/* ===================================
   Portfolio Website - Main Stylesheet
   Author: Harsha Lakshitha
   Version: 1.0
   =================================== */

/* ===================================
   CSS Variables (Custom Properties)
   =================================== */
:root {
    /* Colors - Dark Theme (Default) */
    --color-bg: #0a192f;
    --color-bg-light: #112240;
    --color-bg-lighter: #1d3461;
    --color-primary: #60f452;
    --color-primary-tint: rgba(100, 255, 218, 0.1);
    --color-text: #ccd6f6;
    --color-text-light: #8892b0;
    --color-text-lighter: #a8b2d1;
    --color-white: #e6f1ff;
    --color-heading: #ccd6f6;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
    
    /* Font Sizes */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-md: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 2rem;
    --fs-4xl: 2.5rem;
    --fs-5xl: 3rem;
    --fs-6xl: 4rem;
    
    /* 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: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
    --transition-slower: 0.6s ease;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-tooltip: 500;
    
    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Header */
    --header-height: 80px;
}

/* Light Theme */
[data-theme="light"] {
    --color-bg: #f8fafc;
    --color-bg-light: #ffffff;
    --color-bg-lighter: #e2e8f0;
    --color-primary: #0ea5e9;
    --color-primary-tint: rgba(14, 165, 233, 0.1);
    --color-text: #334155;
    --color-text-light: #64748b;
    --color-text-lighter: #475569;
    --color-white: #1e293b;
    --color-heading: #1e293b;
}

/* ===================================
   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);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
    overflow: hidden;
}

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

ul, ol {
    list-style: none;
}

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

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

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.section-title {
    display: flex;
    align-items: center;
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: var(--spacing-3xl);
    white-space: nowrap;
}

.section-title::after {
    content: '';
    display: block;
    height: 1px;
    width: 300px;
    background-color: var(--color-bg-lighter);
    margin-left: var(--spacing-xl);
}

.title-number {
    font-family: var(--font-mono);
    font-size: var(--fs-xl);
    font-weight: 400;
    color: var(--color-primary);
    margin-right: var(--spacing-sm);
}

.inline-link {
    color: var(--color-primary);
    position: relative;
}

.inline-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-base);
}

.inline-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ===================================
   Loader
   =================================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--color-bg-lighter);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.loader-content p {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-primary);
}

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

/* ===================================
   Cursor Glow Effect
   =================================== */
.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    pointer-events: none;
    background: radial-gradient(circle, rgba(100, 255, 218, 0.08) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    z-index: -1;
    transition: opacity var(--transition-base);
    opacity: 0;
}

.cursor-glow.active {
    opacity: 1;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(10, 25, 47, 0.85);
    backdrop-filter: blur(10px);
    z-index: var(--z-fixed);
    transition: var(--transition-base);
}

[data-theme="light"] .navbar {
    background-color: rgba(248, 250, 252, 0.85);
}

.navbar.scrolled {
    height: 70px;
    box-shadow: var(--shadow-lg);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.nav-logo {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.logo-text {
    display: inline-block;
    width: 90px;
    height: 45px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    transition: var(--transition-base);
}

.logo-text:hover {
    background-color: var(--color-primary-tint);
}

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

.nav-link {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    padding: var(--spacing-sm);
    position: relative;
}

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

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-base);
}

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

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

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

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    width: 30px;
    height: 30px;
    position: relative;
    z-index: calc(var(--z-fixed) + 10);
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 0;
    flex-shrink: 0;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    position: absolute;
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    transition: var(--transition-base);
    border-radius: 2px;
    left: 0;
}

.hamburger {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger::before {
    content: '';
    top: -9px;
}

.hamburger::after {
    content: '';
    top: 9px;
}

.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-bg);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--color-primary);
    box-shadow: inset 0 0 0 2px var(--color-primary);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    box-shadow: inset 0 0 0 2px var(--color-primary);
}

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

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
}

.hero-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

/* Profile Image */
.hero-image-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.hero-image {
    position: relative;
    width: 280px;
    height: 280px;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    filter: grayscale(20%);
    transition: var(--transition-base);
}

