/* ============================================
   Premium Portfolio Design - Polished & Modern
   ============================================ */

:root {
    /* Light Theme Colors - Enhanced */
    --bg-primary: #f8faf9;
    --bg-secondary: #f1f5f2;
    --bg-card: #ffffff;
    --text-primary: #1a2a2a;
    --text-secondary: #3a5a5a;
    --text-muted: #5a7a7a;
    --accent-primary: #5a8a8a;
    --accent-secondary: #4a7a7e;
    --accent-hover: #6b9a9a;
    --border-primary: #d4dcd8;
    --border-light: #e8ede9;

    /* Enhanced Shadows */
    --shadow-sm: 0 2px 8px rgba(90, 138, 138, 0.08);
    --shadow-md: 0 4px 20px rgba(90, 138, 138, 0.12);
    --shadow-lg: 0 8px 40px rgba(90, 138, 138, 0.16);
    --shadow-xl: 0 16px 60px rgba(90, 138, 138, 0.20);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);

    /* Dark Theme Colors - Enhanced */
    --dark-bg-primary: #0a0f0f;
    --dark-bg-secondary: #1a1f1f;
    --dark-bg-card: #1f2525;
    --dark-text-primary: #f0f5f5;
    --dark-text-secondary: #d0d5d5;
    --dark-text-muted: #a0a5a5;
    --dark-text-accent: #7a9a9a;
    --dark-border-primary: #3a3f3f;
    --dark-border-light: #2a2f2f;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Dark Theme Base */
body.dark-theme {
    background-color: var(--dark-bg-primary);
    color: var(--dark-text-primary);
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-primary);
    color: white;
    padding: 12px 20px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 0 0 var(--radius-md) 0;
    font-weight: 600;
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: 0;
}

/* Navigation - Enhanced */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(248, 250, 249, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: all var(--transition-base);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo a {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-base);
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo a:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(90, 138, 138, 0.1), rgba(74, 122, 126, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
    border-radius: var(--radius-md);
}

.nav-link:hover::before,
.nav-link.active::before {
    opacity: 1;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    transform: translateY(-1px);
}

.nav-link.active {
    font-weight: 700;
}

/* Hamburger Menu - Enhanced */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
    position: relative;
    border-radius: var(--radius-md);
    transition: background var(--transition-base);
}

.hamburger:hover {
    background: rgba(90, 138, 138, 0.1);
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text-primary);
    margin: 3.5px 0;
    transition: all var(--transition-base);
    border-radius: 2px;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-secondary);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        transition: left var(--transition-base);
        box-shadow: var(--shadow-xl);
        z-index: 999;
        overflow-y: auto;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        width: 100%;
        padding: var(--spacing-sm);
        font-size: 1.1rem;
        border-radius: var(--radius-md);
    }
}

/* Dark Theme Navigation */
body.dark-theme .navbar {
    background: rgba(26, 31, 31, 0.95);
    border-bottom-color: var(--dark-border-primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

body.dark-theme .nav-logo a {
    background: linear-gradient(135deg, var(--dark-text-accent), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-theme .nav-link {
    color: var(--dark-text-secondary);
}

body.dark-theme .nav-link::before {
    background: linear-gradient(135deg, rgba(128, 154, 154, 0.15), rgba(90, 138, 138, 0.1));
}

body.dark-theme .nav-link:hover,
body.dark-theme .nav-link.active {
    color: var(--dark-text-primary);
}

body.dark-theme .hamburger span {
    background: var(--dark-text-primary);
}

body.dark-theme .hamburger:hover {
    background: rgba(128, 154, 154, 0.15);
}

body.dark-theme .nav-menu {
    background: var(--dark-bg-secondary);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Hero Section - Enhanced */
.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    background: linear-gradient(-45deg, #f8faf9, #e8ede9, #d4dcd8, #f1f5f2);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

body.dark-theme .hero {
    background: linear-gradient(-45deg, #0a0f0f, #1a1f1f, #1f2525, #0f1515);
    background-size: 400% 400%;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(at 40% 20%, hsla(180, 22%, 45%, 0.1) 0px, transparent 50%),
        radial-gradient(at 80% 0%, hsla(175, 26%, 39%, 0.1) 0px, transparent 50%),
        radial-gradient(at 0% 50%, hsla(180, 22%, 45%, 0.1) 0px, transparent 50%);
    filter: blur(40px);
    z-index: 0;
    animation: float 20s infinite alternate;
}

