/* Brand Color Tokens & Variables */
:root {
    --bg-dark: #000000;
    --bg-card: rgba(0, 0, 0, 0.95);
    --bg-nav: rgba(0, 0, 0, 0.9);
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.7);
    --text-dim: rgba(255, 255, 255, 0.45);
    --accent: #4daeeb; /* Octane Blue */
    --accent-glow: rgba(77, 174, 235, 0.15);
    --accent-glow-strong: rgba(77, 174, 235, 0.4);
    --border: rgba(255, 255, 255, 0.15);
    --border-hover: rgba(77, 174, 235, 0.3);
    
    /* Unified Brand Themes */
    --theme-intro: #4daeeb;
    --theme-pafe: #4daeeb;
    --theme-paw: #4daeeb;
    --theme-rules: #4daeeb;
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Roboto', sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background-color: var(--bg-nav);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo img {
    height: 32px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 5px 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-main);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 160px 20px 100px;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    text-align: center;
}

.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow-strong) 0%, transparent 70%);
    top: -10%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    filter: blur(80px);
    animation: pulse 10s infinite alternate ease-in-out;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.9); opacity: 0.7; }
    100% { transform: translate(-50%, -50%) scale(1.1); opacity: 1; }
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}

.badge {
    background-color: var(--accent-glow);
    border: 1px solid var(--accent);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 25px;
    box-shadow: 0 0 15px var(--accent-glow);
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.hero h1 .highlight {
    color: var(--accent);
    text-shadow: 0 0 20px var(--accent-glow-strong);
}

.hero .subtitle {
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 40px;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Button UI */
.btn {
    text-decoration: none;
    padding: 15px 35px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-block;
    border: none;
}

.primary-btn {
    background-color: var(--accent);
    color: var(--bg-dark);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--accent-glow-strong);
}

.outline-btn {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.outline-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Courses Catalog Section */
.courses-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 550px;
    margin: 0 auto;
}

/* Catalog Grid */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* Course Cards */
.course-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.course-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3), 0 0 15px var(--accent-glow);
}

/* Card Header Theme Gradients */
.card-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #000000;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    opacity: 0.8;
    transition: var(--transition);
    z-index: 1;
}

.course-card:hover .card-image {
    opacity: 1;
    transform: scale(1.05);
}


/* 3D-feeling dynamic HSL grid graphics */
.intro-theme { background: linear-gradient(135deg, #000000, var(--theme-intro)); }
.pafe-theme { background: linear-gradient(135deg, #000000, var(--theme-pafe)); }
.paw-theme { background: linear-gradient(135deg, #000000, var(--theme-paw)); }
.rules-theme { background: linear-gradient(135deg, #000000, var(--theme-rules)); }

.cube-graphic {
    width: 60px;
    height: 60px;
    background-image: linear-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 15px 15px;
    transform: rotateX(60deg) rotateZ(45deg);
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

/* Card Body Content */
.card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.instructor {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 6px;
    font-weight: 400;
}

.rating-row {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 10px;
    font-size: 0.85rem;
}

.rating-num {
    font-weight: 700;
    color: var(--accent);
}

.stars {
    color: var(--accent);
    font-size: 0.8rem;
}

.rating-count {
    font-size: 0.75rem;
    color: var(--text-dim);
}

.card-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 4px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.6em;
}

.bestseller-badge {
    background-color: var(--accent-glow);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-size: 0.65rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.card-body .description {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-bottom: 15px;
    flex-grow: 1;
}

.features-list {
    list-style: none;
    margin-bottom: 30px;
}

.features-list li {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Pricing UI */
.price-row {
    margin-bottom: 25px;
}

.price-label {
    font-size: 0.85rem;
    color: var(--text-dim);
    display: block;
    margin-bottom: 2px;
}

.price-value {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--text-main);
}

.card-btn {
    width: 100%;
    text-align: center;
    background-color: var(--accent);
    color: var(--bg-dark);
    margin-bottom: 15px;
}

.card-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--accent-glow);
}

/* Accordion Syllabus UI */
.syllabus-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    padding: 10px 0;
    align-self: center;
}

.syllabus-toggle:hover {
    color: var(--accent);
}

.syllabus-drawer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-top: 0 solid var(--border);
    margin-top: 10px;
}

.syllabus-drawer.open {
    border-top-width: 1px;
    margin-top: 20px;
    padding-top: 20px;
}

.syllabus-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.syllabus-module h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
}

.syllabus-module p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Bundle Promotion Section */
.bundle-section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px 40px;
}