.hero-image:hover img {
    filter: grayscale(0);
}

.image-border {
    position: absolute;
    top: 15px;
    left: 15px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    z-index: -1;
    transition: var(--transition-base);
}

.hero-image:hover .image-border {
    top: 10px;
    left: 10px;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-xl);
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* Hero Text */
.hero-text {
    max-width: 600px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: var(--fs-md);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: clamp(var(--fs-4xl), 8vw, var(--fs-6xl));
    font-weight: 700;
    color: var(--color-heading);
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: clamp(var(--fs-2xl), 5vw, var(--fs-5xl));
    font-weight: 600;
    color: var(--color-text-light);
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

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

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.hero-social {
    display: flex;
    gap: var(--spacing-lg);
}

.hero-social a {
    font-size: var(--fs-xl);
    color: var(--color-text-light);
    transition: var(--transition-base);
}

.hero-social a:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* 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);
    animation: bounce 2s infinite;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--color-text-light);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

.scroll-indicator span {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    font-family: var(--font-mono);
}

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

@keyframes scroll {
    0%, 100% {
        opacity: 1;
        transform: translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateY(5px);
    }
}

/* ===================================
   About Section
   =================================== */
.about-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

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

.skills-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.skills-list li {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.skills-list li i {
    color: var(--color-primary);
    font-size: var(--fs-xs);
}

/* About Image */
.about-image .image-wrapper {
    position: relative;
    max-width: 300px;
    margin: 0 auto;
}

.about-image img {
    width: 100%;
    border-radius: var(--radius-md);
    filter: grayscale(20%);
    transition: var(--transition-base);
}

.about-image:hover img {
    filter: grayscale(0);
}

.about-image .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-primary-tint);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.about-image:hover .image-overlay {
    background-color: transparent;
}

.about-image .image-wrapper::after {
    content: '';
    position: absolute;
    top: 15px;
    left: 15px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    z-index: -1;
    transition: var(--transition-base);
}

.about-image:hover .image-wrapper::after {
    top: 10px;
    left: 10px;
}

/* Skills Section */
.skills-section {
    background-color: var(--color-bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
}

.skills-title {
    font-size: var(--fs-xl);
    color: var(--color-heading);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.skill-category h4 {
    font-size: var(--fs-md);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.skill-tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-bg);
    color: var(--color-text-light);
    font-size: var(--fs-sm);
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
}

.skill-tag:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-tint);
}

/* ===================================
   Experience Section
   =================================== */
.experience-content {
    display: flex;
    gap: var(--spacing-2xl);
}

.experience-tabs {
    display: flex;
    flex-direction: column;
    position: relative;
    min-width: 200px;
}

.tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    text-align: left;
    background-color: transparent;
    border-left: 2px solid var(--color-bg-lighter);
    transition: var(--transition-base);
}

.tab-btn:hover {
    background-color: var(--color-bg-light);
    color: var(--color-primary);
}

.tab-btn.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    background-color: var(--color-bg-light);
}

.experience-panels {
    flex: 1;
}

.experience-panel {
    display: none;
}

.experience-panel.active {
    display: block;
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.job-title {
    font-size: var(--fs-xl);
    color: var(--color-heading);
    margin-bottom: var(--spacing-sm);
}

.job-title .company a {
    color: var(--color-primary);
}

.job-title .company a:hover {
    text-decoration: underline;
}

.job-duration {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.job-description {
    margin-bottom: var(--spacing-lg);
}

.job-description li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

.job-description li i {
    color: var(--color-primary);
    margin-top: 6px;
    flex-shrink: 0;
}

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

.job-tech span {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary-tint);
    color: var(--color-primary);
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    border-radius: var(--radius-sm);
}

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

/* ===================================
   Certifications Section
   =================================== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.cert-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    transition: var(--transition-base);
}

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

.cert-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-2xl);
    color: var(--color-primary);
    background-color: var(--color-primary-tint);
    border-radius: var(--radius-md);
}

