/* guandeng.de — architecture-studio aesthetic.
   - Restrained palette: cream paper, charcoal text, single accent (warm ochre).
   - Type: serif display (Cormorant Garamond local fallback) + clean sans body.
   - Generous negative space, single-column-first, large hero, quiet UI.
   - Self-hosted fonts only (CSP-friendly).
*/

/* ---------- Self-hosted fonts (system stack only — no external CDN to keep CSP strict) ----------
   We rely on the user's OS-installed serif + sans. This is intentional: zero network requests
   for fonts, perfect performance, and the elegant feel comes from spacing + restraint, not from
   a custom typeface that AI-slop sites lean on.
*/

:root {
  /* Palette */
  --paper:        #f6f3ee;   /* warm cream */
  --paper-deep:   #ece6dc;   /* card surface */
  --ink:          #1c1b18;   /* near-black */
  --ink-mute:     #5a554c;   /* secondary text */
  --rule:         #cfc7b8;   /* hairline rules */
  --accent:       #8a5a2b;   /* warm ochre (architecture-studio brown) */
  --accent-hover: #6e4621;
  --success:      #2f5d3a;
  --error:        #7a2a1e;

  /* Type — type stack only; no external fonts */
  --font-serif: "Cormorant Garamond", "EB Garamond", "Times New Roman", Times, Georgia, serif;
  --font-sans:  -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono:  "SF Mono", Menlo, Monaco, Consolas, monospace;

  /* Spacing scale (8-px base) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 7rem;

  --content-max: 68rem;       /* about 1088px */
  --measure: 38rem;           /* paragraph max width — readable measure */
  --hairline: 1px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.55;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover, a:focus { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -10000px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 1rem;
  z-index: 1000;
  font-size: 14px;
}
.skip-link:focus, .skip-link:focus-visible {
  left: 1rem;
  top: 1rem;
}

/* ---------- Layout primitives ---------- */

.container {
  max-width: var(--content-max);
  padding-left: var(--space-3);
  padding-right: var(--space-3);
  margin-left: auto;
  margin-right: auto;
}

.measure { max-width: var(--measure); }

/* ---------- Header / Navigation ---------- */

.site-header {
  border-bottom: var(--hairline) solid var(--rule);
  padding: var(--space-3) 0;
  position: sticky;
  top: 0;
  background: rgba(246, 243, 238, 0.92);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  z-index: 50;
}
.site-header__inner {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  justify-content: space-between;
}
.site-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
}
.site-logo:hover { color: var(--ink); text-decoration: none; }
.site-logo small {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 0.35rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}
.site-nav a:hover, .site-nav a.is-active {
  color: var(--accent);
  text-decoration: none;
}
.site-nav a.is-active { border-bottom: 1.5px solid var(--accent); padding-bottom: 2px; }

.lang-toggle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
}
.lang-toggle:hover { color: var(--ink); border-color: var(--ink); text-decoration: none; }

/* Mobile nav */
@media (max-width: 720px) {
  .site-header__inner { flex-direction: column; gap: var(--space-2); align-items: stretch; }
  .site-nav { gap: var(--space-2) var(--space-3); justify-content: flex-start; }
  .site-logo { font-size: 1.3rem; }
}

/* ---------- Hero (home page) ---------- */

.hero {
  position: relative;
  padding: 0 0 var(--space-6) 0;
  border-bottom: var(--hairline) solid var(--rule);
  background: var(--paper);
  overflow: hidden;
}
.hero__image {
  margin: 0;
  width: 100%;
  aspect-ratio: 24 / 11;
  max-height: 70vh;
  overflow: hidden;
  background: var(--paper-deep);
}
.hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 30%;
  display: block;
  /* subtle desaturation for editorial look — keeps the cream palette dominant */
  filter: saturate(0.85);
}
.hero__inner {
  padding-top: var(--space-6);
}
.hero__eyebrow {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-3) 0;
}
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3) 0;
}
.hero__subtitle {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  font-weight: 400;
  font-style: italic;
  color: var(--ink-mute);
  max-width: 36rem;
  line-height: 1.35;
  margin: 0 0 var(--space-4) 0;
}
.hero__ctas {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  padding: 0.85rem 1.5rem;
  border-radius: 2px;
  border: 1px solid currentColor;
  background: transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
  text-align: center;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn--primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn--primary:hover { background: var(--accent); border-color: var(--accent); color: var(--paper); }
.btn--secondary { color: var(--ink); border-color: var(--ink); }
.btn--secondary:hover { color: var(--accent); border-color: var(--accent); }
.btn--ghost { color: var(--ink-mute); border-color: var(--rule); }
.btn--ghost:hover { color: var(--ink); border-color: var(--ink); }

