/* ==========================================
   CSS Custom Properties (Variables)
   ========================================== */
:root {
    /* Colors - Light Mode */
    --color-bg: #f8fafc;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f1f5f9;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #94a3b8;
    --color-primary: #0ea5e9;
    --color-primary-light: #38bdf8;
    --color-primary-dark: #0284c7;
    --color-accent: #14b8a6;
    --color-accent-light: #2dd4bf;
    --color-success: #10b981;
    --color-border: #e2e8f0;
    --color-card: #ffffff;
    --color-card-hover: #f0f9ff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #14b8a6 100%);
    --gradient-secondary: linear-gradient(135deg, #38bdf8 0%, #2dd4bf 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: '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: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Z-Index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
}

/* Dark Mode */
[data-theme="dark"] {
    --color-bg: #0c1222;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #0f172a;
    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-border: #334155;
    --color-card: #1e293b;
    --color-card-hover: #263548;
    --gradient-bg: linear-gradient(135deg, #0c1222 0%, #1e293b 100%);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.25);
}

/* ==========================================
   Reset & Base Styles
   ========================================== */
*, *::before, *::after {
    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(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

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

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

ul, ol {
    list-style: none;
}

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

/* ==========================================
   Utility Classes
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section {
    padding: var(--spacing-4xl) 0;
    position: relative;
}

/* ==========================================
   Custom Cursor
   ========================================== */
.cursor, .cursor-follower {
    display: none;
}

@media (pointer: fine) {
    .cursor {
        display: block;
        width: 8px;
        height: 8px;
        background: var(--color-primary);
        border-radius: 50%;
        position: fixed;
        pointer-events: none;
        z-index: var(--z-tooltip);
        transform: translate(-50%, -50%);
        transition: transform 0.1s ease, opacity 0.1s ease;
    }
    
    .cursor-follower {
        display: block;
        width: 35px;
        height: 35px;
        border: 1.5px solid var(--color-primary);
        border-radius: 50%;
        position: fixed;
        pointer-events: none;
        z-index: var(--z-tooltip);
        transform: translate(-50%, -50%);
        transition: transform 0.15s ease, opacity 0.15s ease, width 0.2s ease, height 0.2s ease;
        opacity: 0.5;
    }
    
    .cursor.active {
        transform: translate(-50%, -50%) scale(0.5);
    }
    
    .cursor-follower.active {
        width: 50px;
        height: 50px;
        opacity: 0.3;
    }
}

/* ==========================================
   Navigation
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(250, 250, 250, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 15, 26, 0.8);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-text {
    font-family: var(--font-display);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    padding: var(--spacing-sm) 0;
}

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

.nav-links a:hover {
    color: var(--color-text);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

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

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

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 30px;
    height: 30px;
    justify-content: center;
    z-index: var(--z-modal);
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition-base);
    transform-origin: center;
}

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

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

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

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--color-bg);
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: right var(--transition-slow);
}

.mobile-menu.active {
    right: 0;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.mobile-nav-links a {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-text);
}

.mobile-nav-footer {
    margin-top: var(--spacing-2xl);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(99, 102, 241, 0.3);
}

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

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

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

.btn i {
    transition: transform var(--transition-base);
}

.btn:hover i {
    transform: translateX(4px);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 70px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--color-primary);
    top: -200px;
    right: -200px;
    opacity: 0.15;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: -100px;
    left: -100px;
    opacity: 0.15;
    animation-delay: -4s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--color-primary-light);
    top: 50%;
    left: 50%;
    opacity: 0.1;
    animation-delay: -2s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.05); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    width: 100%;
}

.hero-intro {
    z-index: 1;
}

.greeting {
    display: inline-block;
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, var(--font-size-6xl));
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
}

.title-line {
    display: block;
    animation: slideInUp 0.6s ease forwards;
    opacity: 0;
}

.title-line:nth-child(1) { animation-delay: 0.1s; }
.title-line:nth-child(2) { animation-delay: 0.2s; }

.title-line.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 500px;
    margin-bottom: var(--spacing-xl);
}

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

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    animation: slideInUp 0.6s ease forwards;
    animation-delay: 0.5s;
    opacity: 0;
}

.hero-social {
    display: flex;
    gap: var(--spacing-md);
    animation: slideInUp 0.6s ease forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

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

.social-link {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

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

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease forwards;
    animation-delay: 0.3s;
    opacity: 0;
}

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

.profile-card {
    position: relative;
    width: 350px;
    height: 350px;
}

.profile-image {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    width: 280px;
    height: 280px;
    border-radius: var(--radius-2xl);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 800;
    color: white;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-2xl);
}

