/* ========================================
   DESIGN TOKENS & VARIABLES
   ======================================== */
:root {
    /* Colors - Dark Mode with Vibrant Accents */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #16161f;
    --bg-card: rgba(22, 22, 31, 0.45);
    --bg-glass: rgba(22, 22, 31, 0.3);
    --bg-nav-scrolled: rgba(10, 10, 15, 0.65);

    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b5;
    --text-muted: #6b6b80;

    --accent-primary: #6c5ce7;
    --accent-secondary: #a29bfe;
    --accent-tertiary: #fd79a8;
    --accent-glow: rgba(108, 92, 231, 0.3);

    --gradient-primary: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #fd79a8 100%);
    --gradient-secondary: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    --gradient-text: linear-gradient(135deg, #a29bfe 0%, #fd79a8 100%);
    --gradient-card: linear-gradient(135deg, rgba(108, 92, 231, 0.08) 0%, rgba(162, 155, 254, 0.04) 100%);

    --border-color: rgba(108, 92, 231, 0.15);
    --border-glow: rgba(108, 92, 231, 0.4);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.15);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
}

/* ========================================
   LIGHT THEME VARIABLES
   ======================================== */
body.light-theme {
    /* Colors - Light Mode with Vibrant Accents */
    --bg-primary: #f5f6fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ebedf2;
    --bg-card: rgba(255, 255, 255, 0.55);
    --bg-glass: rgba(255, 255, 255, 0.45);
    --bg-nav-scrolled: rgba(255, 255, 255, 0.65);

    --text-primary: #1e272e;
    --text-secondary: #4b5563;
    --text-muted: #8892b0;

    --border-color: rgba(108, 92, 231, 0.12);
    --border-glow: rgba(108, 92, 231, 0.3);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.06);
}

body.light-theme .shape {
    opacity: 0.15;
}

/* ========================================
   RESET & BASE
   ======================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul,
ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   CURSOR GLOW EFFECT
   ======================================== */
.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
}

.cursor-trail {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    animation: trailFade 0.8s ease-out forwards;
    background: var(--trail-color, #00cef5);
    box-shadow: 
        0 0 4px var(--trail-color, #00cef5),
        0 0 10px var(--trail-color, #00cef5);
}

@keyframes trailFade {
    0% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.2);
    }
}

/* ========================================
   PARTICLE CANVAS
   ======================================== */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: var(--container-width);
    z-index: 1000;
    padding: 12px 0;
    transition: all var(--transition-base);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

.navbar.scrolled {
    top: 10px;
    padding: 8px 0;
    background: var(--bg-nav-scrolled);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.nav-container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: transform var(--transition-spring);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.logo-bracket {
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(108, 92, 231, 0.1);
}

.nav-link.active {
    color: var(--accent-secondary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    font-size: 1.2rem;
    color: var(--text-primary);
    transition: transform var(--transition-fast), color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    margin-left: 10px;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    color: var(--accent-secondary);
}


/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px 24px 60px;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-primary);
    top: -100px;
    right: -100px;
    animation: floatShape 8s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-tertiary);
    bottom: -100px;
    left: -100px;
    animation: floatShape 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-secondary);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: floatShape 12s ease-in-out infinite;
}

@keyframes floatShape {

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

    33% {
        transform: translate(30px, -30px) scale(1.05);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    animation: fadeInUp 0.8s ease-out both;
}

.wave-emoji {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
}

@keyframes wave {

    0%,
    60%,
    100% {
        transform: rotate(0deg);
    }

    10% {
        transform: rotate(14deg);
    }

    20% {
        transform: rotate(-8deg);
    }

    30% {
        transform: rotate(14deg);
    }

    40% {
        transform: rotate(-4deg);
    }

    50% {
        transform: rotate(10deg);
    }
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.name-first {
    display: block;
    color: var(--text-primary);
}

.name-last {
    display: block;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-typing-wrapper {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    min-height: 30px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.typing-text {
    color: var(--accent-secondary);
    font-weight: 600;
}

.typing-cursor {
    color: var(--accent-primary);
    animation: blink 0.8s infinite;
    font-weight: 300;
}

@keyframes blink {

    0%,
    50% {
        opacity: 1;
    }

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

.hero-description {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 500px;
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
}

.btn-outline:hover {
    background: rgba(108, 92, 231, 0.1);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.hero-socials {
    display: flex;
    gap: 12px;
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: all var(--transition-base);
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.social-link:hover {
    color: var(--accent-secondary);
    border-color: var(--accent-primary);
    background: rgba(108, 92, 231, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.2);
}

/* Hero Visual / Avatar */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease-out 0.3s both;
}