.bundle-card {
    position: relative;
    background-color: var(--bg-card);
    border: 2px solid var(--accent);
    border-radius: var(--radius-lg);
    padding: 50px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.bundle-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--accent-glow-strong) 0%, transparent 70%);
    bottom: -50%;
    right: -10%;
    pointer-events: none;
    filter: blur(50px);
}

.bundle-body {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
}

.bundle-left {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.bundle-right {
    flex: 1.1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.promo-badge {
    background-color: var(--accent);
    color: var(--bg-dark);
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 10px;
    letter-spacing: 0.5px;
    width: fit-content;
}

.bundle-left h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.bundle-description {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 15px;
}

/* Perks Grid (2x2) */
.bundle-perks-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 35px;
}

.perk-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.perk-icon {
    background-color: var(--accent-glow);
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 50%;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 10px var(--accent-glow);
}

.perk-svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    display: block;
}

.perk-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-main);
}

/* Purchase CTA & Price Caption */
.bundle-purchase-action {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.bundle-btn-white {
    background-color: #ffffff;
    color: #000000;
    border-radius: 50px;
    font-weight: 700;
    padding: 14px 40px;
    font-size: 1rem;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    width: fit-content;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.bundle-btn-white:hover {
    background-color: var(--accent);
    color: var(--bg-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--accent-glow-strong);
}

.bundle-price-caption {
    font-size: 0.9rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 10px;
}

.promo-price-light {
    color: #ffffff;
    font-weight: 700;
    font-size: 1.05rem;
}

.original-price-light {
    text-decoration: line-through;
    color: var(--text-dim);
}

.savings-light {
    color: var(--accent);
    font-weight: 700;
    background-color: var(--accent-glow);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid var(--accent-glow-strong);
    font-size: 0.8rem;
}

/* Collage Card Stack Layout */
.bundle-collage {
    position: relative;
    width: 100%;
    max-width: 480px;
    height: 240px;
}

.collage-card {
    position: absolute;
    width: 280px;
    aspect-ratio: 16 / 9;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    background-color: #000000;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

.collage-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Card offset placements to make a premium stacked layout */
.collage-card.card-1 {
    top: 10px;
    left: 10px;
    transform: rotate(-6deg);
    z-index: 1;
    opacity: 0.6;
}

.collage-card.card-2 {
    top: 30px;
    left: 60px;
    transform: rotate(-2deg);
    z-index: 2;
    opacity: 0.75;
}

.collage-card.card-3 {
    top: 50px;
    left: 110px;
    transform: rotate(3deg);
    z-index: 3;
    opacity: 0.9;
}

.collage-card.card-4 {
    top: 70px;
    left: 160px;
    transform: rotate(0deg);
    z-index: 4;
    opacity: 1;
    border-color: var(--accent);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 15px var(--accent-glow);
}

/* Hover effect: bring the hovered card to the front and scale it slightly */
.collage-card:hover {
    z-index: 10;
    transform: scale(1.05) rotate(0deg);
    opacity: 1;
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7), 0 0 25px var(--accent-glow);
}

/* Footer Section */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 50px 20px;
    text-align: center;
    background-color: #000000;
}

.site-footer p {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 10px;
}

.site-footer .disclaimer {
    font-size: 0.75rem;
    max-width: 600px;
    margin: 15px auto 0;
    line-height: 1.4;
}

/* Responsive Rules */
@media (max-width: 992px) {
    .bundle-body {
        flex-direction: column;
        align-items: stretch;
        gap: 40px;
    }
    .bundle-collage {
        margin: 0 auto;
        width: 100%;
        max-width: 480px;
        height: 240px;
    }
    .courses-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Collapses menu links on mobile screens */
    }
    .hero {
        padding-top: 120px;
    }
    .bundle-card {
        padding: 30px;
    }
    .bundle-perks-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .bundle-purchase-action {
        align-items: center;
        width: 100%;
    }
    .bundle-btn-white {
        width: 100%;
        max-width: 320px;
    }
    .bundle-collage {
        height: 180px;
    }
    .collage-card {
        width: 200px;
        border-radius: 8px;
    }
    .collage-card.card-1 {
        top: 10px;
        left: 10px;
    }
    .collage-card.card-2 {
        top: 25px;
        left: 40px;
    }
    .collage-card.card-3 {
        top: 40px;
        left: 70px;
    }
    .collage-card.card-4 {
        top: 55px;
        left: 100px;
    }
    .courses-grid {
        grid-template-columns: 1fr;
    }
}

/* Dedicated Course Subpages Styling */
.course-hero {
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 60px 20px 60px;
}

.course-hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: 40px;
    align-items: center;
}

.course-hero-left {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.course-hero-left h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    line-height: 1.2;
    color: var(--text-main);
}

.course-hero-left .hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-muted);
    line-height: 1.5;
}

