/* === Enhanced Academic Portfolio Styles === */
/* Combining modern design with academic professionalism */

/* === Google Fonts === */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400;1,700&family=Source+Sans+Pro:wght@300;400;600;700&family=Source+Code+Pro:wght@400;500;600&display=swap');

/* === CSS Variables === */
:root {
    /* Enhanced Academic Color Palette */
    --primary-color: #1e40af;
    /* Deep Academic Blue */
    --primary-color-light: #3b82f6;
    /* Lighter Blue */
    --primary-color-dark: #1e3a8a;
    /* Darker Blue */
    --accent-color: #dc2626;
    /* Academic Red */
    --accent-color-light: rgba(220, 38, 38, 0.1);
    --secondary-color: #64748b;
    /* Professional Gray */
    --secondary-light: #94a3b8;

    /* Enhanced Gradients */
    --gradient-primary: linear-gradient(135deg, #1e40af, #3b82f6);
    --gradient-accent: linear-gradient(135deg, #dc2626, #ef4444);
    --gradient-bg: linear-gradient(135deg, #f8fafc, #e2e8f0);

    /* Typography */
    --font-primary: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Playfair Display', Georgia, serif;
    --font-mono: 'Source Code Pro', 'SF Mono', Monaco, monospace;

    /* Colors */
    --title-color: #1f2937;
    --text-color: #374151;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg-color: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #f1f5f9;
    --border-color: #e5e7eb;
    --border-dark: #d1d5db;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --shadow-light: rgba(0, 0, 0, 0.05);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 0.75rem;
    --space-lg: 1rem;
    --space-xl: 1.25rem;
    --space-2xl: 1.5rem;
    --space-3xl: 2rem;
    --space-4xl: 2.5rem;
    --space-5xl: 3rem;
    --space-6xl: 4rem;

    /* Typography Scale */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.25s ease-in-out;
    --transition-slow: 0.35s ease-in-out;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1050;
}

/* Dark Theme Variables */
body.dark-theme {
    --primary-color: #3b82f6;
    --primary-color-light: #60a5fa;
    --accent-color: #ef4444;
    --title-color: #f9fafb;
    --text-color: #e5e7eb;
    --text-light: #d1d5db;
    --text-muted: #9ca3af;
    --bg-color: #111827;
    --bg-alt: #1f2937;
    --bg-dark: #374151;
    --border-color: #374151;
    --border-dark: #4b5563;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-light: rgba(0, 0, 0, 0.2);
}

/* === 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(--text-base);
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
    transition: all var(--transition-normal);
    overflow-x: hidden;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color-dark);
}

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

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: var(--space-sm) var(--space-lg);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-fixed);
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: var(--space-2xl);
    right: var(--space-2xl);
    font-size: var(--text-2xl);
    color: var(--primary-color);
    cursor: pointer;
    z-index: var(--z-fixed);
    background: var(--bg-color);
    padding: var(--space-md);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 12px var(--shadow-light);
    transition: all var(--transition-normal);
    border: 2px solid var(--border-color);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 6px 20px var(--shadow-color);
}

/* === Layout === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4xl);
}

@media (min-width: 1024px) {
    .container {
        grid-template-columns: 380px 1fr;
        padding: var(--space-5xl) var(--space-3xl);
    }
}

/* === Enhanced Sidebar === */
.sidebar {
    background: var(--bg-color);
    padding: var(--space-4xl);
    border-radius: var(--radius-2xl);
    box-shadow: 0 10px 40px var(--shadow-light);
    border: 1px solid var(--border-color);
    position: sticky;
    top: var(--space-3xl);
    height: fit-content;
    transition: all var(--transition-normal);
}

.sidebar:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 50px var(--shadow-color);
}

.profile-section {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.sidebar__img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto var(--space-2xl);
    border: 4px solid transparent;
    background: var(--gradient-primary);
    padding: 4px;
    transition: all var(--transition-normal);
    position: relative;
}

.sidebar__img:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 30px var(--shadow-color);
}

.sidebar__name {
    font-family: var(--font-secondary);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--title-color);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.02em;
}

.sidebar__profession {
    font-size: var(--text-lg);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.sidebar__institution {
    font-size: var(--text-sm);
    color: var(--text-light);
    font-style: italic;
}