.avatar-ring {
    position: relative;
    width: 340px;
    height: 340px;
}

.avatar-glow {
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.15;
    filter: blur(40px);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.15;
        transform: scale(1);
    }

    50% {
        opacity: 0.25;
        transform: scale(1.05);
    }
}

.avatar-container {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    padding: 6px;
    background: var(--gradient-primary);
    background-size: 200% 200%;
    animation: borderGlow 3s ease-in-out infinite;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
}

.avatar-container:hover {
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(108, 92, 231, 0.5), 0 0 80px rgba(162, 155, 254, 0.2);
    animation: borderGlow 1s ease-in-out infinite;
}

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

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 50%;
    border: 4px solid var(--bg-primary);
    display: block;
    transition: transform 0.4s ease, filter 0.4s ease;
}

.avatar-container:hover .avatar-img {
    transform: scale(1.03);
    filter: brightness(1.1);
}

.avatar-container::after {
    content: '';
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    background: radial-gradient(
        circle 120px at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(255, 255, 255, 0.25),
        transparent 80%
    );
    z-index: 3;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.avatar-container:hover::after {
    opacity: 1;
}

.avatar-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.avatar-placeholder i {
    font-size: 4rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.avatar-placeholder span {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.orbit-badges {
    position: absolute;
    inset: 0;
    z-index: 3;
    animation: orbit 20s linear infinite;
}

.orbit-badge {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent-secondary);
    box-shadow: var(--shadow-md);
    animation: counterOrbit 20s linear infinite;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.orbit-badge:hover {
    transform: scale(1.2) !important;
    box-shadow: var(--shadow-glow);
}

.badge-1 {
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.badge-2 {
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
}

.badge-3 {
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
}

.badge-4 {
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
}

@keyframes orbit {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes counterOrbit {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(-360deg);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: fadeInUp 1s ease-out 1s both;
    z-index: 1;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 2px;
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {

    0%,
    100% {
        opacity: 1;
        top: 6px;
    }

    50% {
        opacity: 0.3;
        top: 18px;
    }
}

/* ========================================
   SECTION COMMON
   ======================================== */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 1;
}

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

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-secondary);
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    margin: 0 auto;
}

/* ========================================
   ANIMATIONS (Scroll Reveal)
   ======================================== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: start;
}

.about-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-description strong {
    color: var(--accent-secondary);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 30px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.stat-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    font-weight: 500;
}

.about-info-cards {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.info-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(6px);
    box-shadow: var(--shadow-glow);
}

.info-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-secondary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.info-content {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.info-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ========================================
   EXPERIENCE (Timeline)
   ======================================== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-tertiary));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -33px;
    top: 24px;
    z-index: 2;
}

.marker-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.3);
    transition: all var(--transition-base);
}

.timeline-item:hover .marker-dot {
    transform: scale(1.3);
    box-shadow: 0 0 0 6px rgba(108, 92, 231, 0.2), 0 0 20px rgba(108, 92, 231, 0.4);
}

.timeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.timeline-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(8px);
    box-shadow: var(--shadow-glow);
}

.timeline-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--accent-secondary);
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-company {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 12px;
}

.timeline-company i {
    color: var(--accent-primary);
    font-size: 0.85rem;
}

.timeline-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.7;
}

.timeline-list {
    padding-left: 0;
}

.timeline-list li {
    font-size: 0.92rem;
    color: var(--text-muted);
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.timeline-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-secondary);
}

/* ========================================
   EDUCATION SECTION
   ======================================== */
.education {
    background: var(--bg-secondary);
}

.education-card-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.edu-card-main {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    display: flex;
    gap: 30px;
    align-items: start;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
    overflow: hidden;
}

.edu-card-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.edu-card-main:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.edu-card-badge {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--accent-secondary);
    flex-shrink: 0;
}

.edu-university {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.edu-program {
    font-size: 1rem;
    color: var(--accent-secondary);
    font-weight: 600;
    margin-bottom: 8px;
}

.edu-period {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 20px;
}

.edu-highlights {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.edu-highlight {
    display: flex;
    align-items: start;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(108, 92, 231, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(108, 92, 231, 0.08);
}

.edu-highlight.journal-link {
    transition: all var(--transition-base);
    cursor: pointer;
}

.edu-highlight.journal-link:hover {
    background: rgba(108, 92, 231, 0.12);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Cum Laude Custom Styles */
.edu-highlight.highlight-cumlaude {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.05) 0%, rgba(212, 175, 55, 0.02) 100%);
    border: 1px solid rgba(212, 175, 55, 0.15);
}

.edu-highlight.highlight-cumlaude .highlight-icon {
    background: rgba(212, 175, 55, 0.12);
    color: #ffd700;
}