.course-hero-left .instructor-row {
    font-size: 0.9rem;
    color: var(--text-dim);
}

.course-hero-right {
    flex: 0.8;
    display: flex;
    justify-content: center;
}

.course-hero-img {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    object-fit: cover;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
}

.course-main {
    max-width: 1200px;
    margin: 40px auto 80px;
    display: flex;
    gap: 50px;
    padding: 0 20px;
}

.course-content {
    flex: 1.4;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.content-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 30px;
}

.content-section h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--accent);
}

.perks-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.perks-list li {
    font-size: 1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
}

.curriculum-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.curriculum-item {
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
}

.curriculum-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.curriculum-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-main);
}

.curriculum-item p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.course-sidebar {
    flex: 0.8;
}

.sidebar-card {
    background-color: var(--bg-card);
    border: 2px solid var(--accent);
    border-radius: var(--radius-md);
    padding: 30px;
    position: sticky;
    top: 100px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.6), 0 0 15px var(--accent-glow);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.price-block {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.price-block .price-label {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.price-block .price-value {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--text-main);
}

.sidebar-btn {
    width: 100%;
    text-align: center;
    background-color: var(--accent);
    color: var(--bg-dark);
}

.sidebar-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--accent-glow-strong);
}

.sidebar-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.sidebar-features li {
    font-size: 0.9rem;
    color: var(--text-muted);
}

@media (max-width: 992px) {
    .course-hero-container {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    .course-main {
        flex-direction: column;
        gap: 40px;
    }
    .course-sidebar {
        width: 100%;
    }
    .sidebar-card {
        position: relative;
        top: 0;
    }
}

/* Video Player Custom Styling */
.video-container {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    background-color: #000000;
    position: relative;
}

.plyr {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
}

:root {
    --plyr-color-main: #4daeeb;
    --plyr-video-background: #000000;
}

/* ==========================================================================
   Checkout Modal & Overlay
   ========================================================================== */
.checkout-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.checkout-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.checkout-modal {
    background-color: var(--bg-card, #151922);
    border: 1px solid var(--border, #262f40);
    border-radius: var(--radius-md, 12px);
    width: 90%;
    max-width: 480px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    transition: transform 0.3s ease;
    position: relative;
    font-family: 'Roboto', sans-serif;
}

.checkout-overlay.active .checkout-modal {
    transform: translateY(0);
}

.checkout-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-muted, #8899a6);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition, all 0.3s ease);
}

.checkout-close:hover {
    color: var(--text-main, #ffffff);
}

/* Modal Typography & Header */
.checkout-header {
    margin-bottom: 25px;
    border-bottom: 1px solid var(--border, #262f40);
    padding-bottom: 15px;
}

.checkout-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main, #ffffff);
    margin-bottom: 5px;
}

.checkout-price-info {
    font-size: 1.1rem;
    color: var(--accent, #00cdff);
    font-weight: 500;
}

/* Form Styles */
.checkout-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 0.85rem;
    color: var(--text-muted, #8899a6);
    font-weight: 500;
}

.form-input {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border, #262f40);
    border-radius: var(--radius-sm, 6px);
    padding: 12px;
    color: var(--text-main, #ffffff);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition, all 0.3s ease);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent, #00cdff);
    box-shadow: 0 0 8px rgba(0, 205, 255, 0.3);
}

/* Form Inputs Grid Row */
.card-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* Buttons */
.checkout-btn {
    background-color: var(--accent, #00cdff);
    color: #000000;
    border: none;
    border-radius: var(--radius-sm, 6px);
    padding: 14px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition, all 0.3s ease);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
    font-family: inherit;
}

.checkout-btn:hover {
    background-color: #ffffff;
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
}

.checkout-btn:disabled {
    background-color: var(--border, #262f40);
    color: var(--text-muted, #8899a6);
    cursor: not-allowed;
}

/* Loading Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top: 3px solid #000000;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Success View */
.checkout-success-view {
    display: none;
    text-align: center;
    padding: 20px 0;
}

.success-icon {
    font-size: 4rem;
    color: #4caf50;
    margin-bottom: 15px;
}

/* ==========================================================================
   Course Player Page Dashboard Layout
   ========================================================================== */
.player-container {
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 30px;
}

@media (max-width: 1200px) {
    .player-container {
        grid-template-columns: 1fr;
    }
}

/* Video Wrapper */
.player-video-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.player-card {
    background-color: var(--bg-card, #151922);
    border: 1px solid var(--border, #262f40);
    border-radius: var(--radius-md, 12px);
    padding: 24px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* Header & Socials */
.player-actions-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border, #262f40);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.player-social-buttons {
    display: flex;
    gap: 15px;
}

