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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

/* Navigation */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--primary);
    display: inline-block;
    margin-right: 1rem;
}

.callsign-badge {
    background: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.nav-menu a:hover, .nav-menu a.active {
    background: var(--bg);
    color: var(--primary);
}

.logout-btn {
    color: var(--danger) !important;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    margin-top: 0.5rem;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text);
    text-decoration: none;
}

.dropdown-menu a:hover {
    background: var(--bg);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Flash Messages */
.flash-messages {
    margin-bottom: 1.5rem;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.5;
}

.close-btn:hover {
    opacity: 1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    border-radius: 0.375rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

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

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

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    background: var(--bg);
}

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.1rem;
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
}

/* Auth Pages */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.auth-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 450px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 0.5rem;
}

.subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 2rem;
}

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

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-light);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
}

/* Dashboard */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Filter Section */
.filter-section {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.filter-actions {
    display: flex;
    gap: 1rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    font-size: 0.95rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-section {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.form-section h3 {
    margin-bottom: 1rem;
    color: var(--primary);
    font-size: 1.1rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.qso-table thead {
    background: var(--bg);
}

.qso-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text);
    border-bottom: 2px solid var(--border);
}

.qso-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.qso-table tr:hover {
    background: var(--bg);
}

.callsign {
    font-weight: 700;
    color: var(--primary);
}

.mode-badge {
    background: var(--secondary);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.85rem;
}

.actions {
    white-space: nowrap;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-light);
}

/* Statistics Page */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.chart-container {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
}

.chart-container h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.chart-bars {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.bar-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    align-items: center;
    gap: 1rem;
}

.bar-label {
    font-weight: 600;
    text-align: right;
}

.bar-wrapper {
    background: var(--bg);
    border-radius: 0.5rem;
    height: 32px;
}

.bar {
    background: var(--primary);
    height: 100%;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 0.75rem;
    min-width: 50px;
    transition: width 0.3s;
}

.mode-bar {
    background: var(--secondary);
}

.bar-value {
    color: white;
    font-weight: 600;
    font-size: 0.9rem;
}

.stats-tables {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.stats-table-container {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
}

.stats-table {
    width: 100%;
    margin-top: 1rem;
}

.stats-table th {
    text-align: left;
    padding: 0.75rem;
    background: var(--bg);
}

.stats-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
}

/* Import/Restore Pages */
.import-page, .restore-page {
    max-width: 800px;
    margin: 0 auto;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.info-box, .warning-box, .tips-box {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.warning-box {
    border-left: 4px solid var(--danger);
    background: #fef2f2;
}

.info-box h3, .warning-box h3 {
    margin-bottom: 1rem;
}

.upload-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.file-upload {
    position: relative;
    margin-bottom: 1.5rem;
}

.file-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    border: 2px dashed var(--border);
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.file-upload-label:hover, .file-upload.drag-over .file-upload-label {
    border-color: var(--primary);
    background: var(--bg);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.upload-text {
    color: var(--text-light);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .filter-grid {
        grid-template-columns: 1fr;
    }
    
    .charts-grid, .stats-tables {
        grid-template-columns: 1fr;
    }
    
    .qso-table {
        font-size: 0.85rem;
    }
    
    .qso-table th, .qso-table td {
        padding: 0.5rem;
    }
}