/* ==========================================================================
   ARTSMODJO — main.css
   Design tokens, base typography, layout primitives and shared components.
   Structure:
     1. Tokens
     2. Base
     3. Layout
     4. Typography utilities
     5. Header / navigation
     6. Footer
     7. Components (buttons, media, meta rows, forms)
     8. Motion
   ========================================================================== */


/* 1. Tokens
   ========================================================================== */

:root {
  /* Color — dark theme (primary)
     --bg/--surface       : page background layers (near-black family)
     --text/--muted       : body copy on dark
     --invert/--invert-*  : light palette, used by inverted sections
                            (statement, footer) that contrast the dark page. */
  --bg: #101010;
  --surface: #161616;
  --surface-2: #1d1d1d;
  --text: #f4f4ef;
  --muted: #a3a39b;
  --line: rgba(244, 244, 239, 0.16);
  --invert: #f3f3ef;
  --invert-text: #101010;
  --invert-muted: #777770;
  --invert-line: rgba(16, 16, 16, 0.15);

  color-scheme: dark;

  /* Type */
  --font-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --size-hero: clamp(4.5rem, 10.5vw, 8.5rem);
  --size-title: clamp(3rem, 7vw, 6rem);
  --size-h2: clamp(2.5rem, 5vw, 4.5rem);
  --size-h3: clamp(1.5rem, 3vw, 2.5rem);
  --size-lead: clamp(1.25rem, 2.2vw, 1.75rem);
  --size-body: 1rem;
  --size-meta: 0.75rem;

  /* Space */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  --space-section: clamp(5rem, 10vw, 9rem);

  /* Layout */
  --container: 1500px;
  --gutter: clamp(1.25rem, 3.3vw, 4rem);
  --header-h: 76px;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 300ms;
  --dur-med: 500ms;
  --dur-slow: 700ms;
}


/* 2. Base
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--size-body);
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

::selection {
  background: var(--text);
  color: var(--bg);
}

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 4px;
}

.on-dark :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--invert-text);
}

h1, h2, h3, h4 {
  line-height: 1;
  font-weight: 500;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}


/* 3. Layout
   ========================================================================== */

.container {
  width: min(100%, var(--container));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--space-section);
}

.section-rule {
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-md);
  align-items: baseline;
  margin-block-end: var(--space-lg);
}

.section-head .meta {
  justify-self: end;
}

/* Two-column editorial intro: label left, copy right */
.split-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: var(--space-lg);
  align-items: start;
}


/* Home hero — editorial split with architectural brand structure */
.hero {
  padding-block: calc(var(--header-h) + var(--space-xl)) var(--space-lg);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: end;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  margin-block-start: var(--space-lg);
  flex-wrap: wrap;
}

/* Oversized, low-contrast brand mark as architectural element.
   Opacity keeps it structural, not decorative. */
.hero-structure img {
  width: 100%;
  height: auto;
  opacity: 0.14;
}

@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-structure {
    max-width: 420px;
  }
}

/* Sub-page hero — clears fixed header, sets editorial rhythm */
.page-hero {
  padding-block: calc(var(--header-h) + var(--space-xl)) var(--space-lg);
}

.page-hero .lead {
  margin-block-start: var(--space-md);
}

/* 4. Typography utilities
   ========================================================================== */

.display-hero {
  font-size: var(--size-hero);
  font-weight: 600;
  line-height: 0.94;
  letter-spacing: -0.05em;
}

.display-title {
  font-size: var(--size-title);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.display-h2 {
  font-size: var(--size-h2);
}

.display-h3 {
  font-size: var(--size-h3);
}

.lead {
  font-size: var(--size-lead);
  line-height: 1.4;
  color: var(--text);
  max-width: 42ch;
}

.meta {
  font-family: var(--font-sans);
  font-size: var(--size-meta);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.4;
  color: var(--muted);
}

.muted {
  color: var(--muted);
}

.wide-gap {
  letter-spacing: 0.28em;
}

.index-num {
  font-size: var(--size-meta);
  color: var(--muted);
  letter-spacing: 0.1em;
}


/* 5. Header / navigation
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  transition: background var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(16, 16, 16, 0.94);
  -webkit-backdrop-filter: saturate(1.2);
  backdrop-filter: saturate(1.2);
  border-bottom-color: var(--line);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.wordmark__mark {
  height: 26px;
  width: auto;
}

