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

html {
    scroll-behavior: auto;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --dark-bg: #0f172a;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    --primary-color: #60a5fa;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --light-bg: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    transition: background-color 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.burger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.burger div {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: all 0.3s;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    width: 70px;
    height: 35px;
    cursor: pointer;
    padding: 3px;
    position: relative;
    margin-left: 2rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.toggle-track {
    width: 100%;
    height: 100%;
    position: relative;
    border-radius: 50px;
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    transition: background 0.3s ease;
}

[data-theme="dark"] .toggle-track {
    background: linear-gradient(90deg, #1e3a8a, #1e40af);
}

.toggle-thumb {
    position: absolute;
    top: 50%;
    left: 2px;
    transform: translateY(-50%);
    width: 27px;
    height: 27px;
    background: white;
    border-radius: 50%;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .toggle-thumb {
    left: calc(100% - 29px);
    background: #1e293b;
}

.sun-icon,
.moon-icon {
    position: absolute;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.sun-icon {
    color: #f59e0b;
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    color: #60a5fa;
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

@keyframes toggleBounce {
    0%, 100% { transform: scale(1) rotate(0deg); }
    25% { transform: scale(1.1) rotate(-10deg); }
    50% { transform: scale(0.9) rotate(10deg); }
    75% { transform: scale(1.05) rotate(-5deg); }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 20px 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-text {
    color: var(--text-white);
}

.hero-text .main-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -1px;
}

.hero-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn-primary {
    background: var(--text-white);
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    border: 2px solid var(--text-white);
    color: var(--text-white);
    background: transparent;
}

.btn-secondary:hover {
    background: var(--text-white);
    color: var(--primary-color);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 5px solid rgba(255, 255, 255, 0.3);
}

.hero-animation {
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.robot-container {
    position: relative;
    width: 350px;
    height: 400px;
}

.robot {
    position: relative;
    animation: float 3s ease-in-out infinite;
    transform-style: preserve-3d;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotateY(0deg); }
    25% { transform: translateY(-15px) rotateY(-5deg); }
    50% { transform: translateY(-25px) rotateY(0deg); }
    75% { transform: translateY(-15px) rotateY(5deg); }
}

.robot-head {
    width: 130px;
    height: 130px;
    background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 50%, #c7d2fe 100%);
    border-radius: 25px;
    margin: 0 auto 10px;
    position: relative;
    box-shadow: 
        0 10px 40px rgba(59, 130, 246, 0.4),
        inset 0 2px 10px rgba(255, 255, 255, 0.5),
        inset 0 -2px 10px rgba(59, 130, 246, 0.2);
    border: 3px solid rgba(255, 255, 255, 0.8);
    animation: headTilt 4s ease-in-out infinite;
}

@keyframes headTilt {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-3deg); }
    75% { transform: rotate(3deg); }
}

.antenna {
    width: 5px;
    height: 35px;
    background: linear-gradient(180deg, #ffffff, #3b82f6);
    position: absolute;
    top: -35px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

.antenna::after {
    content: '';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 15px;
    height: 15px;
    background: radial-gradient(circle, #60a5fa, #3b82f6);
    border-radius: 50%;
    animation: antennaBlink 1.5s infinite;
    box-shadow: 
        0 0 20px rgba(59, 130, 246, 0.8),
        0 0 40px rgba(59, 130, 246, 0.5);
}

@keyframes antennaBlink {
    0%, 100% { 
        opacity: 1; 
        transform: translateX(-50%) scale(1);
        box-shadow: 0 0 20px rgba(59, 130, 246, 0.8), 0 0 40px rgba(59, 130, 246, 0.5);
    }
    50% { 
        opacity: 0.4; 
        transform: translateX(-50%) scale(0.8);
        box-shadow: 0 0 10px rgba(59, 130, 246, 0.4), 0 0 20px rgba(59, 130, 246, 0.2);
    }
}

.eye {
    width: 24px;
    height: 24px;
    background: radial-gradient(circle at 30% 30%, #60a5fa, #2563eb);
    border-radius: 50%;
    position: absolute;
    top: 40px;
    animation: eyeMove 3s infinite;
    box-shadow: 
        0 0 15px rgba(37, 99, 235, 0.6),
        inset 0 2px 5px rgba(255, 255, 255, 0.5);
}

.eye::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    top: 5px;
    left: 6px;
    animation: eyeShine 3s infinite;
}

@keyframes eyeShine {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.eye-left { left: 28px; }
.eye-right { right: 28px; }

@keyframes eyeMove {
    0%, 100% { transform: scale(1); }
    10% { transform: scale(1, 0.1); }
    15% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.mouth {
    width: 60px;
    height: 10px;
    background: linear-gradient(180deg, #2563eb, #1e40af);
    border-radius: 0 0 30px 30px;
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.4);
    animation: mouthTalk 2s infinite;
}

