/* ============================================
   ROOT & THEME VARIABLES
   ============================================ */

:root {
    /* Dark Theme (Default) - Modern & Professional */
    --bg: #0f172a;
    --surface: #1a2a4e;
    --surface-2: #243456;
    --text: #f0f4f8;
    --muted: #a8b5c7;
    --border: rgba(74, 144, 226, 0.15);
    --accent: #4a90e2;
    --accent-2: #00d4ff;
    --accent-3: #7c3aed;
    --accent-dark: #3b82f6;
    --success: #10b981;
    --warning: #f59e0b;
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 8px 16px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.15);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'Fira Code', 'Monaco', monospace;
    --text-base: 1rem;
    --text-sm: 0.875rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;

    /* Transitions */
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
    --transition-slow: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

body.light {
    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-2: #f1f5f9;
    --text: #0f172a;
    --muted: #475569;
    --border: rgba(74, 144, 226, 0.12);
    --accent: #3b82f6;
    --accent-2: #0ea5e9;
    --accent-3: #8b5cf6;
    --accent-dark: #2563eb;
    --success: #059669;
    --warning: #d97706;
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 8px 16px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.06);
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--accent-2);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent);
    color: white;
    padding: var(--spacing-sm);
    z-index: 100;
    border-radius: 0 0 8px 0;
}

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(15, 23, 42, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition-fast);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

body.light .header {
    background: rgba(248, 250, 252, 0.97);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-lg);
}

.logo {
    font-size: var(--text-2xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
    transition: transform var(--transition-fast);
    cursor: pointer;
}

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

.navigation {
    display: flex;
    gap: var(--spacing-lg);
    flex: 1;
    justify-content: center;
}

.nav-link {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--muted);
    transition: all var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 6px;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link[aria-current="true"]::after {
    width: 100%;
}

.nav-link:hover,
.nav-link[aria-current="true"] {
    color: var(--accent);
}

.theme-toggle {
    background: var(--surface);
    border: 2px solid var(--border);
    color: var(--text);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.3rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: rotate(25deg) scale(1.1);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.2);
}

@media (max-width: 768px) {
    .navigation {
        display: none;
    }

    .header-content {
        justify-content: space-between;
    }

    .logo {
        font-size: var(--text-xl);
    }
}

/* ============================================
   SECTIONS
   ============================================ */

main > section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-2xl);
    text-align: center;
    background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    animation: fadeInDown 0.8s ease-out;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), rgba(0, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(74, 144, 226, 0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite 1s;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
    animation: slideInUp 0.8s ease-out;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 3vw, 1.5rem);
    color: var(--accent);
    margin-bottom: var(--spacing-md);
    animation: slideInUp 0.8s ease-out 0.1s both;
    font-weight: 600;
}

.hero-description {
    font-size: var(--text-lg);
    color: var(--muted);
    margin-bottom: var(--spacing-lg);
    animation: slideInUp 0.8s ease-out 0.2s both;
    line-height: 1.8;
}

.hero-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
    animation: slideInUp 0.8s ease-out 0.3s both;
}

.tag {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.15), rgba(0, 212, 255, 0.1));
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: var(--text-sm);
    border: 1px solid var(--border);
    color: var(--accent);
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: default;
}

.tag:hover {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(74, 144, 226, 0.3);
}

.hero-ctas {
    display: flex;
    gap: var(--spacing-md);
    animation: slideInUp 0.8s ease-out 0.4s both;
    flex-wrap: wrap;
}

.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 8px;
    font-weight: 700;
    font-size: var(--text-sm);
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    display: inline-block;
    text-align: center;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: left var(--transition-fast);
    z-index: -1;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    box-shadow: 0 8px 24px rgba(74, 144, 226, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 32px rgba(74, 144, 226, 0.45);
}

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

.btn-secondary {
    background: var(--surface-2);
    color: var(--accent);
    border: 2px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(74, 144, 226, 0.3);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-circle {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.25), rgba(0, 212, 255, 0.15));
    border: 2px solid var(--accent);
    position: relative;
    animation: float 3.5s ease-in-out infinite;
    box-shadow: 0 0 30px rgba(74, 144, 226, 0.3), inset 0 0 30px rgba(74, 144, 226, 0.1);
}

