/* ═══════════════════════════════════════════════════════════════
   COURSE PAGES MAJESTIC UI (Transparent & Scroll Linked)
   ═══════════════════════════════════════════════════════════════ */

/* Theme Variables */
:root {
    --course-canvas-bg: #f8fafc;
    --course-text-main: #0f172a;
    --course-text-sub: #475569;
    --course-glass-bg: rgba(255, 255, 255, 0.7);
    --course-glass-border: rgba(0, 0, 0, 0.05);
    --course-accent: #4361ee;
    --course-glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
    --course-panel-border: rgba(67, 97, 238, 0.3);
}

/* Override Native Smooth Scrolling to Fix GSAP Jitter */
html:has(.page-course) {
    scroll-behavior: auto !important;
}

body.game-mode {
    --course-canvas-bg: #00020a;
    --course-text-main: #ffffff;
    --course-text-sub: rgba(255, 255, 255, 0.8);
    --course-glass-bg: rgba(10, 15, 30, 0.4);
    --course-glass-border: rgba(0, 255, 204, 0.15);
    --course-accent: #00ffcc;
    --course-glass-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    --course-panel-border: linear-gradient(90deg, transparent, rgba(0, 255, 204, 0.5), transparent);
}

/* Full-Screen Canvas Background */
.majestic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    z-index: -1;
    pointer-events: none;
    background: var(--course-canvas-bg);
    transition: background 0.5s ease;
    /* Force GPU compositing layer — prevents iOS fixed-element scroll jitter */
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* Ensure body does not cover the canvas */
.page-course,
.page-course main,
.page-course section {
    background: transparent !important;
}

/* Main content wrapper transparent */
.transparent-ui {
    position: relative;
    z-index: 1;
    pointer-events: auto;
    background: transparent !important;
}

/* Common Panel Setup */
.majestic-panel {
    min-height: 100vh;
    padding: 120px var(--spacing-container, 5vw) 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    /* Explicitly transparent to let canvas shine through */
    background: transparent !important;
}

.course-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    /* clip-path portal reveal requires visible overflow on parent */
    overflow: visible;
}

/* GSAP-animated elements: declare will-change upfront so
   compositor thread claims the layer before animation starts */
#phase-2 .course-container,
#phase-3 .glass-module-card,
#phase-4 .faculty-side,
#phase-4 .testimonial-side,
#phase-5 .course-container,
#phase-5 .course-cta-box {
    will-change: transform, opacity;
}

/* Faculty split children need their own stacking context for rotationY */
.faculty-side,
.testimonial-side {
    transform-style: preserve-3d;
    backface-visibility: hidden;
}

/* Typography & Tags */
.course-tag {
    font-family: var(--font-head);
    font-size: 0.6rem;
    letter-spacing: 0.25em;
    color: var(--course-accent);
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
    text-shadow: 0 0 10px rgba(var(--accent-primary-rgb), 0.4);
}

.course-title {
    font-family: var(--font-head);
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 900;
    color: var(--course-text-main);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

body.game-mode .course-title {
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8), 0 0 40px rgba(0, 255, 204, 0.2);
}

.course-sub {
    font-family: var(--font-body);
    font-size: clamp(1.1rem, 1.5vw, 1.3rem);
    color: var(--course-text-sub);
    max-width: 600px;
    line-height: 1.6;
    margin-bottom: 3rem;
}

body.game-mode .course-sub {
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

.course-section-heading {
    font-family: var(--font-head);
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--course-text-main);
    margin-bottom: 3rem;
}

body.game-mode .course-section-heading {
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.6);
}

/* Glassmorphic Panels */
.glass-panel,
.glass-module-card,
.faculty-glass-card,
.testimonial-glass-card {
    background: var(--course-glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--course-glass-border);
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--course-glass-shadow);
    position: relative;
    overflow: hidden;
    transition: all 0.5s ease;
}

body.game-mode .glass-panel::before,
body.game-mode .glass-module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--course-panel-border);
}

/* Scrollytelling Base Prep */
/* Sections sit visually fixed or translate normally, GSAP handles the logic */
.scrolly-element {
    opacity: 0;
    /* Intial state for GSAP */
}

/* Phase 1: Hero UI */
.course-hero-inner {
    max-width: 800px;
    z-index: 2;
}

.course-hud-stats {
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 3rem;
    padding: 20px 30px;
    background: var(--course-glass-bg);
    border-radius: 8px;
    border-left: 2px solid var(--course-accent);
    backdrop-filter: blur(4px);
    display: inline-flex;
}

.hud-stat-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hud-stat-lbl {
    font-family: var(--font-head);
    font-size: 0.55rem;
    letter-spacing: 0.2em;
    color: var(--course-text-sub);
}

.hud-stat-val {
    font-family: var(--font-head);
    font-size: 1.2rem;
    color: var(--course-accent);
    font-weight: 700;
}

