/* CSS Variables based on Brand Rules */
:root {
    --primary-green: #2F855A;
    --dark-periwinkle: #2F2B9E;
    --light-grey: #F4F4F4;
    --text-charcoal: #2D3748;
    --ku-crimson: #DC143C; /* Accessibility Focus outline */
    --bg-white: #FFFFFF;
}

/* Reset & Base Settings */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

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

/* Accessibility: Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--dark-periwinkle);
    color: white;
    padding: 8px;
    z-index: 1000;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--ku-crimson);
}

/* Typography & Links */
h1, h2, h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-green);
}

a {
    color: var(--dark-periwinkle);
    text-decoration: underline;
}

a:hover {
    color: var(--primary-green);
}

/* Global Focus State */
*:focus-visible {
    outline: 3px solid var(--ku-crimson) !important;
    outline-offset: 2px;
}

/* Layout Padding (5% logic) */
.site-header, 
.tab-nav, 
.main-content, 
.site-footer {
    padding: 2rem 5%;
}

/* Header Background and Text */
.site-header {
    background-color: var(--primary-green);
    color: var(--bg-white);
    padding: 2rem 5%;
}

/* Override global heading color for the header */
.site-header h1 {
    font-size: 2.2rem;
    color: var(--bg-white); 
}

/* Override global link color so the email stands out */
.site-header a {
    color: var(--bg-white);
    text-decoration: underline;
}

.site-header a:hover {
    color: var(--light-grey);
}

/* Tab Navigation Container */
.tab-nav {
    background-color: var(--primary-green); /* Merges seamlessly with the header above it */
    padding-top: 0;
    padding-bottom: 0; /* Tabs touch the bottom */
}

.tab-list {
    display: flex;
    gap: 0.5rem;
    /* Mobile scrolling setup */
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
}

.tab-list::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}

/* Tab Buttons (Folder Style) */
button[role="tab"] {
    appearance: none;
    background-color: var(--primary-green); /* Solid green background for inactive tabs */
    color: var(--bg-white); /* White text for contrast */
    border: 1px solid var(--primary-green); /* Border matches the green background */
    border-bottom: none;
    border-radius: 8px 8px 0 0;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s, color 0.2s, border-top 0.2s;
}

button[role="tab"]:hover {
    background-color: var(--bg-white); /* Changes to white on hover */
    color: var(--primary-green); /* Text changes to green on hover */
}

/* Active Tab Styles */
button[role="tab"][aria-selected="true"] {
    background-color: var(--bg-white);
    color: var(--text-charcoal); /* Dark charcoal text for readability on the active tab */
    border-top: 4px solid var(--dark-periwinkle);
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
    position: relative;
    z-index: 2;
    margin-bottom: -1px; /* Overlaps the bottom border to "merge" with panel */
}

/* Main Content Panels */
.main-content {
    border-top: 1px solid #ddd; /* Matches the bottom of the non-active tabs */
    min-height: 50vh;
}

.tab-panel {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.highlight-block {
    background-color: var(--light-grey);
    padding: 1.5rem;
    border-radius: 8px;
}

/* Jinja-ready Lists */
.data-list {
    list-style-type: disc;
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.data-list li {
    margin-bottom: 0.75rem;
}

.page-links {
    margin-bottom: 1.5rem;
    font-weight: bold;
}

/* Footer */
.site-footer {
    background-color: var(--light-grey);
    text-align: center;
    font-size: 0.875rem;
}

/* Media Queries for Desktop Wrap behavior */
@media (min-width: 601px) {
    .tab-list {
        flex-wrap: wrap; /* Desktop allows wrapping instead of scrolling */
        overflow-x: visible;
    }
}