/* ==========================================================================
   Tegnestuen Kontur — V3 "Arbejdstegningen"
   Se DESIGN-MANUAL.md for fulde specifikationer/kontrakt.
   ========================================================================== */

:root {
  /* Palette — §1 DESIGN-MANUAL.md */
  --paper: #F3EEE1;
  --paper-deep: #E9E1CB;
  --graphite: #211E1A;
  --graphite-soft: #5B564C;
  --label: #5F5748;
  --accent: #CE4E0E;
  --accent-dark: #A83D0A;
  --accent-on-dark: #F0975A;
  --ink-dark: #1C1915;
  --blueprint-dark: #16232D;
  --blueprint-line: #BFD8E8;
  --focus: var(--accent-dark);

  /* Typography — §2 */
  --font-display: "Avenir Next", "Century Gothic", Futura, Optima, "Segoe UI", system-ui, sans-serif;
  --font-body: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Noto Sans", Verdana, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, "Roboto Mono", "Liberation Mono", monospace;

  --size-hero: clamp(2.75rem, 6.5vw, 5.75rem);
  --size-statement: clamp(1.75rem, 3.2vw, 2.75rem);
  --size-h2: clamp(2rem, 4.2vw, 3.25rem);
  --size-h3: clamp(1.375rem, 2.4vw, 1.875rem);
  --size-body: 1.0625rem;
  --size-label: 0.8125rem;

  /* Spacing/grid — §6 */
  --container-pad: clamp(1.25rem, 4.5vw, 4.5rem);
  --content-max: 1440px;
  --header-h: 4.5rem;
  --section-pad: clamp(4rem, 9vw, 8rem);

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- Reset / base ---------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: var(--size-body);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
svg { display: block; }
h1, h2, h3, p, ul, ol, dl, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }

.container {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}
.principle :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--accent-on-dark);
}

/* Eyebrow / mono labels ---------------------------------------------- */
.mono {
  font-family: var(--font-mono);
  font-size: var(--size-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.eyebrow {
  color: var(--label);
  margin-bottom: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 1.4em;
  height: 1px;
  background: currentColor;
  display: inline-block;
}

/* ---------- Skip link ---------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  background: var(--graphite);
  color: var(--paper);
  padding: 0.85rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  transition: top 0.2s var(--ease);
}
.skip-link:focus {
  top: 1rem;
}

/* ---------- Icon sprite ---------------------------------------------- */
.icon {
  width: 1.4em;
  height: 1.4em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: square;
  stroke-linejoin: miter;
  flex-shrink: 0;
}
.icon--round { stroke-linecap: round; }

/* ---------- Buttons ---------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.95rem 1.6rem;
  border: 1px solid var(--graphite);
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.btn .icon { width: 1.1em; height: 1.1em; }
.btn-primary {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: var(--paper);
}
.btn-primary:hover { background: var(--graphite); border-color: var(--graphite); }
.btn-text {
  border-color: transparent;
  padding-left: 0;
  padding-right: 0;
  color: var(--accent-dark);
}
.btn-text:hover { color: var(--graphite); }
.btn-text .icon { transition: transform 0.25s var(--ease); }
.btn-text:hover .icon { transform: translateX(3px); }
.btn:active { transform: translateY(1px); }

.principle .btn-text,
.site-footer .btn-text { color: var(--accent-on-dark); }
.principle .btn-text:hover,
.site-footer .btn-text:hover { color: var(--paper); }

/* ---------- Dimension rule (signature device) ------------------------ */
.dim-rule {
  position: relative;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.dim-rule::before,
.dim-rule::after {
  content: "";
  position: absolute;
  top: 50%;
  height: 1px;
  background: var(--graphite-soft);
}
.dim-rule::before { left: var(--container-pad); right: 50%; margin-right: 6.5rem; }
.dim-rule::after { right: var(--container-pad); left: 50%; margin-left: 6.5rem; }
.dim-rule__tick {
  position: absolute;
  top: 50%;
  width: 1px;
  height: 10px;
  transform: translateY(-50%);
  background: var(--graphite-soft);
}
.dim-rule__tick--l { left: var(--container-pad); }
.dim-rule__tick--r { right: var(--container-pad); }
.dim-rule__label {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--label);
  white-space: nowrap;
  padding: 0 0.25rem;
}
.dim-rule--on-dark::before,
.dim-rule--on-dark::after,
.dim-rule--on-dark .dim-rule__tick { background: rgba(191, 216, 232, 0.45); }
.dim-rule--on-dark .dim-rule__label { color: var(--blueprint-line); }

