/* ===== CSS Variables & Theme ===== */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a24;
    --color-surface: #1e1e2a;
    --color-border: #2a2a3a;
    --color-border-light: #3a3a4a;

    --color-text: #e4e4e7;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;

    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-primary-glow: rgba(99, 102, 241, 0.4);

    --color-accent: #22d3ee;
    --color-accent-glow: rgba(34, 211, 238, 0.3);

    --color-success: #10b981;
    --color-warning: #f59e0b;

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

    /* Spacing */
    --section-padding: clamp(4rem, 10vw, 8rem);
    --container-max: 1200px;
    --container-padding: clamp(1rem, 5vw, 2rem);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

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

ul, ol {
    list-style: none;
}

/* ===== Background Effects ===== */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--color-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.15;
    pointer-events: none;
    z-index: -2;
}

.bg-glow {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 20%, var(--color-primary-glow) 0%, transparent 40%),
                radial-gradient(circle at 70% 80%, var(--color-accent-glow) 0%, transparent 40%);
    opacity: 0.4;
    pointer-events: none;
    z-index: -1;
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(2%, 2%) rotate(1deg); }
    50% { transform: translate(-1%, 3%) rotate(-1deg); }
    75% { transform: translate(-2%, -1%) rotate(0.5deg); }
}

/* ===== Container & Layout ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition-base);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
}

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

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    transition: var(--transition-fast);
}

.nav-logo:hover {
    color: var(--color-primary-light);
}

.logo-bracket {
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-base);
}

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

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

.nav-link-cta {
    color: var(--color-primary-light);
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
}

.nav-link-cta::after {
    display: none;
}

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

/* Language Selector */
.lang-selector {
    display: flex;
    gap: 0.25rem;
    margin-left: 1rem;
}

.lang-btn {
    font-size: 1.25rem;
    padding: 0.25rem 0.4rem;
    border-radius: var(--radius-sm);
    opacity: 0.5;
    transition: var(--transition-fast);
    cursor: pointer;
    background: transparent;
    border: 2px solid transparent;
}

.lang-btn:hover {
    opacity: 0.8;
    background: var(--color-surface);
}

.lang-btn.active {
    opacity: 1;
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    padding: 8rem var(--container-padding) 4rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-success);
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
}

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

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

.hero-greeting {
    display: block;
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.hero-title {
    margin-bottom: 1rem;
}

.hero-name {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary-light) 50%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--color-primary-light);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.typing-cursor {
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 20px var(--color-primary-glow);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-primary-glow);
}

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

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

/* ===== Hero Stats ===== */
.hero-stats {
    display: flex;
    gap: 2.5rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
}

.stat-number::after {
    content: '+';
    color: var(--color-primary);
}

.stat:last-child .stat-number::after {
    content: '';
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ===== Code Window ===== */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.code-window {
    width: 100%;
    max-width: 480px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.05) inset;
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    transition: var(--transition-slow);
}

.code-window:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.code-dots {
    display: flex;
    gap: 6px;
}

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

.code-dots span:nth-child(1) { background: #ff5f56; }
.code-dots span:nth-child(2) { background: #ffbd2e; }
.code-dots span:nth-child(3) { background: #27ca40; }

.code-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.code-content {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    overflow-x: auto;
}

.code-keyword { color: #c792ea; }
.code-class { color: #ffcb6b; }
.code-function { color: #82aaff; }
.code-string { color: #c3e88d; }

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.about-text {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.about-text strong {
    color: var(--color-text);
}

.about-interests {
    margin-top: 2rem;
}

.about-interests h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: 0.85rem;
    padding: 0.5rem 1rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

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

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

.frame-decoration {
    position: absolute;
    inset: -15px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    opacity: 0.3;
    transform: rotate(6deg);
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    filter: grayscale(20%);
    transition: var(--transition-base);
}

.profile-photo:hover {
    filter: grayscale(0%);
    border-color: var(--color-primary);
    box-shadow: 0 0 30px var(--color-primary-glow);
}

.profile-placeholder {
    width: 100%;
    height: 100%;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
}

.profile-placeholder svg {
    width: 120px;
    height: 120px;
    opacity: 0.5;
}

