:root {
    /* Color Palette */
    --bg-primary: #050508;
    --bg-secondary: #0d0d14;
    --bg-card: rgba(15, 15, 25, 0.85);
    --purple-dark: #1a0a2e;
    --purple-mid: #4a1c6b;
    --purple-light: #7b2cbf;
    --purple-accent: #9d4edd;
    --purple-glow: #c77dff;
    --cloud-purple: #f3e8ff;
    --text-primary: var(--cloud-purple);
    --text-secondary: #d8c6eb;
    --text-muted: #8e7aa3;
    --border-color: rgba(157, 78, 221, 0.25);
    --glass-bg: rgba(10, 10, 20, 0.65);
    --error-red: #ff4757;

    /* Typography */
    --font-main: 'Inter', sans-serif;
    --font-display: 'Inter', sans-serif;
    /* Premium headers */
    --font-mono: 'JetBrains Mono', monospace;
    --font-elegant: 'Inter', sans-serif;
    --font-hero: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    scrollbar-width: thin;
    scrollbar-color: var(--purple-mid) var(--bg-secondary);
}

body {
    font-family: var(--font-main);
    line-height: 1.8;
    overflow-x: hidden;
    min-height: 100vh;
    letter-spacing: 0.02em;
    overscroll-behavior-y: none;
    /* Fix Mac white screen on bounce */
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Reveal Animations */
.reveal-on-scroll,
.glass-card,
.experience-card,
.semester-box {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    pointer-events: none;
}

/* Alternating Side-pop for projects */
.project-card.from-left {
    opacity: 0;
    transform: translateX(-80px);
    /* From left */
    transition: all 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-card.from-right {
    opacity: 0;
    transform: translateX(80px);
    /* From right */
    transition: all 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-card.revealed {
    opacity: 1;
    transform: translateX(0);
}

.revealed {
    opacity: 1;
    transform: translateY(0);
    pointer-events: all;
}

.experience-card:nth-child(2) {
    transition-delay: 0.1s;
}

.experience-card:nth-child(3) {
    transition-delay: 0.2s;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--purple-mid), var(--purple-dark));
    border-radius: 5px;
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--purple-light), var(--purple-mid));
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-hero);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-family: var(--font-hero);
    font-weight: 600;
}

h3 {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    font-family: var(--font-hero);
    font-weight: 600;
}

p {
    font-family: var(--font-main);
    font-weight: 400;
}

a {
    color: var(--purple-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--purple-glow);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    font-family: var(--font-elegant);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--purple-mid), var(--purple-light));
    color: var(--text-primary);
    box-shadow: 0 4px 25px rgba(123, 44, 191, 0.5);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(123, 44, 191, 0.7);
    color: var(--text-primary);
}

.btn-secondary {
    background: rgba(26, 10, 46, 0.6);
    color: var(--text-primary);
    border: 1px solid var(--purple-mid);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--purple-mid);
    border-color: var(--purple-light);
    transform: translateY(-4px) scale(1.02);
    color: #fff;
    box-shadow: 0 8px 30px rgba(123, 44, 191, 0.3);
}

.btn-solid {
    background: var(--purple-mid);
    color: var(--text-primary);
    box-shadow: 0 4px 15px rgba(74, 28, 107, 0.4);
    border: 2px solid var(--purple-mid);
}

.btn-solid:hover {
    background: var(--purple-light);
    border-color: var(--purple-light);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(123, 44, 191, 0.5);
    color: var(--text-primary);
}

.btn-icon {
    width: 56px;
    height: 56px;
    padding: 0;
    border-radius: 50%;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(15px);
}

.btn-icon:hover {
    background: var(--purple-mid);
    border-color: var(--purple-accent);
    transform: translateY(-4px) scale(1.15);
    box-shadow: 0 8px 30px rgba(157, 78, 221, 0.4);
}

.btn-icon svg {
    width: 24px;
    height: 24px;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    backdrop-filter: blur(20px);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    z-index: 1;
}

.glass-card:hover {
    border-color: var(--purple-accent);
    box-shadow: 0 20px 60px rgba(157, 78, 221, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
    transform: translateY(-10px);
}

/*  LANDING PAGE  */

.landing-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at center, #0d0518 0%, #050508 50%, #020204 100%);
}

/* Black Hole Canvas */
#blackhole-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Transition Overlay */
/* Smooth Page Fade */
.transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.transition-overlay.active {
    opacity: 1;
    pointer-events: all;
}

/* Floating Blocks (replacing stars) */
.stars-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-block {
    position: absolute;
    background: rgba(157, 78, 221, 0.15);
    width: 10px;
    height: 10px;
    animation: floatBlock linear infinite;
    backdrop-filter: blur(2px);
    border: 1px solid rgba(157, 78, 221, 0.1);
}

@keyframes floatBlock {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
    }