@keyframes mouthTalk {
    0%, 100% { height: 10px; }
    50% { height: 6px; }
}

.robot-body {
    width: 170px;
    height: 200px;
    background: linear-gradient(135deg, #ffffff 0%, #dbeafe 50%, #bfdbfe 100%);
    border-radius: 30px;
    margin: 0 auto;
    position: relative;
    box-shadow: 
        0 20px 50px rgba(59, 130, 246, 0.4),
        inset 0 3px 15px rgba(255, 255, 255, 0.6),
        inset 0 -3px 15px rgba(59, 130, 246, 0.3);
    border: 3px solid rgba(255, 255, 255, 0.9);
}

.circuit-line {
    position: absolute;
    height: 3px;
    background: linear-gradient(90deg, transparent, #3b82f6, #60a5fa, transparent);
    left: 15px;
    right: 15px;
    animation: circuitFlow 2s linear infinite;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

@keyframes circuitFlow {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

.line-1 { top: 50px; animation-delay: 0s; }
.line-2 { top: 85px; animation-delay: 0.5s; }
.line-3 { top: 120px; animation-delay: 1s; }

.led {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.led-1 { 
    top: 60px; 
    background: radial-gradient(circle, #fca5a5, #ef4444);
    animation: ledPulse 1.2s infinite;
    box-shadow: 0 0 20px #ef4444, 0 0 40px rgba(239, 68, 68, 0.5);
}

.led-2 { 
    top: 95px; 
    background: radial-gradient(circle, #86efac, #22c55e);
    animation: ledPulse 1.2s infinite 0.4s;
    box-shadow: 0 0 20px #22c55e, 0 0 40px rgba(34, 197, 94, 0.5);
}

.led-3 { 
    top: 130px; 
    background: radial-gradient(circle, #93c5fd, #3b82f6);
    animation: ledPulse 1.2s infinite 0.8s;
    box-shadow: 0 0 20px #3b82f6, 0 0 40px rgba(59, 130, 246, 0.5);
}

@keyframes ledPulse {
    0%, 100% { 
        opacity: 1; 
        transform: translateX(-50%) scale(1);
    }
    50% { 
        opacity: 0.4; 
        transform: translateX(-50%) scale(0.8);
    }
}

.robot-arms {
    position: relative;
}

.arm {
    width: 18px;
    height: 90px;
    background: linear-gradient(180deg, #ffffff 0%, #e0e7ff 50%, #c7d2fe 100%);
    border-radius: 12px;
    position: absolute;
    top: -150px;
    box-shadow: 
        0 8px 20px rgba(59, 130, 246, 0.3),
        inset 0 2px 5px rgba(255, 255, 255, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.arm::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #ffffff, #dbeafe);
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.arm-left {
    left: -30px;
    animation: waveLeft 2.5s ease-in-out infinite;
}

.arm-right {
    right: -30px;
    animation: waveRight 2.5s ease-in-out infinite;
}

@keyframes waveLeft {
    0%, 100% { transform: rotate(-15deg) translateY(0); }
    25% { transform: rotate(-30deg) translateY(-5px); }
    50% { transform: rotate(-20deg) translateY(0); }
    75% { transform: rotate(-35deg) translateY(-8px); }
}

@keyframes waveRight {
    0%, 100% { transform: rotate(15deg) translateY(0); }
    25% { transform: rotate(30deg) translateY(-5px); }
    50% { transform: rotate(20deg) translateY(0); }
    75% { transform: rotate(35deg) translateY(-8px); }
}

.floating-icons {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.floating-icons i {
    position: absolute;
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.9);
    animation: floatIcon 5s ease-in-out infinite;
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.6);
    filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.4));
}

.floating-icons i:nth-child(1) {
    top: 8%;
    left: 8%;
    animation-delay: 0s;
}

.floating-icons i:nth-child(2) {
    top: 15%;
    right: 8%;
    animation-delay: 1.25s;
}

.floating-icons i:nth-child(3) {
    bottom: 18%;
    left: 3%;
    animation-delay: 2.5s;
}

.floating-icons i:nth-child(4) {
    bottom: 12%;
    right: 12%;
    animation-delay: 3.75s;
}

@keyframes floatIcon {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg) scale(1); 
        opacity: 0.7; 
    }
    25% { 
        transform: translateY(-20px) rotate(-10deg) scale(1.1); 
        opacity: 1; 
    }
    50% { 
        transform: translateY(-10px) rotate(5deg) scale(1.05); 
        opacity: 0.8; 
    }
    75% { 
        transform: translateY(-15px) rotate(10deg) scale(1.08); 
        opacity: 0.9; 
    }
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator a {
    color: var(--text-white);
    font-size: 2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* Section Styles */
section {
    padding: 80px 20px;
    transition: transform 0.3s ease;
    scroll-margin-top: 80px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* About Section */
.about {
    background: var(--card-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

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

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

.social-links-about {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-links-about a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: all 0.3s;
}

.social-links-about a:hover {
    background: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.about-image img {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    border: 3px solid var(--border-color);
}

/* Education Section */
.education {
    background: var(--light-bg);
}

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

.education-card {
    background: var(--card-bg);
    padding: 3rem 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
    position: relative;
    min-height: 350px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

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

.education-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0);
    z-index: 1;
    transition: all 0.4s ease;
}

.education-content {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.95);
    padding: 1.5rem;
    border-radius: 8px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