/* Contact Info */
.sidebar__info {
    margin: var(--space-4xl) 0;
}

.info__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.info__item:hover {
    background: var(--bg-alt);
    transform: translateX(5px);
}

.info__icon {
    font-size: var(--text-xl);
    color: var(--primary-color);
    margin-top: var(--space-xs);
}

.info__title {
    font-size: var(--text-sm);
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.info__description {
    font-size: var(--text-base);
    color: var(--text-color);
    font-weight: 600;
}

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

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

/* Enhanced Scholar Metrics */
.scholar-metrics {
    margin: var(--space-4xl) 0;
    padding: var(--space-3xl);
    background: var(--gradient-bg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.metrics-title {
    font-family: var(--font-secondary);
    font-size: var(--text-xl);
    color: var(--title-color);
    text-align: center;
    margin-bottom: var(--space-3xl);
    position: relative;
}

.metrics-title::after {
    content: '';
    position: absolute;
    bottom: -var(--space-sm);
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.metric-item {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px var(--shadow-light);
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.metric-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-color);
    border-color: var(--primary-color-light);
}

.metric-item:nth-child(1) {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.metric-item:nth-child(2) {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: white;
}

.metric-item:nth-child(3) {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
}

.metric-value {
    font-family: var(--font-mono);
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.metric-label {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    opacity: 0.9;
}

.scholar-link {
    text-align: center;
}

.scholar-profile-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-2xl);
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(30, 64, 175, 0.3);
}

.scholar-profile-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
}

/* Social Links */
.sidebar__social {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    padding-top: var(--space-3xl);
    border-top: 1px solid var(--border-color);
}

.social__link {
    font-size: var(--text-2xl);
    color: var(--text-light);
    transition: all var(--transition-normal);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
}

.social__link:hover {
    color: var(--primary-color);
    background: var(--bg-alt);
    transform: translateY(-3px);
}

/* === Main Content === */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-5xl);
}

/* Section Styles */
.section {
    background: var(--bg-color);
    padding: var(--space-5xl);
    border-radius: var(--radius-2xl);
    box-shadow: 0 10px 40px var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.section:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 50px var(--shadow-color);
}

.section__title {
    font-family: var(--font-secondary);
    font-size: var(--text-3xl);
    color: var(--title-color);
    margin-bottom: var(--space-4xl);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.title__icon {
    font-size: var(--text-2xl);
    color: var(--primary-color);
    background: var(--accent-color-light);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
}

/* About Section */
.about-content {
    display: grid;
    gap: var(--space-4xl);
}

/* Enhanced Skills Constellation - Beautiful & Visible */
.skills-constellation {
    position: relative;
    width: 100%;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: var(--space-5xl) 0;
    overflow: hidden;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-color);
}

/* Orbit Rings */
.skill-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 2px dashed var(--primary-color-light);
    opacity: 0.4;
    animation: rotate-orbit 20s linear infinite;
}

.orbit-1 {
    width: 200px;
    height: 200px;
    margin: -100px 0 0 -100px;
    animation-duration: 15s;
}

.orbit-2 {
    width: 300px;
    height: 300px;
    margin: -150px 0 0 -150px;
    animation-duration: 20s;
    animation-direction: reverse;
}

.orbit-3 {
    width: 400px;
    height: 400px;
    margin: -200px 0 0 -200px;
    animation-duration: 25s;
}

.orbit-4 {
    width: 500px;
    height: 500px;
    margin: -250px 0 0 -250px;
    animation-duration: 30s;
    animation-direction: reverse;
}

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

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

/* Skill Planets */
.skill-planet {
    position: absolute;
    width: 120px;
    height: 120px;
    top: -60px;
    left: 50%;
    margin-left: -60px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: counter-rotate 20s linear infinite;
    z-index: 2;
}

.orbit-1 .skill-planet {
    background: linear-gradient(135deg, #667eea, #764ba2);
    animation-duration: 15s;
}

.orbit-2 .skill-planet {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    animation-duration: 20s;
    animation-direction: reverse;
}

.orbit-3 .skill-planet {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    animation-duration: 25s;
}