.hero-circle::before {
    content: '';
    position: absolute;
    inset: -25px;
    border-radius: 50%;
    border: 2px solid var(--accent-2);
    opacity: 0.4;
    animation: rotate 10s linear infinite;
}

.hero-circle::after {
    content: '🔐';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(3rem, 8vw, 5rem);
    animation: pulse 2s ease-in-out infinite;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-xl) 0;
    }

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

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .hero-circle {
        width: 220px;
        height: 220px;
    }

    .hero::before,
    .hero::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-description {
        font-size: 1rem;
    }
}

/* ============================================
   ABOUT SECTION
   ============================================ */

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

.about-text p {
    color: var(--muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    animation: fadeIn 0.8s ease-out;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-card {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1), rgba(0, 212, 255, 0.05));
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s ease;
}

.stat-card:hover::before {
    left: 100%;
}

.stat-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: var(--text-4xl);
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: countUp 0.8s ease-out;
}

.stat-label {
    color: var(--muted);
    margin-top: var(--spacing-sm);
    font-size: var(--text-sm);
    font-weight: 600;
}

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

    .about-stats {
        flex-direction: row;
        gap: var(--spacing-md);
    }

    .stat-card {
        flex: 1;
    }
}

/* ============================================
   SERVICES SECTION
   ============================================ */

.services {
    background: linear-gradient(180deg, var(--surface), transparent);
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.services::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(122, 162, 255, 0.1), transparent);
    border-radius: 50%;
    pointer-events: none;
}

.section-subtitle {
    text-align: center;
    color: var(--muted);
    margin-top: var(--spacing-md);
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-3xl);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.service-card {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), rgba(0, 212, 255, 0.04));
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(74, 144, 226, 0.15);
}

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

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(-5deg);
}

.service-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
}

.service-description {
    flex: 1;
    color: var(--muted);
    font-size: var(--text-sm);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.service-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    display: inline-block;
}

.service-link:hover {
    color: var(--accent-2);
    transform: translateX(4px);
}

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

    .services::before {
        width: 250px;
        height: 250px;
        top: -30%;
        right: -5%;
    }
}

/* ============================================
   BLOG SECTION
   ============================================ */

.blog {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.blog-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
    align-items: center;
}

.blog-search {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.blog-search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-right: var(--spacing-3xl);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.blog-search-input::placeholder {
    color: var(--muted);
}

.blog-search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.search-icon {
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--muted);
    pointer-events: none;
}

.blog-categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.category-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 600;
}

.category-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.category-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.blog-card {
    background: var(--surface);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    animation: slideUp 0.6s ease-out;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border-color: var(--accent);
}

.blog-image {
    width: 100%;
    height: 200px;
    background: var(--surface-2);
}

.blog-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    font-size: var(--text-sm);
}

.blog-category {
    background: rgba(74, 144, 226, 0.15);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 4px;
    font-weight: 600;
}

.blog-date {
    color: var(--muted);
}

.blog-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.blog-excerpt {
    color: var(--muted);
    font-size: var(--text-sm);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.blog-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
    display: inline-block;
}

.blog-link:hover {
    color: var(--accent-2);
    transform: translateX(4px);
}

.blog-card.hidden {
    display: none;
}

@media (max-width: 768px) {
    .blog-controls {
        flex-direction: column;
    }

    .blog-search {
        max-width: 100%;
    }

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

/* ============================================
   CASE STUDIES SECTION
   ============================================ */

.case-studies {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, rgba(124, 58, 237, 0.05), transparent);
    position: relative;
}

.case-studies::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(122, 162, 255, 0.08), transparent);
    border-radius: 50%;
    pointer-events: none;
}

.case-studies-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.case-study-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all var(--transition);
    animation: slideUp 0.6s ease-out;
}

.case-study-card:hover {
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(74, 144, 226, 0.15);
    transform: translateY(-4px);
}

.case-study-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.case-study-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
    margin: 0;
    flex: 1;
    min-width: 200px;
}

.case-study-badge {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: nowrap;
}

.case-study-client {
    color: var(--text);
    font-weight: 600;
    margin: var(--spacing-sm) 0;
    font-size: var(--text-base);
}