[data-theme="dark"] .education-content {
    background: rgba(15, 23, 42, 0.95);
}

.education-card:hover .education-content {
    opacity: 1;
    transform: translateY(0);
}

.education-card:hover .education-overlay {
    background: rgba(255, 255, 255, 0.1);
}

.education-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-weight: 700;
    text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .education-card h3 {
    color: #e2e8f0;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
}

.education-card .institution {
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .education-card .institution {
    color: #60a5fa;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
}

.education-card .year {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 600;
    text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .education-card .year {
    color: #94a3b8;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
}

.education-card .description {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 500;
    text-shadow: 1px 1px 3px rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .education-card .description {
    color: #cbd5e1;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
}

/* Work Experience Section */
.experience {
    background: var(--card-bg);
}

.experience-card {
    max-width: 900px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.experience-header {
    height: 250px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    display: flex;
    align-items: flex-end;
    padding: 2rem;
}

.experience-header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.2), rgba(0,0,0,0.7));
    z-index: 1;
}

.experience-header-content {
    position: relative;
    z-index: 2;
    color: var(--text-white);
}

.experience-header-content h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.experience-header-content h4 {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
    opacity: 0.95;
}

.experience-header-content .duration {
    font-size: 1rem;
    opacity: 0.9;
}

.experience-body {
    padding: 2.5rem;
    background: var(--light-bg);
}

.experience-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.93);
    z-index: 1;
    border-radius: 12px;
}

.experience-image {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 3px solid var(--border-color);
    position: relative;
    z-index: 2;
}

.experience-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.experience-image i {
    font-size: 3rem;
    color: var(--text-white);
}

.experience-content {
    position: relative;
    z-index: 2;
}

.experience-content h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.experience-content h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.experience-content .role {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.experience-content .duration {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.responsibilities {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.responsibilities li {
    padding-left: 1.5rem;
    margin-bottom: 0.8rem;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.6;
}

.responsibilities li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    line-height: 1;
}

.visit-link {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--primary-color);
    color: var(--text-white);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
}

.visit-link:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

/* Skills Section */
.skills {
    background: var(--light-bg);
}

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

.skill-category {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.skill-category:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.category-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.category-header h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.skill-item span {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.skill-bar {
    height: 8px;
    background: var(--light-bg);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 1s ease;
}

/* Certifications Section */
.certifications {
    background: var(--card-bg);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.certification-card {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
}

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

.cert-image {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
}

.cert-image i {
    font-size: 2.5rem;
    color: var(--text-white);
}

.cert-preview {
    width: 100%;
    height: 200px;
    border-radius: 8px;
    background: var(--light-bg);
    overflow: hidden;
    position: relative;
    border: 2px solid var(--border-color);
}

.cert-preview embed {
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.cert-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    color: white;
}

.cert-overlay i {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.cert-overlay p {
    font-size: 0.9rem;
    font-weight: 600;
}

.certification-card:hover .cert-overlay {
    opacity: 1;
}

.certification-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.certification-card .institution {
    font-size: 0.95rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.certification-card .year {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.certification-card .view-cert {
    margin-top: 0.8rem;
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
}

.certification-card .view-cert i {
    margin-right: 0.3rem;
}

/* Certificate Modal */
.cert-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s;
}

.cert-modal-content {
    position: relative;
    margin: 2% auto;
    width: 90%;
    height: 90%;
    max-width: 1200px;
}

.cert-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
}

.cert-close:hover,
.cert-close:focus {
    color: var(--primary-color);
}

#certificateFrame {
    width: 100%;
    height: 100%;
    border-radius: 8px;
    background: white;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Projects Section */
.projects {
    background: var(--light-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
}

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

.project-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: var(--text-white);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.tag {
    padding: 0.4rem 1rem;
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary-color);
}

/* Contact Section */
.contact {
    background: var(--card-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 30px;
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.contact-item a:hover {
    color: var(--primary-color);
}

.contact-item span {
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--text-white);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.contact-form {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 1rem;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

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

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

.contact-form .btn {
    width: 100%;
    cursor: pointer;
    background: var(--primary-color);
    color: var(--text-white);
}

.contact-form .btn:hover {
    background: var(--secondary-color);
}

/* Footer */
.footer {
    background: var(--dark-bg);
    color: var(--text-white);
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.9;
}

.footer i {
    color: #ef4444;
}

/* Responsive Design */
@media (max-width: 768px) {
    .burger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        right: 0;
        top: 70px;
        height: calc(100vh - 70px);
        background: var(--card-bg);
        flex-direction: column;
        align-items: center;
        width: 50%;
        transform: translateX(100%);
        transition: transform 0.3s ease-in;
        padding-top: 2rem;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-text .main-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-image img {
        margin: 0 auto;
    }
    
    .social-links-about {
        justify-content: center;
    }
    
    .experience-card {
        grid-template-columns: 1fr;
        padding: 2rem;
        text-align: center;
    }
    
    .experience-image {
        margin: 0 auto;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-text .main-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid,
    .education-grid,
    .certifications-grid {
        grid-template-columns: 1fr;
    }
}