/* ========================================
   CSS Variables & Reset
   ======================================== */

:root {
    /* Colors - Professional palette inspired by data & cartography */
    --color-primary: #0066cc;
    --color-primary-dark: #004d99;
    --color-secondary: #00cc99;
    --color-accent: #ff6b35;
    --color-dark: #1a1a2e;
    --color-text: #2d3436;
    --color-text-light: #636e72;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e1e8ed;
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-display);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    font-family: var(--font-mono);
}

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

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    transition: var(--transition);
    border-radius: 2px;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 70px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    opacity: 0.4;
}

.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(90deg, rgba(0, 102, 204, 0.03) 1px, transparent 1px),
        linear-gradient(rgba(0, 102, 204, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

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

.hero-subtitle {
    display: block;
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-main {
    display: block;
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 2px;
    height: 50px;
    background: linear-gradient(to bottom, transparent, var(--color-primary));
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

/* ========================================
   Buttons
   ======================================== */

.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--font-display);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(0, 102, 204, 0.3);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 204, 0.4);
}

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

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

/* ========================================
   Services Section
   ======================================== */

.services {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg);
}

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

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

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

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

.service-icon {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    transition: var(--transition);
}

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

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    padding: 0.5rem 0;
    color: var(--color-text-light);
    position: relative;
    padding-left: 1.5rem;
}

.service-card li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
}

/* ========================================
   Expertise Section
   ======================================== */

.expertise {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-alt);
}

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

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

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

.expertise-intro {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    align-items: center;
}

.profile-placeholder {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.profile-text h3 {
    font-size: 1.8rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.profile-text p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.certifications {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--spacing-lg) 0;
}

.cert-badge {
    background: white;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    transition: var(--transition);
}

.cert-badge:hover {
    background: var(--color-primary);
    color: white;
    transform: scale(1.05);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.skill-domain {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.skill-domain h4 {
    font-size: 1.3rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.skill-tags span {
    background: var(--color-bg-alt);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--color-text);
    transition: var(--transition);
}

.skill-tags span:hover {
    background: var(--color-primary);
    color: white;
    transform: translateX(5px);
}

.cta-section {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.cta-section h3 {
    font-size: 1.8rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   Examples Section
   ======================================== */

.examples {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg);
}

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

.example-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 1px solid var(--color-border);
}

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

.example-number {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--color-secondary);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    font-family: var(--font-mono);
    box-shadow: var(--shadow-sm);
}

.example-card h4 {
    font-size: 1.3rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.example-card p {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ========================================
   Contact Section
   ======================================== */

.contact {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-alt);
}

.contact-wrapper {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-dark);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--color-bg);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--color-dark);
    color: white;
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer p {
    margin: 0;
    opacity: 0.8;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .expertise-intro {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .profile-placeholder {
        margin: 0 auto;
    }
    
    .hero-main {
        font-size: 2rem;
    }
    
    .services-grid,
    .skills-grid,
    .examples-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .service-card,
    .example-card,
    .skill-domain {
        padding: var(--spacing-md);
    }
}

/* ========================================
   Animations & Interactions
   ======================================== */

@media (prefers-reduced-motion: no-preference) {
    .service-card,
    .example-card,
    .skill-domain,
    .cert-badge {
        animation: fadeIn 0.6s ease-out backwards;
    }
    
    .service-card:nth-child(1) { animation-delay: 0.1s; }
    .service-card:nth-child(2) { animation-delay: 0.2s; }
    .service-card:nth-child(3) { animation-delay: 0.3s; }
    
    .example-card:nth-child(1) { animation-delay: 0.1s; }
    .example-card:nth-child(2) { animation-delay: 0.2s; }
    .example-card:nth-child(3) { animation-delay: 0.3s; }
    .example-card:nth-child(4) { animation-delay: 0.4s; }
}

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