/* Mobile overlay: white mark variant on light bg would vanish —
   overlay bg stays light, so use dark there; white version reserved
   for dark surfaces (footer/statement). */
.mobile-nav__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.mobile-nav__mark {
  height: 40px;
  width: auto;
}

/* Skip link — visible on first tab */
.skip-link {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 200;
  padding: 0.75rem 1.25rem;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.primary-nav ul {
  display: flex;
  gap: clamp(1.25rem, 2.5vw, 2.75rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-nav a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 450;
  padding-block: 0.5rem;
}

.primary-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease);
}

.primary-nav a:hover::after,
.primary-nav a[aria-current='page']::after {
  transform: scaleX(1);
}

.primary-nav a[aria-current='page'] {
  font-weight: 550;
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Fullscreen mobile overlay */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: 99;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-block: var(--space-md) var(--space-lg);
  background: var(--bg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-fast) var(--ease),
              visibility var(--dur-fast) var(--ease);
}

.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav li {
  border-bottom: 1px solid var(--line);
}

.mobile-nav a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-block: 1.1rem;
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 500;
  letter-spacing: -0.03em;
}

.mobile-nav a[aria-current='page'] {
  text-decoration: underline;
  text-underline-offset: 0.4em;
}

.mobile-nav .meta {
  padding-block-start: var(--space-lg);
}

body.nav-open {
  overflow: hidden;
}

.no-js .mobile-nav {
  display: none;
}


/* 6. Footer
   ========================================================================== */

.site-footer {
  background: var(--invert);
  color: var(--invert-text);
  padding-block: var(--space-xl) var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.7fr) minmax(0, 0.7fr);
  gap: var(--space-lg);
  padding-block-end: var(--space-lg);
}

.footer-lockup {
  height: clamp(80px, 14vw, 160px);
  width: auto;
}

.footer-col h2 {
  font-size: var(--size-meta);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--invert-muted);
  margin-block-end: var(--space-sm);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.footer-col a:hover {
  text-decoration: underline;
  text-underline-offset: 0.35em;
}

.footer-base {
  border-top: 1px solid var(--invert-line);
  padding-block-start: var(--space-sm);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-xs);
  font-size: var(--size-meta);
  color: var(--invert-muted);
}


/* 7. Components
   ========================================================================== */

/* Arrow link — primary inline action */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
  padding-block-end: 0.35rem;
  border-bottom: 1px solid currentColor;
}

.arrow-link .arrow {
  transition: transform var(--dur-fast) var(--ease);
}

.arrow-link:hover .arrow {
  transform: translate(4px, -4px);
}

/* Solid button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 48px;
  padding: 0.9rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 500;
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
  transition: background var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease);
}

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

.btn--invert {
  background: transparent;
  color: var(--invert-text);
  border-color: var(--invert-text);
}

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

/* Media frame — real production screenshots, desaturated until hover */
.media {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
}

.media--16-9 { aspect-ratio: 16 / 9; }
.media--16-10 { aspect-ratio: 16 / 10; }
.media--4-3 { aspect-ratio: 4 / 3; }
.media--3-2 { aspect-ratio: 3 / 2; }
.media--1-1 { aspect-ratio: 1 / 1; }
.media--21-9 { aspect-ratio: 21 / 9; }

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

/* Interactive media inside links: subtle scale on hover */
.media-link {
  display: block;
}

.media-link .media img {
  transition: transform 600ms var(--ease);
}

.media-link:hover .media img,
.media-link:focus-visible .media img {
  transform: scale(1.02);
}

/* Meta row — numbered editorial project listing */
.meta-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  gap: var(--space-sm);
  align-items: baseline;
  padding-block: var(--space-sm);
  border-top: 1px solid var(--line);
}

.meta-row__num {
  color: var(--muted);
  font-size: var(--size-meta);
  letter-spacing: 0.1em;
}

.meta-row__cat {
  justify-self: end;
}

/* Project feature (home) & project hero (detail) */
.project-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: end;
}

.project-feature__info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-lg);
  border-top: 1px solid var(--line);
  padding-block-start: var(--space-sm);
  min-height: 280px;
}

