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

:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f1f5f9;
    --bg-sidebar: #f8fafc;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-inverse: #ffffff;
    --border-color: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --sidebar-width: 250px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.3s, color 0.3s;
}

.app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: background 0.3s, border-color 0.3s;
}

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

.logo h2 { font-size: 20px; color: var(--accent-color); }

.theme-selector select {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
}

.nav-menu {
    flex: 1;
    padding: 12px 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 8px;
    margin-bottom: 4px;
    transition: all 0.2s;
    font-size: 15px;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: color-mix(in srgb, var(--accent-color) 15%, transparent); color: var(--accent-color); font-weight: 600; }
.nav-item .icon { font-size: 20px; }

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.btn-login {
    width: 100%;
    padding: 10px;
    background: #fc3f1d;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}

.btn-login:hover { background: #e03015; }

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 24px;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.top-header h1 { font-size: 28px; }

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-logout {
    padding: 8px 16px;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-secondary);
}

/* Pages */
.page { display: none; }
.page.active { display: block; }

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

.stat-card {
    background: var(--bg-card);
    padding: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 16px;
    align-items: center;
    transition: background 0.3s, box-shadow 0.3s;
}

.stat-icon { font-size: 32px; }

.stat-content h3 {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 500;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-detail {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

/* Section */
.section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.section-header h2 { font-size: 20px; }

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--text-inverse);
}

.btn-primary:hover { background: var(--accent-hover); }
.btn-full { width: 100%; }

/* Events */
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

.events-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.event-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    transition: box-shadow 0.2s;
}

.event-card:hover { box-shadow: var(--shadow); }

.event-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.event-card-header h3 { font-size: 16px; }

.status-badge {
    padding: 4px 10px;
    border-radius: 20px;
    color: white;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.event-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

/* Filters */
.filters {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.input, .select, .textarea {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
    background: var(--bg-card);
    color: var(--text-primary);
}

.input:focus, .select:focus, .textarea:focus { border-color: var(--accent-color); }
.input { flex: 1; min-width: 200px; }
.select { min-width: 180px; }

/* Tasks */
.tasks-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.priority-urgent { color: var(--danger); }
.priority-high { color: var(--warning); }

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal-content {
    background: var(--bg-card);
    margin: 40px auto;
    padding: 32px;
    border-radius: 16px;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 16px;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.textarea { width: 100%; resize: vertical; }

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
    font-size: 15px;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content { margin-left: 0; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
}

/* ============ Detail Modal ============ */

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.detail-divider {
    height: 1px;
    background: var(--border-color);
    margin: 20px 0;
}

.detail-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.detail-tab {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.detail-tab.active {
    background: var(--accent-color);
    color: var(--text-inverse);
    border-color: var(--accent-color);
}

.detail-tab-content {
    display: none;
}

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

.detail-section {
    margin-bottom: 8px;
}

.detail-section h3 {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 600;
}

.detail-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
}

@media (max-width: 600px) {
    .detail-row { grid-template-columns: 1fr; }
}

.detail-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.detail-field label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

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

.btn-danger:hover {
    opacity: 0.9;
}

.detail-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    margin-bottom: 10px;
}

.detail-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.detail-card-body {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 14px;
    color: var(--text-secondary);
}

.detail-badge {
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    background: var(--bg-hover);
    color: var(--text-secondary);
}

.detail-badge.accent {
    background: var(--accent-color);
    color: var(--text-inverse);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 600px) {
    .detail-grid { grid-template-columns: 1fr; }
}

.select {
    appearance: none;
    -webkit-appearance: none;
    -moz-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 d='M6 8L1 3h10z' fill='%2364748b'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}
.detail-header { padding-right: 40px; }

/* Бургер-меню */
.burger-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    margin-right: 12px;
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .burger-btn {
        display: block;
    }
    .sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        bottom: 0;
        z-index: 200;
        transition: left 0.3s;
        width: 280px;
        box-shadow: var(--shadow);
    }
    body.sidebar-open .sidebar {
        left: 0;
    }
    body.sidebar-open::after {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 199;
    }
    .main-content {
        margin-left: 0 !important;
    }
    .top-header {
        flex-wrap: wrap;
    }
    .modal-content {
        margin: 20px auto;
        max-width: 95vw;
        padding: 20px;
    }
    .detail-row {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    .header-right {
        flex-wrap: wrap;
        gap: 8px;
    }
}

@media (max-width: 768px) {
    body.sidebar-open .sidebar {
        left: 0 !important;
    }
}