:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a2e;
    --bg-hover: #252540;
    --border: #2a2a45;
    --text-primary: #e8e8f0;
    --text-muted: #8888aa;
    --accent: #7c3aed;
    --accent-light: #a78bfa;
    --accent-glow: rgba(124, 58, 237, 0.4);
    --cyan: #06b6d4;
    --success: #10b981;
    --danger: #ef4444;
    --radius: 12px;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* Login */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(ellipse at 50% 0%, rgba(124,58,237,0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 80%, rgba(6,182,212,0.1) 0%, transparent 50%),
                var(--bg-primary);
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.login-logo {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-light), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-card h2 {
    text-align: center;
    margin-bottom: 24px;
    font-weight: 500;
    color: var(--text-muted);
}

.card-glow {
    box-shadow: 0 0 30px rgba(124, 58, 237, 0.08), 0 4px 20px rgba(0,0,0,0.3);
}

/* Forms */
.form-stack { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea {
    padding: 10px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn {
    padding: 10px 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-hover);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}
.btn:hover { background: var(--border); }
.btn-primary {
    background: linear-gradient(135deg, var(--accent), #5b21b6);
    border-color: transparent;
    color: #fff;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-block { width: 100%; display: block; text-align: center; text-decoration: none; }
.btn-sm { padding: 4px 12px; font-size: 12px; }
.btn-danger { background: var(--danger); border-color: transparent; color: #fff; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-error { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3); color: #fca5a5; }
.alert-success { background: rgba(16,185,129,0.15); border: 1px solid rgba(16,185,129,0.3); color: #6ee7b7; }

.text-muted { color: var(--text-muted); font-size: 13px; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

/* Admin Layout */
.admin-body { overflow: hidden; }
.admin-layout { display: flex; height: 100vh; }

.sidebar {
    width: 220px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-brand {
    padding: 20px;
    font-size: 18px;
    font-weight: 700;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(135deg, var(--accent-light), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-nav { flex: 1; padding: 12px 0; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 14px;
}
.nav-item:hover, .nav-item.active {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-left: 3px solid var(--accent);
}
.nav-icon { font-size: 16px; }

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}
.user-info { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px 32px 56px;
    background: var(--bg-primary);
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.page-header { margin-bottom: 16px; flex-shrink: 0; }
.page-header h1 { font-size: 22px; font-weight: 600; }

/* Cards & Table */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.card h3 { margin-bottom: 12px; font-size: 16px; }

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
.download-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s;
}
.download-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(124, 58, 237, 0.16), 0 4px 20px rgba(0,0,0,0.3);
    color: inherit;
}
.download-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid rgba(167, 139, 250, 0.25);
    flex-shrink: 0;
}
.download-card-body { flex: 1; min-width: 0; }
.download-card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}
.download-card-desc {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.download-card-action {
    flex-shrink: 0;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), #5b21b6);
}
.download-card-code {
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-muted);
}
.download-card-code strong {
    color: var(--accent-light);
    font-size: 14px;
    letter-spacing: 1px;
    margin-left: 4px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
}
.stat-icon { font-size: 28px; margin-bottom: 8px; }
.stat-value { font-size: 32px; font-weight: 700; color: var(--accent-light); }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th {
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-weight: 500;
}
.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(42,42,69,0.5);
}
.data-table tr:hover td { background: var(--bg-hover); }

.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
}
.badge-admin { background: rgba(124,58,237,0.2); color: var(--accent-light); }
.badge-super_admin { background: rgba(6,182,212,0.2); color: var(--cyan); }
.badge-user { background: rgba(16,185,129,0.2); color: var(--success); }

.toolbar { margin-bottom: 16px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.search-bar { margin-bottom: 16px; padding: 16px 18px; }
.search-form {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    align-items: flex-end;
}
.search-field { margin: 0; min-width: 140px; }
.search-field-wide { flex: 1; min-width: 220px; }
.search-field label { display: block; margin-bottom: 6px; font-size: 12px; color: var(--text-muted); }
.search-field input,
.search-field select {
    width: 100%;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}
.search-actions { display: flex; gap: 8px; padding-bottom: 1px; }

.info-list { list-style: none; padding: 0; }
.info-list li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
}
.info-list li:last-child { border-bottom: none; }

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.modal.hidden { display: none; }
.modal-content {
    width: 100%;
    max-width: 480px;
    padding: 28px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.modal-content h3 { margin-bottom: 20px; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 8px; }

