/**
 * Jean-Pierre Yin Photography Portfolio
 */

/* ===========================================
   Design Tokens
   =========================================== */
:root {
    --color-text: #1a1a1a;
    --color-text-light: #666;
    --color-bg: #fff;
    --color-border: #eee;

    --font-sans: "Space Grotesk", system-ui, sans-serif;
    --font-serif: "Libre Baskerville", Georgia, serif;
    --font-size-xs: 0.6875rem;
    --font-size-sm: 0.75rem;
    --font-size-base: 0.875rem;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    --page-padding: clamp(1.5rem, 5vw, 4rem);
    --grid-gap: clamp(1.5rem, 3vw, 3rem);
    --transition: 200ms ease;
}

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

html {
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

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

button {
    font: inherit;
    color: inherit;
    background: none;
    border: none;
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

/* ===========================================
   Header
   =========================================== */
.header {
    --header-text: var(--color-text);
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 100;
    background: transparent;
    transition: transform var(--transition);
}

.header--dark {
    --header-text: #fff;
}

.header-hidden {
    transform: translateY(-100%);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--page-padding);
    padding-block-end: var(--space-lg);
}

.logo {
    font-size: var(--font-size-base);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--header-text);
    transition: color 0.3s ease;
}

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

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--header-text);
    transition: color 0.3s ease;
}

/* ===========================================
   Home - Masonry Gallery (Matsuya style)
   =========================================== */
.home {
    min-height: 100dvh;
}

.gallery-masonry {
    column-count: 4;
    column-gap: var(--grid-gap);
    padding: var(--page-padding);
    padding-block-start: calc(var(--space-2xl) + var(--space-lg));
    max-width: 1600px;
    margin-inline: auto;
}

.gallery-item {
    display: block;
    break-inside: avoid;
    margin-block-end: var(--grid-gap);
}

.gallery-item img {
    width: 100%;
    height: auto;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.gallery-item img.loaded {
    opacity: 1;
}

/* ===========================================
   Projets Page - Grid with titles (Pazari style)
   =========================================== */
.projets {
    min-height: 100dvh;
    padding: var(--page-padding);
    padding-block-start: calc(var(--space-xl) + var(--space-lg));
}

.projets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--grid-gap);
    max-width: 1100px;
    margin-inline: auto;
}

.projet-card {
    display: block;
    position: relative;
}

.projet-card img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
}

.projet-title {
    display: block;
    margin-block-start: var(--space-sm);
    margin-block-end: var(--space-lg);
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* ===========================================
   Project Detail Page
   =========================================== */
.project-hero {
    position: relative;
    width: 100%;
    height: 100dvh;
    overflow: hidden;
}

.project-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-hero-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-xl) var(--page-padding);
    background: linear-gradient(to top, rgba(0,0,0,0.4) 0%, transparent 50%);
}

.project-hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 400;
    font-style: italic;
    letter-spacing: 0.02em;
    color: #fff;
}

.project-hero-meta {
    font-size: var(--font-size-sm);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.8);
    margin-block-start: var(--space-xs);
}

.project-gallery {
    column-count: 2;
    column-gap: var(--space-sm);
    padding: var(--space-lg) var(--page-padding) var(--space-xl);
    max-width: 1200px;
    margin-inline: auto;
}

.project-gallery figure {
    display: block;
    break-inside: avoid;
    margin-block-end: var(--space-sm);
}

.project-gallery img {
    width: 100%;
    height: auto;
}

.project-gallery::before {
    content: "";
    display: block;
    height: 8vw;
    break-inside: avoid;
    break-after: avoid;
}

.back-nav {
    padding: var(--space-lg) var(--page-padding);
    text-align: center;
}

.back-nav a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

/* ===========================================
   Contact Page
   =========================================== */
.contact {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-xl) var(--page-padding);
    max-width: 600px;
    margin-inline: auto;
}

.contact-title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-block-end: var(--space-xs);
}

.contact-intro {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-block-end: var(--space-lg);
}

.contact-form {
    margin-block-end: var(--space-xl);
}

.form-group {
    margin-block-end: var(--space-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-block-end: var(--space-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 0;
    font: inherit;
    color: var(--color-text);
    background: transparent;
    border: none;
    border-block-end: 1px solid var(--color-border);
    transition: border-color var(--transition);
}

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

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.75rem var(--space-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-bg);
    background: var(--color-text);
    transition: opacity var(--transition);
}

.btn:hover {
    opacity: 0.8;
}

.spinner {
    display: none;
    width: 0.875rem;
    height: 0.875rem;
    border: 2px solid transparent;
    border-block-start-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.htmx-request .spinner {
    display: inline-block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#form-response {
    margin-block-start: var(--space-md);
}

.form-success {
    color: #2e7d32;
    padding: var(--space-sm);
    background: #e8f5e9;
}

.form-error {
    color: #c62828;
    padding: var(--space-sm);
    background: #ffebee;
}

.contact-info {
    display: flex;
    gap: var(--space-xl);
    padding-block-start: var(--space-lg);
    border-block-start: 1px solid var(--color-border);
}

.contact-item h2 {
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
    margin-block-end: var(--space-xs);
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    padding: var(--space-lg) var(--page-padding);
    text-align: center;
    border-block-start: 1px solid var(--color-border);
}

.footer-email {
    font-size: var(--font-size-sm);
    letter-spacing: 0.1em;
    margin-block-end: var(--space-xs);
}

.footer-email a {
    border-block-end: 1px solid var(--color-text);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    letter-spacing: 0.08em;
}

/* ===========================================
   HTMX States
   =========================================== */
.htmx-request {
    opacity: 0.5;
}

/* ===========================================
   Responsive - Tablet
   =========================================== */
@media (max-width: 64rem) {
    .gallery-masonry {
        column-count: 2;
    }

    .project-gallery {
        column-gap: 0.75rem;
    }

    .project-gallery::before {
        height: 6vw;
    }

    .project-gallery figure {
        margin-block-end: 0.75rem;
    }
}

/* ===========================================
   Responsive - Mobile
   =========================================== */
@media (max-width: 48rem) {
    .gallery-masonry {
        column-count: 1;
        padding-block-start: calc(var(--space-2xl) + var(--space-md));
    }

    .gallery-item {
        margin-block-end: var(--space-lg);
    }

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

    .project-gallery {
        column-count: 1;
    }

    .project-gallery::before {
        display: none;
    }

    .nav {
        gap: var(--space-sm);
    }

    .contact-info {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* ===========================================
   Accessibility
   =========================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}