/* TTW — minimal architecture & furniture design */

:root {
    --bg: #f7f5f2;
    --bg-alt: #eeebe6;
    --surface: #ffffff;
    --text: #1a1a18;
    --text-muted: #6b6860;
    --accent: #8a7f6e;
    --line: rgba(26, 26, 24, 0.1);
    --line-strong: rgba(26, 26, 24, 0.2);

    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Inter', system-ui, sans-serif;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 7rem;

    --max-width: 72rem;
    --header-h: 4.5rem;

    --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition: 0.4s var(--ease);
}

*, *::before, *::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 300;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
}

img, video { max-width: 100%; display: block; }

a {
    color: inherit;
    text-decoration: none;
    transition: opacity var(--transition);
}

a:hover { opacity: 0.65; }

.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-sm);
    z-index: 9999;
    padding: 0.5rem 1rem;
    background: var(--text);
    color: var(--bg);
}

.skip-link:focus { top: var(--space-sm); }

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(247, 245, 242, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-mark {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    letter-spacing: 0.2em;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 1px;
    background: var(--text);
    transition: var(--transition);
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: var(--space-md);
}

.nav-link {
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    position: relative;
}

.nav-link.is-active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--text);
}

.lang-switch {
    display: flex;
    gap: 0.75rem;
    margin-left: var(--space-md);
    padding-left: var(--space-md);
    border-left: 1px solid var(--line);
}

.lang-link {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    opacity: 0.4;
}

.lang-link.is-active { opacity: 1; }

.site-nav {
    display: flex;
    align-items: center;
}

@media (max-width: 767px) {
    .nav-toggle { display: flex; }

    .site-nav {
        position: fixed;
        inset: var(--header-h) 0 0 0;
        background: var(--bg);
        padding: var(--space-md);
        flex-direction: column;
        transform: translateX(100%);
        transition: transform var(--transition);
    }

    .site-nav.is-open { transform: translateX(0); }

    .site-nav ul {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .lang-switch {
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        margin-top: var(--space-md);
        padding-top: var(--space-md);
        border-top: 1px solid var(--line);
    }
}

/* Typography */
.eyebrow {
    font-size: 0.6875rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0 0 var(--space-sm);
}

.display {
    font-family: var(--font-display);
    font-size: clamp(2.75rem, 8vw, 5.5rem);
    font-weight: 300;
    line-height: 1.05;
    margin: 0 0 var(--space-md);
    letter-spacing: -0.02em;
}

.display--sm {
    font-size: clamp(2.25rem, 6vw, 4rem);
}

.display em {
    font-style: italic;
    font-weight: 300;
}

.lead {
    font-size: 1.0625rem;
    color: var(--text-muted);
    max-width: 32rem;
    margin: 0;
}

.lead--narrow { max-width: 28rem; }

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 300;
    line-height: 1.2;
    margin: 0 0 var(--space-sm);
}

.section-title--center { text-align: center; }

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

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: flex-end;
    padding: calc(var(--header-h) + var(--space-lg)) var(--space-md) var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    overflow: hidden;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.35;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 40rem;
}

.hero-actions {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-top: var(--space-md);
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-md);
    right: var(--space-md);
    width: 1px;
    height: 48px;
    background: var(--line-strong);
}

.hero-scroll span {
    display: block;
    width: 1px;
    height: 16px;
    background: var(--text);
    animation: scroll-pulse 2s var(--ease) infinite;
}

@keyframes scroll-pulse {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(24px); opacity: 0.2; }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.btn:hover { opacity: 1; }

.btn-primary {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
}

.btn-primary:hover {
    background: transparent;
    color: var(--text);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: var(--line-strong);
}

.btn-ghost:hover {
    border-color: var(--text);
}

/* Featured / Grid layouts */
.section-grid {
    display: grid;
    gap: var(--space-md);
    align-items: center;
}

@media (min-width: 768px) {
    .section-grid {
        grid-template-columns: 1.2fr 1fr;
        gap: var(--space-lg);
    }

    .section-grid--reverse .featured-copy { order: -1; }
}

.featured-copy p:last-child {
    color: var(--text-muted);
    margin: 0;
}

/* Media placeholders */
.media-placeholder {
    position: relative;
    aspect-ratio: 4 / 5;
    background: var(--bg-alt);
    border: 1px solid var(--line);
    overflow: hidden;
}