.case-study-description {
    color: var(--muted);
    line-height: 1.7;
    margin: var(--spacing-md) 0;
    font-size: var(--text-sm);
}

.case-study-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background: rgba(74, 144, 226, 0.05);
    border-radius: 8px;
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 4px;
}

.metric-label {
    display: block;
    color: var(--muted);
    font-size: var(--text-xs);
}

.case-study-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.tech-tag {
    background: var(--surface-2);
    color: var(--accent);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: var(--text-xs);
    font-weight: 600;
    border: 1px solid rgba(74, 144, 226, 0.2);
}

@media (max-width: 768px) {
    .case-study-card {
        padding: var(--spacing-md);
    }

    .case-study-header {
        flex-direction: column;
    }

    .case-study-metrics {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .case-studies::before {
        width: 300px;
        height: 300px;
        top: -20%;
    }
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */

.timeline {
    position: relative;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding: var(--spacing-xl) 0 var(--spacing-xl) var(--spacing-2xl);
    animation: slideInLeft 0.8s ease-out;
}

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

.timeline-marker {
    position: absolute;
    left: -11px;
    top: var(--spacing-xl);
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border-radius: 50%;
    border: 4px solid var(--bg);
    transition: all var(--transition-fast);
    box-shadow: 0 0 0 4px var(--accent);
}

.timeline-item:hover .timeline-marker {
    width: 32px;
    height: 32px;
    left: -15px;
    box-shadow: 0 0 20px var(--accent);
}

.timeline-content {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), rgba(0, 212, 255, 0.04));
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all var(--transition);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    border-radius: 12px;
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.timeline-content:hover::before {
    opacity: 1;
}

.timeline-content:hover {
    transform: translateX(12px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

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

.experience-header h3 {
    font-size: var(--text-lg);
    color: var(--accent);
    font-weight: 700;
}

.experience-date {
    font-size: var(--text-sm);
    color: var(--muted);
    background: var(--surface);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 6px;
    font-weight: 600;
}

.experience-company {
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
}

.experience-duration {
    font-size: var(--text-sm);
    color: var(--muted);
    margin-bottom: var(--spacing-md);
}

.experience-list {
    list-style: none;
}

.experience-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    color: var(--muted);
    position: relative;
    line-height: 1.7;
}

.experience-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-2);
    font-size: 1.5rem;
}

@media (max-width: 768px) {
    .timeline::before {
        left: -9px;
    }

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

    .timeline-marker {
        left: -14px;
    }

    .experience-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), rgba(0, 212, 255, 0.04));
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all var(--transition);
    animation: slideInUp 0.8s ease-out;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(74, 144, 226, 0.15), transparent);
    transition: top var(--transition);
    z-index: 0;
}

.project-card:hover {
    transform: translateY(-12px);
    border-color: var(--accent);
    box-shadow: var(--shadow);
}

.project-card:hover::before {
    top: 0;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.project-header h3 {
    font-size: var(--text-lg);
    color: var(--text);
    font-weight: 700;
}

.project-year {
    font-size: var(--text-sm);
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 6px;
    font-weight: 700;
}

.project-description {
    color: var(--muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.project-tech {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.tech-tag {
    background: var(--surface);
    color: var(--accent);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 6px;
    font-size: var(--text-sm);
    border: 1px solid var(--border);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.tech-tag:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: translateY(-2px);
}

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

.project-share {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.share-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted);
    width: 36px;
    height: 36px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    transform: translateY(-2px);
}

/* ============================================
   SKILLS SECTION
   ============================================ */

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

.skill-group {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), rgba(124, 58, 237, 0.05));
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    animation: slideInUp 0.8s ease-out;
    transition: all var(--transition);
}

.skill-group:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
    transform: translateY(-4px);
}

.skill-category {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--accent);
    margin-bottom: var(--spacing-md);
}

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

.skill-badge {
    background: var(--surface);
    color: var(--text);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    font-size: var(--text-sm);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
    font-weight: 600;
    cursor: default;
    position: relative;
}

.skill-badge::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    opacity: 0;
    border-radius: 8px;
    transition: opacity var(--transition-fast);
    z-index: -1;
}

.skill-badge:hover {
    color: white;
    border-color: transparent;
    transform: translateY(-3px);
}