.orbit-4 .skill-planet {
    background: linear-gradient(135deg, #43e97b, #38f9d7);
    animation-duration: 30s;
    animation-direction: reverse;
}

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

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

.planet-core {
    text-align: center;
    color: white;
    z-index: 3;
}

.planet-core i {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.planet-title {
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Satellites */
.skill-satellites {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    opacity: 0;
    transition: all 0.4s ease;
    pointer-events: none;
    z-index: 1;
}

.skill-planet:hover .skill-satellites {
    opacity: 1;
    pointer-events: all;
}

.skill-planet:hover {
    transform: scale(1.15);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.satellite {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-color);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: float-satellite 3s ease-in-out infinite;
}

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

.satellite:nth-child(2) {
    top: 30%;
    right: -10px;
    animation-delay: 0.6s;
}

.satellite:nth-child(3) {
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 1.2s;
}

.satellite:nth-child(4) {
    top: 30%;
    left: -10px;
    animation-delay: 1.8s;
}

.satellite:nth-child(5) {
    top: 60%;
    right: 20%;
    animation-delay: 2.4s;
}

@keyframes float-satellite {

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

    50% {
        transform: translateY(-8px);
    }
}

@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 2fr 1fr;
    }
}

.about-text {
    font-size: var(--text-lg);
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
    text-align: justify;
}

.about-focus {
    background: var(--bg-alt);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    border-left: 4px solid var(--primary-color);
}

.focus-title {
    font-family: var(--font-secondary);
    font-size: var(--text-xl);
    color: var(--title-color);
    margin-bottom: var(--space-2xl);
}

.focus-list {
    list-style: none;
}

.focus-list li {
    position: relative;
    padding-left: var(--space-2xl);
    margin-bottom: var(--space-lg);
    color: var(--text-color);
}

.focus-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Simple & Visible Skills Constellation */
.skills-constellation {
    position: relative;
    width: 100%;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 3rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 1rem;
    border: 2px solid var(--border-color);
    overflow: hidden;
}

/* Orbit Rings - Simple & Visible */
.skill-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 2px dashed var(--primary-color);
    opacity: 0.6;
    animation: rotate-simple 20s linear infinite;
    animation: rotate-glow 20s linear infinite;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

.orbit-1 {
    width: 220px;
    height: 220px;
    animation-duration: 18s;
    border-width: 3px;
}

.orbit-2 {
    width: 320px;
    height: 320px;
    animation-duration: 24s;
    animation-direction: reverse;
    border-width: 2px;
}

.orbit-3 {
    width: 420px;
    height: 420px;
    animation-duration: 30s;
    border-width: 2px;
}

.orbit-4 {
    width: 520px;
    height: 520px;
    animation-duration: 36s;
    animation-direction: reverse;
    border-width: 1px;
}

@keyframes rotate-glow {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
    }

    50% {
        transform: translate(-50%, -50%) rotate(180deg);
        box-shadow: 0 0 30px rgba(220, 38, 38, 0.3);
    }

    100% {
        transform: translate(-50%, -50%) rotate(360deg);
        box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
    }
}

/* Enhanced Skill Planets with 3D Effects */
.skill-planet {
    position: absolute;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow:
        0 15px 35px rgba(0, 0, 0, 0.1),
        0 5px 15px rgba(0, 0, 0, 0.07),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    animation: counter-rotate-enhanced 20s linear infinite;
    top: -70px;
    left: 50%;
    transform: translateX(-50%);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.orbit-1 .skill-planet {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    animation-duration: 18s;
    box-shadow:
        0 15px 35px rgba(102, 126, 234, 0.4),
        0 5px 15px rgba(118, 75, 162, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.orbit-2 .skill-planet {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    animation-duration: 24s;
    animation-direction: reverse;
    box-shadow:
        0 15px 35px rgba(240, 147, 251, 0.4),
        0 5px 15px rgba(245, 87, 108, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.orbit-3 .skill-planet {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    animation-duration: 30s;
    box-shadow:
        0 15px 35px rgba(79, 172, 254, 0.4),
        0 5px 15px rgba(0, 242, 254, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.orbit-4 .skill-planet {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    animation-duration: 36s;
    animation-direction: reverse;
    box-shadow:
        0 15px 35px rgba(67, 233, 123, 0.4),
        0 5px 15px rgba(56, 249, 215, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

