/* ================================
   Professional Portfolio - Premium Design
   Modern, Clean & Elegant
================================ */

/* CSS Reset & Variables */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors - Light Mode */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --accent: #f59e0b;
    --success: #10b981;
    --error: #ef4444;

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

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

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;

    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;

    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.5), 0 8px 10px -6px rgb(0 0 0 / 0.4);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

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

body.loading {
    overflow: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ================================
   Custom Cursor
================================ */
.cursor {
    position: fixed;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: 10000;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background 0.2s;
    mix-blend-mode: difference;
}

.cursor-follower {
    position: fixed;
    width: 40px;
    height: 40px;
    border: 1px solid var(--primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, border-color 0.3s;
    opacity: 0.5;
}

.cursor.hover {
    width: 50px;
    height: 50px;
    background: transparent;
    border: 2px solid var(--primary);
    mix-blend-mode: normal;
}

.cursor-follower.hover {
    width: 60px;
    height: 60px;
    opacity: 0.3;
}

@media (max-width: 1024px) {

    .cursor,
    .cursor-follower {
        display: none;
    }
}

/* ================================
   Loader
================================ */
.loader {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

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

.loader-logo {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2rem;
    letter-spacing: -2px;
}

.loader-bar {
    width: 200px;
    height: 3px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 0 auto 1rem;
}

.loader-progress {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
    animation: loading 2s ease-in-out forwards;
}

@keyframes loading {
    0% {
        width: 0;
    }

    50% {
        width: 70%;
    }

    100% {
        width: 100%;
    }
}

.loader-text {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ================================
   Navigation
================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

[data-theme="dark"] .nav {
    background: rgba(15, 23, 42, 0.8);
}

.nav.scrolled {
    padding: 0.75rem 5%;
    border-bottom-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 4px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

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

    50% {
        transform: scale(1.2);
        opacity: 0.7;
    }
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    position: relative;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

.nav-cta {
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 0.5rem;
    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(6px, 6px);
}

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

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

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    text-align: center;
}

.mobile-link {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0.75rem;
    transition: color var(--transition-fast);
}

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

.mobile-socials {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.mobile-socials a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.mobile-socials a:hover {
    background: var(--primary);
    color: white;
}

.mobile-socials svg {
    width: 20px;
    height: 20px;
}

/* ================================
   Hero Section
================================ */
.hero {
    position: relative;
    min-height: 100vh;
    padding: 140px 5% 80px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 100%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 60%);
    animation: float 15s ease-in-out infinite;
}

@keyframes float {

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

    33% {
        transform: translate(30px, -30px) rotate(5deg);
    }

    66% {
        transform: translate(-20px, 20px) rotate(-5deg);
    }
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
    mask-image: radial-gradient(ellipse at center, white 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, white 30%, transparent 70%);
}

.hero-container {
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease forwards;
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.title-line {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    overflow: hidden;
    justify-content: center;
}

.word {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    color: var(--text-primary);
    letter-spacing: -2px;
    animation: slideUp 0.8s ease forwards;
    animation-delay: calc(var(--i, 0) * 0.1s);
}

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

.word.outline {
    color: transparent;
    -webkit-text-stroke: 2px var(--text-primary);
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

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

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

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

.hero-subtitle strong {
    color: var(--text-primary);
    font-weight: 600;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-tertiary);
    line-height: 1.8;
    max-width: 480px;
    margin: 0 auto 2rem;
    animation: fadeInUp 0.6s ease 0.5s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease 0.6s forwards;
    opacity: 0;
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--primary);
    color: white;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn-primary:hover::before {
    transform: translateX(100%);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -10px var(--primary);
}

.btn-primary svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.btn-primary:hover svg {
    transform: translate(3px, -3px);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    animation: fadeInUp 0.6s ease 0.7s forwards;
    opacity: 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-plus {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 0.25rem;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.hero-image-wrapper {
    position: relative;
}

.hero-image-frame {
    position: relative;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.hero-image-frame::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg, var(--primary), var(--accent), var(--primary));
    animation: rotate 10s linear infinite;
    opacity: 0.3;
}

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

.hero-image {
    position: relative;
    width: 320px;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* Hero Slider */
.hero-slider {
    position: relative;
    width: 320px;
    height: 400px;
}

.hero-slider .slide {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.6s ease-in-out;
}

.hero-slider .slide.active {
    opacity: 1;
}

.slider-dots {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.slider-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slider-dots .dot:hover {
    background: var(--primary-light);
}

.slider-dots .dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

/* Floating Cards */
.hero-floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: floatCard 6s ease-in-out infinite;
}

