/* 
 * DesignRiver - Advanced CorelDRAW Manipulation Course
 * Obsidian Luxury Minimalist Design System
 * Completely human-crafted, non-AI aesthetic
 */

:root {
    --bg-dark: #070709;
    --bg-surface: #0c0d11;
    --bg-card: #121317;
    --bg-card-hover: #181920;
    --bg-input: #0a0a0d;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.18);
    --border-focus: rgba(255, 255, 255, 0.35);
    
    --primary: #ffffff;
    --primary-hover: #e4e4e7;
    --primary-text: #070709;
    --accent: #f4f4f5;
    --accent-muted: #a1a1aa;
    --accent-green: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;

    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.7);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.85);

    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 75px;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
    color: #ffffff;
    opacity: 0.9;
}

/* Container */
.container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-narrow {
    max-width: 680px;
}

/* Navbar */
.navbar {
    background: rgba(7, 7, 9, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.brand-logo-img {
    width: 34px;
    height: 34px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.08);
}

.brand-logo span {
    color: #ffffff;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.92rem;
    letter-spacing: -0.01em;
}

.nav-links a:hover {
    color: #ffffff;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    text-align: center;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: #ffffff;
    color: #070709;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.08);
}

.btn-primary:hover {
    background: #e4e4e7;
    color: #000000;
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(255, 255, 255, 0.15);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #f4f4f5;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    transform: translateY(-1px);
}

.btn-success {
    background: rgba(52, 211, 153, 0.15);
    color: #34d399;
    border: 1px solid rgba(52, 211, 153, 0.35);
}

.btn-success:hover {
    background: rgba(52, 211, 153, 0.25);
    color: #ffffff;
}

.btn-block {
    width: 100%;
    display: flex;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.02rem;
    border-radius: var(--radius-md);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: var(--radius-full);
    font-size: 0.76rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.badge-glow {
    background: rgba(255, 255, 255, 0.05);
    color: #d4d4d8;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.badge-success {
    background: rgba(52, 211, 153, 0.12);
    color: #34d399;
    border: 1px solid rgba(52, 211, 153, 0.25);
}

.badge-warning {
    background: rgba(251, 191, 36, 0.12);
    color: var(--warning);
    border: 1px solid rgba(251, 191, 36, 0.25);
}

.badge-danger {
    background: rgba(248, 113, 113, 0.12);
    color: var(--danger);
    border: 1px solid rgba(248, 113, 113, 0.25);
}

/* ========================================================= */
/* Obsidian Hero Section (Cinematic Image Background)        */
/* ========================================================= */
.hero-obsidian {
    position: relative;
    min-height: 80vh;
    min-height: 560px;
    display: flex;
    align-items: center;
    background-color: #070709;
    padding: 80px 0 65px;
    overflow: hidden;
}

/* Photo manipulation slides wrapper with smooth cinematic cross-fade */
.hero-slides-wrapper {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center right;
    background-repeat: no-repeat;
    opacity: 0;
    filter: contrast(1.08) brightness(1.02);
    transform: scale(1.04);
    transition: opacity 1.6s cubic-bezier(0.4, 0, 0.2, 1), transform 8s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.hero-slide.active {
    opacity: 1;
    transform: scale(1);
    z-index: 2;
}

/* Minimal translucent gradient so the artwork is vividly visible across the screen */
.hero-obsidian-overlay {
    position: absolute;
    inset: 0;
    z-index: 3;
    background: 
        /* Soft localized left vignette allowing 100% clarity of artwork center-right */
        linear-gradient(90deg, rgba(7, 7, 9, 0.85) 0%, rgba(7, 7, 9, 0.6) 35%, rgba(7, 7, 9, 0.15) 60%, transparent 100%),
        /* Top & bottom subtle seam fade */
        linear-gradient(180deg, rgba(7, 7, 9, 0.5) 0%, transparent 15%, transparent 85%, #070709 100%);
    pointer-events: none;
}

/* Slide Indicator Dots at bottom center of hero */
.hero-slide-indicators {
    position: absolute;
    bottom: 24px;
    right: 36px;
    z-index: 4;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hero-dot {
    width: 28px;
    height: 3px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    transition: all 0.4s ease;
    padding: 0;
}