.hud-stat-div {
    width: 1px;
    height: 30px;
    background: var(--course-glass-border);
}

.course-hero-actions {
    display: flex;
    gap: 20px;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0.6;
}

.hero-scroll-indicator span {
    font-family: var(--font-head);
    font-size: 0.5rem;
    letter-spacing: 0.3em;
    color: #fff;
}

.hero-scroll-indicator .scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, #00ffcc, transparent);
    animation: scrollLineDrop 2s infinite;
}

@keyframes scrollLineDrop {
    0% {
        transform: scaleY(0);
        transform-origin: top;
        opacity: 1;
    }

    50% {
        transform: scaleY(1);
        transform-origin: top;
        opacity: 1;
    }

    50.1% {
        transform: scaleY(1);
        transform-origin: bottom;
        opacity: 1;
    }

    100% {
        transform: scaleY(0);
        transform-origin: bottom;
        opacity: 0;
    }
}

/* Phase 2: Overview UI */
.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.overview-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--course-text-sub);
    margin-bottom: 1.5rem;
}

body.game-mode .overview-text p {
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.8);
}

.overview-highlights ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.overview-highlights li {
    font-size: 1rem;
    color: var(--course-text-main);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 1rem;
    background: var(--course-glass-bg);
    border: 1px solid var(--course-glass-border);
    border-radius: 6px;
}

.highlight-check {
    color: var(--course-accent);
    font-weight: bold;
}

/* Phase 3: Curriculum UI */
.curriculum-modules {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.module-hdr {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
}

.module-num {
    font-family: var(--font-head);
    font-size: 1.5rem;
    color: var(--course-accent);
    opacity: 0.3;
    font-weight: 900;
}

.module-hdr h3 {
    font-family: var(--font-head);
    font-size: 1.1rem;
    color: var(--course-text-main);
    margin: 0;
}

.module-list {
    list-style: none;
}

.module-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 0.95rem;
    color: var(--course-text-sub);
}

.module-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--course-accent);
    font-weight: bold;
}

/* Phase 4: Faculty & Testimonials UI */
.faculty-testimonials-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.faculty-info h3 {
    font-family: var(--font-head);
    font-size: 1.5rem;
    color: var(--course-text-main);
    margin-bottom: 1rem;
}

.faculty-info p {
    color: var(--course-text-sub);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.btn-ghost-neon {
    font-family: var(--font-head);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--course-accent);
    text-decoration: none;
    border: 1px solid var(--course-glass-border);
    padding: 10px 20px;
    border-radius: 4px;
    transition: all 0.3s;
    display: inline-block;
}

.btn-ghost-neon:hover {
    background: var(--course-glass-border);
}

.testimonial-glass-card blockquote {
    font-size: 1rem;
    font-style: italic;
    color: var(--course-text-main);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    border-left: 3px solid var(--course-accent);
    padding-left: 15px;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: bold;
    color: var(--course-accent);
}

.author-role {
    font-size: 0.8rem;
    color: var(--course-text-sub);
}

.mt-4 {
    margin-top: 1.5rem;
}

/* Phase 5: CTA UI */
.final-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 4rem;
}

.panel-heading {
    font-family: var(--font-head);
    font-size: 1.2rem;
    color: var(--course-text-main);
    margin-bottom: 1.5rem;
}

.batch-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--course-glass-bg);
    border-radius: 4px;
    margin-bottom: 10px;
    border: 1px solid var(--course-glass-border);
}

.batch-date {
    font-family: var(--font-head);
    font-size: 0.9rem;
    color: var(--course-text-main);
}

.batch-status {
    font-family: var(--font-head);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    padding: 4px 8px;
    border-radius: 2px;
}

.batch-status.open {
    background: transparent;
    color: var(--course-accent);
    border: 1px solid var(--course-accent);
}

.batch-status.soon {
    background: transparent;
    color: var(--course-text-sub);
    border: 1px solid var(--course-text-sub);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.cyber-tag {
    font-family: var(--font-head);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    padding: 8px 12px;
    background: var(--course-glass-bg);
    border: 1px solid var(--course-glass-border);
    color: var(--course-text-sub);
    border-radius: 4px;
}

.course-cta-box {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--course-glass-bg);
    border: 1px solid var(--course-glass-border);
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.course-cta-box h2 {
    font-family: var(--font-head);
    font-size: 2.5rem;
    color: var(--course-text-main);
    margin-bottom: 1rem;
}

.course-cta-box p {
    color: var(--course-text-sub);
    margin-bottom: 2rem;
}

.btn-xxl {
    font-size: 1.1rem;
    padding: 18px 40px;
    letter-spacing: 0.15em;
}