.cert-content h3 {
    font-size: var(--fs-lg);
    color: var(--color-heading);
    margin-bottom: var(--spacing-xs);
}

.cert-issuer {
    color: var(--color-primary);
    font-size: var(--fs-sm);
    margin-bottom: var(--spacing-sm);
}

.cert-date,
.cert-id {
    font-size: var(--fs-xs);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.cert-verify {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--fs-sm);
    color: var(--color-primary);
    margin-top: var(--spacing-sm);
}

.cert-verify:hover {
    text-decoration: underline;
}

.cert-badge {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-badge img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    opacity: 0.8;
    transition: var(--transition-base);
}

.cert-card:hover .cert-badge img {
    opacity: 1;
}

/* ===================================
   Projects Section
   =================================== */
.featured-projects {
    margin-bottom: var(--spacing-3xl);
}

.featured-project {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-4xl);
}

.featured-project:nth-child(even) {
    direction: rtl;
}

.featured-project:nth-child(even) > * {
    direction: ltr;
}

.featured-project:nth-child(even) .project-content {
    text-align: right;
}

.featured-project:nth-child(even) .project-tech-list,
.featured-project:nth-child(even) .project-links {
    justify-content: flex-end;
}

.project-overline {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.project-title {
    font-size: var(--fs-2xl);
    color: var(--color-heading);
    margin-bottom: var(--spacing-lg);
}

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

.project-description {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.project-description p {
    color: var(--color-text-light);
}

.project-tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.project-tech-list li {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

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

.project-links a {
    font-size: var(--fs-xl);
    color: var(--color-text-light);
    transition: var(--transition-base);
}

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

.project-links .live-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--fs-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-primary-tint);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
}

.project-links .live-link:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
}

.project-image {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.project-image .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-primary-tint);
    transition: var(--transition-base);
}

.project-image:hover .image-overlay {
    background-color: transparent;
}

.project-image:hover img {
    transform: scale(1.05);
}

/* Other Projects */
.other-projects-title {
    font-size: var(--fs-2xl);
    color: var(--color-heading);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.project-card {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-7px);
    box-shadow: var(--shadow-lg);
}

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

.folder-icon {
    font-size: var(--fs-3xl);
    color: var(--color-primary);
}

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

.card-links a {
    font-size: var(--fs-lg);
    color: var(--color-text-light);
    transition: var(--transition-base);
}

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

.card-title {
    font-size: var(--fs-xl);
    color: var(--color-heading);
    margin-bottom: var(--spacing-md);
}

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

.card-description {
    color: var(--color-text-light);
    font-size: var(--fs-sm);
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.card-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.card-tech li {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-text-light);
}

.view-archive {
    text-align: center;
}

/* ===================================
   Writing Section
   =================================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.article-card {
    background-color: var(--color-bg-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
}

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

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

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.article-image .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.7) 100%);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

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

.article-date {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.article-title {
    font-size: var(--fs-lg);
    color: var(--color-heading);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

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

.article-excerpt {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.read-more {
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.read-more:hover {
    gap: var(--spacing-md);
}

/* ===================================
   Contact Section
   =================================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-text h3 {
    font-size: var(--fs-3xl);
    color: var(--color-heading);
    margin-bottom: var(--spacing-lg);
}

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

.contact-info {
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

.contact-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary-tint);
    color: var(--color-primary);
    border-radius: var(--radius-md);
}

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

.contact-social {
    display: flex;
    gap: var(--spacing-lg);
}

.contact-social a {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-light);
    color: var(--color-text-light);
    border-radius: var(--radius-md);
    font-size: var(--fs-lg);
    transition: var(--transition-base);
}

.contact-social a:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form {
    background-color: var(--color-bg-light);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-bg-lighter);
    border-radius: var(--radius-md);
    color: var(--color-text);
    transition: var(--transition-base);
}

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

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

.contact-form .btn {
    width: 100%;
    justify-content: center;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-bg-light);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-bg-lighter);
}

.footer-logo {
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--color-heading);
}