@keyframes counter-rotate-enhanced {
    0% {
        transform: translateX(-50%) rotate(0deg) scale(1);
    }

    25% {
        transform: translateX(-50%) rotate(-90deg) scale(1.02);
    }

    50% {
        transform: translateX(-50%) rotate(-180deg) scale(1);
    }

    75% {
        transform: translateX(-50%) rotate(-270deg) scale(1.02);
    }

    100% {
        transform: translateX(-50%) rotate(-360deg) scale(1);
    }
}

/* Enhanced Planet Core with Pulsing Effect */
.planet-core {
    text-align: center;
    color: white;
    z-index: 2;
    position: relative;
}

.planet-core i {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    animation: pulse-glow 2s ease-in-out infinite alternate;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
}

.planet-title {
    font-size: 0.9rem;
    font-weight: 700;
    font-family: var(--font-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

@keyframes pulse-glow {
    0% {
        transform: scale(1);
        filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
    }

    100% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.8));
    }
}

/* Enhanced Satellites with Better Animations */
.skill-satellites {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 240px;
    height: 240px;
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.skill-planet:hover .skill-satellites {
    opacity: 1;
    pointer-events: all;
    transform: translate(-50%, -50%) scale(1.1);
}

.skill-planet:hover {
    transform: translateX(-50%) scale(1.2) rotate(5deg);
    box-shadow:
        0 25px 50px rgba(0, 0, 0, 0.2),
        0 10px 25px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    z-index: 10;
    animation-play-state: paused;
}

.satellite {
    position: absolute;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
    color: var(--text-color);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    white-space: nowrap;
    box-shadow:
        0 8px 25px rgba(0, 0, 0, 0.15),
        0 3px 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: float-enhanced 4s ease-in-out infinite;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.satellite:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow:
        0 12px 35px rgba(0, 0, 0, 0.2),
        0 5px 15px rgba(0, 0, 0, 0.15);
    background: linear-gradient(135deg, var(--primary-color-light), var(--accent-color));
    color: white;
}

.satellite:nth-child(1) {
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.satellite:nth-child(2) {
    top: 25%;
    right: -20px;
    animation-delay: 0.8s;
}

.satellite:nth-child(3) {
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 1.6s;
}

.satellite:nth-child(4) {
    top: 25%;
    left: -20px;
    animation-delay: 2.4s;
}

.satellite:nth-child(5) {
    top: 65%;
    right: 15%;
    animation-delay: 3.2s;
}

@keyframes float-enhanced {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.9;
    }

    25% {
        transform: translateY(-8px) rotate(1deg);
        opacity: 1;
    }

    50% {
        transform: translateY(-12px) rotate(0deg);
        opacity: 0.95;
    }

    75% {
        transform: translateY(-8px) rotate(-1deg);
        opacity: 1;
    }
}

/* Add particle effects */
.skills-constellation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(2px 2px at 20px 30px, rgba(99, 102, 241, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(220, 38, 38, 0.3), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(79, 172, 254, 0.3), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(67, 233, 123, 0.3), transparent);
    background-repeat: repeat;
    background-size: 150px 100px;
    animation: particle-float 20s linear infinite;
    pointer-events: none;
}

@keyframes particle-float {
    0% {
        transform: translateY(0px);
    }

    100% {
        transform: translateY(-100px);
    }
}

/* Experience & Education Timeline */
.experience-timeline,
.education-timeline {
    position: relative;
    padding-left: var(--space-3xl);
}

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

.experience-item,
.education-item {
    position: relative;
    margin-bottom: var(--space-4xl);
    background: var(--bg-alt);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.experience-item::before,
.education-item::before {
    content: '';
    position: absolute;
    left: -var(--space-2xl);
    top: var(--space-2xl);
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-color);
}

.experience-item:hover,
.education-item:hover {
    transform: translateX(var(--space-sm));
    box-shadow: 0 8px 25px var(--shadow-color);
}

.experience-year,
.education-year {
    font-size: var(--text-sm);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.experience-title,
.education-degree {
    font-family: var(--font-secondary);
    font-size: var(--text-xl);
    color: var(--title-color);
    margin-bottom: var(--space-sm);
}

