/* ============================================
   CSS CUSTOM PROPERTIES (Design System)
   ============================================ */
:root {
    /* Colors - Refined Professional Palette */
    --color-primary: #1a3a52;
    --color-primary-light: #2d5573;
    --color-primary-dark: #0f2537;
    --color-accent: #d4a574;
    --color-accent-light: #e6c299;
    
    --color-text: #2c3e50;
    --color-text-light: #5a6c7d;
    --color-text-muted: #8394a5;
    
    --color-bg: #fafbfc;
    --color-bg-alt: #ffffff;
    --color-bg-dark: #f0f3f5;
    
    --color-border: #e1e8ed;
    --color-shadow: rgba(26, 58, 82, 0.08);
    
    /* Typography */
    --font-primary: 'Work Sans', -apple-system, system-ui, sans-serif;
    --font-display: 'Crimson Pro', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    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: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }

p {
    margin-bottom: 1rem;
}

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

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

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px var(--color-shadow);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-shadow);
}

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

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

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px var(--color-shadow);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition);
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    opacity: 0.3;
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(212, 165, 116, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.hero-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--color-accent);
    margin-bottom: 1rem;
    animation: fadeIn 1s ease-out 0.2s both;
}

.hero-title {
    margin-bottom: 1.5rem;
}

.hero-name {
    display: block;
    font-size: 4.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeIn 1s ease-out 0.4s both;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 1.5rem;
    animation: fadeIn 1s ease-out 0.6s both;
}

.hero-location {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    animation: fadeIn 1s ease-out 0.8s both;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    animation: fadeIn 1s ease-out 1s both;
}

.hero-scroll {
    animation: fadeIn 1s ease-out 1.2s both;
}

.hero-scroll a {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-scroll span {
    width: 2px;
    height: 30px;
    background-color: var(--color-accent);
    animation: scrollDown 2s infinite;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
}

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

.about-text {
    font-size: 1.05rem;
}

.about-intro {
    font-size: 1.15rem;
    color: var(--color-text);
    margin-bottom: 1.5rem;
}

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

.highlight-item {
    display: flex;
    gap: 1rem;
}

.highlight-item i {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-top: 0.25rem;
}

.highlight-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.highlight-item p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin: 0;
}

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

.stat-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    color: white;
    box-shadow: 0 4px 20px var(--color-shadow);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px var(--color-shadow);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-dark);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-category {
    background-color: var(--color-bg-alt);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px var(--color-shadow);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--color-shadow);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-accent) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.category-icon i {
    font-size: 1.75rem;
    color: white;
}

.category-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

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

.skill-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg-dark);
    color: var(--color-text);
    font-size: 0.875rem;
    border-radius: 20px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.skill-tag:hover {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.experience {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
}

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

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

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

.timeline-dot {
    position: absolute;
    left: -3.5rem;
    top: 0;
    width: 16px;
    height: 16px;
    background-color: var(--color-accent);
    border: 3px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--color-bg-dark);
}

.timeline-content {
    background-color: var(--color-bg-alt);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 15px var(--color-shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: 0 4px 25px var(--color-shadow);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.job-title {
    font-size: 1.4rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.company-name {
    font-size: 1.1rem;
    color: var(--color-accent);
    font-weight: 500;
}

.job-duration {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    font-weight: 500;
    white-space: nowrap;
}

.job-achievements {
    list-style: none;
    padding-left: 0;
}

.job-achievements li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-light);
}

.job-achievements li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-dark);
}

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

.project-card {
    background-color: var(--color-bg-alt);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 15px var(--color-shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px var(--color-shadow);
}

.project-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.project-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-icon i {
    font-size: 1.5rem;
    color: white;
}

.project-title {
    font-size: 1.3rem;
    color: var(--color-primary);
    flex: 1;
}

.project-description {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.tech-tag {
    padding: 0.4rem 0.9rem;
    background-color: var(--color-bg-dark);
    color: var(--color-primary);
    font-size: 0.85rem;
    border-radius: 15px;
    font-weight: 500;
}

.project-impact {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-accent);
    font-weight: 500;
}

.project-impact i {
    color: var(--color-accent);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

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

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-method i {
    font-size: 1.5rem;
    color: var(--color-accent);
    margin-top: 0.25rem;
}

.method-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
}

.contact-method a {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-primary);
}

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

.social-link {
    width: 45px;
    height: 45px;
    background-color: var(--color-bg-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--color-accent);
    transform: translateY(-3px);
}

.social-link i {
    color: var(--color-text);
    font-size: 1.2rem;
}

.social-link:hover i {
    color: white;
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--color-bg-dark);
    padding: 2.5rem;
    border-radius: var(--border-radius);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: var(--font-primary);
    font-size: 1rem;
    background-color: white;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--color-text-muted);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.75rem;
    font-size: 0.75rem;
    background-color: white;
    padding: 0 0.5rem;
    color: var(--color-accent);
}

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

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--color-primary-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text p {
    margin: 0;
    opacity: 0.9;
}

.footer-tagline {
    font-size: 0.875rem;
    opacity: 0.7;
}

.footer-links a {
    color: white;
    font-weight: 500;
    opacity: 0.9;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-accent);
}

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

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

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 968px) {
    html {
        font-size: 14px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background-color: white;
        width: 100%;
        padding: 2rem;
        box-shadow: 0 4px 20px var(--color-shadow);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-name {
        font-size: 3rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-highlights {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline {
        padding-left: 2rem;
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 2rem;
    }
}