.footer-left p {
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
    max-width: 300px;
}

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

.footer-column h4 {
    font-size: var(--fs-md);
    color: var(--color-heading);
    margin-bottom: var(--spacing-md);
}

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--color-text-light);
    font-size: var(--fs-sm);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom p {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

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

.footer-bottom a:hover {
    text-decoration: underline;
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   Animations
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slower), transform var(--transition-slower);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered animation delays */
.fade-in:nth-child(1) { transition-delay: 0.1s; }
.fade-in:nth-child(2) { transition-delay: 0.2s; }
.fade-in:nth-child(3) { transition-delay: 0.3s; }
.fade-in:nth-child(4) { transition-delay: 0.4s; }
.fade-in:nth-child(5) { transition-delay: 0.5s; }
.fade-in:nth-child(6) { transition-delay: 0.6s; }

/* ===================================
   Responsive Design
   =================================== */

/* Large Devices (Desktops, less than 1200px) */
@media (max-width: 1200px) {
    .section-title::after {
        width: 200px;
    }
    
    .hero-content {
        grid-template-columns: 250px 1fr;
        gap: var(--spacing-2xl);
    }
    
    .hero-image {
        width: 230px;
        height: 230px;
    }
}

/* Medium Devices (Tablets, less than 992px) */
@media (max-width: 992px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 400px;
        height: 100vh;
        background-color: var(--color-bg-light);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xl);
        transition: var(--transition-base);
        box-shadow: var(--shadow-xl);
        z-index: var(--z-fixed);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image-wrapper {
        order: -1;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
        margin-bottom: var(--spacing-xl);
    }
    
    .experience-content {
        flex-direction: column;
    }
    
    .experience-tabs {
        flex-direction: row;
        overflow-x: auto;
        min-width: 100%;
    }
    
    .tab-btn {
        border-left: none;
        border-bottom: 2px solid var(--color-bg-lighter);
        white-space: nowrap;
    }
    
    .tab-btn.active {
        border-bottom-color: var(--color-primary);
    }
    
    .featured-project,
    .featured-project:nth-child(even) {
        grid-template-columns: 1fr;
        direction: ltr;
    }
    
    .featured-project:nth-child(even) .project-content {
        text-align: left;
    }
    
    .featured-project:nth-child(even) .project-tech-list,
    .featured-project:nth-child(even) .project-links {
        justify-content: flex-start;
    }
    
    .project-image {
        height: 300px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-left p {
        max-width: 100%;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .footer-bottom {
        justify-content: center;
        text-align: center;
    }
}

/* Small Devices (Landscape phones, less than 768px) */
@media (max-width: 768px) {
    :root {
        --spacing-4xl: 4rem;
    }
    
    .section-title {
        font-size: var(--fs-2xl);
    }
    
    .section-title::after {
        width: 100px;
    }
    
    .hero-image {
        width: 200px;
        height: 200px;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-card {
        grid-template-columns: auto 1fr;
    }
    
    .cert-badge {
        display: none;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* Extra Small Devices (Portrait phones, less than 576px) */
@media (max-width: 576px) {
    :root {
        --container-padding: 1rem;
        --spacing-4xl: 3rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .logo-text {
        width: 60px;
        height: 40px;
        font-size: var(--fs-sm);
    }
    
    .nav-toggle {
        width: 28px;
        height: 28px;
    }
    
    .hamburger,
    .hamburger::before,
    .hamburger::after {
        height: 2px;
    }
    
    .hamburger::before {
        top: -7px;
    }
    
    .hamburger::after {
        top: 7px;
    }
    
    .hero-title {
        font-size: var(--fs-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--fs-xl);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .skills-list {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .project-description {
        padding: var(--spacing-md);
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xl);
    }
    
    .scroll-indicator {
        display: none;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
    
    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .back-to-top,
    .scroll-indicator,
    .cursor-glow,
    .loader {
        display: none;
    }
    
    body {
        background-color: white;
        color: black;
    }
    
    .section {
        page-break-inside: avoid;
    }
}