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

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

/* ============================================
   EDUCATION SECTION
   ============================================ */

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

.education-card {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(0, 212, 255, 0.05));
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    transition: all var(--transition);
    animation: slideInUp 0.8s ease-out;
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: radial-gradient(circle, rgba(74, 144, 226, 0.2) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition);
}

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

.education-card:hover {
    transform: translateY(-8px);
    border-color: var(--success);
    box-shadow: var(--shadow-md);
}

.education-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    animation: bounce 2s ease-in-out infinite;
}

.education-card h3 {
    font-size: var(--text-lg);
    color: var(--success);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.education-institution {
    color: var(--text);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.education-period {
    color: var(--muted);
    font-size: var(--text-sm);
}

/* ============================================
   FAQ SECTION
   ============================================ */

.faq {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    animation: slideUp 0.6s ease-out;
}

.faq-header {
    width: 100%;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--text);
}

.faq-header:hover {
    background: rgba(74, 144, 226, 0.05);
    color: var(--accent);
}

.faq-item[open] .faq-header {
    background: rgba(74, 144, 226, 0.1);
    color: var(--accent);
    border-bottom: 1px solid var(--border);
}

.faq-title {
    text-align: left;
    flex: 1;
}

.faq-icon {
    font-size: var(--text-xl);
    transition: transform var(--transition-fast);
    color: var(--accent);
}

.faq-item[open] .faq-icon {
    transform: rotate(45deg);
}

.faq-content {
    padding: var(--spacing-lg);
    color: var(--muted);
    line-height: 1.8;
    font-size: var(--text-sm);
    animation: slideDown 0.3s ease-out;
}

.faq-content p {
    margin: 0;
}

@media (max-width: 768px) {
    .faq-header {
        padding: var(--spacing-md);
    }

    .faq-content {
        padding: var(--spacing-md);
    }
}

/* ============================================
   CERTIFICATES SECTION
   ============================================ */

.certificates {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, transparent, rgba(74, 144, 226, 0.05));
    position: relative;
}

.certificates::before {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1), transparent);
    border-radius: 50%;
    pointer-events: none;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.certificate-card {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: slideUp 0.6s ease-out;
}

.certificate-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(74, 144, 226, 0.15);
}

.certificate-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: var(--spacing-lg);
    font-size: var(--text-2xl);
}

.certificate-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--spacing-sm);
}

.certificate-issuer {
    color: var(--accent);
    font-weight: 600;
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-xs);
}

.certificate-date {
    color: var(--muted);
    font-size: var(--text-sm);
    margin-bottom: var(--spacing-md);
}

.certificate-description {
    color: var(--muted);
    font-size: var(--text-sm);
    line-height: 1.6;
    margin: 0;
    flex: 1;
}

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

/* ============================================
   NEWSLETTER SECTION
   ============================================ */

.newsletter {
    background: linear-gradient(135deg, var(--accent), var(--accent-2), rgba(124, 58, 237, 0.8));
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.newsletter::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1), transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.05), transparent 50%);
    pointer-events: none;
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.newsletter-title {
    color: white;
    font-size: var(--text-3xl);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
}

.newsletter-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.newsletter-input-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.newsletter-input {
    flex: 1;
    min-width: 200px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: white;
    border: none;
    border-radius: 8px;
    font-size: var(--text-base);
    color: var(--text);
}

.newsletter-input::placeholder {
    color: var(--muted);
}

.newsletter-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.newsletter-notice {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-sm);
    margin: 0;
}

@media (max-width: 768px) {
    .newsletter {
        padding: var(--spacing-2xl) 0;
    }

    .newsletter-title {
        font-size: var(--text-2xl);
    }

    .newsletter-input-group {
        flex-direction: column;
    }

    .newsletter-input {
        min-width: 100%;
    }
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.08), rgba(124, 58, 237, 0.08), rgba(0, 212, 255, 0.04));
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite;
    pointer-events: none;
}

.contact::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: 5%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
    animation: float 10s ease-in-out infinite 2s;
    pointer-events: none;
}

.contact-description {
    text-align: center;
    color: var(--muted);
    font-size: var(--text-lg);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    position: relative;
    z-index: 1;
    line-height: 1.8;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.contact-card {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    transition: all var(--transition);
    animation: slideInUp 0.8s ease-out;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