.hero-floating-card.card-1 {
    top: 10%;
    left: -20%;
    animation-delay: 0s;
}

.hero-floating-card.card-2 {
    top: 50%;
    right: -25%;
    animation-delay: 2s;
}

.hero-floating-card.card-3 {
    bottom: 15%;
    left: -15%;
    animation-delay: 4s;
}

@keyframes floatCard {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.floating-icon {
    font-size: 1.5rem;
}

.floating-text {
    display: flex;
    flex-direction: column;
}

.floating-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.floating-sub {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* Scroll Indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.hero-scroll-indicator span {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: var(--border-color);
    position: relative;
    overflow: hidden;
}

.scroll-dot {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    background: var(--primary);
    border-radius: 50%;
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% {
        top: 0;
        opacity: 1;
    }

    100% {
        top: 100%;
        opacity: 0;
    }
}

/* ================================
   Section Common Styles
================================ */
.section-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 2px;
}

.section-number.light {
    color: rgba(255, 255, 255, 0.6);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0.5rem 0;
    letter-spacing: -1px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-tertiary);
}

/* ================================
   About Section
================================ */
.about {
    padding: 120px 5%;
    background: var(--bg-secondary);
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
}

.about-header {
    text-align: center;
    margin-bottom: 4rem;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-intro h3 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.about-photo {
    margin-bottom: 1.5rem;
}

.about-image {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 4px solid var(--primary);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.about-image:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px -15px var(--primary);
}

.about-text p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.about-highlights {
    margin-top: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
}

.highlight-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--success);
}

.highlight-icon svg {
    width: 20px;
    height: 20px;
}

.highlight-item span {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Skills */
.skills-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

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

.skill-card {
    padding: 1.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

.skill-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.skill-card h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.skill-card p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 1rem;
}

.skill-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1s ease;
}

/* ================================
   Certificates Section
================================ */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.certificate-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.certificate-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.certificate-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.certificate-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

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

.certificate-info {
    padding: 1.5rem;
}

.certificate-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.certificate-issuer {
    font-size: 1rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.certificate-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.certificate-id {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-family: monospace;
    margin-bottom: 1rem;
}

.certificate-link {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-base);
}

.certificate-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* ================================
   Experience Section
================================ */
.experience {
    padding: 120px 5%;
    background: var(--bg-primary);
}

.experience-container {
    max-width: 900px;
    margin: 0 auto;
}

.experience-header {
    text-align: center;
    margin-bottom: 4rem;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}

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

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 0;
}

.marker-dot {
    display: block;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border: 3px solid var(--bg-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--primary);
}

.timeline-content {
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-size: 1rem;
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.timeline-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-tags span {
    padding: 0.25rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ================================
   Work Section
================================ */
.work {
    padding: 120px 5%;
    background: var(--bg-secondary);
}

.work-container {
    max-width: 1200px;
    margin: 0 auto;
}

.work-header {
    text-align: center;
    margin-bottom: 3rem;
}

.work-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-card.featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    min-height: 250px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-btn {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 50%;
    color: var(--text-primary);
    transform: scale(0.8);
    transition: all var(--transition-base);
}

.project-btn:hover {
    transform: scale(1);
    background: var(--primary);
    color: white;
}

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

.project-info {
    padding: 1.5rem;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.project-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.project-year {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.work-cta {
    text-align: center;
    margin-top: 3rem;
}

/* ================================
   Testimonials Section
================================ */
.testimonials {
    padding: 120px 5%;
    background: var(--bg-primary);
}

.testimonials-container {
    max-width: 900px;
    margin: 0 auto;
}

.testimonials-header {
    text-align: center;
    margin-bottom: 4rem;
}

.testimonials-slider {
    position: relative;
    overflow: hidden;
}

.testimonial-card {
    display: none;
    padding: 2.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    text-align: center;
    opacity: 0;
    transform: translateX(50px);
    transition: all var(--transition-base);
}

.testimonial-card.active {
    display: block;
    opacity: 1;
    transform: translateX(0);
}

.quote-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-md);
}

.quote-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.testimonial-text {
    font-size: 1.25rem;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-rating {
    margin-bottom: 2rem;
}

.testimonial-rating span {
    color: var(--accent);
    font-size: 1.25rem;
    margin: 0 2px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary);
}

.author-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.author-info p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.testimonials-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.testimonial-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.testimonial-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.testimonial-btn svg {
    width: 20px;
    height: 20px;
}

.testimonial-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 10px;
    height: 10px;
    background: var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

/* ================================
   Contact Section
================================ */
.contact {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    overflow: hidden;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 80vh;
}

.contact-left {
    padding: 80px 5%;
    display: flex;
    align-items: center;
}