.experience-organization,
.education-school {
    font-size: var(--text-base);
    color: var(--text-light);
    margin-bottom: var(--space-lg);
}

.experience-badge,
.education-badge {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    background: var(--gradient-accent);
    color: white;
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.education-grade {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    display: inline-block;
    margin-top: var(--space-lg);
}

/* Enhanced Publications */
.publications__controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin-bottom: var(--space-4xl);
    padding: var(--space-2xl);
    background: var(--bg-alt);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-icon {
    position: absolute;
    left: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search__input {
    width: 100%;
    padding: var(--space-lg) var(--space-lg) var(--space-lg) var(--space-4xl);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    transition: all var(--transition-normal);
    background: var(--bg-color);
}

.search__input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.filters {
    display: flex;
    gap: var(--space-lg);
}

.filter__select {
    padding: var(--space-lg) var(--space-xl);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    background: var(--bg-color);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.filter__select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.pub-section-title {
    font-family: var(--font-secondary);
    font-size: var(--text-2xl);
    color: var(--title-color);
    margin: var(--space-4xl) 0 var(--space-2xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--primary-color-light);
    position: relative;
}

.publication-item {
    background: var(--bg-alt);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-2xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.publication-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

.publication-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--shadow-color);
    border-color: var(--primary-color-light);
}

.pub-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.pub-type {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.pub-year {
    color: var(--text-muted);
    font-weight: 600;
}

.pub-title {
    font-size: var(--text-lg);
    color: var(--title-color);
    margin-bottom: var(--space-lg);
    line-height: 1.4;
    font-weight: 600;
}

.authors {
    color: var(--text-color);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.journal {
    color: var(--text-light);
    font-style: italic;
    margin-bottom: var(--space-lg);
}

.journal a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.journal a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.pub-metrics {
    display: flex;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
}

.metric {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.conference-badge {
    background: var(--gradient-accent);
    color: white;
    padding: var(--space-xs) var(--space-lg);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    margin-top: var(--space-lg);
    display: inline-block;
}

/* Contact Section */
.contact__content {
    display: grid;
    gap: var(--space-5xl);
}

@media (min-width: 768px) {
    .contact__content {
        grid-template-columns: 1fr 1fr;
    }
}

.contact__subtitle {
    font-family: var(--font-secondary);
    font-size: var(--text-xl);
    color: var(--title-color);
    margin-bottom: var(--space-2xl);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
    padding: var(--space-lg);
    background: var(--bg-alt);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.contact__item:hover {
    transform: translateX(var(--space-sm));
    box-shadow: 0 4px 15px var(--shadow-light);
}

.contact__icon {
    font-size: var(--text-xl);
    color: var(--primary-color);
    margin-top: var(--space-xs);
}

.contact__label {
    font-size: var(--text-sm);
    color: var(--text-muted);
    font-weight: 500;
    display: block;
    margin-bottom: var(--space-xs);
}

.contact__link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-fast);
}

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

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

.social__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.social__links .social__link {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-alt);
    border-radius: var(--radius-lg);
    color: var(--text-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.social__links .social__link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(var(--space-sm));
}

/* Form Styles */
.form {
    background: var(--bg-alt);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.form__group {
    margin-bottom: var(--space-2xl);
}

.form__label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--space-sm);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--space-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    font-family: inherit;
    background: var(--bg-color);
    transition: all var(--transition-normal);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

.form__error {
    display: block;
    font-size: var(--text-sm);
    color: var(--accent-color);
    margin-top: var(--space-sm);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-2xl);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 48px;
}

.btn--primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(30, 64, 175, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
}

/* Footer */
.footer {
    margin-top: var(--space-6xl);
    padding: var(--space-4xl) 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-alt);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2xl);
}

.footer__copyright {
    color: var(--text-muted);
    font-size: var(--text-sm);
}

.footer__affiliation {
    color: var(--text-light);
    font-size: var(--text-sm);
    font-style: italic;
}

.footer__links {
    display: flex;
    gap: var(--space-xl);
}

.footer__link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--space-2xl) var(--space-lg);
        gap: var(--space-3xl);
    }

