/* =====================================================
   DAYA SHANKER - PROFESSIONAL PORTFOLIO
   Premium Design with Animations
   ===================================================== */

/* CSS Variables */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    --gradient-2: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
    --gradient-3: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --shadow-sm: 0 1px 2px 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);
    --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

/* =====================================================
   ANIMATED BACKGROUND
   ===================================================== */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.floating-shapes span {
    position: absolute;
    display: block;
    width: 20px;
    height: 20px;
    background: var(--gradient-1);
    opacity: 0.1;
    border-radius: 50%;
    animation: float-up 25s linear infinite;
}

.floating-shapes span:nth-child(1) { left: 10%; width: 80px; height: 80px; animation-delay: 0s; }
.floating-shapes span:nth-child(2) { left: 20%; width: 20px; height: 20px; animation-delay: 2s; animation-duration: 12s; }
.floating-shapes span:nth-child(3) { left: 35%; width: 60px; height: 60px; animation-delay: 4s; }
.floating-shapes span:nth-child(4) { left: 50%; width: 40px; height: 40px; animation-delay: 0s; animation-duration: 18s; }
.floating-shapes span:nth-child(5) { left: 65%; width: 20px; height: 20px; animation-delay: 0s; }
.floating-shapes span:nth-child(6) { left: 75%; width: 90px; height: 90px; animation-delay: 3s; }
.floating-shapes span:nth-child(7) { left: 85%; width: 50px; height: 50px; animation-delay: 7s; }
.floating-shapes span:nth-child(8) { left: 25%; width: 25px; height: 25px; animation-delay: 15s; animation-duration: 45s; }
.floating-shapes span:nth-child(9) { left: 55%; width: 15px; height: 15px; animation-delay: 2s; animation-duration: 35s; }
.floating-shapes span:nth-child(10) { left: 90%; width: 70px; height: 70px; animation-delay: 0s; animation-duration: 20s; }

@keyframes float-up {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.1;
    }
    90% {
        opacity: 0.1;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

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

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

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

.animate-fade-in { animation: fadeIn 0.8s ease-out forwards; }
.animate-slide-up { animation: slideUp 0.8s ease-out forwards; }
.animate-slide-up-delay { animation: slideUp 0.8s ease-out 0.2s forwards; opacity: 0; }
.animate-slide-up-delay-2 { animation: slideUp 0.8s ease-out 0.4s forwards; opacity: 0; }
.animate-fade-in-delay { animation: fadeIn 0.8s ease-out 0.3s forwards; opacity: 0; }
.animate-float { animation: float 6s ease-in-out infinite; }
.animate-float-delay { animation: float 6s ease-in-out 1s infinite; }
.animate-float-delay-2 { animation: float 6s ease-in-out 2s infinite; }
.animate-float-delay-3 { animation: float 6s ease-in-out 3s infinite; }

/* =====================================================
   NAVIGATION
   ===================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    padding: 12px 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    text-decoration: none;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

.nav-menu a:not(.nav-cta):hover::after {
    width: 100%;
}

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

.nav-cta {
    background: var(--gradient-1);
    color: white !important;
    padding: 10px 24px;
    border-radius: 100px;
    font-weight: 600;
}

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 32px 60px;
    position: relative;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.1);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-size: 72px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    margin-bottom: 40px;
}

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

.stat-value {
    font-size: 42px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-plus {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--border);
}

.hero-actions {
    display: flex;
    gap: 16px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

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

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

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

.btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 17px;
}

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

.profile-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    text-align: center;
    position: relative;
    z-index: 2;
    border: 1px solid var(--border);
}

.profile-image {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto 24px;
}

.profile-initials {
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 56px;
    font-weight: 800;
    color: white;
    position: relative;
    z-index: 2;
}

.profile-ring {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 3px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.profile-ring::before {
    content: '';
    position: absolute;
    top: -3px;
    left: 50%;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
}

.profile-ring.ring-2 {
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    border-color: rgba(99, 102, 241, 0.1);
    animation-direction: reverse;
    animation-duration: 30s;
}

.profile-info h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.profile-info p {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 16px;
}

.company-badge {
    display: inline-block;
    background: var(--bg-secondary);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}

.profile-social {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    background: var(--bg-secondary);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.social-link.linkedin { color: #0077b5; }
.social-link.youtube { color: #ff0000; }
.social-link.medium { color: #000000; }