/* ---------- Section layout ---------- */

.section {
  padding: var(--space-6) 0;
}
.section--alt { background: var(--paper-deep); }
.section + .section { border-top: var(--hairline) solid var(--rule); }
.section--alt + .section { border-top: 0; }

.section__eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 var(--space-2) 0;
}
.section__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.005em;
  margin: 0 0 var(--space-3) 0;
}
.section__lead {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--ink-mute);
  line-height: 1.4;
  max-width: var(--measure);
  margin: 0 0 var(--space-4) 0;
}
.section__body { max-width: var(--measure); }
.section__body p { margin: 0 0 var(--space-2) 0; }

/* Pillars (3-up cards on home) */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}
.pillar h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 500;
  margin: 0 0 var(--space-1) 0;
}
.pillar p {
  font-size: 0.96rem;
  color: var(--ink-mute);
  margin: 0;
}
@media (max-width: 880px) {
  .pillars { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* ---------- FAQ (dance / ai pages) ---------- */

.faq {
  max-width: 46rem;
}
.faq__item {
  border-bottom: 1px solid var(--rule);
  padding: var(--space-2) 0;
}
.faq__item:first-child { border-top: 1px solid var(--rule); }
.faq__q {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 500;
  cursor: pointer;
  padding: var(--space-1) 0;
  list-style: none;
  position: relative;
  padding-right: 2rem;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after {
  content: "+";
  position: absolute;
  right: 0;
  top: var(--space-1);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--ink-mute);
  transition: transform 0.18s ease;
}
.faq__item[open] .faq__q::after { content: "−"; }
.faq__a {
  color: var(--ink-mute);
  line-height: 1.65;
  padding: var(--space-1) 0 var(--space-2) 0;
  max-width: 42rem;
}

/* ---------- Timeline (about page) ---------- */

.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: var(--hairline) solid var(--rule);
}
.timeline > li:first-child { border-top: 0; padding-top: 0; }
.timeline__year {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  padding-top: 0.4rem;
}
.timeline__title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0 0 var(--space-1) 0;
}
.timeline__body {
  font-size: 0.98rem;
  margin: 0;
  color: var(--ink);
}
@media (max-width: 720px) {
  .timeline > li { grid-template-columns: 1fr; gap: var(--space-1); }
  .timeline__year { padding-top: 0; }
}

/* ---------- Press / quotes ---------- */

.quote {
  border-left: 2px solid var(--accent);
  padding: var(--space-2) var(--space-3);
  margin: 0 0 var(--space-4) 0;
}
.quote p {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-style: italic;
  line-height: 1.4;
  margin: 0 0 var(--space-2) 0;
  color: var(--ink);
}
.quote__attribution {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--ink-mute);
  letter-spacing: 0.02em;
  margin: 0;
}
.quote__attribution strong { color: var(--ink); font-weight: 500; }

/* ---------- Service cards (dance / ai pages) ---------- */

.services {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-5);
}
.service h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  margin: 0 0 var(--space-1) 0;
}
.service p { margin: 0; color: var(--ink-mute); }
@media (max-width: 760px) { .services { grid-template-columns: 1fr; gap: var(--space-3); } }

