/* ==========================================================================
   COHESIVE CLINICAL DESIGN SYSTEM (UWorld Style)
   ==========================================================================
   - Palette: #ffffff (Surface), #0f172a (Navy text), #64748b (Slate subtext), #e2e8f0 (Borders)
   - Layout: Responsive Grid (Auto-wrapping to 2 rows if needed)
   - Animations: Smooth, premium. Icon slight scale and color activation on hover.
   - Text: NEVER truncates or cuts off.
   - NO BOX-SHADOWS (kept strictly flat and clean).
   ========================================================================== */

:root {
    --color-surface: #ffffff;
    --color-bg-body: #ffffff; /* Forced white background to remove Moodle's gray iframe background */
    --color-bg-hover: #eef2ff; /* Unified light lavender/blue tint */
    --color-text-main: #0f172a;
    --color-text-sub: #64748b;
    --color-border: #94a3b8; /* Darker, more visible border */
    
    /* Token accents */
    --accent-blue: #2563eb;
    --accent-purple: #9333ea;
    --accent-red: #e11d48;
    --accent-orange: #ea580c;
    --accent-green: #16a34a;
    --accent-indigo: #4f46e5;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--color-bg-body);
}

.nav-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px;
    box-sizing: border-box;
}

/* Base Grid (Desktop: 3 columns) */
.course-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    width: 100%;
    max-width: 1082px; /* Exactly 3 cards (3*350) + 2 gaps (2*16) */
    margin: 0 auto;
}

/* Clinical Card */
.course-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    transition: all 0.2s ease-in-out;
    
    /* STRICT FIXED SIZE - NEVER SHRINKS OR GROWS */
    width: 350px !important;
    height: 100px !important;
    flex: 0 0 350px !important;
    max-width: none !important;
    box-sizing: border-box;
    
    /* NO SHADOWS - strict requirement */
    box-shadow: none !important;
}

/* Hover Animation: Smooth background tint and border activation */
.course-card:hover {
    background-color: var(--color-bg-hover);
    transform: translateY(-2px); /* Very slight lift, premium feel */
}

/* Icon Container */
.card-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-sub);
    transition: all 0.2s ease-in-out;
}

/* Text Content - NO TRUNCATION */
.card-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.card-title {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-main);
    line-height: 1.3;
}

.card-subtitle {
    margin: 0;
    font-size: 12px;
    font-weight: 400;
    color: var(--color-text-sub);
    line-height: 1.4;
}

/* Arrow indicator on the right */
.card-arrow {
    flex-shrink: 0;
    color: var(--color-border);
    transition: color 0.2s ease-in-out, transform 0.2s ease-in-out;
}

/* ==========================================================================
   SPECIFIC HOVER STATES & ACCENT COLORS
   ========================================================================== */

/* Blue */
.course-card:hover .card-icon.blue {
    color: var(--accent-blue);
    border-color: var(--accent-blue);
    transform: scale(1.05);
}
.course-card:hover:has(.blue) { border-color: var(--accent-blue); }

/* Purple */
.course-card:hover .card-icon.purple {
    color: var(--accent-purple);
    border-color: var(--accent-purple);
    transform: scale(1.05);
}
.course-card:hover:has(.purple) { border-color: var(--accent-purple); }

/* Red */
.course-card:hover .card-icon.red {
    color: var(--accent-red);
    border-color: var(--accent-red);
    transform: scale(1.05);
}
.course-card:hover:has(.red) { border-color: var(--accent-red); }

/* Orange */
.course-card:hover .card-icon.orange {
    color: var(--accent-orange);
    border-color: var(--accent-orange);
    transform: scale(1.05);
}
.course-card:hover:has(.orange) { border-color: var(--accent-orange); }

/* Green */
.course-card:hover .card-icon.green {
    color: var(--accent-green);
    border-color: var(--accent-green);
    transform: scale(1.05);
}
.course-card:hover:has(.green) { border-color: var(--accent-green); }

/* Indigo */
.course-card:hover .card-icon.indigo {
    color: var(--accent-indigo);
    border-color: var(--accent-indigo);
    transform: scale(1.05);
}
.course-card:hover:has(.indigo) { border-color: var(--accent-indigo); }

/* Arrow lights up and moves slightly */
.course-card:hover .card-arrow {
    color: var(--color-text-main);
    transform: translateX(4px);
}

/* ==========================================================================
   MOBILE RESPONSIVENESS (SLIDER)
   ========================================================================== */
.slider-indicators {
    display: none;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #cbd5e1;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    background-color: var(--accent-blue);
    width: 24px;
    border-radius: 4px;
}

/* Slider for 2 Cards (when 3 cards don't fit securely) */
@media (max-width: 1100px) {
    .nav-container {
        padding: 16px 0; 
    }
    .course-grid {
        display: flex;
        flex-wrap: nowrap;
        justify-content: flex-start !important; /* CRITICAL: Prevents left-side cutoff of slider items */
        gap: 16px;
        width: 716px; /* Exactly 2 cards (350px) + 1 gap (16px) */
        max-width: 100vw;
        margin: 0 auto; /* Center the entire slider block */
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        scrollbar-width: none; /* Firefox */
        -ms-overflow-style: none; /* IE/Edge */
        padding-bottom: 8px; 
    }
    .course-grid::-webkit-scrollbar {
        display: none; /* Chrome/Safari */
    }
    .course-card {
        scroll-snap-align: start; /* Snap precisely to the left edge of the visible container */
    }
}

/* Slider for 1 Card (when 2 cards don't fit) */
@media (max-width: 750px) {
    .course-grid {
        width: 350px; /* Exactly 1 card */
    }
}