/*
 * /public_html/assets/css/course_overview.css
 * Centralized Visual Facelift for Course Overview (Index) Pages
 * Designed with a premium minimalist Stations layout aesthetic.
 */

/* ==========================================================================
   1. Spacing & Page Containers
   ========================================================================== */

.course-page-content h2 {
    color: var(--text-color);
    font-weight: 500;
    letter-spacing: -0.02em;
}

/* Generous breathing room between major sections */
.why-choose-us,
.course-level,
.overall-achievement {
    margin-bottom: 5.5rem !important;
}

/* ==========================================================================
   2. Course Level Cards
   ========================================================================== */

.course-level {
    padding: 3rem !important;
    background-color: var(--surface-color) !important;
    border-radius: 16px !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--box-shadow) !important;
}

@media (max-width: 768px) {
    .course-level {
        padding: 1.75rem !important;
    }
}

.course-level h2 {
    font-size: 1.75rem !important;
    font-weight: 500 !important;
    color: var(--primary-color) !important;
    margin-bottom: 1.5rem !important;
    letter-spacing: -0.02em;
}

.course-level h2 i {
    vertical-align: middle;
}

.course-level p {
    font-size: 1.1rem !important;
    line-height: 1.75 !important;
    color: var(--text-color) !important;
    margin-bottom: 1.25rem !important;
}

.course-level ul {
    padding-left: 1.5rem !important;
    margin-bottom: 2rem !important;
}

.course-level li {
    font-size: 1.05rem !important;
    color: var(--text-color) !important;
    margin-bottom: 0.5rem !important;
    line-height: 1.6 !important;
}

.chapter-link-section {
    margin-top: 3rem !important;
    padding-top: 2rem !important;
    border-top: 1px solid var(--border-color) !important;
}

.chapter-link-section h5 {
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.05em !important;
    color: var(--text-muted-color) !important;
    margin-bottom: 1.5rem !important;
}

/* ==========================================================================
   3. Hero Course Overview
   ========================================================================== */

.hero-course-overview {
    color: #ffffff !important;
    text-align: center;
    padding: 5.5rem 2rem !important;
    margin-bottom: 5rem !important;
    border-radius: 16px !important;
    position: relative;
    overflow: hidden;
    border: none !important;
    box-shadow: var(--box-shadow) !important;
}

.hero-course-overview::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") !important;
    z-index: 0;
}

.hero-course-overview > * {
    position: relative;
    z-index: 1;
}

.hero-course-overview h1 {
    font-size: 2.75rem !important;
    font-weight: 300 !important; /* Premium light style */
    letter-spacing: -0.03em !important;
    color: #ffffff !important;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.15) !important;
    margin-bottom: 1.25rem !important;
}

.hero-course-overview .lead {
    font-size: 1.25rem !important;
    max-width: 820px;
    margin: 0 auto 1.5rem auto !important;
    opacity: 0.95;
    font-weight: 400 !important;
    line-height: 1.6 !important;
}

.hero-course-overview p:not(.lead) {
    max-width: 720px;
    margin: 0 auto 2.25rem auto !important;
    opacity: 0.9;
    font-size: 1.05rem !important;
    line-height: 1.7 !important;
}

.hero-course-overview .btn-light {
    font-weight: 600 !important;
    padding: 12px 32px !important;
    border-radius: 50px !important;
    font-size: 1rem !important;
    box-shadow: var(--box-shadow) !important;
    transition: all 0.2s ease-in-out !important;
}

.hero-course-overview .btn-light:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15) !important;
}

/* ==========================================================================
   4. Why Choose Us Section
   ========================================================================== */

.why-choose-us {
    text-align: center;
}

.why-choose-us h2 {
    font-size: 2rem !important;
    font-weight: 400 !important;
    letter-spacing: -0.02em;
    color: var(--text-color) !important;
    margin-bottom: 0.5rem !important;
}

.why-choose-us hr {
    border-color: var(--border-color) !important;
    opacity: 0.5 !important;
    margin-bottom: 3.5rem !important;
}

.why-choose-us .features-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2.5rem;
}

.why-choose-us .feature-item {
    flex: 1;
    min-width: 280px;
    padding: 1.5rem !important;
    background-color: var(--surface-color) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 12px !important;
    box-shadow: var(--box-shadow) !important;
    transition: transform 0.2s ease !important;
}

.why-choose-us .feature-item:hover {
    transform: translateY(-3px) !important;
}

.why-choose-us .feature-icon {
    font-size: 2.75rem !important;
    color: var(--primary-color) !important;
    margin-top: 0.5rem !important;
    margin-bottom: 1.25rem !important;
}

.why-choose-us h5 {
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    color: var(--text-color) !important;
    margin-bottom: 0.75rem !important;
}

.why-choose-us p {
    font-size: 0.95rem !important;
    line-height: 1.6 !important;
    color: var(--text-muted-color) !important;
    margin-bottom: 0 !important;
}

/* ==========================================================================
   5. Chapter Link Rows
   ========================================================================== */

.chapter-link-row {
    display: grid !important;
    grid-template-columns: 1fr 180px !important;
    align-items: center !important;
    gap: 1.5rem !important;
    padding: 1rem 0 !important;
    border-bottom: 1px solid var(--border-color) !important;
}

@media (max-width: 768px) {
    .chapter-link-row {
        grid-template-columns: 1fr !important;
        gap: 0.75rem !important;
        padding: 1.25rem 0 !important;
    }
    .chapter-link-flashcards {
        width: 100% !important;
    }
}

.chapter-link-row:last-of-type {
    border-bottom: none !important;
}

.chapter-link-title {
    width: 100% !important;
}

/* Outlined Chapter Link Buttons */
.chapter-link-title a {
    display: block !important;
    padding: 12px 20px !important;
    text-decoration: none !important;
    color: var(--primary-color) !important;
    background-color: transparent !important;
    border: 1px solid var(--border-color) !important; /* Muted border until hover */
    border-radius: 10px !important;
    transition: all 0.2s ease-in-out !important;
    font-weight: 500 !important;
    text-align: left !important;
    font-size: 1.05rem !important;
}

.chapter-link-title a:hover {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    color: #ffffff !important;
    transform: translateY(-2px) !important;
    box-shadow: var(--box-shadow) !important;
}

.chapter-link-title a .fas {
    margin-right: 0.75rem !important;
}

.chapter-link-flashcards .btn-outline-warning {
    padding: 10px 15px !important;
    border-radius: 10px !important;
    font-size: 0.95rem !important;
    font-weight: 500 !important;
    transition: all 0.2s ease !important;
}

.chapter-link-flashcards .btn-outline-warning:hover {
    transform: translateY(-2px) !important;
    box-shadow: var(--box-shadow) !important;
}

/* ==========================================================================
   6. Reference Hub & Achievements
   ========================================================================== */

/* Reference Banner Card */
.course-level.border-info {
    border-color: var(--primary-color) !important;
    background-color: var(--background-color) !important;
}

/* Overall Achievement Panel */
.overall-achievement {
    background-color: var(--background-color) !important;
    border: 1px solid var(--border-color) !important;
    padding: 2.5rem !important;
    border-radius: 16px !important;
}

.overall-achievement h3 {
    font-size: 1.5rem !important;
    font-weight: 500 !important;
    margin-bottom: 1rem !important;
}