@keyframes float {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }

    100% {
        transform: translate(20px, 20px) rotate(5deg);
    }
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out;
}

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

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

.profile-image {
    margin-bottom: var(--spacing-md);
    position: relative;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.profile-image::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    opacity: 0.2;
    z-index: -1;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.2;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.3;
    }
}

.profile-img {
    width: 240px;
    height: 240px;
    border-radius: 50%;
    object-fit: cover;
    border: 6px solid var(--bg-card);
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-slow);
    position: relative;
    z-index: 1;
}

.profile-img:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: var(--shadow-xl), 0 0 40px rgba(90, 138, 138, 0.3);
}

.hero-name {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.03em;
    line-height: 1.1;
    animation: fadeInUp 0.8s ease-out 0.4s both;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-greeting {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    margin-top: var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

/* Buttons - Enhanced */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2.25rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(90, 138, 138, 0.4);
    background: linear-gradient(135deg, var(--accent-hover), var(--accent-primary));
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-primary);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--bg-primary);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(-1px);
}

/* Dark Theme Buttons */
body.dark-theme .btn-primary {
    background: linear-gradient(135deg, var(--dark-text-accent), var(--accent-primary));
    color: var(--dark-bg-primary);
}

body.dark-theme .btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-hover));
    color: white;
}

body.dark-theme .btn-secondary {
    background: var(--dark-bg-card);
    color: var(--dark-text-primary);
    border-color: var(--dark-border-primary);
}

body.dark-theme .btn-secondary:hover {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-text-accent);
    color: var(--dark-text-accent);
}

body.dark-theme .btn-outline {
    color: var(--dark-text-accent);
    border-color: var(--dark-text-accent);
}

body.dark-theme .btn-outline:hover {
    background: var(--dark-text-accent);
    color: var(--dark-bg-primary);
}

/* Quick Introduction - Enhanced */
.quick-intro {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-secondary);
    position: relative;
}

.intro-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.9;
    text-align: center;
    max-width: 850px;
    margin: 0 auto var(--spacing-xl);
    font-weight: 400;
}

.quick-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    min-width: 120px;
}

.stat:hover {
    transform: translateY(-5px);
    background: var(--bg-card);
    box-shadow: var(--shadow-md);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* Dark Theme Stats */
body.dark-theme .stat:hover {
    background: var(--dark-bg-card);
}

body.dark-theme .stat-number {
    background: linear-gradient(135deg, var(--dark-text-accent), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-theme .stat-label {
    color: var(--dark-text-muted);
}

/* Dark Theme Quick Intro */
body.dark-theme .quick-intro {
    background: var(--dark-bg-secondary);
}

body.dark-theme .intro-text {
    color: var(--dark-text-secondary);
}


/* Featured Projects - Enhanced */
.featured-projects {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-primary);
    position: relative;
}

body.dark-theme .featured-projects {
    background: var(--dark-bg-primary);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    letter-spacing: -0.02em;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-full);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.featured-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
    position: relative;
}

.featured-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.featured-card:hover::before {
    transform: scaleX(1);
}

.featured-card:hover {
    transform: translateY(-10px) scale(1.01);
    box-shadow: var(--shadow-xl), 0 10px 40px rgba(90, 138, 138, 0.15);
    border-color: var(--accent-primary);
    z-index: 10;
}

.featured-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
    position: relative;
}

