/* 管理頁：側邊欄儀表板、Toast、確認對話框與通關碼／註冊設定頁籤樣式（支援深色模式） */

/* ===== 色彩變數 ===== */
:root {
    --bg: #f3f4f8;
    --card: #ffffff;
    --card-border: #e5e7eb;
    --ink: #1f2937;
    --muted: #6b7280;
    --line: #e5e7eb;
    --field: #ffffff;
    --field-border: #cbd5e1;
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-soft: #eef2ff;
    --success: #16a34a;
    --success-soft: #dcfce7;
    --warning: #b45309;
    --warning-soft: #fef3c7;
    --danger: #dc2626;
    --danger-soft: #fee2e2;
    --sidebar: #111827;
    --sidebar-ink: #e5e7eb;
    --sidebar-muted: #9ca3af;
    --shadow: 0 6px 24px rgba(15, 23, 42, 0.08);
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #0b1120;
        --card: #111827;
        --card-border: #1f2937;
        --ink: #f1f5f9;
        --muted: #94a3b8;
        --line: #1f2937;
        --field: #0f172a;
        --field-border: #334155;
        --primary: #818cf8;
        --primary-dark: #6366f1;
        --primary-soft: rgba(99, 102, 241, 0.18);
        --success: #4ade80;
        --success-soft: rgba(34, 197, 94, 0.16);
        --warning: #fbbf24;
        --warning-soft: rgba(245, 158, 11, 0.16);
        --danger: #f87171;
        --danger-soft: rgba(239, 68, 68, 0.16);
        --sidebar: #030712;
        --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
        color-scheme: dark;
    }
}

:root[data-theme="dark"] {
    --bg: #0b1120;
    --card: #111827;
    --card-border: #1f2937;
    --ink: #f1f5f9;
    --muted: #94a3b8;
    --line: #1f2937;
    --field: #0f172a;
    --field-border: #334155;
    --primary: #818cf8;
    --primary-dark: #6366f1;
    --primary-soft: rgba(99, 102, 241, 0.18);
    --success: #4ade80;
    --success-soft: rgba(34, 197, 94, 0.16);
    --warning: #fbbf24;
    --warning-soft: rgba(245, 158, 11, 0.16);
    --danger: #f87171;
    --danger-soft: rgba(239, 68, 68, 0.16);
    --sidebar: #030712;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: 'Noto Sans TC', 'Microsoft JhengHei', system-ui, -apple-system, sans-serif;
    line-height: 1.5;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.auth-loading {
    display: none !important;
}

.loading-screen {
    position: fixed;
    inset: 0;
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    color: var(--muted);
}

/* ===== 版面：側邊欄＋主要區域 ===== */
.admin-shell {
    display: grid;
    grid-template-columns: 248px minmax(0, 1fr);
    min-height: 100vh;
}

.admin-sidebar {
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: 18px;
    height: 100vh;
    padding: 20px 14px;
    background: var(--sidebar);
    color: var(--sidebar-ink);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 8px 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: inherit;
    text-decoration: none;
}

.sidebar-brand img {
    border-radius: 10px;
}

.sidebar-brand span {
    display: grid;
    font-weight: 700;
    line-height: 1.2;
}

.sidebar-brand small {
    color: var(--sidebar-muted);
    font-size: 0.8rem;
    font-weight: 500;
}

/* 側邊欄的功能頁籤（直向） */
.admin-tabs {
    display: grid;
    gap: 4px;
}

.admin-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--sidebar-muted);
    font: inherit;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.admin-tab:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--sidebar-ink);
}

.admin-tab[aria-selected="true"] {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white;
    box-shadow: 0 6px 18px rgba(99, 102, 241, 0.35);
}

.admin-tab:focus-visible,
.sidebar-link:focus-visible,
.sidebar-toggle:focus-visible {
    outline: 3px solid rgba(129, 140, 248, 0.6);
    outline-offset: 2px;
}

.tab-icon {
    width: 1.4em;
    text-align: center;
}

.tab-badge {
    margin-left: auto;
    min-width: 22px;
    padding: 1px 7px;
    border-radius: 999px;
    background: #ef4444;
    color: white;
    font-size: 0.75rem;
    text-align: center;
}

.sidebar-footer {
    display: grid;
    gap: 6px;
    margin-top: auto;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 40px;
    padding: 8px 12px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: var(--sidebar-muted);
    font: inherit;
    text-decoration: none;
    cursor: pointer;
}

.sidebar-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--sidebar-ink);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 6px;
    padding: 10px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
}

.sidebar-user-text {
    display: grid;
    flex: 1 1 auto;
    min-width: 0;
    line-height: 1.3;
}

