/* ============================================================================
   Portfolio Website Styles
   ============================================================================ */

/* CSS Reset & Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #111827;
    --border-color: #e5e7eb;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;

    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

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

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

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

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

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

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

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

.hamburger span {
    display: block;
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="rgba(255,255,255,0.05)" width="1200" height="600"/></svg>');
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 4vw, 1.75rem);
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.hero-description {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
    opacity: 0.85;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

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

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

.btn-small {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

/* ============================================================================
   Sections
   ============================================================================ */

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

.section-title {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* ============================================================================
   About Section
   ============================================================================ */

.about {
    background: var(--bg-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.about-image {
    position: relative;
}

.headshot {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    object-fit: cover;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.skills {
    margin-top: var(--spacing-lg);
}

.skills h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.skill-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 24px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
}

.skill-tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* ============================================================================
   Experience Section
   ============================================================================ */

.experience {
    background: var(--bg-primary);
    overflow: hidden;
}

.experience-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-top: -20px;
    margin-bottom: 10px;
    font-size: 0.875rem;
}

.experience-wrapper {
    position: relative;
    margin-top: var(--spacing-lg);
}

.experience-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(99, 102, 241, 0.9);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.experience-nav:hover {
    background: rgba(79, 70, 229, 1);
    transform: translateY(-50%) scale(1.1);
}

.experience-nav-left {
    left: -25px;
}

.experience-nav-right {
    right: -25px;
}

.experience-grid {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 20px 0 40px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.experience-grid::-webkit-scrollbar {
    height: 10px;
}

.experience-grid::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 10px;
}

.experience-grid::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
}

.experience-grid::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

.experience-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    min-width: 420px;
    max-width: 420px;
    flex-shrink: 0;
    scroll-snap-align: center;
}

.experience-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.experience-image {
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.experience-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.experience-icon {
    font-size: 4rem;
}

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

.experience-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.experience-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.experience-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.exp-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 500;
    color: #059669;
}

.experience-highlights {
    margin-bottom: var(--spacing-sm);
}

.experience-highlights ul {
    list-style: none;
    padding-left: 0;
}

.experience-highlights li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.experience-highlights li::before {
    content: '▸';
    color: #10b981;
    font-weight: bold;
    margin-right: 0.5rem;
}

.experience-placeholder-card {
    opacity: 0.7;
}

.experience-placeholder-card .experience-image {
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
}

/* ============================================================================
   Projects Section
   ============================================================================ */

.projects {
    background: var(--bg-primary);
    overflow: hidden;
}

.projects-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-top: -20px;
    margin-bottom: 10px;
    font-size: 0.875rem;
}

.projects-wrapper {
    position: relative;
    margin-top: var(--spacing-lg);
}

.project-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(99, 102, 241, 0.9);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 2rem;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-nav:hover {
    background: rgba(79, 70, 229, 1);
    transform: translateY(-50%) scale(1.1);
}

.project-nav-left {
    left: -25px;
}

.project-nav-right {
    right: -25px;
}

.projects-grid {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: 20px 0 40px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.projects-grid::-webkit-scrollbar {
    height: 10px;
}

.projects-grid::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 10px;
}

.projects-grid::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
}

.projects-grid::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

.project-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    min-width: 380px;
    max-width: 380px;
    flex-shrink: 0;
    scroll-snap-align: center;
}

.project-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.project-image {
    width: 100%;
    height: 240px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-icon {
    font-size: 5rem;
}

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

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary-color);
}

.project-features {
    margin-bottom: var(--spacing-md);
}

.project-features ul {
    list-style: none;
    padding-left: 0;
}

.project-features li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.project-features li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

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

.project-placeholder-card {
    opacity: 0.7;
}

.project-placeholder-card .project-image {
    background: linear-gradient(135deg, #cbd5e1 0%, #94a3b8 100%);
}

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

.contact {
    background: var(--bg-secondary);
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1rem 2rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.contact-link:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 1.5rem;
}

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

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

.footer p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

.footer-note {
    font-size: 0.875rem;
    opacity: 0.6;
}

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }

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

    .hamburger {
        display: flex;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .experience-grid {
        padding: 20px 0 30px 0;
    }

    .experience-card {
        min-width: 300px;
        max-width: 300px;
    }

    .experience-nav {
        display: none;
    }

    .experience-subtitle {
        font-size: 0.8125rem;
    }

    .projects-grid {
        padding: 20px 0 30px 0;
    }

    .project-card {
        min-width: 300px;
        max-width: 300px;
    }

    .project-nav {
        display: none;
    }

    .projects-subtitle {
        font-size: 0.8125rem;
    }

    .contact-links {
        flex-direction: column;
    }

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

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

    .about-image {
        max-width: 250px;
        margin: 0 auto;
    }

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

/* ============================================================================
   Animations
   ============================================================================ */

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

.hero-content,
.about-content,
.project-card {
    animation: fadeInUp 0.8s ease-out;
}

.project-card:nth-child(2) {
    animation-delay: 0.2s;
}

.project-card:nth-child(3) {
    animation-delay: 0.4s;
}