/* =========================================
   CSS-ПЕРЕМЕННЫЕ ДЛЯ ТЕМ
   ========================================= */
:root {
    /* Темная тема (по умолчанию) */
    --bg-primary: #0b0e14;
    --bg-secondary: #11161e;
    --bg-tertiary: #0f131a;
    --text-primary: #e0e6ed;
    --text-secondary: #a0b0c0;
    --text-muted: #6b7c93;
    --accent: #00b4d8;
    --accent-hover: #0096c7;
    --border: rgba(0, 180, 216, 0.15);
    --border-strong: rgba(0, 180, 216, 0.3);
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --shadow: rgba(0, 180, 216, 0.1);
}

/* Светлая тема */
[data-theme="light"] {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e9ecef;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent: #0077b6;
    --accent-hover: #005f99;
    --border: rgba(0, 119, 182, 0.2);
    --border-strong: rgba(0, 119, 182, 0.4);
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --shadow: rgba(0, 0, 0, 0.1);
}

/* =========================================
   БАЗОВЫЕ СТИЛИ
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Roboto', system-ui, sans-serif;
}
body {
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: radial-gradient(circle at 20% 30%, var(--shadow) 0%, transparent 50%);
    transition: background 0.3s, color 0.3s;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* =========================================
   ШАПКА И ФУТЕР
   ========================================= */
header {
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--accent);
    padding: 18px 0;
    box-shadow: 0 4px 20px var(--shadow);
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}
.logo img {
    height: 44px;
    width: auto;
    filter: drop-shadow(0 0 6px var(--shadow));
}
.site-name {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 1px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}
.back-to-main-btn {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--border-strong);
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s;
    background: rgba(0, 180, 216, 0.05);
}
.back-to-main-btn:hover {
    background: rgba(0, 180, 216, 0.15);
    border-color: var(--accent);
}
.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.role-badge {
    background: rgba(0, 180, 216, 0.2);
    color: var(--accent);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
}
.logout-btn {
    color: var(--danger);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
}
.logout-btn:hover {
    color: #ff6b6b;
}
footer {
    background: var(--bg-tertiary);
    padding: 28px 0;
    border-top: 1px solid var(--accent);
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: auto;
}

/* =========================================
   СТРАНИЦА ВХОДА
   ========================================= */
.login-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}
.login-container {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 30px var(--shadow);
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border);
    text-align: center;
}
.login-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    display: block;
    filter: drop-shadow(0 0 10px var(--shadow));
}
.login-title {
    color: var(--accent);
    font-size: 1.6rem;
    margin-bottom: 30px;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.form-group {
    margin-bottom: 20px;
    text-align: left;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}
.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.1);
}
.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}
.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 15px var(--shadow);
}
.error-message {
    background: rgba(231, 76, 60, 0.15);
    border-left: 4px solid var(--danger);
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 4px;
    color: var(--danger);
    font-size: 0.9rem;
    text-align: left;
}

/* =========================================
   ДАШБОРД
   ========================================= */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 30px 0 20px;
    flex-wrap: wrap;
    gap: 16px;
}
.dashboard-header h1 {
    color: var(--text-primary);
    font-size: 1.8rem;
    margin: 0;
}
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}
.device-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.device-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 30px var(--shadow);
}
.device-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent);
}
.device-card.offline::before { background: var(--danger); }
.device-card.warning::before { background: var(--warning); }

.device-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}
.device-name {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px 0;
}
.device-id {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: monospace;
}
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
}
.status-online { background: rgba(39, 174, 96, 0.15); color: var(--success); }
.status-offline { background: rgba(231, 76, 60, 0.15); color: var(--danger); }
.status-warning { background: rgba(243, 156, 18, 0.15); color: var(--warning); }

.device-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}
.stat-item {
    background: var(--bg-primary);
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}
.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}
.stat-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
}

.device-actions {
    display: flex;
    gap: 10px;
}
.btn-device {
    flex: 1;
    text-align: center;
    padding: 10px;
    background: rgba(0, 180, 216, 0.1);
    color: var(--accent);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    border: 1px solid transparent;
}
.btn-device:hover {
    background: var(--accent);
    color: var(--bg-primary);
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px dashed var(--border-strong);
    margin-bottom: 40px;
}
.empty-state h3 { color: var(--accent); margin-bottom: 12px; }
.empty-state p { color: var(--text-muted); margin-bottom: 8px; }
.empty-state code {
    background: var(--bg-primary);
    padding: 4px 8px;
    border-radius: 4px;
    color: var(--accent);
    font-size: 0.9rem;
}

