/*
Site Fernand Yvon Architectes — feuille de style.
*/

:root {
  --paper: #FFFFFF;
  --paper-raised: #FAFAF9;
  --ink: #0A0A0A;
  --ink-soft: #55564F;
  --ink-faint: #97988F;
  --line: #E4E4DF;
  --line-strong: #C9C9C1;
  --accent: #0A0A0A;
  --accent-ink: #FFFFFF;
  --focus: #C1401E;
  --sidebar-w: clamp(220px, 18vw, 300px);
  --shadow: 0 18px 44px -22px rgba(22,24,26,0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0E0E0D;
    --paper-raised: #181816;
    --ink: #F2F1EA;
    --ink-soft: #A9AA9F;
    --ink-faint: #6E6F66;
    --line: #2C2C28;
    --line-strong: #3E3E37;
    --accent: #F2F1EA;
    --accent-ink: #0E0E0D;
    --focus: #E36B45;
    --shadow: 0 18px 44px -20px rgba(0,0,0,0.6);
  }
  .brand-icon, .wordmark-img { filter: brightness(0) invert(1); }
}
:root[data-theme="dark"] {
  --paper: #0E0E0D;
  --paper-raised: #181816;
  --ink: #F2F1EA;
  --ink-soft: #A9AA9F;
  --ink-faint: #6E6F66;
  --line: #2C2C28;
  --line-strong: #3E3E37;
  --accent: #F2F1EA;
  --accent-ink: #0E0E0D;
  --focus: #E36B45;
  --shadow: 0 18px 44px -20px rgba(0,0,0,0.6);
}
:root[data-theme="dark"] .brand-icon, :root[data-theme="dark"] .wordmark-img { filter: brightness(0) invert(1); }

* { box-sizing: border-box; }
html { color-scheme: light dark; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Archivo', system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, h3 { text-wrap: balance; margin: 0; }
p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.mono {
  font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

.eyebrow {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ---------- shell ---------- */
.shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

/* ---------- home page: tighter side margins ---------- */
#view-home .shell {
  max-width: 1600px;
  padding: 0 clamp(10px, 1.6vw, 24px);
}

/* ---------- sidebar (fixed left column, à la BTA) ---------- */
.site-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(20px, 2.6vw, 32px) clamp(18px, 2.2vw, 28px);
  border-right: 1px solid var(--line);
  background: var(--paper);
  z-index: 40;
  overflow-y: auto;
}
.brand-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}
.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}
.brand-icon { height: 46px; width: auto; flex: none; display: block; filter: brightness(0) saturate(100%); opacity: 0.94; }
.wordmark-img { height: 47px; width: auto; display: block; filter: brightness(0) saturate(100%); opacity: 0.94; }
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 30px;
  height: 22px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  flex: none;
}
.menu-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.site-sidebar.nav-open .menu-toggle-bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.site-sidebar.nav-open .menu-toggle-bar:nth-child(2) { opacity: 0; }
.site-sidebar.nav-open .menu-toggle-bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.site-nav {
  display: none;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  margin-top: clamp(20px, 4vh, 36px);
}
.site-sidebar.nav-open .site-nav { display: flex; }
.nav-link {
  font-family: 'Open Sans', 'Segoe UI', sans-serif;
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  line-height: 1.28;
  color: var(--ink);
  padding: 0;
  border: none;
  transition: opacity 0.15s ease;
}
.nav-link:hover { opacity: 0.55; }
.nav-link--solid {
  margin-top: 18px;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}
.nav-link--solid:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
  opacity: 1;
}
.nav-icon {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 26px;
  height: 26px;
  flex: none;
  margin-top: 22px;
  opacity: 0.9;
  transition: opacity 0.15s ease, transform 0.15s ease;
}
.nav-icon svg { width: 22px; height: 22px; }
.nav-icon:hover { opacity: 1; transform: scale(1.06); }
.sidebar-foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: 'Open Sans', 'Segoe UI', sans-serif;
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.45;
}
.sidebar-foot p { margin: 0; }
.sidebar-foot-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
}
.sidebar-foot a { color: inherit; }
.sidebar-foot a:hover { color: var(--ink); }

.site-main {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
}

/* ---------- hero ---------- */
.hero {
  margin-bottom: clamp(48px, 6vw, 80px);
}
.hero-frame {
  position: relative;
  display: block;
  width: 100%;
}
.hero-frame-inner {
  position: relative;
  overflow: hidden;
}
.hero-frame img {
  width: 100%;
  height: clamp(360px, 62vw, 760px);
  object-fit: cover;
  display: block;
}
.hero-tag {
  position: absolute;
  left: 18px;
  bottom: 18px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  padding: 8px 14px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.hero-tag .code {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.78rem;
}
.hero-tag .name {
  font-weight: 700;
  font-size: 0.92rem;
}