.hero-dot:hover {
    background: rgba(255, 255, 255, 0.5);
}

.hero-dot.active {
    background: #ffffff;
    width: 44px;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.hero-obsidian .hero-container {
    position: relative;
    z-index: 3;
    width: 100%;
}

.hero-obsidian .hero-content {
    max-width: 640px;
    text-align: left;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 0;
    border: none;
    box-shadow: none;
}

.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.74rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.hero-obsidian .hero-title {
    font-size: clamp(2.2rem, 4.5vw, 3.4rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.035em;
    color: #ffffff;
    margin-bottom: 18px;
    text-align: left;
}

.hero-obsidian .hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 28px;
    text-align: left;
    max-width: 530px;
}

.hero-cta-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 26px;
}

.hero-micro {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.82rem;
    color: var(--text-muted);
    letter-spacing: 0.01em;
}

.hero-micro .dot {
    color: rgba(255, 255, 255, 0.2);
    font-size: 0.9rem;
}

/* Sections Common */
.section {
    padding: 80px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 50px;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    color: #ffffff;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 30px;
    transition: all 0.25s ease;
}

.card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.card-num {
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin-bottom: 16px;
    display: inline-block;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.6;
}

/* Curriculum / 12 Lessons Cards */
.curriculum-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.lesson-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.2s ease;
}

.lesson-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.lesson-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #090a0d;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.lesson-thumb svg, .lesson-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lesson-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    font-weight: 700;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lesson-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.lesson-number {
    font-size: 0.74rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 6px;
}

.lesson-title {
    font-size: 1.02rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #ffffff;
    letter-spacing: -0.015em;
}

.lesson-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Showcase Gallery */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 28px;
}

.showcase-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.showcase-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.showcase-img-wrap {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
    background: #090a0d;
}

.showcase-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.showcase-card:hover .showcase-img-wrap img {
    transform: scale(1.02);
}

.showcase-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.showcase-tag {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin-bottom: 8px;
}

.showcase-title {
    font-size: 1.12rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
    line-height: 1.35;
    letter-spacing: -0.015em;
}

.showcase-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.55;
}

/* Benefit Cards */
.benefit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 26px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: all 0.2s ease;
}

.benefit-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.benefit-num {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

/* Final CTA Section */
.final-cta-box {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* Pricing Card */
.pricing-section {
    background: var(--bg-surface);
}

.pricing-box {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-lg);
    padding: 45px 35px;
    max-width: 560px;
    margin: 0 auto;
    text-align: center;
    box-shadow: 0 24px 60px -12px rgba(0, 0, 0, 0.9);
    position: relative;
}

.pricing-badge-top {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: #ffffff;
    color: #070709;
    padding: 5px 18px;
    border-radius: var(--radius-full);
    font-size: 0.74rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
}

.pricing-title {
    font-size: 1.45rem;
    font-weight: 800;
    margin-top: 10px;
    margin-bottom: 8px;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 12px;
    margin: 22px 0;
}

.price-current {
    font-size: 3.2rem;
    font-weight: 900;
    color: #ffffff;
    line-height: 1;
    letter-spacing: -0.03em;
}

.price-original {
    font-size: 1.35rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

.price-discount-tag {
    background: rgba(52, 211, 153, 0.12);
    color: #34d399;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid rgba(52, 211, 153, 0.25);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin: 28px 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.96rem;
}

.pricing-features li svg {
    flex-shrink: 0;
    color: #34d399;
}

.pricing-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* FAQ Accordion */
.faq-list {
    max-width: 740px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.02rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    font-family: inherit;
}

.faq-icon {
    transition: transform 0.3s ease;
    flex-shrink: 0;
    color: var(--text-muted);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: #ffffff;
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.6;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Forms & Checkout Styles */
.form-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    color: #ffffff;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.form-control {
    width: 100%;
    padding: 13px 16px;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: #ffffff;
    font-size: 0.96rem;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Country Selector Switch */
.country-toggle {
    display: flex;
    background: var(--bg-input);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.country-option {
    flex: 1;
    padding: 12px;
    text-align: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.country-option.active {
    background: #ffffff;
    color: #070709;
    font-weight: 700;
}

/* Bank Account Detail Card */
.bank-card {
    background: #0d0e12;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 24px;
    margin: 24px 0;
    text-align: left;
}

.bank-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.bank-row:last-child {
    border-bottom: none;
}

