/* ═══════════════════════════════════════════════════════════════════════════
   SLEIMAN EL HAJJ - PORTFOLIO STYLES
   A modern, Three.js-powered portfolio design
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   CSS VARIABLES
   ───────────────────────────────────────────────────────────────────────────── */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a25;
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-accent: #22d3ee;
    --color-accent-secondary: #f472b6;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-border: rgba(99, 102, 241, 0.2);
    --color-glass: rgba(10, 10, 15, 0.8);
    --color-glass-light: rgba(255, 255, 255, 0.05);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    --gradient-text: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    --gradient-card: linear-gradient(145deg, var(--color-bg-secondary), var(--color-bg-tertiary));
    
    /* Typography */
    --font-primary: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Z-Index */
    --z-bg: -1;
    --z-content: 1;
    --z-nav: 100;
    --z-modal: 200;
    --z-loading: 300;
}

/* ─────────────────────────────────────────────────────────────────────────────
   RESET & BASE
   ───────────────────────────────────────────────────────────────────────────── */
*, *::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;
}

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

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

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

ul, ol {
    list-style: none;
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   THREE.JS CONTAINER
   ───────────────────────────────────────────────────────────────────────────── */
#three-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-bg);
    pointer-events: none;
}

#three-container canvas {
    display: block;
}

/* ─────────────────────────────────────────────────────────────────────────────
   SCROLL PROGRESS
   ───────────────────────────────────────────────────────────────────────────── */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: var(--z-nav);
    background: var(--color-bg-tertiary);
}

.scroll-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    transition: width 0.1s linear;
}

/* ─────────────────────────────────────────────────────────────────────────────
   NAVIGATION
   ───────────────────────────────────────────────────────────────────────────── */
.nav-floating {
    position: fixed;
    top: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    z-index: var(--z-nav);
    transition: var(--transition-base);
}

.nav-floating:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.2);
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--space-sm);
}

.nav-link {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    background: var(--color-glass-light);
}

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

.nav-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.nav-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

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

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

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

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    background: var(--color-bg);
    z-index: calc(var(--z-nav) - 1);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
}

.mobile-nav.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-link {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.mobile-nav-link:hover {
    color: var(--color-primary-light);
    transform: translateX(10px);
}

/* ─────────────────────────────────────────────────────────────────────────────
   MAIN CONTENT
   ───────────────────────────────────────────────────────────────────────────── */
.content {
    position: relative;
    z-index: var(--z-content);
}

.section {
    min-height: 100vh;
    padding: var(--space-2xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.section-number {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-primary);
}

.section-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-text);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   HERO SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: left;
    padding-top: 100px;
}

.hero-content {
    max-width: 800px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: clamp(0.875rem, 2vw, 1rem);
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 0.5s;
}

.hero-name {
    font-size: clamp(2.5rem, 10vw, 5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-md);
}

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

.name-line:first-child {
    animation-delay: 0.7s;
}

.name-line.accent {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation-delay: 0.9s;
}

.hero-title {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 1.1s;
}

.title-dynamic {
    color: var(--color-accent);
    position: relative;
}

.title-dynamic::after {
    content: '|';
    animation: blink 1s infinite;
    margin-left: 2px;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 1.3s;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 1.5s;
}

.hero-social {
    display: flex;
    gap: var(--space-md);
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
    animation-delay: 1.7s;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.social-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    opacity: 0;
    animation: fadeIn 0.6s ease forwards;
    animation-delay: 2s;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-muted);
    border-radius: var(--radius-lg);
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   BUTTONS
   ───────────────────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   ABOUT SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

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

.about-intro {
    font-size: 1.25rem;
    color: var(--color-text) !important;
}

.highlight {
    color: var(--color-primary-light);
    font-weight: 500;
}

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

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

.frame-corner {
    position: absolute;
    width: 50px;
    height: 50px;
    border: 2px solid var(--color-primary);
}

.frame-corner.top-left {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.frame-corner.top-right {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
}

.frame-corner.bottom-left {
    bottom: 0;
    left: 0;
    border-right: none;
    border-top: none;
}

.frame-corner.bottom-right {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
}

.image-placeholder {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: var(--gradient-card);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

.initials {
    font-size: 4rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ─────────────────────────────────────────────────────────────────────────────
   SKILLS SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.skills-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.skill-category {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
}

.skill-category:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.category-icon {
    font-size: 1.5rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-glass-light);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    cursor: default;
}

.skill-item:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: scale(1.05);
}