.featured-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.1));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.featured-card:hover .featured-image::after {
    opacity: 1;
}

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

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

.featured-content {
    padding: var(--spacing-lg);
}

.featured-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.featured-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.featured-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.featured-link:hover {
    color: var(--accent-secondary);
    gap: 0.75rem;
}

.featured-link::after {
    content: '';
    position: absolute;
    right: -1.5rem;
    width: 0;
    height: 2px;
    background: var(--accent-secondary);
    transition: width var(--transition-base);
}

.featured-link:hover::after {
    width: 1rem;
}

.featured-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.featured-link:hover {
    gap: 0.75rem;
}

.view-all {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* Dark Theme Projects */
body.dark-theme .featured-card {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
}

body.dark-theme .featured-card:hover {
    border-color: var(--dark-text-accent);
}

body.dark-theme .featured-title {
    color: var(--dark-text-primary);
}

body.dark-theme .featured-description {
    color: var(--dark-text-secondary);
}

body.dark-theme .featured-link {
    color: var(--dark-text-accent);
}

body.dark-theme .featured-link:hover {
    color: var(--accent-primary);
}

body.dark-theme .section-title {
    color: var(--dark-text-primary);
}

/* Skills Preview - Enhanced */
.skills-preview {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-secondary);
    position: relative;
}

body.dark-theme .skills-preview {
    background: var(--dark-bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.skill-category {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(90, 138, 138, 0.05), rgba(74, 122, 126, 0.05));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.skill-category:hover::before {
    opacity: 1;
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.skill-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 1.75rem;
    color: white;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.skill-category:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.skill-category h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.skill-list {
    list-style: none;
    position: relative;
    z-index: 1;
}

.skill-list li {
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    font-size: 0.95rem;
    transition: all var(--transition-base);
    position: relative;
    padding-left: 1.5rem;
}

.skill-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-size: 0.8rem;
    transition: transform var(--transition-base);
}

.skill-category:hover .skill-list li::before {
    transform: translateX(5px);
}

.skill-category:hover .skill-list li {
    color: var(--text-primary);
    padding-left: 1.75rem;
}

/* Dark Theme Skills */
body.dark-theme .skill-category {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
}

body.dark-theme .skill-category:hover {
    border-color: var(--dark-text-accent);
}

body.dark-theme .skill-icon {
    background: linear-gradient(135deg, var(--dark-text-accent), var(--accent-primary));
}

body.dark-theme .skill-category h3 {
    color: var(--dark-text-primary);
}

body.dark-theme .skill-list li {
    color: var(--dark-text-secondary);
}

body.dark-theme .skill-category:hover .skill-list li {
    color: var(--dark-text-primary);
}

/* Footer - Enhanced */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
}

.footer-info h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.footer-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.social-link {
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-base);
    font-size: 1.2rem;
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--accent-primary);
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
}

.social-link:hover::before {
    width: 100%;
    height: 100%;
}

.social-link i {
    position: relative;
    z-index: 1;
    transition: color var(--transition-base);
}

.social-link:hover {
    border-color: var(--accent-primary);
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-md);
}

.social-link:hover i {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Dark Theme Footer */
body.dark-theme .footer {
    background: var(--dark-bg-secondary);
    border-top-color: var(--dark-border-primary);
}

body.dark-theme .footer-content {
    border-bottom-color: var(--dark-border-primary);
}

body.dark-theme .footer-info h3 {
    color: var(--dark-text-primary);
}

body.dark-theme .footer-info p {
    color: var(--dark-text-secondary);
}

body.dark-theme .social-link {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
    color: var(--dark-text-primary);
}

body.dark-theme .social-link::before {
    background: var(--dark-text-accent);
}

body.dark-theme .social-link:hover {
    border-color: var(--dark-text-accent);
}

body.dark-theme .footer-bottom p {
    color: var(--dark-text-muted);
}

/* Theme Toggle - Enhanced - Better Position */
.theme-toggle {
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 56px;
    height: 56px;
    background: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    z-index: 500;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    overflow: hidden;
    position: fixed;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: var(--accent-primary);
    transform: translate(-50%, -50%);
    transition: width var(--transition-base), height var(--transition-base);
}

