:root {
    --primary: #2563eb;
    --primary-light: #eff6ff;
    --secondary: #db2777;
    --secondary-light: #fdf2f8;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #059669;
    --success-bg: #ecfdf5;
    --warning: #d97706;
    --warning-bg: #fffbeb;
    --error: #dc2626;
    --error-bg: #fef2f2;
    --planned: #2563eb;
    --planned-bg: #eff6ff;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text);
    background-color: var(--bg-alt);
    margin: 0;
    line-height: 1.5;
}

h1,
h2,
h3,
h4 {
    font-family: 'Outfit', sans-serif;
    margin: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.main-header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
}

.main-header h1 {
    font-size: 2.5rem;
    color: #1e293b;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Top Section Layout */
.top-content {
    display: grid;
    grid-template-columns: 620px 1fr;
    gap: 40px;
    padding: 40px 0;
    align-items: start;
}

.plans-column {
    display: flex;
    flex-direction: column;
}

.section-title {
    margin-bottom: 24px;
}

.section-title h2 {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.plans-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-height: 800px;
    overflow-y: auto;
    padding: 8px 8px 8px 0;
    /* Extra top padding for hover lift */
    margin-top: -8px;
    /* Offset padding to keep alignment */
}

/* Custom Scrollbar for Plans Grid */
.plans-grid::-webkit-scrollbar {
    width: 6px;
}

.plans-grid::-webkit-scrollbar-track {
    background: var(--bg-alt);
}

.plans-grid::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 10px;
}

.plan-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    flex-shrink: 0;
}

.plan-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.plan-card.active {
    border-color: var(--primary);
    border-width: 2px;
    padding: 19px;
    background: var(--primary-light);
}

.card-rank {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-muted);
    background: var(--bg-alt);
    padding: 2px 6px;
    border-radius: 4px;
}

.card-title {
    display: flex;
    flex-direction: column;
    margin-bottom: 16px;
}

.conc-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.2;
}

.plus {
    color: var(--text-muted);
    font-weight: 300;
    margin: 1px 0;
    font-size: 0.8rem;
}

.card-metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-top: 1px solid var(--border);
    padding-top: 12px;
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric .val {
    font-weight: 700;
    font-size: 1.1rem;
}

.metric .lab {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* Schedule Column */
.schedule-column {
    display: flex;
    flex-direction: column;
}

.column-header {
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 12px;
}

.column-header h3 {
    font-size: 1.5rem;
    color: #1e293b;
}

#schedule-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Course Items */
.course-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    border-left-width: 4px;
}

.course-item.core {
    border-left-color: var(--success);
}

.course-item.flexible {
    border-left-color: var(--warning);
}

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.course-code {
    font-weight: 700;
    text-decoration: none;
    color: var(--primary);
}

.course-code:hover {
    text-decoration: underline;
}

.course-req {
    font-size: 0.75rem;
    background: var(--bg-alt);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--text-muted);
}

.course-sched {
    font-size: 0.9rem;
    font-weight: 500;
}

.alts {
    font-size: 0.8rem;
    color: var(--warning);
    margin-top: 8px;
}

/* Audit Section */
.audit-section {
    padding: 40px 0 80px 0;
    border-top: 1px solid var(--border);
}

.audit-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 32px;
}

.audit-col {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.audit-group h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 12px 0;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
}

.audit-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.audit-info {
    display: flex;
    flex-direction: column;
}

.audit-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.audit-course {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.audit-status {
    text-align: right;
}

.status-pill {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 4px;
    margin-bottom: 2px;
}

.completed .status-pill {
    background: var(--success-bg);
    color: var(--success);
}

.planned .status-pill {
    background: var(--planned-bg);
    color: var(--planned);
}

.missing .status-pill {
    background: var(--error-bg);
    color: var(--error);
}

.audit-term {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Footer */
.main-footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

/* Mobile Responsive */
@media (max-width: 1100px) {
    body {
        overflow-x: hidden;
    }

    .container {
        padding: 0 16px;
    }

    .top-content {
        grid-template-columns: 1fr;
        padding-top: 20px;
        overflow: hidden;
    }

    .plans-grid {
        display: flex;
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 20px;
        scroll-snap-type: x mandatory;
        max-height: none;
        gap: 12px;
        width: 100vw;
        margin-left: -16px;
        padding-left: 16px;
        padding-right: 16px;
        box-sizing: border-box;
        -webkit-overflow-scrolling: touch;
    }

    .plan-card {
        min-width: 260px;
        scroll-snap-align: center;
    }

    .plan-card:hover {
        transform: none;
        box-shadow: none;
    }

    .audit-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .audit-col {
        gap: 40px;
    }
}