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

.contact-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    animation: bounce 2s ease-in-out infinite;
}

.contact-icon:nth-child(n+2) {
    animation-delay: 0.2s;
}

.contact-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--accent);
    font-weight: 700;
}

.contact-link {
    color: var(--text);
    font-weight: 600;
    transition: all var(--transition-fast);
    cursor: pointer;
    position: relative;
    display: inline-block;
}

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

.contact-link:hover::after {
    width: 100%;
}

.contact-link:hover {
    color: var(--accent-2);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--surface);
    border-top: 2px solid var(--border);
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--muted);
    position: relative;
}

.footer p {
    margin: var(--spacing-sm) 0;
    font-weight: 500;
}

.footer-credit {
    font-size: var(--text-sm);
    color: var(--accent);
}

/* ============================================
   ANIMATIONS
   ============================================ */

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-30px);
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

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

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-2xl: 3rem;
    }

    main > section {
        padding: var(--spacing-xl) 0;
    }

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

    .section-title {
        margin-bottom: var(--spacing-xl);
        font-size: 1.75rem;
    }

    .section-title::after {
        width: 50px;
        bottom: -12px;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
        --text-4xl: 2rem;
    }

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

    main > section {
        padding: var(--spacing-lg) 0;
    }

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

    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-lg);
    }

    .section-title::after {
        width: 40px;
        bottom: -10px;
    }

    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.875rem;
    }

    .hero-ctas {
        gap: var(--spacing-sm);
    }

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

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

    .contact-methods {
        grid-template-columns: 1fr;
    }

    .education-items {
        grid-template-columns: 1fr;
    }

    .stat-card {
        padding: var(--spacing-md);
    }

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

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .header,
    .footer,
    .hero-ctas,
    .theme-toggle {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    main > section {
        page-break-inside: avoid;
        padding: var(--spacing-lg) 0;
    }
}

/* ============================================
   PARTICLE BACKGROUND
   ============================================ */

.particle-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.3;
}

/* ============================================
   SOCIAL LINKS
   ============================================ */

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

.social-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(74, 144, 226, 0.1);
    color: var(--accent);
    border: 1px solid var(--border);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.social-icon:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(74, 144, 226, 0.3);
}

.social-icon svg {
    width: 20px;
    height: 20px;
}

/* ============================================
   PROJECT FILTERS & SEARCH
   ============================================ */

.project-filters {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 2px solid var(--border);
    background: transparent;
    color: var(--muted);
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

.project-search {
    position: relative;
    max-width: 400px;
    margin: 0 auto var(--spacing-xl);
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    padding-right: 3rem;
    border: 2px solid var(--border);
    background: var(--surface);
    color: var(--text);
    border-radius: 12px;
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(74, 144, 226, 0.3);
}

.search-icon {
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
}

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

.project-link {
    flex: 1;
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--surface);
    color: var(--accent);
    border-radius: 6px;
    transition: all var(--transition-fast);
    font-weight: 600;
}

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

/* ============================================
   SKILLS PROGRESS BARS
   ============================================ */

.skill-item {
    margin-bottom: var(--spacing-md);
}

.skill-progress {
    height: 6px;
    background: rgba(74, 144, 226, 0.1);
    border-radius: 3px;
    margin-top: var(--spacing-xs);
    overflow: hidden;
}

.skill-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    border-radius: 3px;
    width: 0%;
    animation: fillProgress 1.5s ease-out forwards;
}

@keyframes fillProgress {
    from { width: 0%; }
    to { width: 100%; }
}

/* ============================================
   TESTIMONIALS CAROUSEL
   ============================================ */

.testimonials {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.06), rgba(124, 58, 237, 0.06));
    position: relative;
    overflow: hidden;
}

.testimonials-carousel {
    position: relative;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    min-height: 300px;
}

.testimonial-card {
    background: var(--surface);
    padding: var(--spacing-lg);
    border-radius: 12px;
    border: 1px solid var(--border);
    opacity: 0;
    transition: all var(--transition) cubic-bezier(0.68, -0.55, 0.265, 1.55);
    transform: translateX(100px) rotateY(45deg);
    position: absolute;
    width: 100%;
    pointer-events: none;
}