/* =========================================
   НАСТРОЙКИ
   ========================================= */
.settings-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 20px;
    cursor: pointer;
    font-size: 1rem;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}
.tab-btn:hover { color: var(--accent); }
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: 600;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

.settings-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
}
.settings-card h3 {
    color: var(--accent);
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}
.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}
.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.badge-role {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}
.role-admin { background: rgba(231, 76, 60, 0.15); color: var(--danger); }
.role-service { background: rgba(243, 156, 18, 0.15); color: var(--warning); }
.role-user { background: rgba(39, 174, 96, 0.15); color: var(--success); }

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    margin-right: 6px;
}
.btn-primary-sm {
    background: var(--accent);
    color: var(--bg-primary);
}
.btn-danger-sm {
    background: rgba(231, 76, 60, 0.2);
    color: var(--danger);
    border: 1px solid rgba(231, 76, 60, 0.3);
}

.form-inline {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.form-inline .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
}
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-primary);
    transition: .4s;
    border-radius: 34px;
    border: 1px solid var(--accent);
}
.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--accent);
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider { background-color: rgba(0, 180, 216, 0.2); }
input:checked + .slider:before { transform: translateX(24px); background-color: #fff; }

.warning-text {
    color: var(--warning);
    font-size: 0.9rem;
    margin-top: 4px;
}

.btn-cancel {
    flex: 1;
    padding: 12px;
    background: var(--text-muted);
    color: var(--bg-primary);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.2s;
}
.btn-cancel:hover {
    background: var(--text-secondary);
}

/* Адаптивность */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .header-actions {
        flex-direction: column;
        gap: 12px;
    }
    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

.date-input-sm {
    padding: 4px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.85rem;
    width: 130px;
}

/* =========================================
   СПЕЦИФИЧНЫЕ СТИЛИ СТРАНИЦЫ НАСТРОЕК
   ========================================= */
.settings-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 20px;
    cursor: pointer;
    font-size: 1rem;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}
.tab-btn:hover { color: var(--accent); }
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    font-weight: 600;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 16px;
}
.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}
.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
}

.badge-role {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}
.role-admin { background: rgba(231, 76, 60, 0.15); color: var(--danger); }
.role-service { background: rgba(243, 156, 18, 0.15); color: var(--warning); }
.role-user { background: rgba(39, 174, 96, 0.15); color: var(--success); }

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    margin-right: 6px;
    transition: all 0.2s;
}
.btn-primary-sm { background: var(--accent); color: var(--bg-primary); }
.btn-primary-sm:hover { background: var(--accent-hover); }
.btn-danger-sm {
    background: rgba(231, 76, 60, 0.2);
    color: var(--danger);
    border: 1px solid rgba(231, 76, 60, 0.3);
}
.btn-danger-sm:hover { background: rgba(231, 76, 60, 0.3); }

.form-inline {
    display: flex;
    gap: 12px;
    align-items: flex-end;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.form-inline .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    color: var(--text-primary);
}
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-primary);
    transition: .4s;
    border-radius: 34px;
    border: 1px solid var(--accent);
}
.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--accent);
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider { background-color: rgba(0, 180, 216, 0.2); }
input:checked + .slider:before { transform: translateX(24px); background-color: #fff; }

.warning-text {
    color: var(--warning);
    font-size: 0.9rem;
    margin-top: 4px;
}
.date-input-sm {
    padding: 4px 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.85rem;
    width: 130px;
}
.actions-cell {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
}

.device-detail-status {
    margin-top: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 12px;
    display: inline-block;
}
.device-detail-status.status-normal {
    background: rgba(39, 174, 96, 0.15);
    color: var(--success);
}
.device-detail-status.status-warning {
    background: rgba(243, 156, 18, 0.15);
    color: var(--warning);
}
.device-detail-status.status-critical {
    background: rgba(231, 76, 60, 0.15);
    color: var(--danger);
}

.device-detail-status.status-stale {
    background: rgba(149, 165, 166, 0.15);
    color: var(--text-muted);
    font-size: 0.75rem;
    font-style: italic;
}