.sidebar-user-text > span {
    overflow: hidden;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-user-text small {
    color: var(--sidebar-muted);
}

.logout-btn {
    min-height: 34px;
    padding: 4px 10px;
    border: 1px solid rgba(248, 113, 113, 0.5);
    border-radius: 8px;
    background: transparent;
    color: #fca5a5;
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
}

.sidebar-backdrop {
    display: none;
}

.admin-main {
    min-width: 0;
    padding: 24px 28px 48px;
}

.admin-topbar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.admin-topbar h1 {
    margin: 0;
    font-size: 1.6rem;
}

.admin-topbar p {
    margin: 2px 0 0;
    color: var(--muted);
}

.sidebar-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    background: var(--card);
    color: var(--ink);
    font-size: 1.2rem;
    cursor: pointer;
}

.admin-tab-panel[hidden] {
    display: none;
}

/* ===== 統計卡 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.stat-card {
    position: relative;
    display: grid;
    gap: 4px;
    padding: 16px 18px;
    overflow: hidden;
    border: 1px solid var(--card-border);
    border-radius: 16px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.stat-card::after {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    height: 4px;
    background: var(--accent-bar);
    content: '';
}

.stat-pending { --accent-bar: linear-gradient(90deg, #f59e0b, #f97316); }
.stat-approved { --accent-bar: linear-gradient(90deg, #22c55e, #14b8a6); }
.stat-domain { --accent-bar: linear-gradient(90deg, #6366f1, #8b5cf6); }
.stat-code { --accent-bar: linear-gradient(90deg, #0ea5e9, #6366f1); }

.stat-label {
    color: var(--muted);
    font-size: 0.85rem;
}

.stat-card strong {
    font-size: 1.8rem;
    font-variant-numeric: tabular-nums;
}

/* ===== 卡片與用戶清單 ===== */
.admin-card {
    margin-bottom: 18px;
    padding: 18px 20px;
    border: 1px solid var(--card-border);
    border-radius: 16px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.card-heading {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 10px;
}

.card-heading h2 {
    margin: 0;
    font-size: 1.15rem;
}

.card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.search-field input {
    width: min(280px, 100%);
    min-height: 40px;
    padding: 8px 12px;
    border: 1px solid var(--field-border);
    border-radius: 10px;
    background: var(--field);
    color: var(--ink);
    font: inherit;
}

.user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 4px;
    border-top: 1px solid var(--line);
}

.user-item:first-child {
    border-top: 0;
}

.user-item[hidden] {
    display: none;
}

.user-details {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.avatar {
    display: inline-grid;
    flex: 0 0 auto;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-weight: 700;
}

.sidebar-user .avatar {
    width: 36px;
    height: 36px;
}

.user-text {
    min-width: 0;
}

.user-email {
    color: var(--muted);
    font-size: 0.88rem;
    overflow-wrap: anywhere;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.badge {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pending { background: var(--warning-soft); color: var(--warning); }
.badge-approved { background: var(--success-soft); color: var(--success); }
.badge-super { background: var(--primary-soft); color: var(--primary); }
.badge-domain { background: var(--primary-soft); color: var(--primary); }
.badge-code { background: rgba(14, 165, 233, 0.15); color: #0284c7; }
.badge-admin { background: var(--danger-soft); color: var(--danger); }
.badge-muted { background: var(--line); color: var(--muted); }

.protected-label {
    color: var(--muted);
    font-size: 0.85rem;
    white-space: nowrap;
}

.button-group {
    display: flex;
    flex: 0 0 auto;
    gap: 8px;
}

.empty-list {
    padding: 20px;
    color: var(--muted);
    text-align: center;
}

.empty-list.is-error {
    color: var(--danger);
}

/* ===== 按鈕 ===== */
.approve-btn,
.revoke-btn,
.delete-btn,
.soft-btn,
.danger-outline-btn {
    min-height: 38px;
    padding: 7px 14px;
    border: 1px solid transparent;
    border-radius: 10px;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
    transition: transform 0.15s, filter 0.15s;
}

.approve-btn:hover,
.revoke-btn:hover,
.delete-btn:hover,
.soft-btn:hover,
.danger-outline-btn:hover {
    filter: brightness(1.05);
    transform: translateY(-1px);
}

.approve-btn {
    background: linear-gradient(135deg, #22c55e, #16a34a);
    color: white;
}

.revoke-btn {
    background: var(--danger-soft);
    color: var(--danger);
}

.delete-btn,
.danger-outline-btn {
    border-color: var(--danger);
    background: transparent;
    color: var(--danger);
}