.edu-highlight.highlight-cumlaude:hover {
    border-color: rgba(255, 215, 0, 0.4);
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.12);
    transform: translateY(-2px);
    transition: all var(--transition-base);
}

body.light-theme .edu-highlight.highlight-cumlaude {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.06) 0%, rgba(184, 134, 11, 0.03) 100%);
    border-color: rgba(212, 175, 55, 0.2);
}

body.light-theme .edu-highlight.highlight-cumlaude .highlight-icon {
    background: rgba(212, 175, 55, 0.1);
    color: #b8860b;
}

body.light-theme .edu-highlight.highlight-cumlaude:hover {
    border-color: #b8860b;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.15);
}

.badge-cumlaude {
    display: inline-flex;
    align-items: center;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(212, 175, 55, 0.1) 100%);
    color: #ffd700;
    border: 1px solid rgba(255, 215, 0, 0.25);
    margin-left: 8px;
    vertical-align: middle;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    line-height: 1;
}

body.light-theme .badge-cumlaude {
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.15) 0%, rgba(184, 134, 11, 0.1) 100%);
    color: #b8860b;
    border-color: rgba(212, 175, 55, 0.3);
}

.edu-grid-secondary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.edu-card-sub {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    gap: 16px;
    align-items: start;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.edu-card-sub:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.edu-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-secondary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.edu-card-sub-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.edu-school-name {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.edu-level {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}



.highlight-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: rgba(108, 92, 231, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-secondary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.highlight-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.highlight-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.5;
}

/* ========================================
   SKILLS SECTION
   ======================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    cursor: default;
}

.skill-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.skill-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-size: 1.4rem;
    color: var(--accent-secondary);
    transition: all var(--transition-base);
}

.skill-card:hover .skill-icon {
    background: var(--gradient-secondary);
    color: #fff;
    transform: scale(1.1) rotate(5deg);
}

.skill-card h3 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.skill-bar {
    width: 100%;
    height: 6px;
    background: rgba(108, 92, 231, 0.1);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    background: var(--gradient-secondary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   PROJECTS SECTION
   ======================================== */
.projects {
    background: var(--bg-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.project-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.project-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-secondary);
    font-size: 1.6rem;
}

.project-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.project-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.project-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
    margin-bottom: 8px;
}

.tech-tag {
    font-size: 0.75rem;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: rgba(108, 92, 231, 0.08);
    color: var(--accent-secondary);
    border: 1px solid rgba(108, 92, 231, 0.1);
    font-weight: 500;
}

.project-link {
    width: fit-content;
    padding: 10px 18px;
    font-size: 0.85rem;
    margin-top: 10px;
}

/* ========================================
   CERTIFICATES SECTION
   ======================================== */
.certificates {
    background: var(--bg-secondary);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
}

.cert-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.cert-img-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1.414 / 1;
    overflow: hidden;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.cert-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform var(--transition-slow);
}

.cert-card:hover .cert-img {
    transform: scale(1.05);
}

.cert-img-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 15, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
    backdrop-filter: blur(2px);
}

.cert-img-container:hover .cert-img-overlay {
    opacity: 1;
}

.cert-zoom-btn {
    padding: 10px 20px;
    background: var(--gradient-secondary);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transform: translateY(10px);
    transition: transform var(--transition-spring), box-shadow var(--transition-base);
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.cert-img-container:hover .cert-zoom-btn {
    transform: translateY(0);
}

.cert-zoom-btn:hover {
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.6);
}

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

.cert-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.3;
}

.cert-issuer,
.cert-date {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.cert-issuer i,
.cert-date i {
    color: var(--accent-primary);
    font-size: 0.8rem;
}

.cert-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: 12px;
    line-height: 1.6;
}

/* ========================================
   LIGHTBOX MODAL FOR CERTIFICATES
   ======================================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background-color: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content-wrapper {
    position: relative;
    max-width: 85%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    transform: scale(0.9);
    transition: transform var(--transition-spring);
}

.lightbox.active .lightbox-content-wrapper {
    transform: scale(1);
}

.lightbox-content {
    max-width: 100%;
    max-height: 75vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), 0 0 40px rgba(108, 92, 231, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-caption {
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

/* Lightbox Controls */
.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(22, 22, 31, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2010;
}

.lightbox-close {
    top: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 2rem;
    line-height: 1;
}

.lightbox-close:hover {
    background: rgba(253, 121, 168, 0.2);
    border-color: var(--accent-tertiary);
    color: var(--accent-tertiary);
    transform: scale(1.1) rotate(90deg);
}

.lightbox-prev,
.lightbox-next {
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.5rem;
}