.contact-content {
    max-width: 500px;
}

.contact-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: white;
    line-height: 1.2;
    margin: 1rem 0 1.5rem;
    letter-spacing: -1px;
}

.contact-title .accent {
    color: var(--accent);
}

.contact-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    color: white;
    margin-bottom: 2.5rem;
    transition: all var(--transition-base);
}

.contact-email:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.email-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
}

.email-icon svg {
    width: 20px;
    height: 20px;
}

.email-text {
    font-size: 1rem;
    font-weight: 500;
}

.email-arrow {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.contact-email:hover .email-arrow {
    transform: translateX(5px);
}

.contact-info {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.info-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: white;
}

.info-icon svg {
    width: 18px;
    height: 18px;
}

.info-text span {
    display: block;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
}

.info-text strong {
    font-size: 0.95rem;
    color: white;
    font-weight: 500;
}

.contact-socials {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: white;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: white;
    color: var(--primary);
    transform: translateY(-3px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

/* Contact Form */
.contact-right {
    padding: 80px 5%;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-form {
    width: 100%;
    max-width: 450px;
}

.form-header {
    margin-bottom: 2rem;
}

.form-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-header p {
    font-size: 0.95rem;
    color: var(--text-tertiary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem 0;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group label {
    position: absolute;
    left: 0;
    top: 1rem;
    font-size: 0.95rem;
    color: var(--text-tertiary);
    pointer-events: none;
    transition: all var(--transition-fast);
}

.form-group input:focus+label,
.form-group input:not(:placeholder-shown)+label,
.form-group textarea:focus+label,
.form-group textarea:not(:placeholder-shown)+label {
    top: -0.75rem;
    font-size: 0.75rem;
    color: var(--primary);
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

.form-group input:focus~.form-line,
.form-group textarea:focus~.form-line {
    width: 100%;
}

.form-group textarea {
    resize: none;
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--primary);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-submit:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -10px var(--primary);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
}

.btn-loading {
    display: none;
}

.btn-loading svg {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.btn-submit.loading .btn-text,
.btn-submit.loading .btn-icon {
    display: none;
}

.btn-submit.loading .btn-loading {
    display: block;
}

.btn-submit.success {
    background: var(--success);
}

/* ================================
   Footer
================================ */
.footer {
    background: var(--bg-secondary);
    padding: 80px 5% 40px;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 1rem;
}

.footer-logo .logo-text {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.footer-logo .logo-dot {
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
}

.footer-tagline {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-grid {
    display: flex;
    gap: 4rem;
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.25rem;
}

.footer-col a {
    display: block;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 0.375rem 0;
    transition: all var(--transition-fast);
}

.footer-col a:hover {
    color: var(--primary);
    transform: translateX(5px);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

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

.back-to-top {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-md);
    color: white;
    transition: all var(--transition-fast);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* ================================
   Responsive Design
================================ */
@media (max-width: 1024px) {

    .nav-menu,
    .nav-actions {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        order: 2;
    }

    .hero-visual {
        order: 1;
    }

    .hero-desc {
        margin: 0 auto 2rem;
    }

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

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

    .hero-floating-card {
        display: none;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

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

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

    .project-card.featured {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }

    .contact-container {
        grid-template-columns: 1fr;
    }

    .contact-left,
    .contact-right {
        padding: 60px 5%;
    }

    .footer-top {
        flex-direction: column;
        gap: 3rem;
    }

    .footer-grid {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 5% 60px;
    }

    .hero-badge {
        font-size: 0.75rem;
    }

    .hero-image {
        width: 260px;
        height: 320px;
    }

    .hero-slider {
        width: 260px;
        height: 320px;
    }

    .hero-image-frame {
        padding: 0.75rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat-divider {
        width: 60px;
        height: 1px;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-info {
        flex-direction: column;
        gap: 1rem;
    }

    .testimonial-text {
        font-size: 1rem;
    }

    .footer-grid {
        flex-wrap: wrap;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .footer-links {
        order: -1;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .mobile-link {
        font-size: 2rem;
    }

    .work-filter {
        flex-direction: column;
    }

    .filter-btn {
        width: 100%;
    }

    .hero-image {
        width: 220px;
        height: 280px;
    }

    .hero-slider {
        width: 220px;
        height: 280px;
    }

    .hero-image-frame {
        padding: 0.5rem;
    }

    .slider-dots {
        bottom: -25px;
    }

    .slider-dots .dot {
        width: 10px;
        height: 10px;
    }
}

/* ================================
   Animations & Utils
================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Smooth scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Selection */
::selection {
    background: var(--primary);
    color: white;
}