/* ---------- Gallery ---------- */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-2);
}
.gallery-item {
  background: var(--paper-deep);
  position: relative;
  overflow: hidden;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/5;
  display: block;
  transition: transform 400ms ease;
}
.gallery-item:hover img { transform: scale(1.02); }
.gallery-item__caption {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--ink-mute);
  padding: var(--space-1) var(--space-2);
  background: var(--paper);
  border-top: var(--hairline) solid var(--rule);
}

/* ---------- Forms ---------- */

.form {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  max-width: 36rem;
}
.form label {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--ink);
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
  display: block;
  font-weight: 500;
}
.form input[type="text"],
.form input[type="email"],
.form input[type="tel"],
.form input[type="password"],
.form input[type="date"],
.form select,
.form textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
  border-radius: 2px;
  -webkit-appearance: none;
  appearance: none;
}
.form input:focus,
.form select:focus,
.form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 0;
  border-color: var(--accent);
}
.form textarea { min-height: 8rem; line-height: 1.5; resize: vertical; }
.form .field { margin-bottom: var(--space-1); }
.form .field__hint {
  font-size: 0.82rem;
  color: var(--ink-mute);
  margin-top: 0.3rem;
}
.form .field--required label::after {
  content: " *";
  color: var(--accent);
}
.form .honeypot {
  position: absolute !important;
  left: -10000px !important;
  width: 1px; height: 1px; overflow: hidden;
}
.form__actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
  margin-top: var(--space-2);
  flex-wrap: wrap;
}
.form__privacy {
  font-size: 0.82rem;
  color: var(--ink-mute);
  max-width: 28rem;
}

.alert {
  padding: 0.85rem 1rem;
  border-radius: 2px;
  margin-bottom: var(--space-2);
  font-size: 0.95rem;
}
.alert--success { background: #e7eee0; color: var(--success); border-left: 3px solid var(--success); }
.alert--error   { background: #f0e0dc; color: var(--error);   border-left: 3px solid var(--error); }
.alert--info    { background: var(--paper-deep); color: var(--ink-mute); border-left: 3px solid var(--rule); }

/* ---------- Footer ---------- */

.site-footer {
  border-top: var(--hairline) solid var(--rule);
  padding: var(--space-5) 0 var(--space-4) 0;
  margin-top: var(--space-6);
  background: var(--paper-deep);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--space-4);
  align-items: start;
}
.site-footer h4 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 var(--space-1) 0;
  font-weight: 500;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.4rem; }
.site-footer a { color: var(--ink); text-decoration: none; font-size: 0.95rem; }
.site-footer a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.site-footer__copy {
  font-size: 0.82rem;
  color: var(--ink-mute);
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: var(--hairline) solid var(--rule);
}
@media (max-width: 720px) {
  .site-footer__inner { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* ---------- Admin (kept simple, distinct from public aesthetic) ---------- */
.admin-shell { padding: var(--space-4) 0; }
.admin-shell h1 { font-family: var(--font-serif); font-size: 2rem; margin: 0 0 var(--space-2); }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.admin-table th, .admin-table td {
  text-align: left; padding: 0.55rem 0.6rem; border-bottom: var(--hairline) solid var(--rule);
}
.admin-table th { font-weight: 500; color: var(--ink-mute); }
.admin-table td.status-pending { color: #8a6a1f; }
.admin-table td.status-confirmed { color: var(--success); }
.admin-table td.status-declined { color: var(--error); }
.admin-table td.status-expired,
.admin-table td.status-superseded { color: var(--ink-mute); }
.admin-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4);
}
@media (max-width: 880px) { .admin-grid { grid-template-columns: 1fr; } }

/* ---------- Print + reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ---------- Selection ---------- */
::selection { background: var(--accent); color: var(--paper); }