.media-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        linear-gradient(135deg, transparent 48%, var(--line) 49%, var(--line) 51%, transparent 52%),
        linear-gradient(45deg, transparent 48%, var(--line) 49%, var(--line) 51%, transparent 52%);
    opacity: 0.5;
}

.media-placeholder::after {
    content: attr(data-label);
    position: absolute;
    bottom: var(--space-sm);
    left: var(--space-sm);
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.media-placeholder--hero { aspect-ratio: 16 / 10; }
.media-placeholder--wide { aspect-ratio: 21 / 9; }
.media-placeholder--video { aspect-ratio: 16 / 9; }

.media-slot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

/* Pillars */
.pillars-grid {
    display: grid;
    gap: var(--space-md);
    border-top: 1px solid var(--line);
    padding-top: var(--space-lg);
}

@media (min-width: 768px) {
    .pillars-grid { grid-template-columns: repeat(3, 1fr); }
}

.pillar h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    margin: 0 0 var(--space-xs);
}

.pillar p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.875rem;
}

/* Page hero */
.page-hero {
    padding-top: calc(var(--header-h) + var(--space-xl));
    padding-bottom: var(--space-md);
}

/* Studio */
.split-layout {
    display: grid;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .split-layout { grid-template-columns: 1fr 2fr; }
}

.philosophy-text {
    font-size: 1.0625rem;
    color: var(--text-muted);
    margin: 0 0 var(--space-md);
}

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

.process-grid {
    list-style: none;
    margin: var(--space-lg) 0 0;
    padding: 0;
    display: grid;
    gap: var(--space-md);
}

@media (min-width: 640px) {
    .process-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
    .process-grid { grid-template-columns: repeat(4, 1fr); }
}

.process-step {
    padding: var(--space-md);
    border: 1px solid var(--line);
    background: var(--surface);
}

.process-num {
    display: block;
    font-size: 0.6875rem;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: var(--space-sm);
}

.process-step h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 400;
    margin: 0 0 var(--space-xs);
}

.process-step p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
}

/* Work */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--line);
}

.filter-btn {
    background: none;
    border: 1px solid var(--line);
    padding: 0.5rem 1rem;
    font-family: var(--font-body);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    color: var(--text-muted);
    transition: all var(--transition);
}

.filter-btn.is-active,
.filter-btn:hover {
    color: var(--text);
    border-color: var(--text);
}

.project-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 640px) {
    .project-grid { grid-template-columns: repeat(2, 1fr); }
}

.project-card {
    opacity: 1;
    transition: opacity var(--transition);
}

.project-card.is-hidden {
    display: none;
}

.project-link { display: block; }

.project-media {
    position: relative;
    margin-bottom: var(--space-sm);
}

.project-year {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    background: var(--surface);
    padding: 0.25rem 0.5rem;
    z-index: 2;
}

.project-cat {
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    margin: 0.25rem 0;
}

.project-info p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

/* Contact */
.contact-grid {
    display: grid;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .contact-grid { grid-template-columns: 1fr 1.2fr; }
}

.contact-list {
    list-style: none;
    margin: var(--space-md) 0;
    padding: 0;
}

.contact-list li {
    margin-bottom: var(--space-sm);
}

.contact-label {
    display: block;
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.15rem;
}

.contact-social {
    display: flex;
    gap: var(--space-md);
    font-size: 0.8125rem;
}

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

.form-row label {
    display: block;
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.35rem;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 300;
    border: 1px solid var(--line-strong);
    background: var(--surface);
    color: var(--text);
    transition: border-color var(--transition);
}

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

.form-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--line);
    padding: var(--space-lg) var(--space-md);
    margin-top: var(--space-lg);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    gap: var(--space-md);
}

@media (min-width: 768px) {
    .footer-inner {
        grid-template-columns: 1.5fr 1fr 1fr;
        align-items: start;
    }

    .footer-copy { grid-column: 1 / -1; }
}

.footer-brand p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: var(--space-xs) 0 0;
}

.footer-links,
.footer-social {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.8125rem;
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: var(--space-md) 0 0;
    padding-top: var(--space-md);
    border-top: 1px solid var(--line);
}

/* Back to top */
.back-top {
    position: fixed;
    bottom: var(--space-md);
    right: var(--space-md);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--text);
    color: var(--bg);
    font-size: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
    z-index: 50;
}

.back-top.is-visible {
    opacity: 1;
    pointer-events: auto;
}

/* Reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

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

    html { scroll-behavior: auto; }
}