/* ═══════════════════════════════════════════════════════════════
   AI ENGINEER PORTFOLIO — Clean, Green-Accented Design
   ═══════════════════════════════════════════════════════════════ */

:root {
    /* Base tones */
    --color-cream: #F9F8F5;
    --color-white: #FFFFFF;
    --color-stone: #E8E5DF;
    
    /* Text */
    --color-ink: #1A1A1A;
    --color-graphite: #4A4744;
    --color-mist: #7D7A75;
    
    /* Greens — the star of the show */
    --color-forest: #2D5A47;
    --color-sage: #7A9E8E;
    --color-mint: #A8D5C2;
    --color-olive: #6B7F59;
    --color-moss: #4A6741;
    
    /* Supporting accents */
    --color-ochre: #C9A86C;
    --color-terracotta: #C4846C;
    
    /* Typography */
    --font-serif: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Outfit', system-ui, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;
    
    /* Timing */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --duration: 300ms;
    
    /* Layout */
    --max-width: 1100px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-ink);
    background-color: var(--color-cream);
    -webkit-font-smoothing: antialiased;
}

::selection {
    background-color: var(--color-mint);
    color: var(--color-ink);
}

/* Typography */
h1, h2, h3 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
}

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

/* Layout */
.section-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-forest);
    margin-bottom: var(--space-sm);
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    color: var(--color-ink);
}

/* ─────────────────────────────────────────────────────────────────
   Navigation
   ───────────────────────────────────────────────────────────────── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) 0;
    background: rgba(249, 248, 245, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-forest);
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--color-graphite);
    transition: color var(--duration) var(--ease);
}

.nav-links a:hover {
    color: var(--color-forest);
}

/* ─────────────────────────────────────────────────────────────────
   Intro Section
   ───────────────────────────────────────────────────────────────── */
.intro {
    min-height: 80vh;
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-xl) var(--space-lg) var(--space-lg);
    gap: var(--space-xl);
}

.intro-content {
    flex: 1;
    max-width: 550px;
}

.intro-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-white);
    background: var(--color-forest);
    padding: 0.4em 1em;
    border-radius: 20px;
    margin-bottom: var(--space-md);
}

.intro-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 300;
    margin-bottom: var(--space-md);
    max-width: 700px;
    display: flex;
    align-items: baseline;
}

.typing-text {
    display: inline;
    overflow: hidden;
    white-space: nowrap;
    border-right: 3px solid var(--color-forest);
    animation: typing 1.2s steps(12) 0.5s forwards, cursor-blink 0.8s step-end infinite;
    max-width: 0;
}

@keyframes typing {
    from { max-width: 0; }
    to { max-width: 500px; }
}

@keyframes cursor-blink {
    0%, 50% { border-color: var(--color-forest); }
    51%, 100% { border-color: transparent; }
}

.title-accent {
    color: var(--color-sage);
}

.intro-description {
    font-size: 1.125rem;
    color: var(--color-graphite);
    max-width: 500px;
    margin-bottom: var(--space-md);
}

.intro-details {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-mist);
    font-size: 0.9rem;
}

.detail-dot {
    color: var(--color-sage);
}

.resume-link {
    color: var(--color-forest);
    font-weight: 400;
    transition: color var(--duration) var(--ease);
}

.resume-link:hover {
    color: var(--color-sage);
}

/* Portrait */
.intro-portrait {
    flex-shrink: 0;
    width: 350px;
}

.portrait-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(45, 90, 71, 0.15);
}

/* ─────────────────────────────────────────────────────────────────
   Experience Section
   ───────────────────────────────────────────────────────────────── */
.experience {
    padding: var(--space-2xl) 0;
    background: var(--color-white);
}

.experience .section-header {
    margin-bottom: var(--space-xl);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.experience-card {
    background: var(--color-cream);
    border-radius: 12px;
    padding: var(--space-md);
    transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.experience-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(45, 90, 71, 0.1);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-sm);
}

.experience-title {
    font-size: 1.125rem;
    font-family: var(--font-serif);
    margin-bottom: 0.25rem;
}

.experience-company {
    font-size: 0.9rem;
    color: var(--color-forest);
    font-weight: 400;
}

.experience-location {
    font-size: 0.8rem;
    color: var(--color-mist);
}

.experience-date {
    font-size: 0.75rem;
    color: var(--color-mist);
    white-space: nowrap;
}

.experience-description {
    font-size: 0.9rem;
    color: var(--color-graphite);
    line-height: 1.5;
    margin-bottom: var(--space-sm);
}