    20% {
        opacity: 0.3;
    }

    80% {
        opacity: 0.3;
    }

    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Hero Section */
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Hero Content */
.hero-content {
    max-width: 900px;
    margin-top: 5rem;
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    border-radius: 24px;
    position: relative;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    filter: blur(20px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), filter 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hero-content h1,
.hero-content p {
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.9), 0 0 40px rgba(0, 0, 0, 0.7);
    /* Strong shadow for legibility */
    pointer-events: auto;
}

.hero-buttons {
    pointer-events: auto;
}

/* Page Title Section */
.page-title-section {
    text-align: center;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

.page-title-section h1 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    /* Professional font */
    font-size: 5rem;
    /* Bigger */
    color: var(--purple-glow);
    text-shadow: 0 4px 15px rgba(157, 78, 221, 0.5);
    transform: none;
}

.hero h1 {
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-hero);
    background: linear-gradient(135deg, var(--purple-accent) 0%, var(--purple-glow) 50%, var(--purple-light) 100%);
    /* Persistent purple */
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(157, 78, 221, 0.4);
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.typing-container {
    min-height: 2rem;
    margin-bottom: var(--spacing-md);
}

.typing-text {
    font-size: 1.15rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--purple-accent);
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: text-bottom;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

    51%,
    100% {
        opacity: 0;
    }
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-md);
}

/* Footer Links */
.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
    position: relative;
    z-index: 1;
    opacity: 0;
    /* Hidden initially */
    transition: opacity 2s ease;
}

.footer-link {
    color: var(--text-secondary);
    font-family: var(--font-elegant);
    font-size: 1rem;
    font-weight: 700;
    /* Bolding */
    position: relative;
    padding-bottom: 4px;
    letter-spacing: 0.03em;
}

.footer-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--purple-light), var(--purple-glow));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.footer-link:hover::after {
    transform: scaleX(1);
}

.footer-link:hover {
    color: var(--text-primary);
}

/* ============= ABOUT PAGE ============= */

.about-page {
    background: linear-gradient(180deg, #0a0514 0%, var(--bg-primary) 30%, var(--bg-secondary) 70%, #0a0514 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.about-page::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(123, 44, 191, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(157, 78, 221, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(74, 28, 107, 0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    animation: ambientShift 20s ease-in-out infinite;
}

@keyframes ambientShift {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

.page-header {
    padding: 1.5rem 0;
    text-align: center;
    background: rgba(5, 5, 8, 0.8);
    backdrop-filter: blur(15px);
    position: relative;
    z-index: 100;
    border-bottom: 1px solid rgba(157, 78, 221, 0.15);
}

.back-link {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%) !important;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    transition: color 0.3s ease;
    z-index: 10;
    will-change: transform;
    /* Hint to browser to handle this separately */
}

.back-link:hover {
    color: var(--primary-light);
    transform: translateY(-50%) !important;
    /* Force stay */
}

.back-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--purple-accent);
    transition: width 0.3s ease;
}

.back-link:hover::after {
    width: 100%;
}

.back-link:hover {
    color: var(--primary-light);
    transform: translateY(-50%);
}

.page-header.sticky-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(5, 5, 8, 0.7);
    backdrop-filter: blur(12px);
    /* blurred background */
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(157, 78, 221, 0.1);
    transition: all 0.3s ease;
}

.sticky-header {
    position: sticky;
    top: 0;
}

.transparent-header {
    background: transparent;
    backdrop-filter: none;
    border-bottom: none;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    /* Center the nav mainly */
    position: relative;
    padding: 0.5rem 0;
}

.header-spacer {
    display: none;
}

.header-top {
    display: none;
}

.nav-buttons {
    display: flex;
    justify-content: center;
    gap: 6rem;
    align-items: center;
    margin: 0;
    position: relative;
    z-index: 20;
}

.nav-header {
    font-family: var(--font-elegant);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 0;
    padding: 1rem 1.5rem;
    /* Increase click area */
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 0 0 10px rgba(157, 78, 221, 0.1);
}

.nav-header:hover {
    color: var(--text-primary);
    transform: translateY(-1px);
    text-shadow: 0 0 15px rgba(157, 78, 221, 0.4);
}

.nav-header::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--purple-accent);
    transition: width 0.3s ease;
    transform: translateX(-50%);
}

.nav-header:hover::after {
    width: 80%;
}

/* About Section */
.about-section {
    padding: var(--spacing-md) 0 var(--spacing-xl) 0;
    position: relative;
    z-index: 1;
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.profile-image-container {
    position: relative;
}

.profile-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 24px;
    border: 3px solid transparent;
    background: linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
        linear-gradient(135deg, var(--purple-light), var(--purple-glow), var(--purple-accent)) border-box;
    box-shadow: 0 25px 80px rgba(123, 44, 191, 0.35);
    transition: all var(--transition-normal);
}

.profile-image:hover {
    transform: scale(1.02);
    box-shadow: 0 30px 100px rgba(123, 44, 191, 0.45);
}

.about-text {
    font-size: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-family: var(--font-main);
    font-weight: 400;
    max-width: 900px;
}