    .sidebar {
        padding: var(--space-3xl);
    }

    .section {
        padding: var(--space-3xl);
    }

    .section__title {
        font-size: var(--text-2xl);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    /* Enhanced Mobile Skills Constellation */
    .skills-constellation {
        height: 500px;
        margin: var(--space-3xl) 0;
    }

    .orbit-1 {
        width: 180px !important;
        height: 180px !important;
    }

    .orbit-2 {
        width: 240px !important;
        height: 240px !important;
    }

    .orbit-3 {
        width: 300px !important;
        height: 300px !important;
    }

    .orbit-4 {
        width: 360px !important;
        height: 360px !important;
    }

    .skill-planet {
        width: 100px !important;
        height: 100px !important;
        top: -50px;
    }

    .planet-core i {
        font-size: 1.8rem !important;
    }

    .planet-title {
        font-size: 0.7rem !important;
    }

    .skill-satellites {
        width: 180px !important;
        height: 180px !important;
    }

    .satellite {
        font-size: 0.65rem !important;
        padding: 0.3rem 0.6rem !important;
    }

    .publications__controls {
        flex-direction: column;
    }

    .filters {
        flex-direction: column;
    }

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

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

@media (max-width: 480px) {
    .skills-constellation {
        height: 400px;
    }

    .orbit-1 {
        width: 150px !important;
        height: 150px !important;
    }

    .orbit-2 {
        width: 200px !important;
        height: 200px !important;
    }

    .orbit-3 {
        width: 250px !important;
        height: 250px !important;
    }

    .orbit-4 {
        width: 300px !important;
        height: 300px !important;
    }

    .skill-planet {
        width: 80px !important;
        height: 80px !important;
        top: -40px;
    }

    .planet-core i {
        font-size: 1.5rem !important;
    }

    .planet-title {
        font-size: 0.6rem !important;
    }
}

/* Animation Classes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Mobil
e Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--space-2xl) var(--space-lg);
        gap: var(--space-3xl);
    }

    .sidebar {
        padding: var(--space-3xl);
    }

    .section {
        padding: var(--space-3xl);
    }

    .section__title {
        font-size: var(--text-2xl);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    /* Mobile Skills Constellation */
    .skills-constellation {
        height: 400px;
        margin: var(--space-3xl) 0;
    }

    .orbit-1 {
        width: 150px;
        height: 150px;
        margin: -75px 0 0 -75px;
    }

    .orbit-2 {
        width: 200px;
        height: 200px;
        margin: -100px 0 0 -100px;
    }

    .orbit-3 {
        width: 250px;
        height: 250px;
        margin: -125px 0 0 -125px;
    }

    .orbit-4 {
        width: 300px;
        height: 300px;
        margin: -150px 0 0 -150px;
    }

    .skill-planet {
        width: 80px;
        height: 80px;
        top: -40px;
        margin-left: -40px;
    }

    .planet-core i {
        font-size: 1.3rem;
    }

    .planet-title {
        font-size: 0.65rem;
    }

    .skill-satellites {
        width: 120px;
        height: 120px;
    }

    .satellite {
        font-size: 0.65rem;
        padding: 0.2rem 0.4rem;
    }

    .publications__controls {
        flex-direction: column;
    }

    .filters {
        flex-direction: column;
    }

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

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

@media (max-width: 480px) {
    .skills-constellation {
        height: 350px;
    }

    .orbit-1 {
        width: 120px;
        height: 120px;
        margin: -60px 0 0 -60px;
    }

    .orbit-2 {
        width: 160px;
        height: 160px;
        margin: -80px 0 0 -80px;
    }

    .orbit-3 {
        width: 200px;
        height: 200px;
        margin: -100px 0 0 -100px;
    }

    .orbit-4 {
        width: 240px;
        height: 240px;
        margin: -120px 0 0 -120px;
    }

    .skill-planet {
        width: 70px;
        height: 70px;
        top: -35px;
        margin-left: -35px;
    }

    .planet-core i {
        font-size: 1.1rem;
    }

    .planet-title {
        font-size: 0.6rem;
    }
}

/*
 WORKING Skills Constellation - Simple & Beautiful */
.skills-constellation {
    position: relative !important;
    width: 100% !important;
    height: 500px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    margin: 2rem 0 !important;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%) !important;
    border-radius: 1rem !important;
    border: 1px solid #cbd5e1 !important;
    overflow: visible !important;
}

