/* Telegram Chat Analytics - Dashboard Styles */

:root {
    --primary-color: #0088cc;
    --primary-dark: #006699;
    --primary-light: #3399eb;
    --secondary-color: #2b5278;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ========== Layout ========== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--secondary-color);
}

.header-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* ========== Cards ========== */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    margin-bottom: 20px;
    transition: var(--transition);
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--secondary-color);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

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

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

.btn-secondary:hover {
    background-color: #1e3a52;
}

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

.btn-success:hover {
    background-color: #388e3c;
}

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

.btn-danger:hover {
    background-color: #d32f2f;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
}

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

/* ========== Forms ========== */
.form-group {
    margin-bottom: 15px;
}

.form-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.1);
}

select.form-control {
    background-color: white;
    cursor: pointer;
}

/* ========== Stats Grid ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    text-align: center;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========== Charts ========== */
.chart-container {
    position: relative;
    height: 300px;
    margin: 20px 0;
}

.chart-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

/* ========== Tables ========== */
.table-container {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--bg-color);
    font-weight: 600;
    color: var(--text-secondary);
}

.table tbody tr:hover {
    background-color: rgba(0, 136, 204, 0.05);
}

/* ========== Filters ========== */
.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.filter-group label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ========== Loading ========== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid white;
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ========== Alerts ========== */
.alert {
    padding: 12px 20px;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background-color: #fff3e0;
    color: #e65100;
    border-left: 4px solid var(--warning-color);
}

.alert-danger {
    background-color: #ffebee;
    color: #c62828;
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background-color: #e3f2fd;
    color: #1565c0;
    border-left: 4px solid var(--primary-color);
}

/* ========== Badges ========== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-primary {
    background-color: var(--primary-color);
    color: white;
}

.badge-success {
    background-color: var(--success-color);
    color: white;
}

.badge-warning {
    background-color: var(--warning-color);
    color: white;
}

.badge-secondary {
    background-color: var(--text-secondary);
    color: white;
}

/* ========== User Info ========== */
.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.user-name {
    font-weight: 500;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .header-controls {
        width: 100%;
        justify-content: space-between;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        width: 100%;
    }
}

/* ========== Login Page ========== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    padding: 40px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.login-header p {
    color: var(--text-secondary);
}

/* ========== Top Contributors ========== */
.contributors-list {
    list-style: none;
}

.contributor-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.contributor-name {
    font-weight: 500;
}

.contributor-count {
    background-color: var(--primary-color);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* ========== Activity Heatmap ========== */
.heatmap {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.heatmap-row {
    display: flex;
    gap: 5px;
}

.heatmap-cell {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.heatmap-cell:hover {
    transform: scale(1.1);
}

.heatmap-0 { background-color: #f5f5f5; color: var(--text-secondary); }
.heatmap-1 { background-color: #c8e6c9; color: #2e7d32; }
.heatmap-2 { background-color: #81c784; color: #1b5e20; }
.heatmap-3 { background-color: #4caf50; color: white; }
.heatmap-4 { background-color: #2e7d32; color: white; }