.profile-ring {
    position: absolute;
    width: 320px;
    height: 320px;
    border: 2px dashed var(--color-primary);
    border-radius: var(--radius-2xl);
    animation: rotate 20s linear infinite;
    opacity: 0.3;
}

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

.floating-badges {
    position: absolute;
    inset: 0;
}

.badge {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    background: var(--color-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    animation: floatBadge 3s ease-in-out infinite;
}

.badge-1 { top: 0; left: 20%; animation-delay: 0s; }
.badge-2 { top: 30%; right: 0; animation-delay: -0.5s; }
.badge-3 { bottom: 0; right: 20%; animation-delay: -1s; }
.badge-4 { bottom: 30%; left: 0; animation-delay: -1.5s; }

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    animation: fadeIn 1s ease forwards, bounce 2s ease-in-out infinite;
    animation-delay: 1s, 2s;
    opacity: 0;
}

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

/* ==========================================
   Section Headers
   ========================================== */
.section-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.section-header.center {
    justify-content: center;
    flex-direction: column;
    text-align: center;
}

.section-number {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, var(--font-size-3xl));
    font-weight: 700;
    color: var(--color-text);
}

.section-line {
    flex: 1;
    max-width: 300px;
    height: 1px;
    background: var(--color-border);
}

.section-header.center .section-line {
    width: 100px;
    margin-top: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: var(--spacing-2xl);
}

/* ==========================================
   About Section
   ========================================== */
.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.about-text .lead {
    font-size: var(--font-size-xl);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-lg);
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-2xl);
    border-top: 1px solid var(--color-border);
}

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.about-image {
    display: flex;
    justify-content: center;
}

.image-frame {
    position: relative;
    width: 300px;
    height: 350px;
}

.image-frame .image-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    position: relative;
    z-index: 2;
}

.frame-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-xl);
    top: 20px;
    left: 20px;
    z-index: 1;
}

/* ==========================================
   Experience Section
   ========================================== */
.timeline {
    position: relative;
    padding-left: var(--spacing-3xl);
}

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

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-2xl);
}

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

.timeline-marker {
    position: absolute;
    left: calc(-1 * var(--spacing-3xl) - 20px);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.timeline-date {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.timeline-title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.timeline-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.timeline-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* ==========================================
   Projects Section
   ========================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

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

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

.project-card.featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.project-image {
    position: relative;
    background: var(--gradient-primary);
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.project-placeholder {
    font-size: 4rem;
    color: white;
    opacity: 0.8;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
    transform: translateY(20px);
}

.project-card:hover .project-link {
    transform: translateY(0);
}

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

.project-content {
    padding: var(--spacing-xl);
}

.project-category {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.project-title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.project-tech span {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.projects-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* ==========================================
   Skills Section
   ========================================== */
.skills-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.skills-category {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
}

.category-title {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

.category-title i {
    color: var(--color-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.skill-item {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: var(--color-bg-tertiary);
    transition: all var(--transition-base);
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    color: white;
}

.skill-name {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

.skill-level::after {
    content: '';
    display: block;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 1s ease;
}

.skill-item:hover .skill-level::after,
.skill-level.animated::after {
    width: var(--skill-level, 0%);
}

/* ==========================================
   Contact Section
   ========================================== */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-lead {
    font-size: var(--font-size-xl);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.contact-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

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

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

.contact-info {
    flex: 1;
    text-align: left;
}

.contact-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

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

.contact-arrow {
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

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

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo-text {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--color-text-secondary);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: var(--spacing-3xl);
    justify-content: flex-end;
}

.footer-column h4 {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-column a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-credit i {
    color: var(--color-accent);
}

/* ==========================================
   Education Section
   ========================================== */
.edu-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.edu-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

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

.edu-card-primary {
    border-color: rgba(14, 165, 233, 0.4);
    background: linear-gradient(135deg, var(--color-card) 0%, var(--color-card-hover) 100%);
}

.edu-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.edu-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.edu-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.edu-date {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.edu-location {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.edu-institution {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
}

.edu-degree {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.edu-gpa {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-primary);
}

.edu-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.65;
    flex: 1;
}

.edu-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: auto;
    padding-top: var(--spacing-md);
}

.tag-accent {
    background: var(--gradient-primary);
    color: white !important;
}

/* ==========================================
   Timeline Updates — Experience
   ========================================== */
.timeline-header {
    margin-bottom: var(--spacing-md);
}

.timeline-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.timeline-bullets li {
    position: relative;
    padding-left: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.timeline-bullets li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: var(--font-size-xs);
    top: 3px;
}

/* ==========================================
   Project Cards — Header & External Links
   ========================================== */
.project-card--accent {
    border-color: rgba(14, 165, 233, 0.4);
    background: linear-gradient(135deg, var(--color-card) 0%, var(--color-card-hover) 100%);
}

