/*
 * 檔案名稱：assets/css/admin.css
 * 修改日期：2026/10/04 09:28（UTC+8）
 * 檔案用途：後台電腦／平板／手機響應式介面。
 * 修改說明：固定可收合左側選單、列表、Modal 與表格樣式。
 */

:root {
    --admin-bg: #f5f6f8;
    --admin-surface: #fff;
    --admin-line: #e1e4e8;
    --admin-text: #2f3338;
    --admin-muted: #69717a;
    --admin-primary: #245ea8;
    --admin-primary-soft: #eef5ff;
    --admin-danger: #c84a4a;
    --admin-success: #2c8a5b;
    --sidebar: #18263a;
    --sidebar-active: #2b5f9d;
}

* {
    box-sizing: border-box;
}

body.admin-body {
    margin: 0;
    min-height: 100vh;
    font-family: "Noto Sans TC", "Segoe UI", Arial, sans-serif;
    color: var(--admin-text);
    background: var(--admin-bg);
}

.admin-shell {
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr);
    min-height: 100vh;
    transition: grid-template-columns 0.2s ease;
}

.admin-shell.sidebar-collapsed {
    grid-template-columns: 74px minmax(0, 1fr);
}

.admin-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    color: #fff;
    background: var(--sidebar);
}

.admin-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 68px;
    padding: 14px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.admin-brand-icon {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    flex: 0 0 38px;
    border-radius: 10px;
    background: rgba(255,255,255,0.12);
}

.admin-brand-text {
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
}

.admin-shell.sidebar-collapsed .admin-brand-text,
.admin-shell.sidebar-collapsed .menu-label,
.admin-shell.sidebar-collapsed .sidebar-section-title {
    display: none;
}

.sidebar-section-title {
    padding: 18px 16px 8px;
    font-size: 0.75rem;
    opacity: 0.56;
}

.admin-menu {
    display: grid;
    gap: 4px;
    padding: 8px;
}

.admin-menu a {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 44px;
    padding: 9px 12px;
    border-radius: 10px;
    color: rgba(255,255,255,0.86);
    text-decoration: none;
}

.admin-menu a:hover,
.admin-menu a.active {
    color: #fff;
    background: var(--sidebar-active);
}

.menu-icon {
    width: 24px;
    flex: 0 0 24px;
    text-align: center;
}

.admin-main {
    min-width: 0;
}

.admin-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 68px;
    padding: 10px 20px;
    border-bottom: 1px solid var(--admin-line);
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(10px);
}

.sidebar-toggle {
    position: fixed;
    top: 76px;
    left: 232px;
    z-index: 25;
    width: 30px;
    height: 42px;
    border: 1px solid var(--admin-line);
    border-radius: 0 10px 10px 0;
    background: #fff;
    cursor: pointer;
    transition: left 0.2s ease;
}

.admin-shell.sidebar-collapsed .sidebar-toggle {
    left: 58px;
}

.admin-topbar-left,
.admin-topbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.admin-page-title {
    margin: 0;
    font-size: 1.2rem;
}

.admin-content {
    padding: 20px;
}

.admin-card {
    margin-bottom: 18px;
    padding: 18px;
    border: 1px solid var(--admin-line);
    border-radius: 16px;
    background: var(--admin-surface);
    box-shadow: 0 4px 12px rgba(26, 40, 58, 0.04);
}

.admin-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.admin-card-header h2,
.admin-card-header h3 {
    margin: 0;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.stat-card {
    padding: 16px;
    border: 1px solid var(--admin-line);
    border-radius: 14px;
    background: #fff;
}

.stat-card span {
    color: var(--admin-muted);
}

.stat-card strong {
    display: block;
    margin-top: 8px;
    font-size: 1.55rem;
    color: var(--admin-primary);
}

.table-wrap {
    width: 100%;
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

.admin-table th,
.admin-table td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--admin-line);
    text-align: left;
    vertical-align: middle;
}

.admin-table th {
    color: #4d5965;
    background: #f7f9fb;
    font-weight: 800;
}