.lightbox-prev {
    left: 40px;
}

.lightbox-next {
    right: 40px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(108, 92, 231, 0.2);
    border-color: var(--accent-primary);
    color: var(--accent-secondary);
}

.lightbox-prev:hover {
    transform: translateY(-50%) translateX(-4px) scale(1.05);
}

.lightbox-next:hover {
    transform: translateY(-50%) translateX(4px) scale(1.05);
}

/* Light Theme overrides for Lightbox */
body.light-theme .lightbox {
    background-color: rgba(245, 246, 250, 0.95);
}

body.light-theme .lightbox-caption {
    color: #1e272e;
    text-shadow: none;
}

body.light-theme .lightbox-close,
body.light-theme .lightbox-prev,
body.light-theme .lightbox-next {
    background: rgba(255, 255, 255, 0.8);
    color: #1e272e;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
    .lightbox-content-wrapper {
        max-width: 95%;
    }
    
    .lightbox-prev {
        left: 15px;
    }
    
    .lightbox-next {
        right: 15px;
    }
    
    .lightbox-close {
        top: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.6rem;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 46px;
        height: 46px;
        font-size: 1.1rem;
    }
}

/* ========================================
   ORGANIZATION SECTION
   ======================================== */
.org-card-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.org-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px;
    display: flex;
    gap: 24px;
    align-items: start;
    transition: all var(--transition-base);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.org-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.org-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--accent-secondary);
    flex-shrink: 0;
}

.org-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.org-company {
    font-size: 0.95rem;
    color: var(--accent-secondary);
    font-weight: 500;
    margin-bottom: 6px;
}

.org-period {
    font-size: 0.82rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 16px;
}

.org-activities {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.org-activities li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
}

.org-activities li i {
    color: var(--accent-secondary);
    font-size: 0.8rem;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    background: var(--bg-secondary);
}

.contact-grid {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.contact-info>p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    text-align: left;
}

.contact-card-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.contact-card-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(108, 92, 231, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-secondary);
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-item-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.contact-item-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-tertiary);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 16px;
    font-size: 1rem;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    padding: 50px 0 30px;
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.heart {
    animation: heartbeat 1.5s ease-in-out infinite;
    display: inline-block;
}

@keyframes heartbeat {

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

    50% {
        transform: scale(1.2);
    }
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-socials a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.footer-socials a:hover {
    color: var(--accent-secondary);
    border-color: var(--accent-primary);
    background: rgba(108, 92, 231, 0.1);
    transform: translateY(-3px);
}

.footer-copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--gradient-secondary);
    color: #fff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.5);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

/* Tablet */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-socials {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .avatar-ring {
        width: 260px;
        height: 260px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }


    .edu-card-main {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .edu-highlight {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .org-card {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }

    .org-activities li {
        justify-content: center;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-glass);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 4px;
        transition: right var(--transition-base);
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        order: 4;
        margin-left: 10px;
    }

    .theme-toggle {
        order: 3;
        margin-left: 10px;
    }

    .lang-toggle {
        order: 2;
        margin-left: 10px;
    }

    .nav-logo {
        order: 1;
        margin-right: auto;
    }

    .nav-link {
        width: 100%;
        padding: 14px 18px;
        border-radius: var(--radius-md);
    }

    .hero {
        padding-top: 80px;
        min-height: auto;
        padding-bottom: 80px;
    }

    .hero-name {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero-typing-wrapper {
        font-size: 1rem;
    }

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

    .btn {
        width: 100%;
        max-width: 260px;
        justify-content: center;
    }

    .avatar-ring {
        width: 200px;
        height: 200px;
    }

    .orbit-badge {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-marker {
        left: -27px;
    }

    .timeline-card {
        padding: 20px;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .skill-card {
        padding: 18px 14px;
    }

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

    .contact-form-wrapper {
        padding: 24px;
    }

    .scroll-indicator {
        display: none;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

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

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .stat-card {
        padding: 14px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .hero-cta {
        gap: 12px;
    }
}

/* Overlay for mobile nav */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 998;
    backdrop-filter: blur(4px);
}

.nav-overlay.active {
    display: block;
}

/* Preference: Reduced Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    .orbit-badges {
        animation: none;
    }

    .orbit-badge {
        animation: none;
    }

    [data-animate] {
        opacity: 1;
        transform: none;
    }
}

/* ========================================
   LANGUAGE SWITCHER
   ======================================== */
body.lang-en .lang-id {
    display: none !important;
}
body:not(.lang-en) .lang-en {
    display: none !important;
}

.lang-toggle {
    background: none;
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 6px 12px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    margin-left: 10px;
    font-family: var(--font-display);
}

.lang-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-secondary);
    transform: scale(1.05);
}