.bank-label {
    font-size: 0.86rem;
    color: var(--text-secondary);
}

.bank-val {
    font-size: 1.02rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-copy {
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-copy:hover {
    background: rgba(255, 255, 255, 0.16);
}

/* Alerts */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.alert-success {
    background: rgba(52, 211, 153, 0.12);
    border: 1px solid rgba(52, 211, 153, 0.3);
    color: #34d399;
}

.alert-danger {
    background: rgba(248, 113, 113, 0.12);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: #f87171;
}

.alert-info {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: #e4e4e7;
}

/* Sticky Mobile CTA Bar */
.sticky-mobile-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(7, 7, 9, 0.95);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-top: 1px solid var(--border-color);
    padding: 12px 16px;
    display: none;
    z-index: 99;
}

.sticky-cta-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 500px;
    margin: 0 auto;
    gap: 15px;
}

.sticky-price-info {
    display: flex;
    flex-direction: column;
}

.sticky-price-label {
    font-size: 0.74rem;
    color: var(--text-secondary);
}

.sticky-price-val {
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.02em;
}

/* Footer */
.site-footer {
    background: #050507;
    border-top: 1px solid var(--border-color);
    padding: 50px 0 90px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.88rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin: 20px 0;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.footer-links a:hover {
    color: #ffffff;
}

/* Responsive Queries */
@media (max-width: 900px) {
    .hero-obsidian {
        min-height: auto;
        padding: 48px 0 50px;
    }
    
    .hero-slide {
        background-position: center right;
        opacity: 0;
        filter: contrast(1.05) brightness(1.02);
    }
    
    .hero-slide.active {
        opacity: 0.92;
    }

    .hero-obsidian-overlay {
        background: 
            linear-gradient(180deg, rgba(7, 7, 9, 0.4) 0%, rgba(7, 7, 9, 0.75) 60%, #070709 100%),
            linear-gradient(90deg, rgba(7, 7, 9, 0.8) 0%, rgba(7, 7, 9, 0.4) 100%);
    }
    
    .hero-obsidian .hero-content {
        max-width: 100%;
        text-align: left;
        padding: 0;
    }

    .hero-slide-indicators {
        bottom: 12px;
        right: 20px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    /* Keep the course artwork visible on narrow screens instead of cropping it
       behind the hero copy. The image occupies its own top panel while the
       heading and actions remain readable on the dark section below. */
    .hero-obsidian {
        min-height: 0;
        padding: 318px 0 56px;
        align-items: flex-start;
    }

    .hero-slides-wrapper {
        inset: 0 0 auto;
        height: 300px;
    }

    .hero-slide {
        background-position: center center;
        background-size: cover;
    }

    .hero-slide.active {
        opacity: 1;
    }

    .hero-obsidian-overlay {
        background: linear-gradient(180deg, rgba(7, 7, 9, 0.04) 0%, rgba(7, 7, 9, 0.12) 42%, #070709 300px, #070709 100%);
    }

    .hero-slide-indicators {
        top: 270px;
        right: 16px;
        bottom: auto;
    }
    
    .hero-obsidian .hero-title {
        font-size: 2.3rem;
    }

    .hero-cta-wrap {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta-wrap .btn {
        width: 100%;
    }

    .hero-micro {
        flex-wrap: wrap;
        gap: 8px;
    }

    .pricing-box {
        padding: 32px 20px;
    }

    .price-current {
        font-size: 2.6rem;
    }

    .form-container {
        padding: 24px 18px;
    }

    .showcase-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .benefit-card {
        padding: 20px;
        gap: 14px;
    }

    .final-cta-box {
        padding: 40px 20px;
    }

    .sticky-mobile-cta {
        display: block;
    }
}

/* ========================================================= */
/* Creative Manipulation Lighting Effects & Animations       */
/* ========================================================= */

/* 1. Scroll Progress Glowing Light Beam */
.scroll-light-beam {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: #ffffff;
    box-shadow: 
        0 0 6px rgba(255, 255, 255, 1),
        0 0 14px rgba(255, 255, 255, 0.8),
        0 0 24px rgba(255, 255, 255, 0.5);
    z-index: 1000;
    transition: width 0.08s ease-out;
    pointer-events: none;
}