/* ---------- Header ---------------------------------------------- */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(243, 238, 225, 0);
  border-bottom: 1px solid rgba(33, 30, 26, 0);
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.site-header.is-scrolled {
  background: rgba(243, 238, 225, 0.94);
  backdrop-filter: blur(6px);
  border-bottom-color: rgba(33, 30, 26, 0.12);
}
.header-inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--graphite);
}
.logo-mark { width: 2.15rem; height: 2.15rem; color: var(--accent-dark); stroke-width: 1.6; }
.logo-word {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.12em;
  font-weight: 600;
}

.primary-nav { display: none; }
.primary-nav ul { display: flex; align-items: center; gap: 2.1rem; }
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-block: 0.4rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-link:hover { border-color: var(--accent-dark); color: var(--accent-dark); }
.nav-link--cta {
  color: var(--paper);
  background: var(--graphite);
  padding: 0.55rem 1.1rem;
  border-bottom: none;
}
.nav-link--cta:hover { background: var(--accent-dark); color: var(--paper); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  color: var(--graphite);
}
.nav-toggle .icon { width: 1.5rem; height: 1.5rem; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--paper);
  border-bottom: 1px solid rgba(33, 30, 26, 0.14);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s var(--ease);
}
.mobile-nav.is-open { max-height: 24rem; }
.mobile-nav ul { padding: 1.5rem var(--container-pad) 2rem; display: flex; flex-direction: column; gap: 1.4rem; }
.mobile-nav .nav-link { font-size: 0.95rem; display: inline-block; }

@media (min-width: 900px) {
  .primary-nav { display: block; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none; }
}

/* ---------- Hero ---------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--graphite);
}
.hero-media { position: absolute; inset: 0; }
.hero-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center 62%;
  will-change: transform;
}
.hero-content { position: relative; width: 100%; z-index: 1; }
.hero-panel {
  background: var(--paper);
  border-top: 1px solid var(--graphite);
  padding: clamp(2.25rem, 6vw, 3.75rem) var(--container-pad) 0;
  max-width: 100%;
}
.hero-panel .eyebrow { color: var(--label); }
.hero-panel h1 {
  font-family: var(--font-display);
  font-size: var(--size-hero);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -0.01em;
  max-width: 18ch;
}
.hero-lede {
  margin-top: 1.5rem;
  max-width: 46ch;
  color: var(--graphite-soft);
  font-size: 1.09rem;
}
.hero-actions {
  margin-top: 2.25rem;
  padding-bottom: clamp(2.25rem, 6vw, 3.75rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 2rem;
}
.hero .dim-rule { background: var(--paper); }

@media (min-width: 640px) {
  .hero-panel { max-width: 40rem; }
}

/* ---------- Section shells ---------------------------------------------- */
main section { position: relative; }
.section-head { max-width: 46rem; margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.section-head h2 {
  font-family: var(--font-display);
  font-size: var(--size-h2);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

/* ---------- Principle / blueprint spread ------------------------------ */
.principle {
  background: var(--blueprint-dark);
  color: var(--paper);
  padding-block: var(--section-pad);
}
.principle-grid {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
  align-items: center;
}
.principle-text .eyebrow { color: var(--blueprint-line); }
.principle-statement {
  font-family: var(--font-display);
  font-size: var(--size-statement);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.005em;
}
.principle-support {
  margin-top: 1.5rem;
  max-width: 42ch;
  color: rgba(243, 238, 225, 0.78);
  font-size: 1.05rem;
}
.principle-list {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid rgba(191, 216, 232, 0.28);
  padding-top: 1.75rem;
}
.principle-list li {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 0.9rem;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
}
.principle-list li span:first-child { color: var(--accent-on-dark); }
.principle-diagram {
  border: 1px solid rgba(191, 216, 232, 0.32);
  padding: clamp(1.5rem, 4vw, 2.5rem);
}
.principle-diagram svg {
  width: 100%; height: auto;
  color: var(--blueprint-line);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
.principle-diagram .diagram-hidden { stroke-dasharray: 4 4; opacity: 0.7; }
.principle-diagram .diagram-sun { stroke-dasharray: 2 5; opacity: 0.85; }
.diagram-legend {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blueprint-line);
}
.diagram-legend li { display: flex; align-items: center; gap: 0.55rem; }
.diagram-legend li::before {
  content: "";
  width: 0.7rem; height: 1px;
  background: var(--accent-on-dark);
  flex-shrink: 0;
}

@media (min-width: 900px) {
  .principle-grid { grid-template-columns: 1.05fr 0.95fr; }
}

/* ---------- Portfolio ---------------------------------------------- */
.portfolio { background: var(--paper); padding-block: var(--section-pad); }
.portfolio .section-head .eyebrow { color: var(--label); }

.project {
  display: grid;
  gap: 2rem;
  padding-block: clamp(2.5rem, 6vw, 4rem);
  border-top: 1px solid rgba(33, 30, 26, 0.14);
}
.project:last-child { padding-bottom: 0; }

