/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;
    --bg-card: #ffffff;
    
    /* Border & Shadow */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    --gradient-text: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 5rem 0;
    --element-spacing: 2rem;
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

/* Dark Theme */
[data-theme="dark"] {
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --border-color: #334155;
    --border-light: #475569;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

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

/* ===== Container & Layout ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== Loading Screen ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
}

.loader-text {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.loader-text span {
    font-family: var(--font-heading);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: letterGlow 1.5s ease-in-out infinite;
}

.loader-text span:nth-child(2) { animation-delay: 0.1s; }
.loader-text span:nth-child(3) { animation-delay: 0.2s; }
.loader-text span:nth-child(4) { animation-delay: 0.3s; }
.loader-text span:nth-child(5) { animation-delay: 0.4s; }

.loader-bar {
    width: 200px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.loader-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    animation: loadingProgress 2s ease-in-out infinite;
}

@keyframes letterGlow {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(-10px); opacity: 0.7; }
}

@keyframes loadingProgress {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* ===== Custom Cursor ===== */
.cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
    transition: transform 0.1s ease;
}

.cursor-follower {
    position: fixed;
    width: 40px;
    height: 40px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.2s ease;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.navbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-brand .brand-link {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

.brand-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-dot {
    color: var(--primary-color);
    margin-left: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    position: relative;
    font-weight: 500;
    color: var(--text-primary);
    padding: 0.5rem 0;
    transition: all var(--transition-base);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

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

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

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

.btn-resume {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all var(--transition-base);
}

.btn-resume:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: all var(--transition-base);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

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

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 6rem 0 4rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: var(--radius-2xl);
    background: var(--gradient-primary);
    opacity: 0.1;
    animation: floatAnimation 6s ease-in-out infinite;
}

.shape-1 {
    width: 100px;
    height: 100px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 150px;
    height: 150px;
    top: 60%;
    right: 10%;
    animation-delay: 2s;
}

.shape-3 {
    width: 80px;
    height: 80px;
    bottom: 30%;
    left: 20%;
    animation-delay: 4s;
}

.shape-4 {
    width: 120px;
    height: 120px;
    top: 10%;
    right: 30%;
    animation-delay: 1s;
}

@keyframes floatAnimation {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-greeting {
    margin-bottom: 1rem;
}

.greeting-text {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.hero-title {
    margin-bottom: 2rem;
}

.title-name {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.title-role {
    display: block;
    font-size: var(--font-size-3xl);
    color: var(--text-secondary);
    font-weight: 600;
}

.hero-subtitle {
    margin-bottom: 2rem;
}

.typing-container {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.static-text {
    color: var(--text-secondary);
}

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

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

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

.hero-description {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: 3rem;
    color: var(--text-secondary);
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.hero-social {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.social-label {
    font-size: var(--font-size-sm);
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

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

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

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

.image-bg {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    opacity: 0.2;
    animation: imagePulse 3s ease-in-out infinite;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-2xl);
    position: relative;
    z-index: 2;
}

.image-frame {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 4px solid var(--primary-color);
    border-radius: var(--radius-2xl);
    z-index: 3;
}

@keyframes imagePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
}

.tech-icon {
    position: absolute;
    width: 60px;
    height: 60px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    box-shadow: var(--shadow-lg);
    animation: techIconFloat 4s ease-in-out infinite;
}

.tech-react {
    top: 10%;
    right: -10%;
    color: #61dafb;
    animation-delay: 0s;
}

.tech-java {
    bottom: 20%;
    right: -15%;
    color: #f89820;
    animation-delay: 1s;
}

.tech-aws {
    top: 30%;
    left: -15%;
    color: #ff9900;
    animation-delay: 2s;
}

.tech-js {
    bottom: 10%;
    left: -10%;
    color: #f7df1e;
    animation-delay: 3s;
}

@keyframes techIconFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(180deg); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-light);
}

.scroll-text {
    font-size: var(--font-size-sm);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-arrow {
    animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== About Section ===== */
.about {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

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

.text-block {
    margin-bottom: 2rem;
}

.text-block h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: var(--font-size-xl);
}

.text-block p {
    line-height: 1.7;
}

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

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.highlight-item i {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    width: 24px;
}

.info-cards {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.info-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

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

.card-header h3 {
    color: var(--text-primary);
}

.education-timeline {
    position: relative;
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.edu-item {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 2rem;
}

.edu-item::before {
    content: '';
    position: absolute;
    left: 9px;
    top: 8px;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-card);
}

.edu-year {
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.edu-details h4 {
    margin-bottom: 0.25rem;
    font-size: var(--font-size-lg);
}

.edu-details p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.status,
.grade {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.skill-category {
    margin-bottom: 1.5rem;
}

.skill-category h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

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

.skill-tag {
    padding: 0.5rem 1rem;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===== Experience Section ===== */
.experience {
    padding: var(--section-padding);
}

.experience-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
    width: 100%;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 55%;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 55%;
    text-align: left;
}

.timeline-date {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--text-white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    white-space: nowrap;
    z-index: 2;
}

.timeline-content {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: all var(--transition-base);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 30px;
    width: 0;
    height: 0;
    border: 15px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -30px;
    border-left-color: var(--bg-card);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -30px;
    border-right-color: var(--bg-card);
}

.company-info {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.company-logo {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--text-white);
    flex-shrink: 0;
}