/* 2. Ambient Floating Glowing Orbs */
.ambient-glow-orb {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    filter: blur(120px);
    opacity: 0.22;
    transition: transform 0.4s ease-out;
}

.ambient-glow-orb.orb-1 {
    width: 500px;
    height: 500px;
    top: 15%;
    right: -100px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.5) 0%, rgba(99, 102, 241, 0.2) 60%, transparent 80%);
    animation: orbFloat1 18s ease-in-out infinite alternate;
}

.ambient-glow-orb.orb-2 {
    width: 600px;
    height: 600px;
    top: 55%;
    left: -200px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.4) 0%, rgba(236, 72, 153, 0.15) 60%, transparent 80%);
    animation: orbFloat2 22s ease-in-out infinite alternate;
}

.ambient-glow-orb.orb-3 {
    width: 450px;
    height: 450px;
    bottom: 5%;
    right: 5%;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.3) 0%, rgba(56, 189, 248, 0.15) 60%, transparent 80%);
    animation: orbFloat1 20s ease-in-out infinite alternate-reverse;
}

@keyframes orbFloat1 {
    0% { transform: translateY(0) scale(1) rotate(0deg); }
    50% { transform: translateY(80px) scale(1.15) rotate(15deg); }
    100% { transform: translateY(-40px) scale(0.95) rotate(-10deg); }
}

@keyframes orbFloat2 {
    0% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-70px) scale(1.1); }
    100% { transform: translateY(50px) scale(0.9); }
}

/* 3. Interactive Mouse Spotlight following user cursor */
.cursor-spotlight {
    position: fixed;
    top: 0;
    left: 0;
    width: 400px;
    height: 400px;
    margin-left: -200px;
    margin-top: -200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 40%, transparent 70%);
    pointer-events: none;
    z-index: 99;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

body:hover .cursor-spotlight {
    opacity: 1;
}

/* 4. Card Specular Beam Glow & Shimmer */
.card-beam-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.25) 0%, rgba(255, 255, 255, 0.05) 30%, transparent 60%);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease, transform 0.6s ease;
    mix-blend-mode: overlay;
}

.fx-card {
    position: relative;
    overflow: hidden;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease, border-color 0.35s ease;
}

.fx-card:hover {
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.8), 0 0 24px rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.fx-card:hover .card-beam-glow {
    opacity: 1;
    transform: scale(1.05);
}

/* 5. Scroll Reveal Lighting on Section Headers and Cards */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 6. Glowing Border Pulse for Hero Kicker and Primary Badges */
.badge-glow {
    position: relative;
    overflow: hidden;
}

.badge-glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(60deg, transparent 30%, rgba(255, 255, 255, 0.15) 50%, transparent 70%);
    transform: rotate(25deg);
    animation: badgeShine 4.5s infinite;
}

@keyframes badgeShine {
    0% { transform: translateX(-100%) rotate(25deg); }
    25%, 100% { transform: translateX(100%) rotate(25deg); }
}

/* 7. Subtle Breathing Glow on Main Artwork */
.hero-obsidian-backdrop {
    animation: subtleBreathe 14s ease-in-out infinite alternate;
}

@keyframes subtleBreathe {
    0% { transform: scale(1); filter: contrast(1.08) brightness(1.02); }
    100% { transform: scale(1.03); filter: contrast(1.12) brightness(1.06); }
}

/* ========================================================= */
/* 8. Obsidian Floating Back-to-Top Button                   */
/* ========================================================= */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 28px;
    z-index: 100;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(14, 14, 20, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 16px rgba(255, 255, 255, 0.05);
    opacity: 0;
    visibility: hidden;
    transform: translateY(18px) scale(0.9);
    transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
                visibility 0.35s ease,
                border-color 0.2s ease,
                background 0.2s ease,
                box-shadow 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.back-to-top:hover {
    background: rgba(26, 26, 38, 0.96);
    border-color: rgba(255, 255, 255, 0.4);
    color: #ffffff;
    transform: translateY(-3px) scale(1.06);
    box-shadow: 0 14px 38px rgba(0, 0, 0, 0.75), 0 0 24px rgba(255, 255, 255, 0.16);
}

.back-to-top:active {
    transform: translateY(0) scale(0.96);
}

.back-to-top svg {
    transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 84px;
        right: 18px;
        width: 44px;
        height: 44px;
    }
}