.project-text { display: flex; flex-direction: column; gap: 1.25rem; order: 1; }
.project-media { order: 2; }
.project-meta { color: var(--label); }
.project-statement {
  font-family: var(--font-display);
  font-size: var(--size-h3);
  font-weight: 600;
  line-height: 1.28;
}
.project-diagram {
  border: 1px solid rgba(33, 30, 26, 0.18);
  padding: 1.1rem 1.25rem 1.25rem;
  max-width: 15rem;
}
.project-diagram svg {
  width: 100%; height: auto;
  color: var(--graphite);
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: square;
  stroke-linejoin: miter;
}
.project-diagram .diagram-hidden { stroke-dasharray: 3 4; opacity: 0.65; }
.project-diagram figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--label);
}
.project-body { color: var(--graphite-soft); max-width: 42ch; }

.project-figure { position: relative; overflow: hidden; }
.project-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  transition: transform 0.6s var(--ease);
}
.project:hover .project-figure img { transform: scale(1.035); }
.project-tag {
  position: absolute;
  left: 0.9rem;
  bottom: 0.9rem;
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--graphite);
}

@media (min-width: 900px) {
  .project { grid-template-columns: 1fr 1fr; align-items: center; gap: 3.5rem; }
  .project--reverse .project-text { order: 2; }
  .project--reverse .project-media { order: 1; }
}

/* ---------- Contact ---------------------------------------------- */
.contact { background: var(--paper-deep); padding-block: var(--section-pad); }
.contact-grid { display: grid; gap: clamp(2.5rem, 6vw, 4rem); }
.contact-info .eyebrow { color: var(--label); }
.contact-info h2 {
  font-family: var(--font-display);
  font-size: var(--size-h2);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.contact-lede { margin-top: 1.25rem; max-width: 40ch; color: var(--graphite-soft); }

.contact-list { margin-top: 2.25rem; display: flex; flex-direction: column; gap: 1.1rem; }
.contact-list li { display: flex; align-items: flex-start; gap: 0.9rem; }
.contact-list .icon { color: var(--accent-dark); margin-top: 0.15rem; }
.contact-list a:hover { color: var(--accent-dark); }
.contact-list dt { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--label); }
.contact-list dd { margin: 0.15rem 0 0; }

.contact-form {
  background: var(--paper);
  border: 1px solid rgba(33, 30, 26, 0.16);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}
.form-row { display: flex; flex-direction: column; gap: 0.5rem; }
.form-row label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--label);
}
.form-row input,
.form-row textarea {
  background: var(--paper);
  border: 1px solid var(--graphite-soft);
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--graphite);
  transition: border-color 0.2s var(--ease);
}
.form-row input:focus,
.form-row textarea:focus { border-color: var(--accent-dark); }
.form-row textarea { resize: vertical; min-height: 8rem; }
.contact-form .btn-primary { align-self: flex-start; }
#form-status { font-family: var(--font-mono); font-size: 0.875rem; min-height: 1.2em; }
#form-status[data-state="success"] { color: var(--accent-dark); }

@media (min-width: 900px) {
  .contact-grid { grid-template-columns: 0.9fr 1.1fr; }
}

/* ---------- Footer ---------------------------------------------- */
.site-footer { background: var(--ink-dark); color: var(--paper); }
.footer-top {
  padding-block: clamp(3rem, 6vw, 4.5rem);
  display: grid;
  gap: 2.5rem;
}
.footer-brand .logo { color: var(--paper); }
.footer-brand .logo-mark { color: var(--accent-on-dark); }
.footer-brand p { margin-top: 1rem; max-width: 30ch; color: rgba(243, 238, 225, 0.68); font-size: 0.95rem; }
.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-on-dark);
  margin-bottom: 1.1rem;
}
.footer-nav ul,
.footer-contact ul,
.footer-hours ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-nav a:hover,
.footer-contact a:hover { color: var(--accent-on-dark); }
.footer-social { display: flex; gap: 0.9rem; margin-top: 1.5rem; }
.footer-social a {
  width: 2.5rem; height: 2.5rem;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid rgba(243, 238, 225, 0.3);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.footer-social a:hover { border-color: var(--accent-on-dark); color: var(--accent-on-dark); }
.footer-bottom {
  border-top: 1px solid rgba(243, 238, 225, 0.16);
  padding-block: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: rgba(243, 238, 225, 0.6);
}

@media (min-width: 640px) {
  .footer-top { grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr; }
}

/* ---------- Reveal / motion ---------------------------------------------- */
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }
.reveal-group .reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal-group .reveal:nth-child(3) { transition-delay: 0.16s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; }
  .hero-media img { transform: none !important; }
}

/* ---------- Utility breakpoints for section padding at small sizes ---- */
@media (max-width: 639px) {
  .hero-actions { gap: 1rem; }
}