/* ----------------------------------------------------------------------------------
 * Project: SEES Public
 * File: flask_server/static/css/style.css
 * ----------------------------------------------------------------------------------
 * Purpose:
 * Main stylesheet for the SEES Public Flask application.
 * ----------------------------------------------------------------------------------
 * Author: Christofanis Skordas
 *
 * Copyright (C) 2025 GSECARS, The University of Chicago, USA
 * Copyright (C) 2025 NSF SEES, USA
 * ---------------------------------------------------------------------------------- */

:root {
    /* Base font size */
    --font-size-base: 12px;
    --font-size-sm: 0.75rem;
    --font-size-xs: 0.7rem;
    --font-size-lg: 1rem;
    --font-size-xl: 1.25rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --checkbox-label-spacing: 1.4rem;

    /* Transitions */
    --transition-speed: 0.2s;

    /* Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --accent-primary: #0d6efd;
    --accent-secondary: #8b5cf6;
    --border-color: #dee2e6;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --hover-bg: rgba(13, 110, 253, 0.1);
    --focus-ring: rgba(13, 110, 253, 0.25);
    --focus-bg: #e9ecef;
}

/* Base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-size: var(--font-size-base);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* Page wrapper for sticky footer */
.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Main content area should grow to fill space */
.content {
    flex: 1;
}

.sees-public-header {
    width: 100vw;
    margin: 0;
    margin-left: calc(-50vw + 50%);
    background-color: var(--bg-tertiary) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--spacing-xl);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    gap: var(--spacing-xl);
}

.sees-public-header h4 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

/* Header logo styling */
.header-logo {
    display: flex;
    align-items: center;
    margin-right: var(--spacing-md);
}

.header-sees-logo {
    max-width: 360px;
    height: auto;
    filter: brightness(0.9);
}

/* Navigation styles */
.navbar {
    background: none !important;
    border: none;
    padding: 0;
    box-shadow: none;
    flex: 1;
    display: flex;
    justify-content: center;
}

.navbar-container {
    display: flex;
    justify-content: center;
    width: 100%;
}

.navbar-nav {
    display: flex;
    gap: var(--spacing-md);
}

.navbar-nav .nav-item {
    position: relative;
}

.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md) !important;
    transition: all var(--transition-speed) ease;
    border-bottom: 3px solid transparent;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-lg);
    white-space: nowrap;
}

.navbar-nav .nav-link:hover {
    color: var(--accent-primary) !important;
    background-color: var(--hover-bg);
    border-bottom-color: var(--accent-primary);
    border-radius: 4px 4px 0 0;
}

/* Active page styling - always underlined */
.navbar-nav .nav-link.active {
    color: var(--accent-primary) !important;
    background-color: var(--focus-bg);
    border-bottom: 3px solid var(--accent-primary);
    font-weight: 600;
    border-radius: 4px 4px 0 0;
}

.navbar-nav .nav-link i {
    font-size: var(--font-size-lg);
}

/* Navbar toggle styling */
.navbar-toggler {
    border: 1px solid var(--border-color);
    padding: var(--spacing-xs);
    background-color: var(--bg-primary);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.25rem var(--focus-ring);
}

/* Datasets */
.dataset-header {
    width: 100%;
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--spacing-xl);
}

.dataset-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.dataset-title {
    color: var(--text-primary);
    font-size: 32px;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

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

.dataset-table td {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
    font-size: 16px;
}

.dataset-table td:first-child {
    font-weight: 500;
    color: var(--text-secondary);
    width: 200px;
    min-width: 200px;
    font-size: 16px;
}

.dataset-table td:last-child {
    color: var(--text-primary);
}

.dataset-table a {
    color: var(--accent-primary);
    text-decoration: none;
}

.dataset-table a:hover {
    text-decoration: underline;
}

.license-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    text-decoration: none;
}

.license-badge:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent-primary);
    color: var(--text-primary);
    text-decoration: none;
}

/* Responsive sizing */
@media (max-width: 992px) {
    .header-sees-logo {
        max-width: 280px;
    }

    .header-content {
        padding: var(--spacing-md) var(--spacing-lg);
        gap: var(--spacing-md);
    }
    
    .navbar-nav {
        gap: var(--spacing-sm);
    }
    
    .navbar-nav .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm) !important;
        font-size: var(--font-size-base);
    }
}

@media (max-width: 768px) {
    .header-sees-logo {
        max-width: 200px;
    }
    
    .header-content {
        padding: var(--spacing-md);
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .navbar {
        order: 2;
        width: 100%;
    }
    
    .sees-public-header h4 {
        order: 3;
    }
    
    .navbar-collapse {
        background-color: rgba(255, 255, 255, 0.95);
        border: 1px solid var(--border-color);
        border-radius: 4px;
        margin-top: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .navbar-nav {
        flex-direction: column;
        gap: 0;
    }
    
    .navbar-nav .nav-link {
        padding: var(--spacing-sm) var(--spacing-md) !important;
        border-bottom: none;
        border-left: 3px solid transparent;
        justify-content: center;
    }
    
    .navbar-nav .nav-link:hover {
        border-bottom: none;
        border-left-color: var(--accent-primary);
        border-radius: 0 4px 4px 0;
    }
    
    .navbar-nav .nav-link.active {
        border-bottom: none;
        border-left: 3px solid var(--accent-primary);
        border-radius: 0 4px 4px 0;
    }

}