.project-feature__info .display-h2 {
  max-width: 12ch;
}

.project-feature__desc {
  color: var(--muted);
  max-width: 34ch;
}

/* Selected work grid — editorial, not cards */
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: var(--space-lg);
}

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

.work-item__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-block-end: 0.75rem;
}

.work-item h3 {
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
}

/* Capabilities list — structured rows, no icon cards */
.capability-row {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr) minmax(0, 1.5fr);
  gap: var(--space-md);
  padding-block: var(--space-md);
  border-top: 1px solid var(--line);
}

.capability-row:last-of-type {
  border-bottom: 1px solid var(--line);
}

.capability-row h3 {
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
}

.capability-row ul {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: var(--space-md);
  color: var(--muted);
  align-self: center;
}

.capability-row li {
  break-inside: avoid;
  margin-block-end: 0.35rem;
  line-height: 1.5;
}

/* Statement — inverted typographic section (light band on dark page) */
.statement {
  background: var(--invert);
  color: var(--invert-text);
  padding-block: clamp(7rem, 14vw, 12rem);
}

.statement p {
  font-size: clamp(2.5rem, 6.5vw, 6rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.045em;
  max-width: 16ch;
}

/* Lab grid — asymmetric, more exploratory */
.lab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: var(--space-lg);
  align-items: start;
}

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

.lab-item figcaption {
  display: flex;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-block-start: 0.75rem;
}

/* Process list (about) */
.process-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.process-list li {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr) minmax(0, 1.5fr);
  gap: var(--space-md);
  align-items: baseline;
  padding-block: var(--space-md);
  border-top: 1px solid var(--line);
}

.process-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.process-list li::before {
  counter-increment: step;
  content: '0' counter(step);
  font-size: var(--size-meta);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.process-list strong {
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 500;
}

.process-list p {
  color: var(--muted);
}

/* Principles grid (about) */
.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
}

.principle {
  border-top: 1px solid var(--line);
  padding-block-start: var(--space-sm);
}

.principle h3 {
  font-size: 1.25rem;
  margin-block-end: var(--space-sm);
}

.principle p {
  color: var(--muted);
}

/* Forms (contact) */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(var(--space-lg), 8vw, var(--space-xl));
  align-items: start;
}

.field {
  display: grid;
  gap: 0.4rem;
  margin-block-end: var(--space-md);
}

.field label {
  font-size: var(--size-meta);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.7rem 0.9rem;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 0;
  transition: border-color var(--dur-fast) var(--ease);
}

.field select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 49%, var(--muted) 50%),
                    linear-gradient(-45deg, transparent 49%, var(--muted) 50%);
  background-size: 7px 7px, 7px 7px;
  background-position: right 1.2rem center, right 1.6rem center;
  background-repeat: no-repeat;
}

.field textarea {
  min-height: 160px;
  resize: vertical;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--text);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-md);
}

/* Server-side validation feedback */
.field-error {
  font-size: 0.85rem;
  color: var(--text);
}

.field input[aria-invalid='true'],
.field select[aria-invalid='true'],
.field textarea[aria-invalid='true'] {
  border-color: var(--text);
}

.form-notice {
  grid-column: 1 / -1;
  padding: var(--space-sm);
  border: 1px solid var(--line);
  margin-block-end: var(--space-md);
}

/* Honeypot — present in DOM, invisible to users and AT */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}


/* 8. Motion — reveal on scroll
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-med) var(--ease),
              transform var(--dur-med) var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Page-load transition */
.page-transition {
  animation: page-in 500ms var(--ease) both;
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-transition {
    animation: none;
  }

  .media-link .media img,
  .arrow-link .arrow,
  .primary-nav a::after {
    transition: none;
  }
}

/* Real-project covers — neutral editorial card, not a fake screenshot.
   Preserves black/off-white identity until verified screenshots ship.
   Photographic covers (when added) render desaturated, color on hover. */
.media--cover {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-md);
  min-height: 100%;
  background: var(--surface);
}

.media--cover .media--cover__title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
}

.media--cover .media--cover__meta {
  color: var(--muted);
  font-size: var(--size-meta);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.media img.media--photo {
  filter: grayscale(1);
}

.media-link:hover .media img.media--photo,
.media-link:focus-visible .media img.media--photo {
  filter: none;
}