@media (max-width: 900px) {
    .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
    .download-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .admin-body {
        overflow: auto;
        -webkit-overflow-scrolling: touch;
    }
    .admin-layout {
        flex-direction: column;
        min-height: 100vh;
        min-height: 100dvh;
        height: auto;
        padding-bottom: calc(64px + 32px + env(safe-area-inset-bottom, 0px));
    }
    .sidebar {
        position: fixed;
        left: 0;
        right: 0;
        bottom: calc(28px + env(safe-area-inset-bottom, 0px));
        z-index: 1001;
        width: 100%;
        height: auto;
        flex-direction: row;
        align-items: stretch;
        border-right: none;
        border-top: 1px solid var(--border);
        background: rgba(18, 18, 26, 0.98);
        backdrop-filter: blur(8px);
        padding: 0;
    }
    .sidebar-brand,
    .sidebar-footer .user-info {
        display: none;
    }
    .sidebar-nav {
        display: flex;
        flex: 1;
        padding: 0;
    }
    .sidebar-footer {
        display: flex;
        flex: 0 0 auto;
        padding: 0;
        border-top: none;
        border-left: 1px solid var(--border);
    }
    .nav-item {
        flex: 1;
        flex-direction: column;
        justify-content: center;
        gap: 2px;
        padding: 8px 6px 10px;
        text-align: center;
        font-size: 11px;
        border-left: none !important;
        min-height: 56px;
    }
    .nav-item.active,
    .nav-item:hover {
        background: rgba(124, 58, 237, 0.12);
        border-left: none !important;
        color: var(--accent-light);
    }
    .nav-icon { font-size: 18px; line-height: 1; }
    .main-content {
        padding: 14px 14px 20px;
        overflow: visible;
    }
    .page-header { margin-bottom: 12px; }
    .page-header h1 { font-size: 20px; }
    .dashboard-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .stat-card { padding: 16px 12px; }
    .stat-icon { font-size: 22px; }
    .stat-value { font-size: 22px; }
    .download-grid { gap: 10px; margin-bottom: 14px; }
    .download-card {
        padding: 14px;
        gap: 12px;
        min-height: 72px;
    }
    .download-card-icon {
        width: 42px;
        height: 42px;
        font-size: 20px;
        border-radius: 10px;
    }
    .download-card-title { font-size: 15px; }
    .download-card-desc {
        white-space: normal;
        line-height: 1.4;
    }
    .download-card-action {
        padding: 8px 12px;
        font-size: 12px;
    }
    .card { padding: 14px; }
    .info-list li { font-size: 13px; }
    .login-page {
        padding: 20px 16px 48px;
        align-items: flex-start;
        min-height: 100dvh;
    }
    .login-card {
        padding: 28px 20px;
        margin-top: 10vh;
        max-width: 100%;
    }
    .modal {
        align-items: flex-end;
        padding: 0;
    }
    .modal-content {
        max-width: 100%;
        border-radius: 16px 16px 0 0;
        padding: 20px 16px calc(20px + env(safe-area-inset-bottom, 0px));
        max-height: 90vh;
        overflow-y: auto;
    }
    .contact-bar {
        padding: 6px 12px calc(6px + env(safe-area-inset-bottom, 0px));
        font-size: 11px;
    }

    /* Users page: scroll naturally on phone */
    .page-users .main-content {
        overflow: visible;
        display: block;
    }
    .page-users .users-page {
        display: block;
        min-height: 0;
    }
    .page-users .users-panel {
        display: block;
        overflow: visible;
    }
    .page-users .users-table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        max-height: none;
    }
    .users-filter {
        padding: 12px;
        gap: 10px;
    }
    .users-filter-fields {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }
    .users-filter .search-field,
    .users-filter .search-field-wide {
        min-width: 0;
        max-width: none;
        width: 100%;
    }
    .users-filter .search-field-wide {
        grid-column: 1 / -1;
    }
    .users-filter-actions {
        width: 100%;
    }
    .users-filter-actions .btn {
        flex: 1;
        text-align: center;
    }
    .users-meta-row {
        padding: 10px 12px;
        gap: 8px;
    }
    .users-meta-row .users-pager:first-of-type {
        width: 100%;
        justify-content: flex-start;
    }
    .users-footer {
        padding: 10px 12px;
    }
    .users-table th,
    .users-table td {
        padding: 8px 10px;
        font-size: 12px;
    }
    .users-table .col-user { min-width: 140px; }
    .row-actions .btn {
        padding: 6px 10px;
        min-height: 32px;
    }
    .btn, .form-group input, .form-group select {
        font-size: 16px; /* avoid iOS zoom */
    }
    .btn-sm { font-size: 13px; }
    .users-filter .search-field input,
    .users-filter .search-field select {
        font-size: 16px;
        min-height: 40px;
    }
}