.skill-icon {
    font-size: 2rem;
}

.skill-item span {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-align: center;
}

/* ─────────────────────────────────────────────────────────────────────────────
   EXPERIENCE SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.experience-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

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

.experience-item {
    position: relative;
    padding-left: var(--space-xl);
    padding-bottom: var(--space-xl);
}

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

.exp-marker {
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 3px var(--color-primary);
}

.exp-content {
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
}

.exp-content:hover {
    border-color: var(--color-primary);
    transform: translateX(10px);
}

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

.exp-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.exp-company {
    color: var(--color-primary-light);
    font-weight: 500;
}

.exp-meta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.exp-type,
.exp-date {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.exp-type {
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-glass-light);
    border-radius: var(--radius-sm);
}

.exp-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.exp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.exp-tags span {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--color-accent);
    background: rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-sm);
}

/* ─────────────────────────────────────────────────────────────────────────────
   PROJECTS SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

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

.project-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

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

.project-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.project-card.featured .project-image {
    aspect-ratio: auto;
    height: 100%;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-bg-tertiary), var(--color-bg-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-emoji {
    font-size: 4rem;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(99, 102, 241, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-base);
}

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

.project-link {
    color: white;
    font-weight: 600;
    font-size: 1.125rem;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid white;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

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

.project-info {
    padding: var(--space-lg);
}

.project-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
}

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

.project-tech span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.project-tech span::before {
    content: '#';
    color: var(--color-accent);
}

/* ─────────────────────────────────────────────────────────────────────────────
   CONTACT SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-intro {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.contact-method:hover {
    border-color: var(--color-primary);
    transform: translateX(10px);
}

.method-icon {
    font-size: 1.5rem;
}

.method-info {
    display: flex;
    flex-direction: column;
}

.method-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.method-value {
    color: var(--color-text);
    font-weight: 500;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    padding-top: var(--space-lg);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    resize: none;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group label {
    position: absolute;
    top: 50%;
    left: var(--space-md);
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
    transition: var(--transition-base);
}

.form-group textarea + label {
    top: var(--space-lg);
    transform: none;
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
    top: var(--space-sm);
    font-size: 0.75rem;
    color: var(--color-primary);
    transform: none;
}

.form-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.form-group input:focus ~ .form-line,
.form-group textarea:focus ~ .form-line {
    width: 100%;
}

.btn-submit {
    align-self: flex-start;
}

/* ─────────────────────────────────────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────────────────────────────────────── */
.footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-left p,
.footer-right p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.footer-right {
    text-align: right;
}

.footer-note {
    margin-top: var(--space-sm);
}

/* ─────────────────────────────────────────────────────────────────────────────
   LOADING SCREEN
   ───────────────────────────────────────────────────────────────────────────── */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-container {
    position: relative;
    width: 150px;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader-ring {
    position: absolute;
    border-radius: var(--radius-full);
    border: 3px solid transparent;
    animation: rotate 1.5s linear infinite;
}

.loader-ring:nth-child(1) {
    width: 100%;
    height: 100%;
    border-top-color: var(--color-primary);
    animation-duration: 1.5s;
}

.loader-ring:nth-child(2) {
    width: 75%;
    height: 75%;
    border-right-color: var(--color-accent);
    animation-duration: 1.2s;
    animation-direction: reverse;
}

.loader-ring:nth-child(3) {
    width: 50%;
    height: 50%;
    border-bottom-color: var(--color-accent-secondary);
    animation-duration: 0.9s;
}

.loader-text {
    display: flex;
    gap: 2px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text);
}

.loader-text span {
    animation: bounce 1s infinite;
}

.loader-text span:nth-child(1) { animation-delay: 0s; }
.loader-text span:nth-child(2) { animation-delay: 0.1s; }
.loader-text span:nth-child(3) { animation-delay: 0.2s; }
.loader-text span:nth-child(4) { animation-delay: 0.3s; }
.loader-text span:nth-child(5) { animation-delay: 0.4s; }
.loader-text span:nth-child(6) { animation-delay: 0.5s; }
.loader-text span:nth-child(7) { animation-delay: 0.6s; }

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

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

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

@keyframes scroll {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(10px); opacity: 0; }
}

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

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* ─────────────────────────────────────────────────────────────────────────────
   RESPONSIVE DESIGN
   ───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .section {
        padding: var(--space-xl) var(--space-lg);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .about-image {
        order: -1;
    }
    
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card.featured {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-floating {
        padding: var(--space-sm) var(--space-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-menu-btn {
        display: flex;
    }
    