.profile-placeholder span {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    margin-top: 1rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== Expertise Section ===== */
.expertise {
    background: linear-gradient(180deg, transparent 0%, var(--color-bg-secondary) 20%, var(--color-bg-secondary) 80%, transparent 100%);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.expertise-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition-base);
}

.expertise-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.card-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.expertise-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.expertise-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.card-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.card-list li {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-muted);
    padding: 0.35rem 0.75rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

/* ===== Experience Timeline ===== */
.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.timeline-item {
    position: relative;
    padding-left: 3rem;
    padding-bottom: 3rem;
}

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

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    background: var(--color-primary);
    border: 3px solid var(--color-bg);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.timeline-content {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-border-light);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-primary-light);
    margin-bottom: 0.5rem;
    display: block;
}

.timeline-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-company {
    font-size: 0.95rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
    display: block;
}

.timeline-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* ===== Projects Section ===== */
.projects {
    background: linear-gradient(180deg, transparent 0%, var(--color-bg-secondary) 50%, transparent 100%);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.project-card {
    background: var(--color-surface);
    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(-4px);
}

.project-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
}

.project-image {
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.project-placeholder {
    width: 100px;
    height: 100px;
    color: var(--color-text-muted);
    opacity: 0.5;
}

.project-content {
    padding: 2rem;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.project-tags span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary-light);
    border-radius: var(--radius-sm);
}

.project-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.project-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    color: var(--color-primary-light);
    transition: var(--transition-fast);
}

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

/* ===== Contact Section ===== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info .section-tag {
    margin-bottom: 1rem;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 1.5rem;
}

.contact-text {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--color-surface);
    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(8px);
}

.method-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.method-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary-light);
}

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

.method-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.method-value {
    font-weight: 500;
}

.contact-social {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.contact-social h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

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

.social-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-4px);
}

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

/* ===== Footer ===== */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--color-border);
}

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

.footer-brand {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

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

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .code-window {
        transform: none;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-image {
        order: -1;
    }

    .project-card.featured {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--color-bg);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: var(--transition-base);
    }

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

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .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(5px, -5px);
    }

    .lang-selector {
        position: absolute;
        top: 1rem;
        right: 4rem;
        margin-left: 0;
    }

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

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

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat {
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

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

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

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

.hero-content > *,
.section-header,
.expertise-card,
.timeline-item,
.project-card {
    animation: fadeInUp 0.6s ease backwards;
}

.hero-content > *:nth-child(1) { animation-delay: 0.1s; }
.hero-content > *:nth-child(2) { animation-delay: 0.2s; }
.hero-content > *:nth-child(3) { animation-delay: 0.3s; }
.hero-content > *:nth-child(4) { animation-delay: 0.4s; }
.hero-content > *:nth-child(5) { animation-delay: 0.5s; }
.hero-content > *:nth-child(6) { animation-delay: 0.6s; }

.expertise-card:nth-child(1) { animation-delay: 0.1s; }
.expertise-card:nth-child(2) { animation-delay: 0.2s; }
.expertise-card:nth-child(3) { animation-delay: 0.3s; }
.expertise-card:nth-child(4) { animation-delay: 0.4s; }
.expertise-card:nth-child(5) { animation-delay: 0.5s; }

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }

/* ===== Certifications Section ===== */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.certification-card {
    display: flex;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.certification-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.15);
    transform: translateY(-4px);
}

.certification-badge {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-md);
}

.certification-badge svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.certification-content {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.certification-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
    margin: 0;
}

.certification-issuer {
    font-size: 0.9rem;
    color: var(--color-primary-light);
    font-weight: 500;
}

.certification-date {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.certification-id {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.certification-card:nth-child(1) { animation-delay: 0.1s; }
.certification-card:nth-child(2) { animation-delay: 0.2s; }
.certification-card:nth-child(3) { animation-delay: 0.3s; }

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

    .certification-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

/* ===== Education Section ===== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.education-card {
    display: flex;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.education-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.education-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.education-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-primary-light);
}

.education-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 0.25rem 0;
}

.education-degree {
    font-size: 0.9rem;
    color: var(--color-primary-light);
    font-weight: 500;
}

