/* ========================================
   ADVANCED PORTFOLIO STYLES
   ======================================== */

/* Reset and Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b3b3b3;
    --color-accent: #0066ff;
    --color-accent-dark: #0052cc;
    --color-accent-light: #3385ff;
    --color-gradient-start: #0066ff;
    --color-gradient-end: #00d4ff;
    
    /* Typography */
    --font-primary: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --section-padding: 8rem;
    --container-max-width: 1400px;
    
    /* Transitions */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ========================================
   ANIMATED BACKGROUND
   ======================================== */
.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(ellipse at top, #0a0a0a 0%, #000000 100%);
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    top: -10%;
    right: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(225deg, #00d4ff, #0066ff);
    bottom: -5%;
    left: -5%;
    animation-delay: 5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(315deg, #0066ff, #6600ff);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -50px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.3s var(--transition-smooth);
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar.scrolled {
    padding: 1rem 0;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 3rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.nav-menu {
    display: flex;
    gap: 3rem;
    list-style: none;
    align-items: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: var(--font-weight-medium);
    transition: color 0.3s var(--transition-smooth);
    position: relative;
}

.nav-number {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
    transition: width 0.3s var(--transition-smooth);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all 0.3s var(--transition-smooth);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 3rem 4rem;
    position: relative;
}

.hero-content {
    max-width: var(--container-max-width);
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 6rem;
    align-items: center;
}

.hero-left {
    z-index: 2;
}

.glitch-wrapper {
    margin-bottom: 1rem;
}

.hero-name {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

/* Typing Effect */
.typing-wrapper {
    height: 3rem;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--color-accent);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.typing-text {
    display: inline-block;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--color-accent);
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 3rem;
    max-width: 600px;
}

.hero-cta-group {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s var(--transition-smooth);
    position: relative;
    overflow: hidden;
    font-family: var(--font-primary);
}

.cta-primary {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: var(--color-text-primary);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
}

.cta-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 102, 255, 0.5);
}

.cta-primary:hover::before {
    left: 100%;
}

.cta-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.cta-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

/* Social Links */
.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.3s var(--transition-smooth);
}

.social-link:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

/* Hero Image */
.hero-right {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 450px;
    aspect-ratio: 1;
}

.image-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-accent);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: morph 8s ease-in-out infinite;
    z-index: -1;
}

@keyframes morph {
    0%, 100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
    50% {
        border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
    }
}

.hero-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 102, 255, 0.3);
    transition: transform 0.3s var(--transition-smooth);
}

.hero-image-wrapper:hover img {
    transform: scale(1.02);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 2px;
    height: 50px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scroll-down 2s infinite;
}

@keyframes scroll-down {
    0%, 100% {
        opacity: 0;
        transform: translateY(-20px);
    }
    50% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
    padding: var(--section-padding) 3rem;
    position: relative;
}

.section-alt {
    background: var(--color-bg-secondary);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 4rem;
}

.section-number {
    font-size: 5rem;
    font-weight: var(--font-weight-bold);
    color: transparent;
    -webkit-text-stroke: 2px rgba(0, 102, 255, 0.2);
    line-height: 1;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Scroll Animations */
.section .container {
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section.animate-left .container {
    transform: translateX(-50px);
}

.section.animate-right .container {
    transform: translateX(50px);
}

.section.visible .container {
    opacity: 1;
    transform: translateX(0);
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-content {
    max-width: 1000px;
}

.lead-text {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: var(--font-weight-medium);
    line-height: 1.4;
    color: var(--color-text-primary);
    margin-bottom: 2rem;
}

.section-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    transition: all 0.3s var(--transition-smooth);
}

.stat-item:hover {
    background: rgba(0, 102, 255, 0.05);
    border-color: rgba(0, 102, 255, 0.2);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-number::after {
    content: '+';
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================================
   SKILLS SECTION
   ======================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.skill-card {
    padding: 3rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    overflow: hidden;
    transition: all 0.4s var(--transition-smooth);
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top left, rgba(0, 102, 255, 0.1), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s;
}