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

.project-ext-links {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.project-ext-link {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    font-size: 0.7rem;
    transition: all var(--transition-fast);
    border: 1px solid var(--color-border);
}

.project-ext-link:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background: rgba(14, 165, 233, 0.08);
}

/* ==========================================
   Awards & Leadership Section
   ========================================== */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.award-card {
    background: var(--color-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.award-card--featured {
    border-color: rgba(14, 165, 233, 0.4);
    background: linear-gradient(135deg, var(--color-card) 0%, var(--color-card-hover) 100%);
}

.award-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.award-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.award-date {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.award-title {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.4;
}

.award-org {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.award-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ==========================================
   Certifications
   ========================================== */
.certs-subsection {
    margin-top: var(--spacing-2xl);
}

.subsection-title {
    font-family: var(--font-display);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.certs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.cert-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    text-decoration: none;
}

.cert-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.cert-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.cert-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cert-title {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text);
}

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

.cert-link {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition-fast);
}

.cert-card:hover .cert-link {
    gap: 6px;
}

/* ==========================================
   Skills — Pill Layout (replaces bar layout)
   ========================================== */
.skills-content {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.skill-group {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    transition: background var(--transition-fast);
}

.skill-group:last-child {
    border-bottom: none;
}

.skill-group:hover {
    background: var(--color-bg-tertiary);
}

.skill-group-label {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.skill-group-label i {
    color: var(--color-primary);
    width: 16px;
    text-align: center;
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-pill {
    padding: 5px var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    cursor: default;
}

.skill-pill:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.25);
}

/* Stat sub text */
.stat-sub {
    font-size: 1.4rem;
    font-weight: 600;
}

/* ==========================================
   Responsive Styles
   ========================================== */
@media (max-width: 1024px) {
    .edu-grid {
        grid-template-columns: 1fr;
    }

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

    .skill-group {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-intro {
        order: 1;
    }
    
    .hero-visual {
        order: 0;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .about-image {
        order: -1;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card.featured {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .footer-brand p {
        margin: 0 auto;
    }
}

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

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

    .nav-links, .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .section {
        padding: var(--spacing-3xl) 0;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .timeline {
        padding-left: var(--spacing-2xl);
    }
    
    .timeline-marker {
        left: calc(-1 * var(--spacing-2xl) - 15px);
        width: 30px;
        height: 30px;
        font-size: var(--font-size-sm);
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .profile-card {
        width: 280px;
        height: 280px;
    }
    
    .image-placeholder {
        width: 220px;
        height: 220px;
        font-size: 3.5rem;
    }
    
    .profile-ring {
        width: 260px;
        height: 260px;
    }
    
    .badge {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
    
    .image-frame {
        width: 250px;
        height: 300px;
    }
    
    .skill-item {
        padding: var(--spacing-md);
    }
    
    .skill-icon {
        width: 50px;
        height: 50px;
        font-size: var(--font-size-xl);
    }
}

/* ==========================================
   Project Title Link + Tagline
   ========================================== */
.project-title-link {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.project-tagline {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-sm);
    margin-top: -4px;
}

/* ==========================================
   Profile Photo (replaces PG initials)
   ========================================== */
.profile-photo {
    width: 280px;
    height: 280px;
    border-radius: var(--radius-2xl);
    object-fit: cover;
    object-position: top center;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-2xl);
    display: block;
}

@media (max-width: 768px) {
    .profile-photo {
        width: 220px;
        height: 220px;
    }
}

@media (max-width: 480px) {
    .profile-photo {
        width: 190px;
        height: 190px;
    }
}

/* ==========================================
   Hero Meta (location + university icons)
   ========================================== */
.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.hero-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    padding: 4px 14px;
    transition: all var(--transition-base);
}

.hero-meta-item i {
    color: var(--color-primary);
    font-size: 0.75rem;
}

/* ==========================================
   Resume Button — Stand-out styling
   ========================================== */
.btn-resume {
    box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4), var(--shadow-md);
    animation: resumePulse 2.5s ease-in-out infinite;
    letter-spacing: 0.03em;
}

.btn-resume:hover {
    animation: none;
    box-shadow: var(--shadow-lg), 0 0 24px rgba(14, 165, 233, 0.5);
}

@keyframes resumePulse {
    0%   { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4), var(--shadow-md); }
    50%  { box-shadow: 0 0 0 7px rgba(14, 165, 233, 0.0), var(--shadow-md); }
    100% { box-shadow: 0 0 0 0 rgba(14, 165, 233, 0.4), var(--shadow-md); }
}

/* ==========================================
   Inline link (About section)
   ========================================== */
.inline-link {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

