/* ============================================
   Post It Admin Dashboard — 管理後台樣式
   ============================================ */

:root {
    --admin-bg: #0f1117;
    --admin-surface: #1a1d27;
    --admin-surface-2: #22263a;
    --admin-border: rgba(255, 255, 255, 0.06);
    --admin-text: #e4e6ef;
    --admin-text-dim: #8a8fa8;
    --admin-accent: #6c5ce7;
    --admin-accent-glow: rgba(108, 92, 231, 0.3);
    --admin-green: #00b894;
    --admin-blue: #0984e3;
    --admin-orange: #fdcb6e;
    --admin-red: #d63031;
    --admin-pink: #e84393;
    --font-ui: 'Inter', -apple-system, system-ui, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-ui);
    background: var(--admin-bg);
    color: var(--admin-text);
    min-height: 100vh;
}

.hidden { display: none !important; }

/* === Auth Screen === */
.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f1117 0%, #1a1d27 50%, #22263a 100%);
}

.auth-card {
    text-align: center;
    padding: 48px 40px;
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.auth-card i:first-child {
    font-size: 48px;
    color: var(--admin-accent);
    margin-bottom: 16px;
}

.auth-card h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-card p {
    color: var(--admin-text-dim);
    font-size: 14px;
    margin-bottom: 24px;
}

.btn-admin-login {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    background: var(--admin-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-admin-login:hover {
    background: #5b4bd5;
    box-shadow: 0 4px 20px var(--admin-accent-glow);
}

.auth-error {
    color: var(--admin-red);
    margin-top: 16px;
    font-size: 13px;
}

.back-link {
    display: inline-block;
    margin-top: 20px;
    color: var(--admin-text-dim);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--admin-text);
}

/* === Admin Header === */
.admin-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
    background: var(--admin-surface);
    border-bottom: 1px solid var(--admin-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-left i {
    color: var(--admin-accent);
    font-size: 22px;
}

.header-left h1 {
    font-size: 20px;
    font-weight: 700;
}

.header-left h1 span {
    color: var(--admin-accent);
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-header {
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    color: var(--admin-text-dim);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--font-ui);
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-header:hover {
    background: var(--admin-surface-2);
    color: var(--admin-text);
    border-color: rgba(255, 255, 255, 0.15);
}

/* === Stats Grid === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    padding: 28px 32px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 24px;
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
}

.stat-icon.users { background: rgba(108, 92, 231, 0.15); color: var(--admin-accent); }
.stat-icon.notes { background: rgba(0, 184, 148, 0.15); color: var(--admin-green); }
.stat-icon.images { background: rgba(9, 132, 227, 0.15); color: var(--admin-blue); }
.stat-icon.storage { background: rgba(253, 203, 110, 0.15); color: var(--admin-orange); }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--admin-text-dim);
    margin-top: 2px;
}

/* === Panel === */
.panel {
    margin: 0 32px 28px;
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--admin-border);
}

.panel-header h2 {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-header h2 i {
    color: var(--admin-accent);
}

.panel-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.search-input {
    padding: 8px 14px;
    background: var(--admin-surface-2);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    color: var(--admin-text);
    font-size: 13px;
    font-family: var(--font-ui);
    min-width: 200px;
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus {
    border-color: var(--admin-accent);
}

.search-input::placeholder {
    color: var(--admin-text-dim);
}

.btn-action {
    padding: 8px 16px;
    background: var(--admin-surface-2);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius-sm);
    color: var(--admin-text-dim);
    cursor: pointer;
    font-size: 13px;
    font-family: var(--font-ui);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