.pulse-fx {
    box-shadow: 0 0 0 0 rgba(0, 255, 204, 0.7);
    animation: pulseGlow 2s infinite cubic-bezier(0.66, 0, 0, 1);
}

@keyframes pulseGlow {
    to {
        box-shadow: 0 0 0 20px rgba(0, 255, 204, 0);
    }
}

/* ═══════════════════════════════════════════════════════════════
   HERO ENTRANCE — CSS keyframes, no JS required
   Uses specific selectors so non-hero sections aren't affected.
   ═══════════════════════════════════════════════════════════════ */

@keyframes heroReveal {
    from {
        opacity: 0;
        transform: perspective(1200px) rotateX(14deg) translateY(32px);
    }

    to {
        opacity: 1;
        transform: perspective(1200px) rotateX(0deg) translateY(0px);
    }
}

.course-hero-section .course-tag {
    animation: heroReveal 0.9s 0.15s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.course-hero-section .course-title {
    animation: heroReveal 1s 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.course-hero-section .course-sub {
    animation: heroReveal 0.9s 0.45s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.course-hero-section .course-hud-stats {
    animation: heroReveal 0.9s 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.course-hero-section .course-hero-actions {
    animation: heroReveal 0.9s 0.75s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ═══════════════════════════════════════════════════════════════
   3D CONTENT REVEAL — IntersectionObserver adds .in-view
   All transitions use opacity + transform (GPU composited layer).
   will-change declares intent to compositor thread upfront.
   ═══════════════════════════════════════════════════════════════ */

/* Single element — full 3D tilt-rise */
.reveal-3d {
    opacity: 0;
    transform: perspective(1000px) rotateX(22deg) translateY(42px) scale(0.97);
    transition:
        opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

.reveal-3d.in-view {
    opacity: 1;
    transform: perspective(1000px) rotateX(0deg) translateY(0px) scale(1);
}

/* Simple fade-up — tags and body text */
.reveal-fade {
    opacity: 0;
    transform: translateY(22px);
    transition:
        opacity 0.7s ease,
        transform 0.7s ease;
    will-change: transform, opacity;
}

.reveal-fade.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered grid/card reveals — add class to the CONTAINER;
   every direct child gets the tilt-rise with a cascading delay  */
.reveal-stagger>* {
    opacity: 0;
    transform: perspective(900px) rotateX(18deg) translateY(36px) scale(0.97);
    transition:
        opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

.reveal-stagger>*:nth-child(1) {
    transition-delay: 0.05s;
}

.reveal-stagger>*:nth-child(2) {
    transition-delay: 0.17s;
}

.reveal-stagger>*:nth-child(3) {
    transition-delay: 0.29s;
}

.reveal-stagger>*:nth-child(4) {
    transition-delay: 0.41s;
}

.reveal-stagger>*.in-view {
    opacity: 1;
    transform: perspective(900px) rotateX(0deg) translateY(0px) scale(1);
}

/* Honour reduced-motion system preference */
@media (prefers-reduced-motion: reduce) {

    .reveal-3d,
    .reveal-fade,
    .reveal-stagger>*,
    .course-hero-section .course-tag,
    .course-hero-section .course-title,
    .course-hero-section .course-sub,
    .course-hero-section .course-hud-stats,
    .course-hero-section .course-hero-actions {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
        animation: none !important;
    }
}

/* Responsive */
@media (max-width: 900px) {

    .overview-grid,
    .faculty-testimonials-split,
    .final-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .majestic-panel {
        padding: 60px 16px 40px !important;
    }

    .glass-panel,
    .glass-module-card,
    .faculty-glass-card,
    .testimonial-glass-card {
        padding: 1.5rem !important;
    }

    .course-title {
        font-size: clamp(2.0rem, 8vw, 3.2rem) !important;
    }

    .course-hud-stats {
        width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 12px !important;
        padding: 16px 20px !important;
        border-left: none !important;
        border-top: 2px solid var(--course-accent) !important;
        text-align: center !important;
    }

    .hud-stat-item {
        align-items: center !important;
        width: 100% !important;
    }

    .hud-stat-div {
        width: 80% !important;
        height: 1px !important;
        background: rgba(255, 255, 255, 0.1) !important;
        margin: 4px 0 !important;
    }

    body.game-mode .hud-stat-div {
        background: rgba(0, 231, 194, 0.15) !important;
    }

    .course-hero-actions {
        flex-direction: column !important;
        width: 100% !important;
        gap: 12px !important;
    }

    .course-hero-actions .btn {
        width: 100% !important;
        justify-content: center !important;
    }

    .curriculum-modules {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
}

@media (max-width: 600px) {
    .tags-list {
        justify-content: center;
    }

    .course-cta-box {
        padding: 2rem 1.5rem;
    }

    .btn-xxl {
        font-size: 1rem;
        padding: 14px 24px;
        letter-spacing: 0.1em;
    }
}