/**
 * Professional Homepage Styles
 * Udemy/Alison-inspired design
 */

/* ===================================
   HERO SECTION - PROFESSIONAL (MOBILE OPTIMIZED)
   =================================== */
.hero-pro {
    position: relative;
    padding: var(--spacing-lg) 0 var(--spacing-xl) 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--vskul-navy) 0%, var(--vskul-blue) 100%);
    color: white;
    min-height: auto;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-left {
    z-index: 1;
    padding: 0;
}

.hero-title-xl {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: white;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.hero-subtitle-xl {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* Hero Search Bar - Mobile Optimized */
.hero-search-bar {
    margin-bottom: var(--spacing-md);
    max-width: 100%;
}

.search-form-main {
    display: flex;
    align-items: center;
    background: white;
    border-radius: var(--radius-full);
    padding: 0.25rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transition: var(--transition);
}

.search-form-main:focus-within {
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

.search-icon {
    margin-left: var(--spacing-sm);
    color: var(--gray-500);
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}

.search-input-main {
    flex: 1;
    border: none;
    padding: 0.625rem var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--gray-900);
    background: transparent;
    min-width: 0;
}

.search-input-main:focus {
    outline: none;
}

.search-input-main::placeholder {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.btn-search-main {
    background: var(--vskul-blue);
    color: white;
    border: none;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-search-main:hover {
    background: var(--vskul-navy);
}

/* Hero Trust Badges - Mobile Optimized */
.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    row-gap: var(--spacing-xs);
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    opacity: 0.95;
}

.badge-item svg {
    flex-shrink: 0;
    width: 14px;
    height: 14px;
}

/* Hero Right Side */
.hero-right {
    display: none;
}

.hero-image-container {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.hero-placeholder {
    width: 100%;
    height: auto;
}

.hero-placeholder svg {
    width: 100%;
    height: auto;
    display: block;
}

/* ===================================
   STATS BAR
   =================================== */
.stats-bar {
    background: white;
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--gray-200);
}

.stats-grid-bar {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.stat-item-bar {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--vskul-blue);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* ===================================
   SECTION HEADERS
   =================================== */
.section-header-pro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header-pro.center {
    text-align: center;
}

.section-title-big {
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle-gray {
    font-size: 1.125rem;
    color: var(--gray-600);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

.section-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.link-view-all-pro {
    color: var(--vskul-blue);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
}

.link-view-all-pro:hover {
    color: var(--vskul-navy);
    transform: translateX(4px);
}

/* ===================================
   CATEGORIES SECTION
   =================================== */
.categories-pro {
    padding: var(--spacing-2xl) 0;
    background: var(--gray-50);
}

.categories-grid-pro {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.category-card-hover {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.category-card-hover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--cat-color);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.category-card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.1);
    border-color: var(--cat-color);
}

.category-card-hover:hover::before {
    transform: scaleX(1);
}

.category-icon-big {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.category-name-big {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.category-count-text {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-sm);
}

.category-arrow-icon {
    font-size: 1.5rem;
    color: var(--vskul-blue);
    opacity: 0;
    transition: var(--transition);
}

.category-card-hover:hover .category-arrow-icon {
    opacity: 1;
    transform: translateX(4px);
}

/* ===================================
   COURSES SECTION
   =================================== */
.courses-pro {
    padding: var(--spacing-2xl) 0;
}

.courses-grid-modern {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.course-card-modern {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-200);
}

.course-card-modern:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.15);
    border-color: var(--vskul-blue);
}

/* Course Thumbnail */
.course-thumbnail-modern {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 aspect ratio */
    background: var(--gray-200);
    overflow: hidden;
}

.course-thumbnail-modern img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-img-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.course-img-placeholder svg {
    width: 100%;
    height: 100%;
    display: block;
}

.badge-best {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    background: #F59E0B;
    color: white;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Course Body */
.course-body-modern {
    padding: var(--spacing-md);
}

/* Instructor Mini */
.instructor-mini {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.avatar-mini {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--vskul-navy), var(--vskul-blue));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.name-mini {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* Course Title */
.course-title-modern {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-title-modern a {
    color: var(--gray-900);
    transition: var(--transition);
}

.course-title-modern a:hover {
    color: var(--vskul-blue);
}

/* Course Description */
.course-desc-short {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Rating Bar */
.rating-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.stars-filled {
    color: #F59E0B;
    font-size: 0.875rem;
    letter-spacing: 1px;
}

.rating-num {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--gray-900);
}

.rating-reviews {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Meta Bar */
.meta-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--gray-200);
}

.meta-item-icon {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.meta-item-icon svg {
    flex-shrink: 0;
}

/* Price Bar */
.price-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.price-tag {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--vskul-blue);
}

.price-tag.free {
    color: var(--success);
}

/* Section CTA */
.section-cta-center {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* ===================================
   FEATURES SECTION
   =================================== */
.features-pro {
    padding: var(--spacing-2xl) 0;
    background: white;
}

.features-grid-modern {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.feature-card-modern {
    text-align: center;
}

.feature-icon-circle {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.feature-title-modern {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.feature-text-modern {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.6;
    max-width: 400px;
    margin: 0 auto;
}

/* ===================================
   CTA SECTION
   =================================== */
.cta-pro {
    position: relative;
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--vskul-navy) 0%, var(--vskul-blue) 100%);
    color: white;
    overflow: hidden;
}

.cta-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 80% 50%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.cta-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.cta-left {
    z-index: 1;
}

.cta-title-xl {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: white;
}

.cta-subtitle-xl {
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    max-width: 600px;
}

.cta-benefits {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.cta-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
    font-weight: 500;
}

.cta-benefits svg {
    flex-shrink: 0;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.btn-text-white {
    color: white;
    font-weight: 600;
    font-size: 1rem;
    padding: 0.75rem 0;
    transition: var(--transition);
}

.btn-text-white:hover {
    opacity: 0.8;
    transform: translateX(4px);
}

.cta-right {
    display: none;
}

.cta-image-placeholder svg {
    width: 100%;
    height: auto;
    display: block;
}

/* ===================================
   RESPONSIVE - TABLET (768px+)
   =================================== */
@media (min-width: 768px) {
    /* Hero */
    .hero-title-xl {
        font-size: 3rem;
    }
    
    .hero-subtitle-xl {
        font-size: 1.375rem;
    }
    
    .hero-right {
        display: block;
    }
    
    .hero-wrapper {
        grid-template-columns: 1fr 1fr;
    }
    
    /* Stats */
    .stats-grid-bar {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    /* Categories */
    .categories-grid-pro {
        grid-template-columns: repeat(4, 1fr);
    }
    
    /* Courses */
    .courses-grid-modern {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Features */
    .features-grid-modern {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* CTA */
    .cta-right {
        display: block;
    }
    
    .cta-wrapper {
        grid-template-columns: 1fr 1fr;
    }
}

/* ===================================
   RESPONSIVE - DESKTOP (1024px+)
   =================================== */
@media (min-width: 1024px) {
    /* Hero */
    .hero-title-xl {
        font-size: 3.5rem;
    }
    
    /* Courses */
    .courses-grid-modern {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* Features */
    .features-grid-modern {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===================================
   RESPONSIVE - LARGE DESKTOP (1280px+)
   =================================== */
@media (min-width: 1280px) {
    .courses-grid-modern {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===================================
   BUTTON UTILITIES
   =================================== */
.btn-text-link {
    color: var(--vskul-blue);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.btn-text-link:hover {
    color: var(--vskul-navy);
    transform: translateX(4px);
}