/* ---------- Blog ---------- */
.container--narrow {
  max-width: 44rem;
}

.blog-list { display: flex; flex-direction: column; gap: var(--space-5); }
.blog-list__item { padding-bottom: var(--space-4); border-bottom: var(--hairline) solid var(--rule); }
.blog-list__item:last-child { border-bottom: 0; }
.blog-list__meta {
  font-size: 0.85rem;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 var(--space-1);
}
.blog-list__sep { margin: 0 0.5em; opacity: 0.5; }
.blog-list__tag {
  display: inline-block;
  margin-right: 0.35em;
  color: var(--accent);
  font-weight: 500;
  text-transform: lowercase;
  letter-spacing: 0;
}
.blog-list__title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  line-height: 1.2;
  margin: 0 0 var(--space-1);
  letter-spacing: -0.01em;
}
.blog-list__title a { color: var(--ink); text-decoration: none; }
.blog-list__title a:hover { color: var(--accent); text-decoration: none; }
.blog-list__excerpt {
  color: var(--ink-mute);
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0 0 var(--space-1);
  max-width: 42rem;
}
.blog-list__more { margin: 0; font-size: 0.95rem; }

.blog-post { padding-top: var(--space-5); padding-bottom: var(--space-6); }
.blog-post__back { font-size: 0.95rem; margin: 0 0 var(--space-3); }
.blog-post__header { margin-bottom: var(--space-4); }
.blog-post__meta {
  font-size: 0.85rem;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
}
.blog-post__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-2);
}
.blog-post__lead {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink-mute);
  margin: 0;
  max-width: 38rem;
}
.blog-post__hero {
  margin: 0 0 var(--space-5);
}
.blog-post__hero img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 2px;
}
.blog-post__body {
  font-size: 1.06rem;
  line-height: 1.72;
  color: var(--ink);
}

/* prose: typography for rendered markdown */
.prose > * + * { margin-top: var(--space-2); }
.prose p { margin: 0; }
.prose h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  line-height: 1.3;
  margin: var(--space-4) 0 var(--space-1);
  letter-spacing: -0.01em;
}
.prose h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  margin: var(--space-3) 0 var(--space-1);
}
.prose h4 { font-size: 1.1rem; margin: var(--space-2) 0 var(--space-1); }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose ul, .prose ol { padding-left: 1.4em; margin: var(--space-1) 0; }
.prose li + li { margin-top: 0.4em; }
.prose blockquote {
  margin: var(--space-3) 0;
  padding: 0.6em 0 0.6em 1.2em;
  border-left: 3px solid var(--accent);
  color: var(--ink-mute);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
}
.prose blockquote p { margin: 0; }
.prose code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Monaco, "Cascadia Mono", Consolas, monospace;
  font-size: 0.92em;
  background: var(--paper-deep);
  padding: 0.12em 0.4em;
  border-radius: 2px;
}
.prose pre {
  margin: var(--space-3) 0;
  padding: var(--space-2);
  background: var(--paper-deep);
  border: var(--hairline) solid var(--rule);
  border-radius: 2px;
  overflow-x: auto;
  font-size: 0.92rem;
  line-height: 1.55;
}
.prose pre code { background: transparent; padding: 0; }
.prose img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--space-3) auto;
}
.prose hr {
  border: 0;
  border-top: var(--hairline) solid var(--rule);
  margin: var(--space-4) 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: var(--space-3) 0;
}
.prose th, .prose td {
  text-align: left;
  padding: 0.5rem 0.7rem;
  border-bottom: var(--hairline) solid var(--rule);
}
.prose th { font-weight: 500; color: var(--ink-mute); }
.prose figure { margin: var(--space-3) 0; }
.prose figcaption { font-size: 0.9rem; color: var(--ink-mute); margin-top: 0.4em; text-align: center; }

.blog-post__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--hairline) solid var(--rule);
}
.blog-post__navlink {
  display: block;
  color: var(--ink);
  text-decoration: none;
}
.blog-post__navlink:hover { color: var(--accent); text-decoration: none; }
.blog-post__navlink:hover .blog-post__navtitle { color: var(--accent); }
.blog-post__navdir {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.3em;
}
.blog-post__navtitle {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.3;
  color: var(--ink);
}

@media (max-width: 720px) {
  .blog-post__nav { grid-template-columns: 1fr; }
  .blog-post__nav > div { text-align: left !important; }
}