.company-logo.jpmorgan {
    background: linear-gradient(135deg, #1565C0 0%, #1976D2 100%);
}

.company-logo.deloitte {
    background: linear-gradient(135deg, #86BC25 0%, #98D642 100%);
}

.company-logo.aws {
    background: linear-gradient(135deg, #FF9900 0%, #FFB84D 100%);
}

.company-details h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.company-details h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: var(--font-size-lg);
}

.duration {
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.experience-description {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.experience-highlights {
    list-style: none;
    margin-bottom: 1.5rem;
}

.experience-highlights li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.experience-highlights li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: var(--font-size-sm);
}

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

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.experience-certificate {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

.certificate-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--gradient-accent);
    color: var(--text-white);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
}

.certificate-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.certificate-link i {
    font-size: 0.875rem;
}

/* ===== Certificates Section ===== */
.certificates-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border-light);
}

.certificates-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.certificates-title i {
    color: var(--accent-color);
    font-size: 1.5rem;
}

.certificates-subtitle {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    margin-bottom: 2rem;
}

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

@media (max-width: 768px) {
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

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

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

.certificate-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}

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

.certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.certificate-actions {
    display: flex;
    gap: 1rem;
}

.cert-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
}

.cert-link:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-2px);
}

.certificate-content {
    padding: 1.5rem;
}

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

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

.certificate-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.certificate-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.cert-badge {
    padding: 0.25rem 0.75rem;
    background: var(--gradient-primary);
    color: var(--text-white);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.resume-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2.5rem 1.5rem;
}

.resume-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.resume-icon i {
    font-size: 2rem;
    color: var(--text-white);
}

.resume-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.resume-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-base);
    font-size: var(--font-size-sm);
}

.view-resume {
    background: var(--gradient-primary);
    color: var(--text-white);
}

.download-resume {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.resume-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.view-resume:hover {
    background: var(--gradient-accent);
}

.download-resume:hover {
    background: var(--primary-color);
    color: var(--text-white);
}

/* ===== Projects Section ===== */
.projects {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    position: relative;
}

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

.project-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.project-card.research {
    border: 2px solid var(--accent-color);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.project-card.featured .project-image {
    height: auto;
}

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

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-base);
}

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

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

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--text-white);
    color: var(--text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.project-link:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: scale(1.1);
}

.project-content {
    padding: 2rem;
}

.project-header {
    margin-bottom: 1rem;
}

.project-title {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.project-description {
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-features {
    margin-bottom: 1.5rem;
}

.project-features ul {
    list-style: none;
    margin: 1rem 0;
}

.project-features li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.project-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-status {
    display: flex;
    justify-content: flex-end;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.status-badge.completed {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-badge.published {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--section-padding);
}

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

.contact-text {
    margin-bottom: 2rem;
}

.contact-text h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.contact-text p {
    line-height: 1.7;
}

.contact-methods {
    margin-bottom: 2rem;
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.contact-method:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.method-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.method-details h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.method-details p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.method-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
}

.method-link:hover {
    text-decoration: underline;
}

.availability {
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--success-color);
}

.availability-status {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-indicator {
    width: 12px;
    height: 12px;
    background: var(--success-color);
    border-radius: 50%;
    animation: statusPulse 2s ease-in-out infinite;
}

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

.contact-form-container {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.form-submit {
    align-self: flex-start;
    margin-top: 1rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 3rem 0 1rem;
}

[data-theme="dark"] .footer {
    background: var(--bg-tertiary);
}

.footer-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    color: var(--text-white);
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
}

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

.footer-section h4 {
    color: var(--text-white);
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-base);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

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

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--text-white);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom i {
    color: var(--error-color);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-container,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-image {
        order: -1;
    }
    
    .image-container {
        width: 300px;
        height: 300px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card.featured {
        grid-template-columns: 1fr;
    }
    
    .experience-timeline::before {
        left: 30px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 60px;
        margin-right: 0;
        text-align: left;
    }
    
    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -30px;
        border-right-color: var(--bg-card);
        border-left-color: transparent;
    }
    
    .timeline-date {
        left: 30px;
        transform: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        box-shadow: var(--shadow-xl);
        padding: 2rem;
        transition: all var(--transition-base);
        opacity: 0;
        visibility: hidden;
    }
    
    .nav-menu.active {
        top: 100%;
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .nav-actions {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        padding: 8rem 0 4rem;
    }
    
    .title-name {
        font-size: var(--font-size-4xl);
    }
    
    .title-role {
        font-size: var(--font-size-2xl);
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .section-header {
        margin-bottom: 3rem;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-links {
        gap: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .project-image {
        height: 200px;
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .certificate-actions {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .resume-actions {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .company-info {
        flex-direction: column;
        text-align: center;
    }
    
    .timeline-content {
        padding: 1.5rem;
    }
    
    .project-content {
        padding: 1.5rem;
    }
    
    .contact-form-container {
        padding: 1.5rem;
    }
    
    .image-container {
        width: 250px;
        height: 250px;
    }
    
    .certificates-title {
        font-size: var(--font-size-xl);
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .resume-card {
        padding: 2rem 1rem;
    }
    
    .resume-icon {
        width: 60px;
        height: 60px;
    }
    
    .resume-icon i {
        font-size: 1.5rem;
    }
}