/* Base Imports */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

:root {
    /* Light Mode Variables */
    --bg-body: #f9fafb;
    --text-main: #111827;
    --text-muted: #4b5563;
    --bg-card: #ffffff;
    --bg-header: #f3f4f6;
    --border-color: #e5e7eb;
    --hover-bg: #f9fafb;
    --sticky-bg: rgba(255, 255, 255, 0.95);
    --desc-border: #e5e7eb;
    
    /* Student Colors (Light Mode) */
    --s1-bg: #eff6ff; --s1-border: #2563eb; --s1-dot: #3b82f6;
}

body.dark {
    /* Dark Mode Variables */
    --bg-body: #111827;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --bg-card: #1f2937;
    --bg-header: #374151;
    --border-color: #374151;
    --hover-bg: #2d3748;
    --sticky-bg: rgba(31, 41, 55, 0.95);
    --desc-border: #4b5563;

    /* Student Colors (Dark Mode - slightly muted backgrounds) */
    --s1-bg: rgba(30, 58, 138, 0.3); --s1-border: #60a5fa; --s1-dot: #60a5fa;
}

body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    padding: 2rem;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

/* Header Styles */
.main-header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.main-header h1 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-main);
}

.subtitle {
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.github-star-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: #24292e;
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.2s;
}

.github-star-btn:hover {
    background-color: #111827;
}

.theme-toggle-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

/* Sticky Score Header */
.score-sticky {
    position: sticky;
    top: 1rem;
    z-index: 50;
    background-color: var(--sticky-bg);
    backdrop-filter: blur(8px);
    padding: 1rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
}

.score-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.score-success { color: #059669; }
.score-pending { color: #dc2626; }

/* Category & Module Styles */
.category {
    margin-bottom: 2rem;
    background: var(--bg-card);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.category-header {
    background-color: var(--bg-header);
    color: var(--text-main);
    padding: 1rem;
    font-weight: 700;
    font-size: 1.125rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.module-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.15s ease;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-left: 4px solid transparent;
}

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

.module-item:hover {
    background-color: var(--hover-bg);
}

/* Student Selection Styles */
.module-item.selected-1 { background-color: var(--s1-bg); border-left-color: var(--s1-border); }
.module-item.selected-2 { background-color: var(--s2-bg); border-left-color: var(--s2-border); }
.module-item.selected-3 { background-color: var(--s3-bg); border-left-color: var(--s3-border); }
.module-item.selected-4 { background-color: var(--s4-bg); border-left-color: var(--s4-border); }
.module-item.selected-5 { background-color: var(--s5-bg); border-left-color: var(--s5-border); }

.student-selector {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
    margin-top: 0.25rem;
}

.student-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.1s, border-color 0.2s;
    opacity: 0.3; /* Default dim */
}

.student-dot:hover {
    transform: scale(1.1);
    opacity: 0.7;
}

/* Dot Colors */
.dot-1 { background-color: var(--s1-dot); }
.dot-2 { background-color: var(--s2-dot); }
.dot-3 { background-color: var(--s3-dot); }
.dot-4 { background-color: var(--s4-dot); }
.dot-5 { background-color: var(--s5-dot); }

/* Active States for dots */
.module-item.selected-1 .dot-1,
.module-item.selected-2 .dot-2,
.module-item.selected-3 .dot-3,
.module-item.selected-4 .dot-4,
.module-item.selected-5 .dot-5 {
    opacity: 1;
    border-color: var(--text-main);
    transform: scale(1.1);
}

/* Badges & Text */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.badge-major { background-color: #fee2e2; color: #991b1b; }
.badge-minor { background-color: #dbeafe; color: #1e40af; }

.module-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.module-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    width: 100%;
}

.module-full-desc {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--desc-border);
    font-size: 0.9rem;
    color: var(--text-main);
    line-height: 1.5;
    white-space: pre-line;
}

.chevron {
    transition: transform 0.2s;
    color: #9ca3af;
}

/* Footer */
footer p {
    color: var(--text-muted);
}
footer a {
    color: var(--text-muted);
}
footer a:hover {
    color: var(--text-main);
}