.theme-toggle:hover::before {
    width: 100%;
    height: 100%;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: all var(--transition-base);
    z-index: 1;
}

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

.moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

body.dark-theme .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

body.dark-theme .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

body.dark-theme .theme-toggle {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
}

body.dark-theme .theme-toggle::before {
    background: var(--dark-text-accent);
}

/* Email Display - Bottom Left Corner */
.email-display {
    position: fixed;
    left: 0;
    bottom: var(--spacing-lg);
    transform: rotate(-90deg);
    transform-origin: left bottom;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    z-index: 500;
    box-shadow: var(--shadow-md);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    white-space: nowrap;
    pointer-events: auto;
    /* Position rotated text at bottom left corner */
    margin-left: -80px;
    margin-bottom: -80px;
}

body.dark-theme .email-display {
    background: linear-gradient(135deg, var(--dark-text-accent), var(--accent-primary));
}

/* About Page Styles - Enhanced */
.about-hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    margin-top: 80px;
    position: relative;
}

.personal-intro {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-primary);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.intro-text h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.intro-text p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.intro-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-slow);
}

.intro-image:hover img {
    transform: scale(1.02);
}

.skills-expertise {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-secondary);
}

/* Dark Theme Hero - Already defined above, removing duplicate */

body.dark-theme .hero-name {
    background: linear-gradient(135deg, var(--dark-text-primary), var(--dark-text-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-theme .hero-greeting {
    color: var(--dark-text-secondary);
}

body.dark-theme .profile-img {
    border-color: var(--dark-bg-card);
}

body.dark-theme .about-hero {
    background: linear-gradient(135deg, var(--dark-bg-primary) 0%, var(--dark-bg-secondary) 50%, var(--dark-bg-primary) 100%);
}

body.dark-theme .personal-intro {
    background: var(--dark-bg-primary);
}

body.dark-theme .intro-text h2 {
    color: var(--dark-text-primary);
}

body.dark-theme .intro-text p {
    color: var(--dark-text-secondary);
}

body.dark-theme .skills-expertise {
    background: var(--dark-bg-secondary);
}

body.dark-theme .intro-text {
    color: var(--dark-text-secondary);
}

/* Contact Page Dark Theme */
body.dark-theme .contact-hero {
    background: linear-gradient(135deg, var(--dark-bg-primary) 0%, var(--dark-bg-secondary) 100%);
}

body.dark-theme .contact-content {
    background: var(--dark-bg-primary);
}

body.dark-theme .form-container,
body.dark-theme .info-container {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
}

body.dark-theme .form-label {
    color: var(--dark-text-secondary);
}

body.dark-theme .form-input,
body.dark-theme .form-textarea {
    background: var(--dark-bg-secondary);
    border-color: var(--dark-border-primary);
    color: var(--dark-text-primary);
}

body.dark-theme .form-input:focus,
body.dark-theme .form-textarea:focus {
    border-color: var(--dark-text-accent);
    box-shadow: 0 0 0 3px rgba(128, 154, 154, 0.1);
}

body.dark-theme .form-input::placeholder,
body.dark-theme .form-textarea::placeholder {
    color: var(--dark-text-muted);
}

body.dark-theme .contact-text h3 {
    color: var(--dark-text-primary);
}

body.dark-theme .contact-text p {
    color: var(--dark-text-secondary);
}

body.dark-theme .contact-icon {
    background: linear-gradient(135deg, var(--dark-text-accent), var(--accent-primary));
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-sm);
        height: 70px;
    }

    .hero {
        min-height: 100dvh;
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .profile-img {
        width: 180px;
        height: 180px;
    }

