/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    /* Colors */
    --primary: #1a365d;
    --primary-light: #2c5282;
    --primary-dark: #0d1b2a;
    --accent: #d4af37;
    --accent-light: #e5c158;
    --accent-dark: #b8941f;
    
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --text-white: #ffffff;
    
    --bg-white: #ffffff;
    --bg-light: #f7fafc;
    --bg-dark: #1a202c;
    --bg-gradient: linear-gradient(135deg, #1a365d 0%, #2c5282 50%, #1a365d 100%);
    
    --border-light: #e2e8f0;
    --border-medium: #cbd5e0;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.5em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

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

ul {
    list-style: none;
}

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

/* ===================================
   Utility Classes
   =================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: var(--primary-dark);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--text-white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1rem;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(26, 54, 93, 0.98);
    backdrop-filter: blur(10px);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-white);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    position: relative;
}

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

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

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

.nav-cta {
    padding: 10px 24px;
    background: var(--accent);
    color: var(--primary-dark) !important;
    border-radius: var(--radius-md);
}

.nav-cta:hover {
    background: var(--accent-light);
}

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

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

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

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--bg-gradient);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(44, 82, 130, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(26, 54, 93, 0.5) 0%, transparent 70%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 24px;
    max-width: 900px;
}

.hero-text {
    margin-bottom: 60px;
}

.hero-greeting {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.hero-title {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    margin-bottom: 24px;
}

.hero-title span {
    color: var(--accent);
    font-weight: 600;
}

.hero-location {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    margin-bottom: 40px;
}

.hero-location i {
    color: var(--accent);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1;
}

.stat-plus {
    font-size: 2rem;
    color: var(--accent);
    font-weight: 700;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 8px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 38px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

/* ===================================
   Section Headers
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-dark);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    color: var(--primary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   About Section
   =================================== */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text .lead {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.about-text p {
    font-size: 1rem;
    line-height: 1.8;
}

.about-languages {
    background: var(--bg-white);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.about-languages h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary);
    margin-bottom: 24px;
    font-size: 1.1rem;
}

.about-languages h3 i {
    color: var(--accent);
}

.language-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.language-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.language-level {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 6px 14px;
    border-radius: var(--radius-sm);
}

.language-level.native {
    background: var(--primary);
    color: var(--text-white);
}

.language-level.fluent {
    background: var(--accent);
    color: var(--primary-dark);
}

.language-names {
    font-weight: 500;
    color: var(--text-primary);
}

/* ===================================
   Competencies Section
   =================================== */
.competencies-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.competency-card {
    background: var(--bg-white);
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--border-light);
}

.competency-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.competency-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.competency-icon i {
    font-size: 1.5rem;
    color: var(--text-white);
}

.competency-card h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.competency-card ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.competency-card li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding-left: 16px;
    position: relative;
}

.competency-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

/* ===================================
   Experience Section
   =================================== */
.experience {
    background: var(--bg-light);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent) 0%, var(--primary) 100%);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-left: 50px;
    padding-bottom: 50px;
}

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

.timeline-marker {
    position: absolute;
    left: -7px;
    top: 0;
    width: 17px;
    height: 17px;
    background: var(--accent);
    border: 3px solid var(--bg-light);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.timeline-content {
    background: var(--bg-white);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
}

.timeline-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-dark);
    background: rgba(212, 175, 55, 0.1);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
}

.timeline-type {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary);
    background: rgba(26, 54, 93, 0.1);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
}

.timeline-title {
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.timeline-company {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.timeline-company i {
    color: var(--accent);
}

.timeline-achievements {
    margin-bottom: 20px;
}

.timeline-achievements li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
    margin-bottom: 12px;
    line-height: 1.7;
}

.timeline-achievements li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary);
    background: rgba(26, 54, 93, 0.08);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
}

/* ===================================
   Education Section
   =================================== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.education-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-md);
    display: flex;
    gap: 24px;
    transition: var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.education-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.education-icon i {
    font-size: 1.5rem;
    color: var(--text-white);
}

.education-content {
    flex: 1;
}

.education-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-dark);
    background: rgba(212, 175, 55, 0.1);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    display: inline-block;
    margin-bottom: 12px;
}

.education-content h3 {
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: 4px;
}

.education-content h4 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.education-institution {
    font-size: 0.9rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.education-institution i {
    color: var(--accent);
}

.certifications {
    background: var(--bg-light);
    padding: 36px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.certifications h3 {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
    margin-bottom: 24px;
}

.certifications h3 i {
    color: var(--accent);
}

.cert-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
}

.cert-item {
    background: var(--bg-white);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

/* ===================================
   Contact Section
   =================================== */
.contact {
    background: var(--bg-gradient);
    color: var(--text-white);
}

.contact .section-tag {
    color: var(--accent);
}

.contact .section-title {
    color: var(--text-white);
}

.contact .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.25rem;
    color: var(--primary-dark);
}

.contact-details h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-details a,
.contact-details span {
    font-size: 1rem;
    color: var(--text-white);
}

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

.cta-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
}

.cta-card h3 {
    font-size: 1.5rem;
    color: var(--text-white);
    margin-bottom: 16px;
}

.cta-card p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 32px;
    line-height: 1.8;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-dark);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-top: 8px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-normal);
}

.footer-social a:hover {
    background: var(--accent);
    color: var(--primary-dark);
}

.footer-bottom {
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85rem;
}

/* ===================================
   Animations
   =================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .competencies-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--primary-dark);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 40px 40px;
        gap: 24px;
        transition: var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }
    
    .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);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .competencies-grid {
        grid-template-columns: 1fr;
    }
    
    .education-grid {
        grid-template-columns: 1fr;
    }
    
    .education-card {
        flex-direction: column;
        text-align: center;
    }
    
    .education-icon {
        margin: 0 auto;
    }
    
    .timeline::before {
        left: 8px;
    }
    
    .timeline-item {
        padding-left: 40px;
    }
    
    .timeline-marker {
        left: 0;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .cert-list {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }
    
    .timeline-content {
        padding: 24px 20px;
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .cta-card {
        padding: 32px 24px;
    }
}