.admin-table tbody tr[data-clickable="1"] {
    cursor: pointer;
}

.admin-table tbody tr[data-clickable="1"]:hover {
    background: var(--admin-primary-soft);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 9px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 800;
    background: #eef1f4;
    color: #53606c;
}

.badge.success {
    color: #28744e;
    background: #e8f7ef;
}

.badge.warning {
    color: #816123;
    background: #fff5d9;
}

.badge.danger {
    color: #913f3f;
    background: #fdecec;
}

.badge.info {
    color: #345e9a;
    background: #eaf2ff;
}

.admin-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 8px 13px;
    border: 1px solid var(--admin-line);
    border-radius: 10px;
    color: #34404b;
    text-decoration: none;
    background: #fff;
    cursor: pointer;
}

.admin-btn.primary {
    color: #fff;
    border-color: var(--admin-primary);
    background: var(--admin-primary);
}

.admin-btn.danger {
    color: #fff;
    border-color: var(--admin-danger);
    background: var(--admin-danger);
}

.admin-btn.success {
    color: #fff;
    border-color: var(--admin-success);
    background: var(--admin-success);
}

.admin-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.admin-form-grid .span-2 {
    grid-column: 1 / -1;
}

.admin-form-grid label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-weight: 700;
    color: #4b5661;
}

.admin-form-grid input,
.admin-form-grid select,
.admin-form-grid textarea,
.admin-login-card input,
.admin-login-card select {
    width: 100%;
    min-height: 43px;
    padding: 9px 11px;
    border: 1px solid #ccd3da;
    border-radius: 9px;
    background: #fff;
}

.admin-form-grid textarea {
    min-height: 90px;
    resize: vertical;
}

.admin-login-body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, #eef3f8, #f8fafc);
}

.admin-login-card {
    width: min(460px, 100%);
    padding: 26px;
    border: 1px solid var(--admin-line);
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 18px 50px rgba(28, 48, 72, 0.12);
}

.admin-login-card h1 {
    margin: 0 0 6px;
}

.admin-login-card form {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.captcha-row {
    display: grid;
    grid-template-columns: 1fr 150px 44px;
    gap: 8px;
    align-items: center;
}

.captcha-image {
    width: 150px;
    height: 48px;
    border: 1px solid var(--admin-line);
    border-radius: 9px;
    background: #f7f9fb;
    cursor: pointer;
}

.admin-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 18px;
    background: rgba(17, 27, 39, 0.58);
}

.admin-modal-backdrop.show {
    display: flex;
}

.admin-modal {
    width: min(720px, 100%);
    max-height: min(82vh, 780px);
    overflow: hidden;
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 24px 70px rgba(0,0,0,0.2);
}

.admin-modal-header,
.admin-modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--admin-line);
}

.admin-modal-footer {
    justify-content: flex-end;
    border-top: 1px solid var(--admin-line);
    border-bottom: none;
}

.admin-modal-body {
    max-height: calc(82vh - 120px);
    overflow-y: auto;
    padding: 16px;
}

@media (max-width: 920px) {
    .stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .admin-shell,
    .admin-shell.sidebar-collapsed {
        grid-template-columns: 1fr;
    }

    .admin-sidebar {
        position: fixed;
        left: -280px;
        z-index: 50;
        width: 260px;
        transition: left 0.2s ease;
        box-shadow: 10px 0 30px rgba(0,0,0,0.2);
    }

    .admin-shell.mobile-sidebar-open .admin-sidebar {
        left: 0;
    }

    .sidebar-toggle,
    .admin-shell.sidebar-collapsed .sidebar-toggle {
        position: static;
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }

    .admin-topbar {
        position: sticky;
        padding: 10px 12px;
    }

    .admin-content {
        padding: 12px;
    }

    .stat-grid {
        grid-template-columns: 1fr;
    }

    .admin-form-grid {
        grid-template-columns: 1fr;
    }

    .admin-form-grid .span-2 {
        grid-column: auto;
    }

    .captcha-row {
        grid-template-columns: 1fr 120px 44px;
    }

    .captcha-image {
        width: 120px;
    }
}