/* 
 * Seoul Bike Rental Prediction Styles
 * Refactored for improved readability and maintainability
 */

/* Custom Properties for consistent theming */
:root {
    /* Color Palette */
    --color-background-primary: linear-gradient(135deg, #f3e7ff 0%, #e5f0ff 100%);
    --color-background-card: rgba(255, 255, 255, 0.9);
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #4b5563;
    --color-accent-primary: #9333ea;
    --color-accent-secondary: #3b82f6;
    
    /* Typography */
    --font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    /* Spacing */
    --spacing-small: 8px;
    --spacing-medium: 16px;
    --spacing-large: 32px;
    
    /* Shadows & Effects */
    --shadow-subtle: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 12px rgba(147, 51, 234, 0.2);
}

/* Base Reset & Global Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-primary);
    line-height: 1.6;
    background: var(--color-background-primary);
    min-height: 100vh;
    color: var(--color-text-primary);
}

/* Container Styles */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-medium);
}

.app-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-large);
}

/* Typography */
.app-header h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-large);
    color: var(--color-text-primary);
}

/* Card Component */
.card {
    background: var(--color-background-card);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: var(--spacing-large);
    box-shadow: var(--shadow-subtle);
    border: 1px solid rgba(147, 51, 234, 0.1);
}

/* Form Styles */
.form-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-large);
    margin-bottom: var(--spacing-large);
}

.form-input {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-small);
}

.form-input label {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-input input[type="range"] {
    width: 100%;
    cursor: pointer;
}

.input-range-limits {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #6b7280;
}

.form-input select {
    padding: var(--spacing-medium);
    border-radius: 6px;
    border: 1px solid #d1d5db;
    background-color: white;
    font-size: 1rem;
    width: 100%;
}

/* Button Styles */
.form-actions {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-large);
}

.prediction-section button {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: white;
    padding: var(--spacing-medium) var(--spacing-large);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
    transition: transform 0.2s, box-shadow 0.2s;
}

.prediction-section button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}

.prediction-section button:active {
    transform: translateY(0);
}

/* Loading Spinner */
.button-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

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

/* Results Section */
.results-section {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-subtle);
    padding: var(--spacing-large);
    margin: var(--spacing-large) auto;
}

.results-title {
    font-size: 2rem;
    text-align: center;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-large);
    font-weight: 600;
}

.results-summary {
    text-align: center;
    margin: var(--spacing-large) 0;
}

.results-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: #6366f1;
    margin-bottom: var(--spacing-small);
}

.results-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.results-timestamp {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-large);
    text-align: center;
}

/* Conditions Grid */
.results-conditions h3 {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-medium);
}

.conditions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-large);
    margin-bottom: var(--spacing-large);
}

.condition-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
}

.condition-icon {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    font-size: 1.25rem;
}

.condition-details {
    display: flex;
    flex-direction: column;
}

.condition-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.condition-value {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.season-summary {
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
    padding-top: var(--spacing-medium);
    border-top: 1px solid #e5e7eb;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* Informational Banners */
.info-banner {
    background: #f0f9ff;
    padding: var(--spacing-small);
    border-radius: 8px;
    margin-top: var(--spacing-medium);
    display: flex;
    align-items: center;
    gap: var(--spacing-small);
}

.info-banner a {
    color: var(--color-accent-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.info-banner a:hover {
    text-decoration: underline;
}

.external-link-icon {
    font-size: 0.875rem;
}

/* Error Notification */
.error-notification {
    background: #fee2e2;
    color: #991b1b;
    padding: var(--spacing-medium);
    border-radius: 8px;
    margin: var(--spacing-medium) auto;
    max-width: 1000px;
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .form-grid,
    .conditions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-small);
    }

    .app-header h1 {
        font-size: 2rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .conditions-grid {
        grid-template-columns: 1fr;
    }

    .results-number {
        font-size: 2.5rem;
    }

    .condition-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
}