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

.social-link.linkedin:hover { background: #0077b5; color: white; }
.social-link.youtube:hover { background: #ff0000; color: white; }
.social-link.medium:hover { background: #000000; color: white; }

/* Floating Badges */
.floating-badge {
    position: absolute;
    background: white;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    z-index: 3;
    border: 1px solid var(--border);
}

.badge-icon {
    font-size: 20px;
}

.badge-1 { top: 20px; left: -20px; }
.badge-2 { bottom: 80px; right: -40px; }
.badge-3 { bottom: -20px; left: 20px; }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 13px;
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: bounce 2s ease-in-out infinite;
}

/* =====================================================
   SECTIONS
   ===================================================== */
.section {
    padding: 120px 32px;
}

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

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

.section-tag {
    display: inline-block;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text {
    margin-bottom: 40px;
}

.about-text .lead {
    font-size: 20px;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 24px;
    line-height: 1.8;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

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

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight-card {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.highlight-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.highlight-icon {
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.highlight-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.highlight-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.highlight-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* Skills */
.about-skills {
    background: white;
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.about-skills h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.skill-item {
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.5s ease;
}

.skill-item.animate-in {
    opacity: 1;
    transform: translateX(0);
}

.skill-name {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

.skill-progress {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease;
}

.languages h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
}

.language-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.language-tag {
    background: var(--bg-secondary);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
}

.language-tag small {
    color: var(--text-muted);
    font-weight: 400;
}

/* =====================================================
   EXPERIENCE SECTION
   ===================================================== */
.experience {
    background: white;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
}

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.marker-dot {
    width: 16px;
    height: 16px;
    background: var(--gradient-1);
    border-radius: 50%;
    flex-shrink: 0;
    position: relative;
}

.marker-dot::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
}

.marker-line {
    width: 2px;
    flex-grow: 1;
    background: var(--border);
    margin-top: 8px;
}

.timeline-item:last-child .marker-line {
    display: none;
}

.timeline-card {
    flex-grow: 1;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.timeline-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.timeline-card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.company-logo {
    width: 56px;
    height: 56px;
    background: var(--gradient-1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    color: white;
}

.card-title h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 2px;
}

.card-title h4 {
    font-size: 15px;
    color: var(--primary);
    font-weight: 500;
}

.timeline-badge {
    margin-left: auto;
    padding: 6px 14px;
    background: var(--bg-primary);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
}

.timeline-badge.current {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
}

.card-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.responsibilities {
    list-style: none;
    margin-bottom: 20px;
}

.responsibilities li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 15px;
}

.responsibilities li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background: var(--gradient-1);
    border-radius: 50%;
}

.card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.card-tags span {
    background: white;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

/* =====================================================
   LINKEDIN INSIGHTS SECTION
   ===================================================== */
.insights {
    background: linear-gradient(135deg, #0077b5 0%, #004182 100%);
    padding: 80px 32px;
}

.insights .section-header {
    margin-bottom: 40px;
}

.insights .section-tag {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.insights .section-title {
    color: white;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 32px;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.insight-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 24px;
    text-decoration: none;
    color: inherit;
    border: none;
    transition: var(--transition);
    display: block;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.insight-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.insight-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #0077b5 0%, #004182 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

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

.insight-content h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
    line-height: 1.3;
}

.insight-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-style: italic;
}

.insight-meta {
    font-size: 12px;
    color: #0077b5;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}

.insight-meta::before {
    content: "♥";
    font-size: 10px;
}

.insights-cta {
    text-align: center;
}

.insights-cta .btn-secondary {
    background: white;
    color: #0077b5;
    border: none;
    font-weight: 600;
}

.insights-cta .btn-secondary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

@media (max-width: 1000px) {
    .insights-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 550px) {
    .insights-grid {
        grid-template-columns: 1fr;
    }

    .insights {
        padding: 60px 20px;
    }
}

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

.publications-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.tab-btn {
    padding: 12px 28px;
    background: white;
    border: 2px solid var(--border);
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.tab-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.article-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.article-card.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

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

.article-image {
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.article-placeholder svg {
    width: 80px;
    height: 80px;
    color: rgba(255, 255, 255, 0.5);
}

.article-content {
    padding: 28px;
}

.article-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}

.article-date,
.article-read {
    font-size: 13px;
    color: var(--text-muted);
}

.article-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}

.article-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 16px;
}

.article-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: var(--transition);
}