@media (max-width: 480px) {
    .dashboard-grid { grid-template-columns: 1fr; }
    .download-card {
        flex-wrap: wrap;
    }
    .download-card-action {
        width: 100%;
        text-align: center;
        margin-top: 4px;
    }
}

.contact-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    text-align: center;
    padding: 7px 12px;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.3px;
    border-top: 1px solid var(--border);
    background: rgba(10, 10, 15, 0.94);
}

.apk-download-btn {
    position: fixed;
    right: 18px;
    bottom: 38px;
    z-index: 1000;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    background: linear-gradient(135deg, var(--accent), #5b21b6);
    border: 1px solid rgba(167, 139, 250, 0.35);
    box-shadow: 0 4px 18px rgba(124, 58, 237, 0.35);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.apk-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(124, 58, 237, 0.45);
    color: #fff;
}

/* Users page — one viewport */
.page-users .main-content {
    overflow: hidden;
}
.page-users .page-header {
    margin-bottom: 12px;
}
.users-page {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}
.users-panel {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}
.users-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    align-items: flex-end;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    background: rgba(18, 18, 26, 0.55);
    flex-shrink: 0;
}
.users-filter-fields {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    align-items: flex-end;
    flex: 1;
    min-width: 0;
}
.users-filter-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    padding-bottom: 1px;
}
.users-filter .search-field {
    margin: 0;
    min-width: 120px;
}
.users-filter .search-field-wide {
    flex: 1;
    min-width: 180px;
    max-width: 280px;
}
.users-filter .search-field label {
    display: block;
    margin-bottom: 4px;
    font-size: 12px;
    color: var(--text-muted);
}
.users-filter .search-field input,
.users-filter .search-field select {
    width: 100%;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}
.users-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.users-toolbar-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.users-stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-muted);
}
.users-stat-pill strong { color: var(--accent-light); font-weight: 600; }
.users-table-wrap {
    flex: 1;
    min-height: 0;
    overflow: auto;
}
.users-table { margin: 0; }
.users-table thead th {
    background: #12121a;
    position: sticky;
    top: 0;
    z-index: 1;
    padding: 10px 14px;
    font-size: 12px;
}
.users-table td {
    padding: 10px 14px;
    font-size: 13px;
}
.users-table .col-user { min-width: 200px; }
.users-table .col-actions { width: 140px; white-space: nowrap; }
.users-table .col-time { white-space: nowrap; color: var(--text-muted); font-size: 12px; }
.users-empty {
    text-align: center;
    padding: 40px 16px !important;
    color: var(--text-muted);
}
.user-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 9px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--cyan));
}
.user-avatar.role-admin {
    background: linear-gradient(135deg, #7c3aed, #5b21b6);
}
.user-avatar.role-super_admin {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}
.user-avatar.role-user {
    background: linear-gradient(135deg, #10b981, #059669);
}
.user-name { font-weight: 600; line-height: 1.3; }
.user-sub { font-size: 11px; margin-top: 1px; }
.status-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 2px 9px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
}
.status-chip::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}
.status-on {
    color: #6ee7b7;
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.25);
}
.status-off {
    color: #fca5a5;
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.25);
}
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.users-footer {
    flex-shrink: 0;
    padding: 10px 16px;
    border-top: 1px solid var(--border);
    background: rgba(18, 18, 26, 0.7);
}
.users-pager {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.users-pager-info {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}
.pagination {
    display: flex;
    align-items: center;
    gap: 5px;
    flex-wrap: wrap;
}
.pagination a.btn,
.pagination .btn {
    min-width: 32px;
    text-align: center;
    text-decoration: none;
    padding: 4px 10px;
}
.pagination-current { pointer-events: none; }
.pagination-disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}
.pagination-ellipsis {
    color: var(--text-muted);
    padding: 0 2px;
    font-size: 12px;
}