.skill-orbit {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    border-radius: 50% !important;
    border: 2px dashed #3b82f6 !important;
    opacity: 0.5 !important;
    animation: spin 20s linear infinite !important;
}

.orbit-1 {
    width: 160px !important;
    height: 160px !important;
    margin-left: -80px !important;
    margin-top: -80px !important;
    animation-duration: 15s !important;
}

.orbit-2 {
    width: 220px !important;
    height: 220px !important;
    margin-left: -110px !important;
    margin-top: -110px !important;
    animation-duration: 20s !important;
    animation-direction: reverse !important;
}

.orbit-3 {
    width: 280px !important;
    height: 280px !important;
    margin-left: -140px !important;
    margin-top: -140px !important;
    animation-duration: 25s !important;
}

.orbit-4 {
    width: 340px !important;
    height: 340px !important;
    margin-left: -170px !important;
    margin-top: -170px !important;
    animation-duration: 30s !important;
    animation-direction: reverse !important;
}

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

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

.skill-planet {
    position: absolute !important;
    width: 100px !important;
    height: 100px !important;
    top: -50px !important;
    left: 50% !important;
    margin-left: -50px !important;
    border-radius: 50% !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    cursor: pointer !important;
    transition: all 0.3s ease !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2) !important;
    animation: counter-spin 20s linear infinite !important;
    z-index: 5 !important;
}

.orbit-1 .skill-planet {
    background: linear-gradient(135deg, #667eea, #764ba2) !important;
    animation-duration: 15s !important;
}

.orbit-2 .skill-planet {
    background: linear-gradient(135deg, #f093fb, #f5576c) !important;
    animation-duration: 20s !important;
    animation-direction: reverse !important;
}

.orbit-3 .skill-planet {
    background: linear-gradient(135deg, #4facfe, #00f2fe) !important;
    animation-duration: 25s !important;
}

.orbit-4 .skill-planet {
    background: linear-gradient(135deg, #43e97b, #38f9d7) !important;
    animation-duration: 30s !important;
    animation-direction: reverse !important;
}

@keyframes counter-spin {
    from {
        transform: rotate(0deg);
    }

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

.planet-core {
    text-align: center !important;
    color: white !important;
    z-index: 10 !important;
}

.planet-core i {
    font-size: 1.8rem !important;
    margin-bottom: 0.3rem !important;
    display: block !important;
}

.planet-title {
    font-size: 0.7rem !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.5px !important;
}

.skill-satellites {
    position: absolute !important;
    top: 50% !important;
    left: 50% !important;
    transform: translate(-50%, -50%) !important;
    width: 160px !important;
    height: 160px !important;
    opacity: 0 !important;
    transition: all 0.3s ease !important;
    pointer-events: none !important;
    z-index: 3 !important;
}

.skill-planet:hover .skill-satellites {
    opacity: 1 !important;
    pointer-events: all !important;
}

.skill-planet:hover {
    transform: scale(1.2) !important;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3) !important;
    z-index: 15 !important;
}

.satellite {
    position: absolute !important;
    background: rgba(255, 255, 255, 0.95) !important;
    color: #374151 !important;
    padding: 0.3rem 0.6rem !important;
    border-radius: 15px !important;
    font-size: 0.65rem !important;
    font-weight: 600 !important;
    white-space: nowrap !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2) !important;
    border: 1px solid rgba(255, 255, 255, 0.5) !important;
    animation: float-up 2s ease-in-out infinite !important;
}

.satellite:nth-child(1) {
    top: -8px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
}

.satellite:nth-child(2) {
    top: 25% !important;
    right: -8px !important;
    animation-delay: 0.4s !important;
}

.satellite:nth-child(3) {
    bottom: -8px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    animation-delay: 0.8s !important;
}

.satellite:nth-child(4) {
    top: 25% !important;
    left: -8px !important;
    animation-delay: 1.2s !important;
}

.satellite:nth-child(5) {
    top: 60% !important;
    right: 15% !important;
    animation-delay: 1.6s !important;
}

@keyframes float-up {

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

    50% {
        transform: translateY(-5px);
    }
}