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

.card-link {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-forest);
    display: inline-flex;
    align-items: center;
    gap: 0.25em;
    transition: gap var(--duration) var(--ease);
}

.card-link:hover {
    gap: 0.5em;
}

/* ─────────────────────────────────────────────────────────────────
   Projects Section
   ───────────────────────────────────────────────────────────────── */
.projects {
    padding: var(--space-xl) 0;
    background: var(--color-cream);
}

.projects .section-header {
    margin-bottom: var(--space-xl);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.project-card {
    background: var(--color-cream);
    border-radius: 12px;
    overflow: hidden;
    transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(45, 90, 71, 0.1);
}

.project-image {
    aspect-ratio: 16/10;
    overflow: hidden;
    background-color: #f5f4f1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px 12px 0 0;
}

.project-cover {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform var(--duration) var(--ease);
}

.project-card:hover .project-cover {
    transform: scale(1.02);
}

.project-image-circle {
    background: transparent;
    border: none;
}

.project-image-circle .project-cover {
    box-shadow: none;
    border-radius: 0;
    max-width: 70%;
    max-height: 90%;
}

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

.project-meta {
    margin-bottom: var(--space-xs);
}

.project-date {
    font-size: 0.75rem;
    color: var(--color-mist);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.tag {
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.3em 0.7em;
    border-radius: 12px;
}

.tag-green {
    background: rgba(45, 90, 71, 0.1);
    color: var(--color-forest);
}

.tag-sage {
    background: rgba(122, 158, 142, 0.2);
    color: var(--color-moss);
}

.tag-ochre {
    background: rgba(201, 168, 108, 0.2);
    color: #8a7340;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
    transition: color var(--duration) var(--ease);
}

.project-card:hover .project-title {
    color: var(--color-forest);
}

.project-description {
    font-size: 0.9rem;
    color: var(--color-graphite);
    margin-bottom: var(--space-sm);
    line-height: 1.5;
}

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

.project-link {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-forest);
    display: inline-flex;
    align-items: center;
    gap: 0.25em;
    transition: gap var(--duration) var(--ease);
}

.project-link:hover {
    gap: 0.5em;
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-graphite);
    transition: color var(--duration) var(--ease);
}

.github-link:hover {
    color: var(--color-forest);
}

.github-link svg {
    flex-shrink: 0;
    transition: transform var(--duration) var(--ease);
}

.github-link:hover svg {
    transform: scale(1.1);
}

/* ─────────────────────────────────────────────────────────────────
   Contact Section
   ───────────────────────────────────────────────────────────────── */
.contact {
    padding: var(--space-xl) 0;
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-cream) 100%);
}

.contact-content {
    max-width: 500px;
}

.contact-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    margin-bottom: var(--space-sm);
}

.contact-description {
    color: var(--color-graphite);
    margin-bottom: var(--space-lg);
}

.contact-email {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-serif);
    font-size: 1.375rem;
    color: var(--color-white);
    background: var(--color-forest);
    padding: var(--space-sm) var(--space-md);
    border-radius: 8px;
    transition: all var(--duration) var(--ease);
}

.contact-email:hover {
    background: var(--color-moss);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(45, 90, 71, 0.25);
}

.email-arrow {
    transition: transform var(--duration) var(--ease);
}

.contact-email:hover .email-arrow {
    transform: translateX(4px);
}

.contact-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-stone);
}

.social-link {
    font-size: 0.9rem;
    color: var(--color-graphite);
    transition: color var(--duration) var(--ease);
}

.social-link:hover {
    color: var(--color-forest);
}

/* ─────────────────────────────────────────────────────────────────
   Footer
   ───────────────────────────────────────────────────────────────── */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-stone);
}

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

/* ─────────────────────────────────────────────────────────────────
   Responsive
   ───────────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .intro {
        flex-direction: column-reverse;
        text-align: center;
        min-height: auto;
        padding-top: 120px;
        padding-bottom: var(--space-xl);
        gap: var(--space-lg);
    }
    
    .intro-portrait {
        width: 250px;
    }
    
    .intro-content {
        display: flex;
        flex-direction: column;
        align-items: center;
        max-width: 100%;
    }
    
    .intro-description {
        text-align: center;
    }
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .projects-grid,
    .experience-grid {
        grid-template-columns: 1fr;
    }
    
    .intro-portrait {
        width: 220px;
    }
    
    .experience-header {
        flex-direction: column;
        gap: var(--space-xs);
    }
}

@media (max-width: 480px) {
    .nav-inner {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .intro-details {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .detail-dot {
        display: none;
    }
    
    .contact-email {
        font-size: 1.125rem;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}