.education-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

/* ===== Associations Section ===== */
.associations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.association-card {
    display: flex;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.association-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 10px 40px rgba(34, 211, 238, 0.1);
}

.association-badge {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.75rem;
    color: white;
    text-align: center;
    line-height: 1.2;
}

.association-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 0.25rem 0;
}

.association-org {
    font-size: 0.85rem;
    color: var(--color-accent);
    font-weight: 500;
}

.association-content p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0.5rem 0 0 0;
    line-height: 1.5;
}

/* ===== Languages Section ===== */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.language-card {
    display: flex;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
}

.language-card:hover {
    border-color: var(--color-primary);
}

.language-flag {
    font-size: 2.5rem;
    line-height: 1;
}

.language-info {
    flex: 1;
}

.language-info h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 0.25rem 0;
}

.language-level {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.language-bar {
    margin-top: 0.75rem;
    height: 6px;
    background: var(--color-bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.language-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: 3px;
    transition: width 1s ease-out;
}

@media (max-width: 768px) {
    .education-grid,
    .associations-grid,
    .languages-grid {
        grid-template-columns: 1fr;
    }

    .education-card,
    .association-card {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ===== Contact Form ===== */
.contact-form-wrapper {
    flex: 1;
    max-width: 500px;
}

.contact-form-wrapper h3 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: 1.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    width: 100%;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

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

.form-submit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-base);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.form-status {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #22c55e;
}

.form-status.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.contact-form-wrapper .social-links {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
}

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

    .contact-form-wrapper {
        max-width: 100%;
    }
}

/* ===== Cookie Banner ===== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.4);
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.cookie-banner.visible {
    transform: translateY(0);
}

.cookie-banner.hidden {
    display: none;
}

.cookie-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 1.5rem var(--container-padding);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.5rem;
}

.cookie-text {
    flex: 1;
    min-width: 300px;
}

.cookie-text h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.cookie-text p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0;
}

.cookie-policy-link {
    color: var(--color-primary-light);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: var(--transition-fast);
}

.cookie-policy-link:hover {
    color: var(--color-accent);
}

.cookie-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.cookie-btn {
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

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

.cookie-btn-primary:hover {
    background: var(--color-primary-dark);
}

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

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

/* Cookie Settings Panel */
.cookie-settings-panel {
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.cookie-settings-panel:not([hidden]) {
    max-height: 500px;
}

.cookie-settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--container-padding);
    max-width: var(--container-max);
    margin: 0 auto;
    border-bottom: 1px solid var(--color-border);
}

.cookie-settings-header h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0;
}

.cookie-settings-close {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.cookie-settings-close:hover {
    color: var(--color-text);
    background: var(--color-bg-tertiary);
}

.cookie-settings-body {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 1rem var(--container-padding);
}

.cookie-category {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
}

.cookie-category:last-child {
    border-bottom: none;
}

.cookie-category-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

.cookie-category-info {
    flex: 1;
}

.cookie-category-info h5 {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0 0 0.25rem 0;
    color: var(--color-text);
}

.cookie-category-info p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0;
    line-height: 1.4;
}

/* Toggle Switch */
.cookie-toggle {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
}

.cookie-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.cookie-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 26px;
    transition: var(--transition-base);
}

.cookie-toggle-slider::before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background: var(--color-text-muted);
    border-radius: 50%;
    transition: var(--transition-base);
}

.cookie-toggle input:checked + .cookie-toggle-slider {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.cookie-toggle input:checked + .cookie-toggle-slider::before {
    transform: translateX(22px);
    background: white;
}

.cookie-toggle input:focus + .cookie-toggle-slider {
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.cookie-toggle-disabled {
    opacity: 0.6;
}

.cookie-toggle-disabled .cookie-toggle-slider {
    cursor: not-allowed;
}

.cookie-settings-footer {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 1rem var(--container-padding);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
}

/* Responsive Cookie Banner */
@media (max-width: 768px) {
    .cookie-content {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .cookie-text {
        min-width: 100%;
    }

    .cookie-actions {
        justify-content: center;
    }

    .cookie-btn {
        flex: 1;
        min-width: 120px;
    }

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

    .cookie-toggle {
        margin-top: 0.75rem;
    }
}