/* ---------- category strip ---------- */
.categories {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: start;
  gap: clamp(16px, 2.4vw, 28px);
  padding-top: clamp(36px, 5vw, 56px);
  padding-bottom: clamp(48px, 6vw, 80px);
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(48px, 6vw, 80px);
}
.cat-frame {
  position: relative;
  overflow: hidden;
}
.cat-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(.2,.8,.2,1);
}
.cat:hover .cat-frame img { transform: scale(1.03); }
.cat h3 {
  margin-top: 8px;
  text-align: center;
  font-family: 'Open Sans', 'Segoe UI', sans-serif;
  font-size: clamp(1.02rem, 2.08vw, 1.7rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--ink);
}

/* ---------- realisations grid ---------- */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: clamp(20px, 3vw, 32px);
}
.section-head h2 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 800;
}
.section-count {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  color: var(--ink-faint);
  white-space: nowrap;
}

.grid {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 1.6vw, 20px);
  padding-bottom: clamp(64px, 8vw, 100px);
}
.grid-col {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-width: 0;
  gap: clamp(14px, 1.6vw, 20px);
}
.tile {
  display: block;
  position: relative;
}

.tile-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--paper-raised);
}
.tile-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.0);
  transition: transform 0.6s cubic-bezier(.2,.8,.2,1);
}
.tile:hover .tile-frame img, .tile:focus-visible .tile-frame img {
  transform: scale(1.03);
}
.tile-tick { display: none; }

.tile-cap {
  padding: 12px 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 2px 8px;
  transition: opacity 0.2s ease;
}
.tile:hover .tile-cap { opacity: 0.6; }
.tile-code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.66rem;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
}
.tile-name {
  color: var(--ink);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.tile-loc { color: var(--ink-soft); font-size: 0.78rem; width: 100%; }

.tile--text .tile-text-body {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line-strong);
  background: var(--paper-raised);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 16px;
  gap: 4px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.tile--text:hover .tile-text-body, .tile--text:focus-visible .tile-text-body {
  border-color: var(--accent);
}
.tile-text-code {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.tile-text-name { font-weight: 700; font-size: 1.05rem; color: var(--ink); }
.tile-text-loc { font-size: 0.8rem; color: var(--ink-soft); }
.tile-text-note {
  margin-top: 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- about ---------- */
.about {
  border-top: 1px solid var(--line);
  padding: clamp(48px, 7vw, 88px) 0;
}
.about-top {
  margin-bottom: clamp(40px, 6vw, 64px);
}
.about h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 800;
}
.about-rows {
  border-top: 1px solid var(--line);
}
.about-row {
  padding: clamp(24px, 3.2vw, 36px) 0;
  border-bottom: 1px solid var(--line);
}
.about-row h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.about-row p {
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.6;
  max-width: 62ch;
}
.about-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  max-width: 62ch;
}
.about-list li {
  position: relative;
  padding-left: 22px;
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.55;
  margin-bottom: 8px;
}
.about-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--accent);
}
.about-tagline {
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: clamp(28px, 4vw, 40px);
  border-top: 1px solid var(--line);
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

/* ---------- footer ---------- */
.site-footer {
  margin-left: var(--sidebar-w);
  border-top: 1px solid var(--line);
  padding: clamp(28px, 4vw, 44px) 0 clamp(36px, 5vw, 56px);
}
.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}
.footer-brand .brand-icon { height: 56px; }
.footer-brand .wordmark { height: 56px; }
.footer-block .eyebrow { margin-bottom: 8px; }
.footer-block p, .footer-block a {
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.footer-block a:hover { color: var(--accent); }
.footer-note {
  margin-top: 28px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
}

/* ---------- project detail view ---------- */
.proj { padding-bottom: clamp(48px, 6vw, 80px); }
.proj-body {
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(28px, 4vw, 48px) clamp(20px, 4vw, 48px) 0;
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 32px);
}
.proj-intro-block {
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(20px, 3vw, 32px);
  display: grid;
  grid-template-columns: minmax(0, 640px) minmax(260px, 420px);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 22px;
  grid-column: 1 / -1;
}
.back-link:hover { color: var(--accent); }
.proj-eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.proj-intro-block h1 {
  font-size: clamp(1.8rem, 2.6vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.proj-intro {
  color: var(--ink-soft);
  font-size: 1.02rem;
  margin-bottom: 0;
}
.specs {
  border-top: 1px solid var(--line);
  margin: 0;
}
.spec-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 6px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}
.spec-row dt {
  font-weight: 700;
  color: var(--ink);
}
.spec-row dt::after { content: " :"; font-weight: 700; }
.spec-row dd {
  margin: 0;
  font-weight: 400;
  color: var(--ink-soft);
}
.proj-media {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding-bottom: 20px;
}
.proj-gallery {
  column-count: 3;
  column-gap: 14px;
}
.gal-item {
  border: 1px solid var(--line);
  overflow: hidden;
  break-inside: avoid;
  margin-bottom: 16px;
  display: block;
}
.gal-item img { display: block; width: 100%; height: auto; object-fit: cover; }
.gal-item--wide { column-span: all; }

