/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0a0a0f;
    --bg-card: #1a1a2e;
    --bg-card-alt: #0f0f1a;
    --bg-input: #0f0f1a;
    --border: #2a2a4e;
    --accent: #06b6d4;
    --accent-hover: #0891b2;
    --accent-glow: rgba(6, 182, 212, 0.15);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #f59e0b;
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
}

body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.5;
    min-height: 100vh;
}

/* ===== Header ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    height: 60px;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.logo img {
    height: 32px;
    width: auto;
}

nav {
    display: flex;
    gap: 0.25rem;
}

.tab {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.tab.active {
    color: var(--accent);
    background: rgba(6, 182, 212, 0.1);
}

.logout-btn {
    padding: 0.4rem 1rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.logout-btn:hover {
    color: var(--danger);
    border-color: var(--danger);
}

/* ===== Main Content ===== */
main {
    padding-top: 80px;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    padding-bottom: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.section-header .section-title {
    margin-bottom: 0;
}

/* ===== Cards Grid ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: border-color 0.2s;
}

.card:hover {
    border-color: rgba(6, 182, 212, 0.3);
}

.card-wide {
    grid-column: 1 / -1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.card-icon {
    font-size: 1.2rem;
}

.card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-online {
    color: var(--success);
}

/* ===== Progress Bars ===== */
.progress-group {
    margin-bottom: 0.5rem;
}

.progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.5s ease;
    width: 0%;
}

.progress-fill.warning {
    background: var(--warning);
}

.progress-fill.danger {
    background: var(--danger);
}

/* ===== Status Badges ===== */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
}

.status-badge.online {
    color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.status-badge.offline {
    color: var(--text-muted);
    background: rgba(100, 116, 139, 0.1);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 6px var(--success);
}

.status-dot.offline {
    background: var(--text-muted);
}

/* ===== Tables ===== */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

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

thead th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(42, 42, 78, 0.5);
    white-space: nowrap;
}

tbody tr:nth-child(even) {
    background: var(--bg-card);
}

tbody tr:nth-child(odd) {
    background: var(--bg-card-alt);
}

tbody tr:hover {
    background: rgba(6, 182, 212, 0.05);
}

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

.text-right {
    text-align: right;
}

.text-mono {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.8rem;
}

.empty-state {
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
}

/* ===== Buttons ===== */
.btn-primary {
    padding: 0.6rem 1.25rem;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-primary:active {
    transform: scale(0.97);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-danger {
    padding: 0.4rem 0.75rem;
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.btn-ghost {
    padding: 0.4rem 0.75rem;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-ghost:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.btn-icon {
    padding: 0.35rem 0.5rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-icon:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.actions-cell {
    display: flex;
    gap: 0.35rem;
    align-items: center;
}

/* ===== Forms ===== */
.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 600px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.7rem 0.85rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.35rem;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

.save-status {
    font-size: 0.85rem;
    color: var(--success);
}

/* ===== Modals ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: 1rem;
}

.modal-overlay.hidden {
    display: none;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal .form-group {
    margin-bottom: 1.25rem;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* Config display in modal */
.config-block {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.qr-container {
    text-align: center;
    margin: 1rem 0;
}

.qr-container img {
    max-width: 220px;
    border-radius: var(--radius);
    background: white;
    padding: 0.5rem;
}

/* ===== Log type badges ===== */
.log-type {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.log-type.client_add {
    color: var(--success);
    background: rgba(34, 197, 94, 0.1);
}

.log-type.client_remove {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.log-type.settings {
    color: var(--warning);
    background: rgba(245, 158, 11, 0.1);
}

.log-type.default {
    color: var(--text-secondary);
    background: rgba(148, 163, 184, 0.1);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    header {
        flex-wrap: wrap;
        height: auto;
        padding: 0.75rem 1rem;
        gap: 0.5rem;
    }

    .logo {
        order: 1;
    }

    .logout-btn {
        order: 2;
    }

    nav {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.15rem;
    }

    .tab {
        padding: 0.4rem 0.7rem;
        font-size: 0.8rem;
    }

    main {
        padding-top: 120px;
        padding-left: 1rem;
        padding-right: 1rem;
    }

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

    .settings-card {
        max-width: 100%;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .actions-cell {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 1.25rem;
    }

    .modal {
        padding: 1.5rem;
    }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}