/* Professional Meteogram Styles */
:root {
    /* Light theme colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --blue-primary: #3b82f6;
    --blue-hover: #2563eb;
    --blue-light: #dbeafe;
    --green-primary: #10b981;
    --red-primary: #ef4444;
    --yellow-primary: #f59e0b;
    --purple-primary: #8b5cf6;
}

[data-theme="dark"] {
    /* Dark theme colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-primary: #334155;
    --border-secondary: #475569;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --blue-light: #1e3a8a;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Logo image replacing the default emoji. The height is set to mimic the
   previous `.logo-icon` sizing with some padding. The width is automatic to
   preserve aspect ratio. The border radius rounds the corners similarly to
   the old background box. */
.logo-img {
    height: 2.5rem;
    width: auto;
    border-radius: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--blue-primary), var(--purple-primary));
    border-radius: 0.75rem;
    padding: 0.5rem;
    color: white;
    text-shadow: 0 1px 2px rgb(0 0 0 / 0.3);
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

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

.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 0.5rem;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--border-secondary);
    transform: scale(1.05);
}

/* Main Content */
.main {
    padding: 2rem 0;
}

/* Controls Panel */
.controls-panel {
    background: var(--bg-primary);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
}

.search-section {
    margin-bottom: 2rem;
}

.search-section label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.search-container {
    position: relative;
}

#city-search {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.75rem;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

#city-search:focus {
    outline: none;
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 3px var(--blue-light);
}

.suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 50;
    max-height: 16rem;
    overflow-y: auto;
    margin-top: 0.25rem;
}

.suggestion-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-primary);
    transition: background-color 0.2s ease;
}

.suggestion-item:hover {
    background: var(--bg-tertiary);
}

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

.suggestion-name {
    font-weight: 600;
    color: var(--text-primary);
}

.suggestion-region {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.125rem;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .options-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

.option-group h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: background-color 0.2s ease;
}

.checkbox-item:hover {
    background: var(--bg-tertiary);
}

.checkbox-item input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--border-secondary);
    border-radius: 0.25rem;
    position: relative;
    transition: all 0.2s ease;
}

.checkbox-item input[type="checkbox"]:checked + .checkmark {
    background: var(--blue-primary);
    border-color: var(--blue-primary);
}

.checkbox-item input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.875rem;
    font-weight: bold;
}

.label-text {
    font-weight: 500;
    color: var(--text-primary);
    user-select: none;
}

/* Generate Button */
.generate-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--blue-primary), var(--purple-primary));
    color: white;
    border: none;
    border-radius: 0.75rem;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-md);
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.generate-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-icon {
    font-size: 1.25rem;
}

/* Loading State */
.loading-state {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--bg-primary);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--border-secondary);
    border-top: 3px solid var(--blue-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-state p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Charts Container */
.charts-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Chart Card */
.chart-card {
    background: var(--bg-primary);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
    overflow: hidden;
}

.chart-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-primary);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
}

.chart-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.chart-body {
    padding: 2rem;
    height: 28rem;
}

.chart-canvas {
    width: 100% !important;
    height: 100% !important;
}

.chart-footer {
    padding: 1rem 2rem;
    border-top: 1px solid var(--border-primary);
    background: var(--bg-secondary);
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.export-btn {
    padding: 0.5rem 1rem;
    background: var(--blue-primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.export-btn:hover {
    background: var(--blue-hover);
    transform: translateY(-1px);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-primary);
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-primary);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.empty-state h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.empty-state p {
    color: var(--text-secondary);
    max-width: 32rem;
    margin: 0 auto;
    line-height: 1.7;
}

/* Footer */
.footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-primary);
    background: var(--bg-primary);
}

.footer p {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 768px) {
    .controls-panel {
        padding: 1.5rem;
    }
    
    .chart-body {
        padding: 1rem;
        height: 24rem;
    }
    
    .chart-footer {
        padding: 1rem;
        flex-direction: column;
    }
    
    .export-btn {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0.75rem 0;
    }
    
    .logo-text h1 {
        font-size: 1.25rem;
    }
    
    .main {
        padding: 1rem 0;
    }
    
    .controls-panel {
        padding: 1rem;
    }
}

/* Print Styles */
@media print {
    .header, .footer, .controls-panel {
        display: none;
    }
    
    .charts-container {
        gap: 1rem;
    }
    
    .chart-card {
        break-inside: avoid;
        margin-bottom: 1rem;
    }
}