/**
 * ============================================
 * PORTFOLIO STYLES - BLUE & WHITE ENTERPRISE
 * ============================================
 * Joyful enterprise design inspired by Israel colors,
 * Microsoft, and Facebook - clean, trustworthy, professional
 */

/* ==========================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ========================================== */
:root {
    /* Clean Dark Background with Blue Tint */
    --color-bg-primary: #0a0e1a;
    --color-bg-secondary: #0f1629;
    --color-bg-tertiary: #151d35;
    --color-bg-elevated: #1a2440;
    --color-bg-glass: rgba(59, 130, 246, 0.05);
    --color-bg-glass-hover: rgba(59, 130, 246, 0.1);

    /* Blue & White - Israel/Microsoft/Facebook Style */
    --color-accent-primary: #2563eb;
    /* Vibrant Blue - Trust */
    --color-accent-secondary: #3b82f6;
    /* Bright Blue - Joy */
    --color-accent-tertiary: #60a5fa;
    /* Light Blue - Energy */
    --color-accent-light: #93c5fd;
    /* Sky Blue - Fresh */
    --color-accent-white: #ffffff;
    /* Pure White */
    --color-accent-success: #22c55e;
    /* Green */
    --color-accent-warning: #f59e0b;
    /* Amber */

    /* Gradient - Blue Joy */
    --color-accent-gradient: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #60a5fa 100%);
    --color-accent-gradient-bright: linear-gradient(135deg, #3b82f6 0%, #60a5fa 100%);
    --color-accent-gradient-subtle: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(59, 130, 246, 0.08) 100%);

    /* Text Colors - Clean White */
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.9);
    --color-text-tertiary: rgba(255, 255, 255, 0.65);
    --color-text-muted: rgba(255, 255, 255, 0.45);

    /* Border Colors */
    --color-border: rgba(59, 130, 246, 0.15);
    --color-border-hover: rgba(59, 130, 246, 0.3);
    --color-border-accent: rgba(59, 130, 246, 0.5);

    /* Shadows - Blue glow */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.2);
    --shadow-glow-hover: 0 0 50px rgba(59, 130, 246, 0.35);

    /* Typography */
    --font-primary: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;

    /* 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 - Friendlier, rounder */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Z-index */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
}

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

a {
    color: inherit;
    text-decoration: none;
}

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

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

ul,
ol {
    list-style: none;
}

/* ==========================================
   ANIMATED BACKGROUND - Subtle geometric
   ========================================== */
.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 25s ease-in-out infinite;
}

.orb-1 {
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, #2563eb 0%, transparent 70%);
    top: -300px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    animation-delay: -10s;
}

.orb-3 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #60a5fa 0%, transparent 70%);
    top: 40%;
    left: 60%;
    transform: translate(-50%, -50%);
    animation-delay: -5s;
    opacity: 0.25;
}

@keyframes float {

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

    33% {
        transform: translate(50px, -30px) scale(1.02);
    }

    66% {
        transform: translate(-30px, 20px) scale(0.98);
    }
}

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

/* ==========================================
   NAVIGATION - Clean Microsoft style
   ========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--spacing-md) 0;
    transition: all var(--transition-normal);
    background: rgba(15, 15, 15, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: rgba(15, 15, 15, 0.95);
    border-bottom-color: var(--color-border);
}

.nav.hidden {
    transform: translateY(-100%);
}

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

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

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.logo-text::after {
    content: '.';
    color: var(--color-accent-primary);
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
    padding: var(--spacing-sm) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-primary);
    transition: width var(--transition-normal);
}

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

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

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

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

/* ==========================================
   HERO SECTION - Bold and Professional
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-4xl) var(--spacing-lg);
    position: relative;
}

.hero-content {
    max-width: 650px;
    z-index: var(--z-base);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-accent-gradient-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

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

    50% {
        opacity: 0.6;
        transform: scale(1.15);
    }
}

.hero-title {
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.1s both;
}

.greeting {
    display: block;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-xs);
}

.name {
    display: block;
    font-size: clamp(2.75rem, 7vw, 4rem);
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease 0.5s both;
}

.stat {
    text-align: left;
}

.stat-number {
    display: block;
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    margin-top: var(--spacing-xs);
}

.hero-visual {
    display: none;
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
}

/* Code Window - Terminal style */
.code-window {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: fadeInRight 0.8s ease 0.6s both;
    width: 420px;
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red {
    background: #ff5f57;
}

.code-dot.yellow {
    background: #febc2e;
}

.code-dot.green {
    background: #28c840;
}

.code-title {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.code-content {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.7;
    overflow-x: auto;
}

.code-keyword {
    color: #60a5fa;
    /* Light Blue */
}

.code-variable {
    color: #93c5fd;
    /* Sky Blue */
}

.code-property {
    color: #38bdf8;
    /* Cyan Blue */
}

.code-string {
    color: #fcd34d;
    /* Warm Yellow for contrast */
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    animation: fadeIn 1s ease 1s both;
}

.mouse {
    width: 22px;
    height: 38px;
    border: 2px solid var(--color-text-muted);
    border-radius: var(--radius-full);
    position: relative;
}

.wheel {
    width: 3px;
    height: 7px;
    background: var(--color-text-muted);
    border-radius: var(--radius-full);
    position: absolute;
    top: 7px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    50% {
        opacity: 0.3;
        transform: translateX(-50%) translateY(10px);
    }
}

