/*
 * Nash F V — Personal Site
 * Design Philosophy: Dieter Rams / Jony Ive
 * Less, but better.
 */

:root {
    --black: #1D1D1F;
    --gray-dark: #424245;
    --gray-mid: #86868B;
    --gray-light: #D2D2D7;
    --gray-pale: #F5F5F7;
    --white: #FFFFFF;
    --accent: #E85D04;
    
    --space-unit: 8px;
    --space-1: calc(var(--space-unit) * 1);
    --space-2: calc(var(--space-unit) * 2);
    --space-3: calc(var(--space-unit) * 3);
    --space-4: calc(var(--space-unit) * 4);
    --space-6: calc(var(--space-unit) * 6);
    --space-8: calc(var(--space-unit) * 8);
    --space-12: calc(var(--space-unit) * 12);
    --space-16: calc(var(--space-unit) * 16);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.65;
    color: var(--black);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

/* ==================== HEADER ==================== */

header {
    padding: var(--space-3) 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

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

.logo {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--black);
    text-decoration: none;
}

.logo .accent {
    color: var(--accent);
}

nav {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

nav a {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-dark);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Dropdown for Projects */
.nav-item {
    position: relative;
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown {
    position: absolute;
    top: 100%;
    left: -var(--space-2);
    padding-top: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
}

.dropdown-inner {
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: 8px;
    padding: var(--space-1) 0;
    min-width: 160px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.dropdown a {
    display: block;
    padding: var(--space-1) var(--space-3);
    font-size: 14px;
    color: var(--gray-dark);
}

.dropdown a:hover {
    background: var(--gray-pale);
    color: var(--accent);
}

/* ==================== MAIN CONTENT ==================== */

main {
    padding-top: var(--space-12);
}

/* ==================== HERO ==================== */

.hero {
    padding: var(--space-16) 0 var(--space-12);
}

.hero h1 {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: var(--black);
    max-width: 720px;
}

.hero h1 .muted {
    color: var(--gray-mid);
}

.lead {
    font-size: 18px;
    color: var(--gray-dark);
    max-width: 540px;
    margin-top: var(--space-3);
    line-height: 1.6;
}

/* ==================== SECTIONS ==================== */

.section-label {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-mid);
    margin-bottom: var(--space-4);
}

.featured {
    padding: var(--space-8) 0;
    border-top: 1px solid var(--gray-light);
}

/* ==================== PROJECT GRID ==================== */

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.project-card {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card .project-image {
    aspect-ratio: 16 / 10;
    background: var(--gray-pale);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-mid);
    font-size: 14px;
    transition: all 0.3s ease;
    overflow: hidden;
}

.project-card:hover .project-image {
    background: var(--gray-light);
}

.project-card .project-info {
    padding-top: var(--space-2);
}

.project-card h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--black);
    margin-bottom: var(--space-1);
}

.project-card .project-count {
    font-size: 14px;
    color: var(--gray-mid);
}

/* ==================== PROJECT LIST (for category pages) ==================== */

.project-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.project-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    align-items: start;
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--gray-light);
}

.project-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.project-item .project-image {
    aspect-ratio: 4 / 3;
    background: var(--gray-pale);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-mid);
    font-size: 14px;
    overflow: hidden;
}

.project-item .project-info {
    padding-top: var(--space-1);
}

.project-item .project-title {
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-1);
    color: var(--black);
}

.project-item .project-meta {
    font-size: 14px;
    color: var(--gray-mid);
    margin-bottom: var(--space-3);
}

.project-item .project-description {
    font-size: 16px;
    color: var(--gray-dark);
    line-height: 1.6;
    max-width: 440px;
}

/* ==================== PHOTO GALLERY ==================== */

.photo-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2);
}

.photo-item {
    aspect-ratio: 1;
    background: var(--gray-pale);
    border-radius: 2px;
    overflow: hidden;
    cursor: pointer;
    transition: opacity 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-mid);
    font-size: 12px;
}

.photo-item:hover {
    opacity: 0.85;
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Wide photos span 2 columns */
.photo-item.wide {
    grid-column: span 2;
    aspect-ratio: 2 / 1;
}

/* ==================== ABOUT ==================== */

.about-section {
    padding: var(--space-12) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
}

.about-text {
    max-width: 480px;
}

.about-text p {
    color: var(--gray-dark);
    margin-bottom: var(--space-3);
}

.about-text p:last-child {
    margin-bottom: 0;
}

.info-block {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--gray-light);
    font-size: 15px;
}

.info-label {
    color: var(--gray-mid);
}

.info-value {
    color: var(--black);
    text-align: right;
}

/* ==================== CONTACT ==================== */

.contact-section {
    padding: var(--space-12) 0;
}

.contact-content {
    max-width: 540px;
}

.contact-content p {
    font-size: 17px;
    color: var(--gray-dark);
    margin-bottom: var(--space-4);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 16px;
    font-weight: 500;
    color: var(--black);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.contact-link .icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-link .icon svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* ==================== FOOTER ==================== */

footer {
    padding: var(--space-4) 0;
    border-top: 1px solid var(--gray-light);
    margin-top: var(--space-8);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--gray-mid);
}

.footer-links {
    display: flex;
    gap: var(--space-3);
}

.footer-links a {
    color: var(--gray-mid);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ==================== UTILITIES ==================== */

::selection {
    background: var(--accent);
    color: var(--white);
}

/* ==================== PAGE HEADER (for inner pages) ==================== */

.page-header {
    padding: var(--space-12) 0 var(--space-6);
}

.page-header h1 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--black);
}

.page-header .breadcrumb {
    font-size: 14px;
    color: var(--gray-mid);
    margin-bottom: var(--space-2);
}

.page-header .breadcrumb a {
    color: var(--gray-mid);
    text-decoration: none;
}

.page-header .breadcrumb a:hover {
    color: var(--accent);
}

/* ==================== ANIMATIONS ==================== */

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero h1,
.hero .lead {
    animation: fadeIn 0.6s ease-out both;
}

.hero .lead {
    animation-delay: 0.1s;
}

.project-card,
.project-item,
.photo-item {
    animation: fadeIn 0.5s ease-out both;
}

.project-card:nth-child(1),
.project-item:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2),
.project-item:nth-child(2) { animation-delay: 0.15s; }
.project-card:nth-child(3),
.project-item:nth-child(3) { animation-delay: 0.2s; }
.project-card:nth-child(4),
.project-item:nth-child(4) { animation-delay: 0.25s; }

/* ==================== RESPONSIVE ==================== */

@media (max-width: 768px) {
    .hero {
        padding: var(--space-8) 0 var(--space-6);
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .project-item {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .photo-gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    .photo-item.wide {
        grid-column: span 2;
    }

    .footer-inner {
        flex-direction: column;
        gap: var(--space-2);
    }

    nav {
        gap: var(--space-3);
    }
}

@media (max-width: 480px) {
    .photo-gallery {
        grid-template-columns: 1fr;
    }

    .photo-item.wide {
        grid-column: span 1;
        aspect-ratio: 16 / 9;
    }
}