margin-top: 18px;
    font-size: 11.5px;
    color: var(--text-faint);
    text-align: center;
    line-height: 1.7;
}

.status-msg {
    font-size: 13px;
    margin-top: 12px;
    text-align: center;
    min-height: 18px;
}
.status-msg.ok { color: var(--success); }
.status-msg.err { color: var(--danger); }

.pulse-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
    margin-right: 6px;
    animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.35; transform: scale(0.7); }
}
@media (prefers-reduced-motion: reduce) {
    .pulse-dot { animation: none; }
}

/* ===== 后台整体布局 ===== */
.app-shell {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

.sidebar {
    width: 224px;
    flex-shrink: 0;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-subtle);
    padding: 22px 14px;
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 8px 6px;
    font-weight: 700;
    font-size: 15px;
}
.sidebar-brand .mark {
    width: 32px; height: 32px;
    background: var(--accent-soft);
    border: 1px solid rgba(30, 111, 224, 0.18);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
}
.sidebar-eyebrow {
    font-family: var(--font-mono);
    font-size: 9.5px;
    letter-spacing: 2px;
    color: var(--text-faint);
    text-transform: uppercase;
    padding: 0 8px 20px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 14px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 6px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13.5px;
    margin-bottom: 2px;
    border-left: 2px solid transparent;
    transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.nav-item:hover { background: var(--bg-panel-hover); color: var(--text-primary); }
.nav-item.active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
    border-left-color: var(--accent);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}
.sidebar-user {
    font-size: 12px;
    color: var(--text-muted);
    padding: 6px 8px 10px;
    font-family: var(--font-mono);
}
.logout-link {
    display: block;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-faint);
    text-decoration: none;
    border-radius: 6px;
}
.logout-link:hover { background: var(--danger-soft); color: var(--danger); }

.main {
    flex: 1;
    padding: 30px 36px;
    max-width: 1240px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 10px;
}
.page-title { font-size: 21px; font-weight: 700; margin: 0; letter-spacing: 0.2px; }
.page-sub { font-size: 13px; color: var(--text-muted); margin: 5px 0 0; }

/* ===== 卡片/统计 ===== */
.stat-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 18px 20px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(15, 33, 56, 0.03);
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0.7;
}
.stat-num { font-size: 26px; font-weight: 700; font-family: var(--font-mono); color: var(--text-primary); }
.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-family: var(--font-mono);
}

.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(15, 33, 56, 0.03);
}
.panel-head {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    background: var(--bg-panel-raised);
}
.panel-head h2 {
    font-size: 13px;
    margin: 0;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    font-family: var(--font-mono);
    color: var(--text-muted);
}

/* ===== 表格 ===== */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
    text-align: left;
    padding: 11px 20px;
    color: var(--text-faint);
    font-weight: 600;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-family: var(--font-mono);
    border-bottom: 1px solid var(--border-subtle);
    white-space: nowrap;
    background: var(--bg-panel-raised);
}
tbody td {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-subtle);
    font-family: var(--font-mono);
    color: var(--text-primary);
}
tbody tr { position: relative; transition: background 0.1s; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-panel-hover); }
tbody tr:hover td:first-child { box-shadow: inset 2px 0 0 var(--accent); }
.cell-muted { color: var(--text-muted); font-family: var(--font-ui); }
.empty-row td {
    text-align: center;
    padding: 44px 18px;
    color: var(--text-faint);
    font-family: var(--font-ui);
}

/* ===== 表单元素（搜索框/按钮） ===== */
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; }
.input-sm {
    padding: 8px 12px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 13px;
    font-family: var(--font-mono);
    outline: none;
    transition: border-color 0.15s, background 0.15s;
}
.input-sm:focus { border-color: var(--accent); background: #fff; }

.btn-sm {
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 12.5px;
    border: none;
    cursor: pointer;
    font-family: var(--font-ui);
    transition: opacity 0.15s;
}
.btn-sm.amber {
    background: linear-gradient(180deg, #3b82f6, var(--accent));
    color: #ffffff;
    font-weight: 600;
}
.btn-sm.outline { background: #fff; border: 1px solid var(--border-strong); color: var(--text-primary); }
.btn-sm.outline:hover { border-color: var(--accent); }
.btn-sm.danger-outline { background: #fff; border: 1px solid rgba(224,69,60,0.3); color: var(--danger); }
.btn-sm:hover { opacity: 0.88; }

/* ===== 分页 ===== */
.pagination {
    display: flex;
    gap: 6px;
    padding: 15px 20px;
    justify-content: flex-end;
    align-items: center;
    flex-wrap: wrap;
    background: var(--bg-panel-raised);
}
.pagination a, .pagination span {
    padding: 6px 11px;
    border-radius: 5px;
    font-size: 12px;
    font-family: var(--font-mono);
    text-decoration: none;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
    background: #fff;
}
.pagination a:hover { color: var(--text-primary); border-color: var(--accent); }
.pagination .current { background: var(--accent); color: #fff; border-color: var(--accent); font-weight: 600; }

/* ===== 数据管理 - 文件列表 & 编辑 ===== */
.file-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0;
}
.file-grid > .file-list { border-right: 1px solid var(--border-subtle); }
.file-list { max-height: 560px; overflow-y: auto; }
.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    border-left: 2px solid transparent;
    cursor: pointer;
    font-size: 13px;
    transition: background 0.1s, border-color 0.1s;
}
.file-item:hover { background: var(--bg-panel-hover); }
.file-item.active { background: var(--accent-soft); border-left-color: var(--accent); }
.file-item .fname { font-family: var(--font-mono); }
.file-item .fcount { font-size: 10.5px; color: var(--text-faint); font-family: var(--font-mono); }

.editor-area {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.textarea-lg {
    width: 100%;
    min-height: 420px;
    background: var(--bg-page);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.7;
    padding: 14px;
    resize: vertical;
    outline: none;
    transition: border-color 0.15s, background 0.15s;
}
.textarea-lg:focus { border-color: var(--accent); background: #fff; }

.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 4px;
    font-size: 11px;
    background: var(--accent-soft);
    color: var(--accent);
    font-family: var(--font-mono);
    border: 1px solid rgba(30, 111, 224, 0.15);
}

@media (max-width: 860px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; overflow-x: auto; padding: 12px; }
    .sidebar-brand, .sidebar-eyebrow { display: none; }
    .sidebar-footer { display: none; }
    .nav-item { white-space: nowrap; }
    .main { padding: 20px; }
    .file-grid { grid-template-columns: 1fr; }
    .file-grid > .file-list { border-right: none; border-bottom: 1px solid var(--border-subtle); }
}