.soft-btn {
    border-color: var(--card-border);
    background: var(--primary-soft);
    color: var(--primary);
}

/* ===== Toast（畫面中間下方） ===== */
.admin-toast-region {
    position: fixed;
    left: 50%;
    bottom: 24px;
    z-index: 10000;
    display: grid;
    gap: 8px;
    width: min(420px, calc(100% - 32px));
    transform: translateX(-50%);
    pointer-events: none;
}

.admin-toast {
    padding: 12px 16px;
    border-radius: 10px;
    background: #1f2937;
    color: white;
    text-align: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    animation: admin-toast-in 0.2s ease-out;
    transition: opacity 0.3s, transform 0.3s;
}

.admin-toast-success {
    background: #217a4b;
}

.admin-toast-error {
    background: #b42318;
}

.admin-toast.is-leaving {
    opacity: 0;
    transform: translateY(8px);
}

@keyframes admin-toast-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
}

/* ===== 確認對話框 ===== */
.admin-dialog {
    width: min(440px, calc(100% - 32px));
    padding: 22px;
    border: 0;
    border-radius: 16px;
    background: var(--card);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    color: var(--ink);
}

.admin-dialog::backdrop {
    background: rgba(17, 24, 39, 0.55);
}

.admin-dialog h2 {
    margin: 0 0 10px;
    font-size: 1.15rem;
}

.admin-dialog p {
    margin: 0 0 16px;
    line-height: 1.6;
}

.admin-dialog-label {
    display: grid;
    gap: 6px;
    margin-bottom: 16px;
    font-weight: 700;
}

.admin-dialog-input {
    min-height: 44px;
    padding: 8px 12px;
    border: 1px solid var(--field-border);
    border-radius: 10px;
    background: var(--field);
    color: var(--ink);
    font: inherit;
}

.admin-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.admin-dialog-actions button {
    min-height: 40px;
    padding: 8px 16px;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    background: var(--card);
    color: var(--ink);
    font: inherit;
    cursor: pointer;
}

.admin-dialog-confirm.is-danger {
    border-color: #b42318;
    background: #b42318;
    color: white;
}

.admin-dialog-actions button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

button[aria-busy="true"] {
    cursor: wait;
}

/* ===== 通關碼頁籤（樣式限定在面板內） ===== */
.access-codes-panel {
    --ac-primary: var(--primary-dark);
    --ac-primary-dark: #4338ca;
    --ac-ink: var(--ink);
    --ac-muted: var(--muted);
    --ac-line: var(--line);
    --ac-success: #217a4b;
    --ac-warning: #a65d00;
    --ac-danger: #b42318;
    color: var(--ac-ink);
}

.access-codes-panel *,
.access-codes-panel *::before,
.access-codes-panel *::after {
    box-sizing: border-box;
}

.access-codes-panel .panel {
    margin-bottom: 18px;
    padding: 20px;
    border: 1px solid var(--card-border);
    border-radius: 16px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.access-codes-panel .panel-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 16px;
}

.access-codes-panel h2 {
    margin: 0;
}

.access-codes-panel .panel-note {
    margin: 6px 0 0;
    color: var(--ac-muted);
}

.access-codes-panel .form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    max-width: 760px;
    margin-top: 16px;
}

.access-codes-panel .field {
    display: grid;
    align-content: start;
    gap: 6px;
}

.access-codes-panel .field[hidden] {
    display: none;
}

.access-codes-panel .field label {
    font-weight: 700;
}

.access-codes-panel .field small {
    color: var(--ac-muted);
}

.access-codes-panel .field-wide {
    grid-column: 1 / -1;
}

.access-codes-panel input,
.access-codes-panel select,
.access-codes-panel textarea {
    width: 100%;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid var(--field-border);
    border-radius: 10px;
    background: var(--field);
    color: var(--ac-ink);
    font: inherit;
}

.access-codes-panel .ac-button {
    min-height: 40px;
    padding: 8px 14px;
    border: 1px solid var(--ac-line);
    border-radius: 10px;
    background: var(--card);
    color: var(--ac-ink);
    font: inherit;
    cursor: pointer;
}

.access-codes-panel .ac-button-primary {
    border-color: var(--ac-primary);
    background: var(--ac-primary);
    color: white;
}

.access-codes-panel .ac-button-primary:hover {
    background: var(--ac-primary-dark);
}

.access-codes-panel .ac-button:disabled {
    opacity: 0.65;
}

.access-codes-panel .form-actions,
.access-codes-panel .code-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
}