.scroll-indicator span {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* ==========================================
   BUTTONS - Joyful Enterprise style
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-hover);
    filter: brightness(1.1);
}

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

.btn-secondary:hover {
    background: var(--color-bg-glass-hover);
    border-color: var(--color-accent-primary);
    color: var(--color-accent-tertiary);
}

.btn-download {
    background: var(--color-accent-gradient);
    color: var(--color-text-primary);
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    flex: 1;
    border: none;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    filter: brightness(1.1);
}

.btn-github {
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
}

.btn-github:hover {
    background: var(--color-bg-glass-hover);
    border-color: var(--color-accent-primary);
}

/* ==========================================
   SECTION STYLES
   ========================================== */
.section {
    padding: var(--spacing-4xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent-gradient-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-accent-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.05rem;
    color: var(--color-text-tertiary);
    line-height: 1.7;
}

/* ==========================================
   SERVICES / WHAT I DO SECTION
   ========================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.service-card:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-accent);
    transform: translateY(-6px);
    box-shadow: var(--shadow-glow);
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-gradient-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent-primary);
    margin-bottom: var(--spacing-lg);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.service-description {
    font-size: 0.95rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.skills-container {
    margin-top: var(--spacing-2xl);
}

.skills-container h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.skill-item:hover {
    background: var(--color-bg-glass-hover);
    border-color: var(--color-border-accent);
}

.skill-icon {
    width: 20px;
    height: 20px;
    color: var(--color-accent-primary);
}

.skill-icon svg {
    width: 100%;
    height: 100%;
}

.skill-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

/* ==========================================
   FEATURED WORK / APPS SECTION
   ========================================== */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--spacing-xl);
}

.app-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
}

.app-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-accent);
    box-shadow: var(--shadow-glow);
}

/* App Preview Image */
.app-preview {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

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

.app-card:hover .app-preview img {
    transform: scale(1.03);
}

.app-body {
    padding: var(--spacing-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

.app-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    position: relative;
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.app-icon-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent-primary);
}

.app-icon img+.app-icon-fallback {
    display: none;
}

.app-platform {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.app-platform svg {
    width: 12px;
    height: 12px;
}

.app-content {
    flex: 1;
}

.app-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.app-description {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.app-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.feature {
    font-size: 0.7rem;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-accent-gradient-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-sm);
    color: var(--color-accent-secondary);
}

.app-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: auto;
}

/* ==========================================
   PROJECTS SECTION
   ========================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-accent);
    box-shadow: var(--shadow-glow);
}

.project-card.featured {
    grid-column: span 1;
}

.project-image {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform var(--transition-slow), opacity 0.3s ease;
}

.project-image img[loading="lazy"] {
    opacity: 0;
}

.project-image img.loaded,
.project-image img:not([loading="lazy"]) {
    opacity: 1;
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    background: var(--color-bg-tertiary);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

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

.project-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
    transform: translateY(10px);
}

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

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

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

.project-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.project-description {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    font-size: 0.7rem;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-tertiary);
}

/* ==========================================
   PUBLICATIONS SECTION
   ========================================== */
.publications-grid {
    display: grid;
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.publication-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-xl);
    align-items: center;
    transition: all var(--transition-normal);
}

.publication-card:hover {
    border-color: var(--color-border-accent);
    box-shadow: var(--shadow-glow);
}

.publication-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-gradient-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent-primary);
}

.publication-content {
    flex: 1;
}

.publication-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.publication-journal,
.publication-year {
    font-size: 0.8rem;
    color: var(--color-accent-secondary);
    font-weight: 600;
}

.publication-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.publication-description {
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.publication-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.publication-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-accent-primary);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.publication-link:hover {
    background: #106ebe;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

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

.contact-card:hover {
    border-color: var(--color-border-accent);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-gradient-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent-primary);
}

.contact-details h4 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.contact-details a {
    font-size: 0.95rem;
    color: var(--color-text-primary);
    transition: color var(--transition-fast);
}

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

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

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    color: var(--color-text-primary);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--color-border);
}

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

.footer p {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

.footer-tagline {
    margin-top: var(--spacing-sm);
    color: var(--color-accent-primary);
    font-weight: 500;
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

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

.animate-target {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 1.5fr 1fr;
    }
}

@media (min-width: 1024px) {
    .hero {
        padding: var(--spacing-4xl);
    }

    .hero-content {
        max-width: 600px;
    }

    .hero-visual {
        display: block;
        position: absolute;
        right: 8%;
        top: 50%;
        transform: translateY(-50%);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 280px;
        height: 100vh;
        background: var(--color-bg-secondary);
        border-left: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-4xl) var(--spacing-xl);
        gap: var(--spacing-lg);
        transition: right var(--transition-normal);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: calc(var(--z-sticky) + 1);
    }

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

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .projects-grid,
    .apps-grid {
        grid-template-columns: 1fr;
    }

    .publication-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .publication-icon {
        justify-self: center;
    }

    .publication-link {
        justify-self: center;
    }

    .publication-tags {
        justify-content: center;
    }

    .hero-stats {
        gap: var(--spacing-xl);
    }

    .stat-number {
        font-size: 1.75rem;
    }

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

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .hero {
        padding: var(--spacing-3xl) var(--spacing-md);
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .scroll-indicator {
        display: none;
    }
}