.article-link:hover {
    gap: 10px;
}

/* Technical Grid */
.technical-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.technical-card {
    background: white;
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.technical-icon {
    width: 48px;
    height: 48px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.technical-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.technical-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.technical-date {
    font-size: 13px;
    color: var(--text-muted);
}

/* =====================================================
   VIDEOS SECTION
   ===================================================== */
.videos {
    background: white;
    padding: 80px 32px;
}

.videos .section-header {
    margin-bottom: 40px;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.video-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.video-thumbnail iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.videos-cta {
    text-align: center;
}

@media (max-width: 900px) {
    .videos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 500px) {
    .videos-grid {
        grid-template-columns: 1fr;
    }
}

/* =====================================================
   AWARDS SECTION
   ===================================================== */
.awards {
    background: var(--bg-dark);
    color: white;
}

.awards .section-tag {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.awards .section-title {
    color: white;
}

.awards-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.award-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.5s ease;
}

.award-card.animate-in {
    opacity: 1;
    transform: scale(1);
}

.award-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
}

.award-card.premium {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.2));
    border-color: rgba(99, 102, 241, 0.3);
}

.award-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.award-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    position: relative;
    z-index: 1;
}

.award-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.award-year {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.award-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.award-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
    z-index: 1;
}

.award-tag {
    display: inline-block;
    margin-top: 16px;
    padding: 6px 14px;
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* =====================================================
   EDUCATION SECTION
   ===================================================== */
.education {
    background: white;
}

.education-showcase {
    display: flex;
    justify-content: center;
}

.edu-card {
    display: flex;
    gap: 32px;
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    max-width: 800px;
    transition: var(--transition);
}

.edu-card:hover {
    box-shadow: var(--shadow-xl);
}

.edu-logo {
    width: 100px;
    height: 100px;
    background: var(--gradient-1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    color: white;
    flex-shrink: 0;
}

.edu-content h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.edu-degree {
    font-size: 16px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.edu-year {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.edu-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.edu-badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.edu-badges span {
    background: white;
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
    border: 1px solid var(--border);
}

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

.testimonial-highlight {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.testimonial-quote {
    position: relative;
    padding: 48px;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: 32px;
}

.quote-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    opacity: 0.2;
    margin-bottom: 24px;
}

.testimonial-quote p {
    font-size: 22px;
    line-height: 1.8;
    color: var(--text-secondary);
    font-style: italic;
}

.testimonial-cta {
    margin-top: 24px;
}

/* =====================================================
   CONTACT SECTION
   ===================================================== */
.contact {
    background: white;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-content .section-tag {
    margin-bottom: 16px;
}

.contact-content h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-content > p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.contact-item h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item p,
.contact-item a {
    font-size: 16px;
    color: var(--text-secondary);
}

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

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

.contact-card {
    background: var(--gradient-1);
    padding: 48px;
    border-radius: var(--radius-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card-decoration {
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.contact-card h3 {
    font-size: 28px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.contact-card p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    font-size: 16px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.contact-card .btn {
    background: white;
    color: var(--primary);
    position: relative;
    z-index: 1;
}

.contact-card .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
    background: var(--bg-dark);
    padding: 60px 32px 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 32px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 8px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-social a svg {
    width: 20px;
    height: 20px;
}

.footer-social a:hover {
    background: var(--gradient-1);
    color: white;
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-title {
        font-size: 56px;
    }

    .hero-subtitle {
        margin: 0 auto 40px;
    }

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

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

    .hero-visual {
        order: -1;
    }

    .floating-badge {
        display: none;
    }

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

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

    .article-card.featured {
        grid-column: span 1;
        display: block;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-toggle {
        display: flex;
    }

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

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

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

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .stat-divider {
        width: 50px;
        height: 1px;
    }

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

    .section {
        padding: 80px 20px;
    }

    .section-title {
        font-size: 32px;
    }

    .timeline-item {
        flex-direction: column;
        gap: 16px;
    }

    .timeline-marker {
        flex-direction: row;
        gap: 16px;
    }

    .marker-line {
        height: 2px;
        width: 100%;
        margin-top: 0;
        margin-left: 8px;
    }

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

    .edu-logo {
        margin: 0 auto;
    }

    .edu-badges {
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .profile-card {
        padding: 28px;
    }

    .profile-image {
        width: 120px;
        height: 120px;
    }

    .profile-initials {
        font-size: 40px;
    }

    .stat-value {
        font-size: 32px;
    }

    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }
}