.skill-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 102, 255, 0.2);
}

.skill-card:hover::before {
    opacity: 1;
}

.skill-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 255, 0.1));
    border-radius: 16px;
    margin-bottom: 2rem;
    color: var(--color-accent);
    transition: all 0.3s var(--transition-smooth);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 212, 255, 0.2));
}

.skill-card h3 {
    font-size: 1.8rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.skill-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.skill-arrow {
    font-size: 1.5rem;
    color: var(--color-accent);
    transition: transform 0.3s var(--transition-smooth);
    display: inline-block;
}

.skill-card:hover .skill-arrow {
    transform: translateX(10px);
}

/* ========================================
   WORK SECTION
   ======================================== */
.work-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 3rem;
}

.work-item {
    text-decoration: none;
    color: inherit;
    display: block;
    border-radius: 24px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.4s var(--transition-smooth);
}

.work-item:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 20px 50px rgba(0, 102, 255, 0.2);
}

.work-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
}

.work-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--transition-smooth);
}

.work-item:hover .work-image img {
    transform: scale(1.1);
}

.work-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.9), rgba(0, 212, 255, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s var(--transition-smooth);
}

.work-item:hover .work-overlay {
    opacity: 1;
}

.view-project {
    color: var(--color-text-primary);
    font-size: 1.2rem;
    font-weight: var(--font-weight-semibold);
}

.work-info {
    padding: 2rem;
}

.work-tags {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tag {
    padding: 0.4rem 1rem;
    background: rgba(0, 102, 255, 0.1);
    color: var(--color-accent);
    border: 1px solid rgba(0, 102, 255, 0.2);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
}

.work-info h3 {
    font-size: 1.6rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.work-info p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.contact-lead {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: 4rem;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.contact-card {
    padding: 3rem 2rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    transition: all 0.4s var(--transition-smooth);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(0, 102, 255, 0.3);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 102, 255, 0.2);
}

.contact-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.1), rgba(0, 212, 255, 0.1));
    border-radius: 50%;
    color: var(--color-accent);
    transition: all 0.3s var(--transition-smooth);
}

.contact-card:hover .contact-icon {
    transform: scale(1.1);
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.2), rgba(0, 212, 255, 0.2));
}

.contact-text {
    text-align: center;
}

.contact-text h3 {
    font-size: 1.3rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

.contact-text p {
    font-size: 1rem;
    color: var(--color-accent);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-bg-primary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 4rem 3rem 2rem;
}

.footer-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    align-items: center;
}

.footer-logo {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.footer-left p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: var(--font-weight-medium);
    transition: color 0.3s var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-social {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.3s var(--transition-smooth);
}

.footer-social a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-3px);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 6rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    
    .hero-right {
        order: -1;
    }
    
    .hero-image-wrapper {
        max-width: 350px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(10, 10, 10, 0.98);
        width: 100%;
        text-align: center;
        transition: left 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        padding: 1rem 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .section-number {
        font-size: 3rem;
    }
    
    .hero {
        padding: 6rem 2rem 4rem;
    }
    
    .section {
        padding: var(--section-padding) 2rem;
    }
    
    .hero-cta-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cta-button {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .skills-grid,
    .work-grid,
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links,
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1.5rem;
    }
    
    .hero-image-wrapper {
        max-width: 250px;
    }
    
    .scroll-indicator {
        display: none;
    }
}

/* ========================================
   BACK TO TOP BUTTON (Mobile Only)
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    color: var(--color-text-primary);
    border: none;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
    transition: all 0.3s var(--transition-smooth);
    opacity: 0;
    transform: translateY(100px);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 30px rgba(0, 102, 255, 0.5);
}

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

/* Show only on mobile devices */
@media (max-width: 768px) {
    .back-to-top {
        display: flex;
    }
}

@media (max-width: 480px) {
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
    }
}