.social-action-btn {
    background: none;
    border: none;
    color: var(--text-muted, #8899a6);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition, all 0.3s ease);
}

.social-action-btn:hover {
    color: var(--accent, #00cdff);
}

/* Author Section */
.player-author-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.author-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--accent, #00cdff);
    display: flex;
    justify-content: center;
    align-items: center;
    color: #000000;
    font-weight: 700;
}

/* Tabs Navigation */
.tabs-nav {
    display: flex;
    border-bottom: 1px solid var(--border, #262f40);
    margin-bottom: 20px;
    gap: 5px;
}

.tab-btn {
    padding: 12px 24px;
    background: none;
    border: none;
    color: var(--text-muted, #8899a6);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition, all 0.3s ease);
}

.tab-btn:hover {
    color: var(--text-main, #ffffff);
}

.tab-btn.active {
    color: var(--accent, #00cdff);
    border-bottom-color: var(--accent, #00cdff);
}

.tab-content {
    display: none;
    padding-top: 10px;
}

.tab-content.active {
    display: block;
}

/* Resource List */
.resource-list-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .resource-list-grid {
        grid-template-columns: 1fr;
    }
}

.resource-card {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border, #262f40);
    border-radius: var(--radius-sm, 6px);
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition, all 0.3s ease);
}

.resource-card:hover {
    border-color: var(--accent, #00cdff);
    background-color: rgba(255, 255, 255, 0.04);
}

.resource-icon-box {
    width: 42px;
    height: 42px;
    border-radius: 6px;
    background-color: rgba(0, 205, 255, 0.1);
    color: var(--accent, #00cdff);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
}

.resource-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.resource-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main, #ffffff);
    text-decoration: none;
}

.resource-size {
    font-size: 0.75rem;
    color: var(--text-muted, #8899a6);
}

.resource-lock-icon {
    color: #ffb703;
    font-size: 1rem;
}

/* Playlist Sidebar */
.player-sidebar {
    background-color: var(--bg-card, #151922);
    border: 1px solid var(--border, #262f40);
    border-radius: var(--radius-md, 12px);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: fit-content;
    position: sticky;
    top: 40px;
}

.playlist-header {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main, #ffffff);
    border-bottom: 1px solid var(--border, #262f40);
    padding-bottom: 12px;
}

.playlist-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.playlist-item {
    padding: 12px 15px;
    border-radius: var(--radius-sm, 6px);
    border: 1px solid transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition, all 0.3s ease);
}

.playlist-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

.playlist-item.active {
    background-color: rgba(0, 205, 255, 0.08);
    border-color: var(--accent, #00cdff);
}

.playlist-num {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted, #8899a6);
    background-color: rgba(255, 255, 255, 0.05);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.playlist-item.active .playlist-num {
    background-color: var(--accent, #00cdff);
    color: #000000;
}

.playlist-details {
    flex: 1;
}

.playlist-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main, #ffffff);
}

.playlist-duration {
    font-size: 0.75rem;
    color: var(--text-muted, #8899a6);
}

.playlist-status-icon {
    font-size: 0.75rem;
    font-weight: 700;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
    user-select: none;
    transition: var(--transition, all 0.3s ease);
}

.playlist-status-icon.watched {
    background-color: #4caf50;
    color: #ffffff;
    cursor: pointer;
}

.playlist-status-icon.active {
    background-color: var(--accent, #00cdff);
    color: #000000;
}

.playlist-status-icon.unplayed {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-muted, #8899a6);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.playlist-item.active .playlist-status-icon.unplayed {
    background-color: var(--accent, #00cdff);
    color: #000000;
    border-color: var(--accent, #00cdff);
}

.playlist-module-badges {
    display: flex;
    gap: 8px;
    padding: 5px 10px 10px 10px;
}

.badge {
    display: inline-block;
    font-size: 0.65rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}

.badge.free-badge {
    background-color: rgba(76, 175, 80, 0.15);
    color: #4caf50;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.badge.premium-badge {
    background-color: rgba(0, 205, 255, 0.15);
    color: var(--accent, #00cdff);
    border: 1px solid rgba(0, 205, 255, 0.3);
}

.badge.level-badge.beginner {
    background-color: rgba(76, 175, 80, 0.15);
    color: #4caf50;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.badge.level-badge.intermediate {
    background-color: rgba(255, 183, 3, 0.15);
    color: #ffb703;
    border: 1px solid rgba(255, 183, 3, 0.3);
}

.badge.level-badge.advanced {
    background-color: rgba(244, 67, 54, 0.15);
    color: #f44336;
    border: 1px solid rgba(244, 67, 54, 0.3);
}