.testimonial-card.active {
    opacity: 1;
    transform: translateX(0) rotateY(0deg);
    position: relative;
    pointer-events: auto;
    z-index: 2;
}

.testimonial-card.prev {
    transform: translateX(-100px) rotateY(-45deg);
    opacity: 0;
}

.testimonial-stars {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
}

.testimonial-text {
    font-size: var(--text-lg);
    color: var(--muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    font-style: italic;
}

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

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.author-name {
    font-weight: 700;
    color: var(--text);
}

.author-title {
    font-size: var(--text-sm);
    color: var(--muted);
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.carousel-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--surface-2);
    border: 2px solid var(--border);
    color: var(--accent);
    cursor: pointer;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
}

.carousel-btn:hover {
    background: var(--accent);
    color: white;
    transform: scale(1.1);
}

.carousel-dots {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background: var(--accent);
    width: 24px;
    border-radius: 4px;
}

/* ============================================
   CONTACT FORM
   ============================================ */

.contact-form {
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--surface-2);
    border: 2px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    font-family: inherit;
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--surface);
    box-shadow: 0 0 20px rgba(74, 144, 226, 0.2);
}

.form-error {
    font-size: var(--text-sm);
    color: #ef4444;
    margin-top: var(--spacing-xs);
    display: none;
}

.form-error.show {
    display: block;
}

.btn-submit {
    width: 100%;
}

.form-status {
    text-align: center;
    font-weight: 600;
    display: none;
    animation: slideInUp 0.3s ease-out;
}

.form-status.show {
    display: block;
}

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

.btn-tertiary:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-3px);
}


/* ============================================
   PHASE 1: PREMIUM FOUNDATION FEATURES
   ============================================ */

/* PAGE LOADER STYLES */
.page-loader {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.6s ease-out, visibility 0.6s ease-out;
}

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

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

.loader-circle {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(74, 144, 226, 0.2);
    border-top-color: var(--accent);
    border-right-color: var(--accent-2);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loader-text {
    color: var(--muted);
    font-size: var(--text-sm);
    font-weight: 600;
    letter-spacing: 1px;
}

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

/* SCROLL PROGRESS BAR */
.scroll-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    width: 0%;
    z-index: 1000;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px rgba(74, 144, 226, 0.5);
}

/* MOBILE MENU TOGGLE */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: 100;
    gap: 6px;
}

.mobile-menu-toggle .hamburger {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-toggle .hamburger span {
    width: 24px;
    height: 3px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* MOBILE MENU */
.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    z-index: 99;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    animation: slideInDown 0.3s ease-out;
}

.mobile-menu[aria-hidden="false"] {
    display: block;
}

.mobile-menu-list {
    list-style: none;
    padding: var(--spacing-md) 0;
}

.mobile-nav-link {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text);
    font-weight: 600;
    border-left: 4px solid transparent;
    transition: all var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link[aria-current="true"] {
    background: var(--surface-2);
    color: var(--accent);
    border-left-color: var(--accent);
    padding-left: calc(var(--spacing-lg) + 8px);
}

/* CUSTOM CURSOR */
.custom-cursor {
    pointer-events: none;
    position: fixed;
    width: 30px;
    height: 30px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    z-index: 9999;
    transition: all 0.1s ease-out;
    opacity: 0.8;
}

.custom-cursor.active {
    width: 50px;
    height: 50px;
    background: rgba(74, 144, 226, 0.2);
    border-color: var(--accent-2);
}

a, button, [role="button"], .clickable {
    cursor: none;
}

html {
    cursor: none;
}

/* MOBILE RESPONSIVE */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .navigation {
        display: none !important;
    }

    .header-content {
        gap: var(--spacing-sm);
        padding: var(--spacing-md) 0;
    }
}

/* BREADCRUMB NAVIGATION */
.breadcrumbs {
    padding: var(--spacing-md) 0;
    font-size: var(--text-sm);
    color: var(--muted);
}

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

.breadcrumb-list a {
    color: var(--accent);
    transition: all var(--transition-fast);
}

.breadcrumb-list a:hover {
    color: var(--accent-2);
    text-decoration: underline;
}

.breadcrumb-separator {
    color: var(--border);
}

.breadcrumb-current {
    color: var(--text);
    font-weight: 600;
}