    .section {
        padding: var(--space-lg);
        min-height: auto;
        padding-top: var(--space-2xl);
        padding-bottom: var(--space-xl);
    }
    
    .hero-section {
        min-height: 100vh;
        padding-top: 120px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    .footer-right {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .image-frame {
        width: 250px;
        height: 300px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .exp-header {
        flex-direction: column;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   UTILITY CLASSES
   ───────────────────────────────────────────────────────────────────────────── */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   TERMINAL SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.terminal-section {
    min-height: auto;
    padding: var(--space-2xl) 0;
}

.terminal-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.terminal-window {
    width: 100%;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(99, 102, 241, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.terminal-header {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, transparent 100%);
    border-bottom: 1px solid var(--color-border);
}

.terminal-controls {
    display: flex;
    gap: 8px;
}

.terminal-controls .control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.terminal-controls .control.close {
    background: #ff5f56;
}

.terminal-controls .control.minimize {
    background: #ffbd2e;
}

.terminal-controls .control.maximize {
    background: #27c93f;
}

.terminal-controls .control:hover {
    filter: brightness(1.2);
}

.terminal-title {
    flex: 1;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
}

.terminal-body {
    padding: var(--space-lg);
    min-height: 350px;
    max-height: 450px;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.8;
}

.terminal-body::-webkit-scrollbar {
    width: 8px;
}

.terminal-body::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
}

.terminal-body::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 4px;
}

.terminal-line {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-xs);
}

.terminal-line .prompt {
    color: var(--color-accent);
    margin-right: var(--space-sm);
    font-weight: 600;
}

.terminal-line .command {
    color: var(--color-primary-light);
}

.terminal-line .typed-command {
    color: var(--color-text);
}

.bio-line {
    color: var(--color-text-secondary);
    padding-left: var(--space-md);
    margin-bottom: var(--space-xs);
    opacity: 0.9;
}

.bio-line::before {
    content: '';
}

.terminal-cursor {
    display: inline-block;
    width: 10px;
    height: 1.2em;
    background: var(--color-primary);
    animation: blink 1s step-end infinite;
    vertical-align: middle;
    margin-left: 2px;
}

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

.terminal-run-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-primary);
    color: white;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.terminal-run-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.terminal-run-btn:active {
    transform: translateY(0);
}

.terminal-run-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.terminal-run-btn .btn-icon {
    font-size: 0.8em;
}

/* Terminal responsive */
@media (max-width: 768px) {
    .terminal-body {
        padding: var(--space-md);
        font-size: 0.8rem;
        min-height: 300px;
    }
    
    .terminal-run-btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.9rem;
    }
}

/* ─────────────────────────────────────────────────────────────────────────────
   ANIMATED STAT COUNTERS
   ───────────────────────────────────────────────────────────────────────────── */
.stat-number {
    font-variant-numeric: tabular-nums;
}

.stat-number.counting {
    color: var(--color-accent);
}

/* ─────────────────────────────────────────────────────────────────────────────
   3D RESUME BUTTON & MODAL
   ───────────────────────────────────────────────────────────────────────────── */
.resume-btn {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
    padding: var(--space-md) var(--space-xl);
    background: var(--gradient-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.resume-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.2), transparent);
    transition: left 0.5s ease;
}

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

.resume-btn:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.3);
}

.resume-btn-icon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.resume-btn-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.resume-btn-hint {
    font-size: 0.75rem;
    color: var(--color-accent);
    background: rgba(34, 211, 238, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

/* Resume Modal */
.resume-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.resume-modal.active {
    display: flex;
    opacity: 1;
}

.resume-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.resume-modal-content {
    position: relative;
    width: 90%;
    max-width: 900px;
    height: 80vh;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.4s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(50px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.resume-close-btn {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 40px;
    height: 40px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text);
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition-base);
}

.resume-close-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: rotate(90deg);
}

.resume-3d-container {
    flex: 1;
    position: relative;
}

.resume-3d-container canvas {
    width: 100% !important;
    height: 100% !important;
}

.resume-controls {
    padding: var(--space-lg);
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.resume-instruction {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.resume-download-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: var(--transition-base);
}

.resume-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
}

/* Resume Modal Responsive */
@media (max-width: 768px) {
    .resume-modal-content {
        width: 95%;
        height: 85vh;
    }
    
    .resume-controls {
        flex-direction: column;
        text-align: center;
    }
    
    .resume-btn {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
}