.schemas-section {
  margin-top: 8px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.schemas-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.schemas-grid > .schema-item--wide {
  grid-column: 1 / -1;
}
.schemas-grid > .schema-item--wide img {
  max-width: 480px;
  margin: 0 auto;
}
.schemas-grid--compact {
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
}
.schemas-grid--compact .schema-item {
  padding: 0;
  border: none;
  background: transparent;
}
.schemas-grid--flat .schema-item {
  padding: 0;
  border: none;
  background: transparent;
}
.schemas-grid--aligned {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 28px;
}
.schemas-grid--aligned .schema-item--aligned {
  margin: 0;
  border: none;
  background: transparent;
  padding: 0;
  width: auto;
  text-align: center;
}
.schemas-grid--aligned .schema-item--aligned img {
  display: block;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  margin: 0 auto;
}
.schemas-grid--aligned .schema-item--aligned figcaption {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.4;
}
.schemas-side {
  display: grid;
  grid-template-columns: minmax(140px, 220px) 1fr;
  gap: 20px;
  align-items: stretch;
}
.schemas-side-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}
.schemas-side-stack .schema-item {
  margin: 0;
  border: none;
  background: transparent;
  padding: 0;
}
.schemas-side-big {
  margin: 0;
  align-self: stretch;
  display: flex;
  align-items: center;
}
.schemas-side-big img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}
@media (max-width: 640px) {
  .schemas-side { grid-template-columns: 1fr; }
}
.schema-item {
  margin: 0;
  border: 1px solid var(--line);
  background: #FFFFFF;
  padding: clamp(14px, 2vw, 22px);
  align-self: start;
}
.schema-item img { display: block; width: 100%; height: auto; object-fit: contain; }
.schema-item figcaption {
  margin-top: 10px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.4;
}
.plans-section {
  margin-top: 8px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.plans-heading {
  margin: 0 0 16px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.plans-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.plans-grid--row {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}
.plans-grid--row .plan-item {
  flex: 0 1 auto;
}
.plan-item {
  margin: 0;
  align-self: start;
}
.plan-item img { display: block; width: 100%; height: auto; object-fit: contain; }
.plan-item figcaption {
  margin-top: 10px;
  font-size: 0.76rem;
  color: var(--ink-soft);
  font-weight: 500;
}

/* ---------- category filter bar ---------- */
.cat-filter-bar { padding-top: clamp(20px, 3vw, 32px); }
.cat-filter-bar[hidden], .categories[hidden] { display: none; }
.cat-view-title {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 800;
  margin: 8px 0 0;
}
.cat-empty {
  color: var(--ink-soft);
  font-size: 0.96rem;
  padding: 16px 0 0;
}

/* ---------- view switching ---------- */
#view-home[hidden], .proj[hidden] { display: none; }
.tile[hidden] { display: none; }

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

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .site-sidebar {
    position: sticky;
    top: 0;
    left: auto;
    bottom: auto;
    width: auto;
    height: auto;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 14px clamp(18px, 4vw, 28px);
    overflow-y: visible;
  }
  .site-sidebar > div:first-child { width: 100%; }
  .brand-block {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 12px;
  }
  .brand { flex-direction: row; align-items: center; gap: 10px; }
  .brand-icon { height: 30px; }
  .wordmark-img { height: 34px; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 6px clamp(18px, 4vw, 28px) 26px;
    margin-top: 0;
    box-shadow: 0 16px 28px -20px rgba(0,0,0,0.25);
  }
  .nav-link { font-size: 1.3rem; }
  .nav-link--solid { margin-top: 14px; }
  .sidebar-foot { display: none; }
  .site-main { margin-left: 0; }
  .site-footer { margin-left: 0; }
  .proj-intro-block { grid-template-columns: 1fr; }
  .proj-gallery { column-count: 2; }
}
@media (max-width: 520px) {
  .categories { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid { flex-direction: column; }
  .grid-col { width: 100%; }
  .proj-intro-block { grid-template-columns: 1fr; }
  .proj-gallery { column-count: 1; }
  .schemas-grid { grid-template-columns: 1fr; }
  .plans-grid { grid-template-columns: 1fr; }
  .plans-grid--row .plan-item { flex: 1 1 100%; max-width: 100% !important; }
}