/* === Table === */
.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    padding: 14px 18px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--admin-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--admin-border);
    white-space: nowrap;
}

th.sortable {
    cursor: pointer;
    user-select: none;
    transition: color 0.2s;
}

th.sortable:hover {
    color: var(--admin-accent);
}

th.sortable i {
    font-size: 10px;
    margin-left: 4px;
    opacity: 0.4;
}

/* === Sort Active State START === */
th.sortable.active-sort {
    color: var(--admin-accent);
}

th.sortable.active-sort i {
    opacity: 1;
    color: var(--admin-accent);
}
/* === Sort Active State END === */

tbody td {
    padding: 14px 18px;
    font-size: 14px;
    border-bottom: 1px solid var(--admin-border);
    vertical-align: middle;
}

tbody tr {
    transition: background 0.15s;
}

tbody tr:hover {
    background: rgba(108, 92, 231, 0.05);
}

tbody tr:last-child td {
    border-bottom: none;
}

.loading-cell {
    text-align: center;
    padding: 40px !important;
    color: var(--admin-text-dim);
}

.user-avatar-small {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--admin-border);
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-notes { background: rgba(0, 184, 148, 0.15); color: var(--admin-green); }
.badge-images { background: rgba(9, 132, 227, 0.15); color: var(--admin-blue); }

.btn-view {
    padding: 6px 14px;
    background: var(--admin-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-view:hover {
    background: #5b4bd5;
}

.btn-danger {
    padding: 6px 14px;
    background: transparent;
    color: var(--admin-red);
    border: 1px solid rgba(214, 48, 49, 0.3);
    border-radius: var(--radius-sm);
    font-size: 12px;
    cursor: pointer;
    margin-left: 6px;
    transition: all 0.2s;
}

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

/* === Activity Feed === */
.activity-feed {
    padding: 20px 24px;
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--admin-surface-2) transparent;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--admin-border);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.activity-text {
    font-size: 13px;
    line-height: 1.5;
}

.activity-text strong {
    color: var(--admin-text);
}

.activity-text .activity-action {
    color: var(--admin-text-dim);
}

.activity-time {
    font-size: 11px;
    color: var(--admin-text-dim);
    margin-top: 2px;
}

.activity-preview {
    margin-top: 6px;
    padding: 8px 12px;
    background: var(--admin-surface-2);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--admin-text-dim);
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* === Modal === */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--admin-border);
}

.modal-user-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.modal-user-info img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--admin-accent);
}

.modal-user-info h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-user-info p {
    font-size: 13px;
    color: var(--admin-text-dim);
}

.btn-icon {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--admin-surface-2);
    color: var(--admin-text-dim);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s;
}

.btn-icon:hover {
    color: var(--admin-text);
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 20px 24px;
    overflow-y: auto;
}

.modal-stats {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.modal-stats span {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

/* === Modal Notes Grid === */
.modal-notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.mini-note {
    padding: 16px;
    border-radius: var(--radius-sm);
    min-height: 120px;
    position: relative;
    box-shadow: 2px 3px 8px rgba(0, 0, 0, 0.3);
    color: rgba(0, 0, 0, 0.78);
    font-size: 13px;
    line-height: 1.5;
    word-break: break-word;
    overflow: hidden;
}

.mini-note img {
    width: 100%;
    border-radius: 4px;
    max-height: 150px;
    object-fit: cover;
}

.mini-note a {
    color: #0984e3;
    text-decoration: none;
    word-break: break-all;
}

.mini-note .note-type-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.1);
    color: rgba(0, 0, 0, 0.5);
}

.mini-note .note-time {
    position: absolute;
    bottom: 8px;
    right: 8px;
    font-size: 10px;
    color: rgba(0, 0, 0, 0.4);
}

.mini-note-delete {
    position: absolute;
    top: 6px;
    left: 6px;
    width: 24px;
    height: 24px;
    border: none;
    background: rgba(214, 48, 49, 0.8);
    color: #fff;
    border-radius: 50%;
    cursor: pointer;
    font-size: 11px;
    opacity: 0;
    transition: opacity 0.2s;
}

.mini-note:hover .mini-note-delete {
    opacity: 1;
}

/* === Responsive === */
@media (max-width: 768px) {
    .admin-header { padding: 12px 16px; }
    .stats-grid { padding: 16px; gap: 12px; grid-template-columns: repeat(2, 1fr); }
    .panel { margin: 0 16px 16px; }
    .panel-header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .search-input { min-width: 100%; }
    .modal-content { width: 95%; }
    .modal-notes-grid { grid-template-columns: 1fr; }
}