/* ==========================================
   Mobile-first Improvements
   ========================================== */
@media (max-width: 768px) {
    /* Hero */
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        gap: var(--spacing-xl);
        padding-top: 100px;
        padding-bottom: var(--spacing-2xl);
    }

    .hero-intro {
        max-width: 100%;
    }

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

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

    .hero-cta {
        justify-content: center;
        flex-wrap: wrap;
    }

    /* About stats — stack on mobile */
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* Experience timeline */
    .timeline-item {
        padding-left: var(--spacing-xl);
    }

    /* Section header */
    .section-header {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    /* Contact methods */
    .contact-methods {
        gap: var(--spacing-sm);
    }

    /* Contact card value — ellipsis on small screens */
    .contact-value {
        font-size: var(--font-size-xs);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 160px;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-xl);
    }

    /* Subsection title */
    .subsection-title {
        text-align: center;
    }

    /* Project cards full width */
    .projects-grid {
        grid-template-columns: 1fr;
    }

    /* Certs grid */
    .certs-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    /* Hero title shrink */
    .title-line {
        font-size: clamp(2.2rem, 10vw, 3rem);
    }

    /* Hero roles — shrink on tiny screens */
    .hero-roles {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .hero-role-sep {
        display: none;
    }

    /* Floating badges — hide on tiny screens */
    .floating-badges {
        display: none;
    }

    /* Profile card shrink */
    .profile-card {
        width: 220px;
        height: 220px;
    }

    /* Nav */
    .navbar .logo-text {
        font-size: var(--font-size-lg);
    }

    /* Skills pills wrap properly */
    .skill-pills {
        gap: var(--spacing-xs);
    }

    .skill-pill {
        font-size: 0.72rem;
        padding: 4px 10px;
    }

    /* Award cards stack */
    .awards-grid {
        grid-template-columns: 1fr;
    }

    /* Edu grid stack */
    .edu-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================
   Hero Roles — static pill display
   ========================================== */
.hero-roles {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 12px;
    margin-bottom: var(--spacing-md);
    animation: slideInUp 0.6s ease forwards;
    animation-delay: 0.3s;
    opacity: 0;
}

.hero-role {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-primary);
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.25);
    border-radius: var(--radius-full);
    padding: 5px 14px;
    letter-spacing: 0.01em;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.hero-role i {
    font-size: 0.8rem;
    opacity: 0.85;
}

.hero-role:hover {
    background: rgba(14, 165, 233, 0.18);
    border-color: rgba(14, 165, 233, 0.5);
    transform: translateY(-1px);
}

.hero-role-sep {
    color: var(--color-text-muted);
    font-size: var(--font-size-lg);
    font-weight: 300;
    line-height: 1;
    user-select: none;
}

@media (max-width: 600px) {
    .hero-roles {
        gap: 6px;
    }

    .hero-role {
        font-size: var(--font-size-sm);
        padding: 4px 11px;
    }

    .hero-role-sep {
        display: none;
    }
}

/* ==========================================
   Scroll To Top Button
   ========================================== */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: var(--shadow-lg), 0 0 20px rgba(14, 165, 233, 0.3);
    opacity: 0;
    transform: translateY(16px) scale(0.85);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease, box-shadow 0.2s ease;
    z-index: var(--z-fixed);
}

.scroll-to-top.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.scroll-to-top:hover {
    box-shadow: var(--shadow-xl), 0 0 30px rgba(14, 165, 233, 0.5);
    transform: translateY(-3px) scale(1.07);
}

.scroll-to-top:active {
    transform: translateY(0) scale(0.97);
}

@media (max-width: 480px) {
    .scroll-to-top {
        bottom: 1.25rem;
        right: 1.25rem;
        width: 40px;
        height: 40px;
    }
}

/* ==========================================
   Theme toggle — removed from UI
   ========================================== */
.theme-toggle {
    display: none !important;
}

/* ==========================================
   UoA & BSc — linked text with slide underline
   ========================================== */
.uoa-link,
.bsc-link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    background-image: linear-gradient(var(--color-primary-light), var(--color-primary-light));
    background-position: left bottom;
    background-repeat: no-repeat;
    background-size: 0% 2px;
    transition: background-size 0.3s ease, color 0.2s ease;
    padding-bottom: 1px;
}

.uoa-link:hover,
.bsc-link:hover {
    color: var(--color-primary-light);
    background-size: 100% 2px;
}

/* hero-meta UoA link — inherits pill styling, override color */
.hero-meta-item .uoa-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    background-image: linear-gradient(var(--color-primary), var(--color-primary));
}

.hero-meta-item .uoa-link:hover {
    color: var(--color-primary);
    background-size: 100% 2px;
}

/* ==========================================
   About Intro paragraph
   ========================================== */
.about-intro {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.75;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-left: 3px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}