.about-text p {
    margin-bottom: var(--spacing-md);
}

/* Experience Section */
.experience-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, transparent, rgba(15, 10, 25, 0.5), transparent);
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    font-size: 5.5rem;
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--cloud-purple);
}

.section-title::after {
    display: none;
    /* cleaner */
}

.experience-grid {
    display: grid;
    gap: var(--spacing-md);
}

.experience-card {
    padding: var(--spacing-md);
}

.experience-card h3 {
    color: var(--purple-glow);
    margin-bottom: 0.5rem;
}

.experience-meta {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.9rem;
    font-family: var(--font-elegant);
}

.experience-card ul {
    list-style: none;
    padding-left: 0;
}

.experience-card li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-family: var(--font-main);
}

.experience-card li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--purple-accent);
}

/* Projects Section */
.projects-section {
    padding: var(--spacing-xl) 0;
    position: relative;
    z-index: 1;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    padding: var(--spacing-md);
    cursor: pointer;
    text-decoration: none;
    display: block;
}

.project-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    transition: color var(--transition-fast);
}

.project-card:hover h3 {
    color: var(--purple-glow);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
}

.tech-tag {
    padding: 0.3rem 0.85rem;
    background: rgba(74, 28, 107, 0.3);
    border-radius: 20px;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--purple-glow);
    border: 1px solid var(--purple-mid);
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-family: var(--font-main);
}

.project-date {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: var(--font-elegant);
    margin-top: var(--spacing-sm);
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, transparent 0%, #0d0518 100%);
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero {
    position: relative;
    z-index: var(--z-content);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 var(--spacing-md);
    padding-bottom: 10vh;
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* Error Toast */
.error-toast {
    position: fixed;
    top: 120px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: linear-gradient(135deg, var(--error-red), #cc3644);
    color: white;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-family: var(--font-elegant);
    font-weight: 600;
    z-index: 9999;
    opacity: 0;
    transition: all var(--transition-normal);
    box-shadow: 0 8px 30px rgba(255, 71, 87, 0.5);
}

.error-toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* NOTES PAGE */

.notes-page {
    min-height: 100vh;
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(180deg, #0a0514 0%, var(--bg-primary) 20%, var(--bg-secondary) 80%, #0a0514 100%);
    position: relative;
}

.notes-page::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 30% 30%, rgba(123, 44, 191, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 70%, rgba(157, 78, 221, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: ambientShift 25s ease-in-out infinite;
}

.notes-container {
    padding: var(--spacing-lg) 0;
    position: relative;
    z-index: 1;
}

.semester-section {
    margin-bottom: var(--spacing-md);
}

.semester-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--purple-mid) 0%, var(--purple-dark) 100%);
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.semester-header:hover {
    background: linear-gradient(135deg, var(--purple-light), var(--purple-mid));
    box-shadow: 0 8px 30px rgba(123, 44, 191, 0.4);
    transform: none;
}

.semester-icon {
    font-size: 1.5rem;
    transition: transform var(--transition-normal);
}

.semester-header.open .semester-icon {
    transform: rotate(90deg);
}

.semester-title {
    font-size: 1.35rem;
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.semester-content {
    display: none;
    padding: var(--spacing-sm) 0 var(--spacing-sm) var(--spacing-md);
    animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.semester-content.open {
    display: block;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-15px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.course-item {
    margin-bottom: var(--spacing-sm);
}

.course-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem var(--spacing-sm);
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.course-header:hover {
    background: var(--bg-card);
    border-color: var(--purple-accent);
    transform: none;
}

.course-header.open {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom-color: transparent;
}

.course-icon {
    color: var(--purple-accent);
    transition: transform var(--transition-normal);
}

.course-header.open .course-icon {
    transform: rotate(90deg);
}

.course-name {
    font-family: var(--font-elegant);
    font-weight: 500;
    font-size: 1.05rem;
    letter-spacing: 0.01em;
}

.course-files {
    display: none;
    padding: var(--spacing-sm);
    background: rgba(13, 13, 20, 0.8);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 12px 12px;
}

.course-files.open {
    display: block;
}

.course-files p {
    font-family: var(--font-main);
}

.file-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.file-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-family: var(--font-elegant);
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.file-link:hover {
    background: var(--purple-mid);
    border-color: var(--purple-accent);
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(123, 44, 191, 0.3);
}

.file-link svg {
    width: 16px;
    height: 16px;
}

.coming-soon {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--text-muted);
    font-family: var(--font-elegant);
    font-style: italic;
}

/* Back Link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    font-family: var(--font-elegant);
    transition: all var(--transition-fast);
}

.back-link:hover {
    color: var(--purple-accent);
    transform: translateX(-5px);
}

/* RESPONSIVE */

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-image-container {
        max-width: 250px;
        margin: 0 auto;
    }

    .footer-links {
        gap: var(--spacing-md);
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .contact-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-content {
        padding: var(--spacing-md);
    }
}

/* Stars Animation */
.floating-star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: floatStar linear infinite;
    opacity: 0;
}

@keyframes floatStar {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translateY(-100vh) scale(1);
    }
}