    .featured-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

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

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .theme-toggle {
        width: 52px;
        height: 52px;
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        font-size: 1.3rem;
    }

    .email-display {
        font-size: 0.85rem;
        padding: 0.7rem 1.4rem;
        bottom: var(--spacing-md);
        margin-left: -70px;
        margin-bottom: -70px;
    }

    .intro-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2.25rem;
    }

    .hero-greeting {
        font-size: 1.05rem;
    }

    .profile-img {
        width: 140px;
        height: 140px;
    }

    .btn {
        padding: 0.875rem 1.75rem;
        font-size: 0.9rem;
    }

    .email-display {
        font-size: 0.8rem;
        padding: 0.6rem 1.2rem;
        bottom: var(--spacing-sm);
        margin-left: -60px;
        margin-bottom: -60px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}

/* Scroll Animations */
@media (prefers-reduced-motion: no-preference) {

    .featured-card,
    .skill-category,
    .stat {
        opacity: 0;
        transform: translateY(30px);
        animation: fadeInUp 0.6s ease-out forwards;
    }

    .featured-card:nth-child(1) {
        animation-delay: 0.1s;
    }

    .featured-card:nth-child(2) {
        animation-delay: 0.2s;
    }

    .skill-category:nth-child(1) {
        animation-delay: 0.1s;
    }

    .skill-category:nth-child(2) {
        animation-delay: 0.2s;
    }

    .skill-category:nth-child(3) {
        animation-delay: 0.3s;
    }
}

/* Loading State */
.page-loading {
    opacity: 0;
    transition: opacity var(--transition-base);
}

.page-loaded {
    opacity: 1;
}

/* Slide In Animation for Mobile Menu */
@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }

    to {
        transform: translateX(0);
    }
}

/* Smooth transitions for theme changes - exclude transform and opacity */
* {
    transition: background-color var(--transition-base),
        color var(--transition-base),
        border-color var(--transition-base);
}

/* Exclude specific properties from global transition */
img,
.featured-image img,
.profile-img,
.hamburger span,
.theme-toggle,
.email-display {
    transition: all var(--transition-base);
}

/* Ensure images don't break layout */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

body.dark-theme *:focus-visible {
    outline-color: var(--dark-text-accent);
}

/* =========================================
   Timeline Section (Education & Experience)
   ========================================= */
.timeline-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-secondary);
    position: relative;
}

body.dark-theme .timeline-section {
    background: var(--dark-bg-secondary);
}

/* Alternate backgrounds for variety */
.timeline-section:nth-of-type(even) {
    background: var(--bg-primary);
}

body.dark-theme .timeline-section:nth-of-type(even) {
    background: var(--dark-bg-primary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md) 0;
}

/* Vertical Line */
.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: var(--border-primary);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: var(--radius-full);
}

body.dark-theme .timeline::after {
    background: var(--dark-border-primary);
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
    box-sizing: border-box;
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
    /* Hidden initially for animation */
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item:nth-child(1) {
    animation-delay: 0.1s;
}

.timeline-item:nth-child(2) {
    animation-delay: 0.2s;
}

.timeline-item:nth-child(3) {
    animation-delay: 0.3s;
}

.timeline-item:nth-child(4) {
    animation-delay: 0.4s;
}

/* Timeline Dot */
.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--bg-card);
    border: 4px solid var(--accent-primary);
    top: 24px;
    border-radius: 50%;
    z-index: 1;
    transition: all var(--transition-base);
}

body.dark-theme .timeline-item::after {
    background-color: var(--dark-bg-card);
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-item:hover::after {
    background-color: var(--accent-primary);
    transform: scale(1.2);
}

/* Content Box */
.timeline-content {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    position: relative;
    transition: all var(--transition-base);
}

body.dark-theme .timeline-content {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
}

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

/* Arrows */
.timeline-item:nth-child(odd) .timeline-content::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: -10px;
    border: medium solid var(--border-light);
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent var(--border-light);
}