.access-codes-panel .generated-result {
    margin-top: 18px;
    padding: 16px;
    border-left: 4px solid var(--ac-warning);
    background: var(--warning-soft);
}

.access-codes-panel .generated-result[hidden] {
    display: none;
}

.access-codes-panel .generated-result p {
    margin: 0 0 10px;
}

.access-codes-panel .generated-summary {
    color: var(--ac-warning);
    font-weight: 700;
}

.access-codes-panel .generated-code {
    flex: 1;
    min-width: 0;
    min-height: 92px;
    resize: vertical;
    font-family: Consolas, monospace;
}

.access-codes-panel .table-wrap {
    overflow-x: auto;
}

.access-codes-panel table {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
}

.access-codes-panel th,
.access-codes-panel td {
    padding: 11px 10px;
    border-bottom: 1px solid var(--ac-line);
    text-align: left;
    vertical-align: top;
}

.access-codes-panel th {
    color: var(--ac-muted);
    font-size: 0.85rem;
}

.access-codes-panel .pre-line {
    white-space: pre-line;
}

.access-codes-panel .status {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 0.82rem;
    font-weight: 700;
}

.access-codes-panel .status-active {
    background: #e4f5eb;
    color: var(--ac-success);
}

.access-codes-panel .status-used {
    background: #e8edf3;
    color: #435164;
}

.access-codes-panel .status-revoked {
    background: #fde8e7;
    color: var(--ac-danger);
}

.access-codes-panel .status-expired,
.access-codes-panel .status-exhausted {
    background: #fff0d6;
    color: var(--ac-warning);
}

.access-codes-panel .code-kind {
    display: block;
    margin-bottom: 4px;
    color: var(--ac-muted);
    font-size: 0.8rem;
}

.access-codes-panel .revoke-button {
    min-height: 32px;
    padding: 4px 12px;
    border: 1px solid var(--danger);
    border-radius: 8px;
    background: transparent;
    color: var(--ac-danger);
    font: inherit;
    cursor: pointer;
}

.access-codes-panel .empty-row {
    padding: 24px;
    color: var(--ac-muted);
    text-align: center;
}

/* ===== 註冊設定頁籤 ===== */
.access-codes-panel .domain-form {
    display: grid;
    gap: 6px;
    max-width: 560px;
    margin-top: 16px;
}

.access-codes-panel .domain-form label {
    font-weight: 700;
}

.access-codes-panel .domain-form-row {
    display: flex;
    gap: 8px;
}

.access-codes-panel .domain-form-row input {
    flex: 1 1 auto;
    min-width: 0;
}

.access-codes-panel .domain-form-row .ac-button {
    flex: 0 0 auto;
    white-space: nowrap;
}

.access-codes-panel .domain-list {
    display: grid;
    gap: 8px;
    max-width: 560px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
}

.access-codes-panel .domain-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 14px;
    border: 1px solid var(--ac-line);
    border-radius: 8px;
}

.access-codes-panel .domain-name {
    font-family: Consolas, monospace;
    font-weight: 700;
    overflow-wrap: anywhere;
}

@media (max-width: 900px) {
    .admin-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    /* 側邊欄改為從左側滑出的抽屜 */
    .admin-sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        z-index: 950;
        width: min(280px, 84vw);
        transform: translateX(-105%);
        transition: transform 0.25s ease-out;
    }

    .admin-sidebar.is-open {
        transform: translateX(0);
        box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
    }

    .sidebar-backdrop:not([hidden]) {
        position: fixed;
        inset: 0;
        z-index: 940;
        display: block;
        background: rgba(15, 23, 42, 0.5);
    }

    .sidebar-toggle {
        display: inline-grid;
        flex: 0 0 auto;
        place-items: center;
    }

    .admin-main {
        padding: 16px 16px 40px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 680px) {
    /* 用戶清單：名稱與按鈕換行，避免水平捲軸 */
    .user-item {
        flex-wrap: wrap;
    }

    .button-group,
    .user-item > .delete-btn,
    .protected-label {
        margin-left: 52px;
    }

    .card-heading,
    .search-field,
    .search-field input {
        width: 100%;
    }

    .access-codes-panel .form-grid {
        grid-template-columns: 1fr;
    }

    .access-codes-panel .field-wide {
        grid-column: auto;
    }

    .access-codes-panel .panel-heading,
    .access-codes-panel .code-actions {
        align-items: stretch;
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    .admin-sidebar,
    .admin-tab,
    .approve-btn,
    .revoke-btn,
    .delete-btn,
    .soft-btn,
    .danger-outline-btn {
        transition: none;
    }

    .admin-toast {
        animation: none;
        transition: none;
    }
}