.timeline-item:nth-child(even) .timeline-content::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: -10px;
    border: medium solid var(--border-light);
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--border-light) transparent transparent;
}

/* Fix arrow colors for dark theme/hover if needed, omitted for simplicity to stick to base borders which usually look ok */
body.dark-theme .timeline-item:nth-child(odd) .timeline-content::before {
    border-color: transparent transparent transparent var(--dark-border-primary);
}

body.dark-theme .timeline-item:nth-child(even) .timeline-content::before {
    border-color: transparent var(--dark-border-primary) transparent transparent;
}


.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(90, 138, 138, 0.1);
    color: var(--accent-primary);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

body.dark-theme .timeline-date {
    background: rgba(128, 154, 154, 0.15);
    color: var(--dark-text-accent);
}

.timeline-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

body.dark-theme .timeline-title {
    color: var(--dark-text-primary);
}

.timeline-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

body.dark-theme .timeline-subtitle {
    color: var(--dark-text-muted);
}

.timeline-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

body.dark-theme .timeline-desc {
    color: var(--dark-text-secondary);
}

/* Mobile Timeline */
@media screen and (max-width: 768px) {
    .timeline::after {
        left: 31px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }

    .timeline-item::after {
        left: 21px;
    }

    .timeline-item:nth-child(even) {
        left: 0%;
    }

    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -10px;
        border-width: 10px 10px 10px 0;
        border-color: transparent var(--border-light) transparent transparent;
    }

    body.dark-theme .timeline-item:nth-child(odd) .timeline-content::before,
    body.dark-theme .timeline-item:nth-child(even) .timeline-content::before {
        border-color: transparent var(--dark-border-primary) transparent transparent;
    }
}


/* =========================================
   Certifications Section
   ========================================= */
.cert-section {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-primary);
}

body.dark-theme .cert-section {
    background: var(--dark-bg-primary);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
}

body.dark-theme .cert-card {
    background: var(--dark-bg-card);
    border-color: var(--dark-border-primary);
}

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

.cert-icon {
    width: 50px;
    height: 50px;
    background: rgba(90, 138, 138, 0.1);
    color: var(--accent-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-base);
}

body.dark-theme .cert-icon {
    background: rgba(128, 154, 154, 0.15);
    color: var(--dark-text-accent);
}

.cert-card:hover .cert-icon {
    background: var(--accent-primary);
    color: white;
    transform: rotate(5deg);
}

.cert-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
}

body.dark-theme .cert-title {
    color: var(--dark-text-primary);
}

.cert-issuer {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

body.dark-theme .cert-issuer {
    color: var(--dark-text-muted);
}

.cert-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--border-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

body.dark-theme .cert-date {
    color: var(--dark-text-secondary);
    border-top-color: var(--dark-border-primary);
}

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


/* Blurred Project Effect */
.blurred-project {
    filter: blur(5px);
    pointer-events: none;
    opacity: 0.7;
    user-select: none;
    position: relative;
}

.blurred-project::after {
    content: "Coming Soon";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    z-index: 10;
    filter: none;
    /* Attempt to unblur text, but filter applies to parent. Better approach below */
}

/* Better approach for blurring: blur content but not container overlay */
.blurred-project .featured-image,
.blurred-project .featured-content {
    filter: blur(8px);
}

.blurred-project::before {
    content: "Coming Soon";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(90, 138, 138, 0.9);
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    z-index: 20;
    box-shadow: var(--shadow-lg);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

body.dark-theme .blurred-project::before {
    background: rgba(26, 31, 31, 0.9);
    border: 1px solid var(--dark-border-primary);
    color: var(--dark-text-primary);
}

::selection {
    background: var(--accent-primary);
    color: white;
}

body.dark-theme ::selection {
    background: var(--dark-text-accent);
    color: var(--dark-bg-primary);
}