/* 1. Variables */
:root {
  color-scheme: dark;

  --color-bg: #0c0f12;
  --color-bg-soft: #101419;
  --color-surface: #13181d;
  --color-surface-raised: #191f25;
  --color-surface-quiet: #11161b;
  --color-text: #f3f1ec;
  --color-text-muted: #aab2ba;
  --color-text-subtle: #7f8992;
  --color-accent: #d9782d;
  --color-accent-hover: #ed8a38;
  --color-accent-soft: rgba(217, 120, 45, 0.14);
  --color-border: #2a3239;
  --color-border-strong: #3a444d;
  --color-paper: #f2f0ea;
  --color-paper-muted: #e6e2d8;
  --color-paper-text: #202326;
  --color-focus: #f2b36f;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;

  --site-max: 1440px;
  --content-max: 1180px;
  --text-max: 720px;

  --space-1: 0.375rem;
  --space-2: 0.625rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.25rem;
  --space-6: 3.5rem;
  --space-7: 5rem;

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;

  --shadow-soft: 0 18px 48px rgba(0, 0, 0, 0.26);
  --shadow-paper: 0 18px 36px rgba(0, 0, 0, 0.34);
}

/* 2. Reset / base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  /* Explicit dark canvas on <html> itself (not just body): the meta
     color-scheme tag already tells the browser to paint a dark default
     before this stylesheet loads, this is a same-color reinforcement once
     it does, so no white edge is ever visible behind/around body. */
  background: var(--color-bg);
}

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-width: 320px;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0) 620px),
    linear-gradient(90deg, rgba(217, 120, 45, 0.055), rgba(217, 120, 45, 0) 22%, rgba(255, 255, 255, 0) 78%, rgba(217, 120, 45, 0.045)),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.95rem + 0.18vw, 1.075rem);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.58), transparent 58%);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-underline-offset: 0.22em;
  transition:
    color 160ms ease,
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease,
    opacity 160ms ease;
}

a:hover {
  color: var(--color-accent-hover);
}

ul,
ol {
  padding-left: 1.2rem;
}

figure {
  margin: 0;
}

figcaption {
  margin-top: var(--space-2);
  color: var(--color-text-subtle);
  font-size: clamp(0.78rem, 0.74rem + 0.12vw, 0.86rem);
  line-height: 1.45;
}

address {
  font-style: normal;
}

/* 3. Typographie */
h1,
h2,
h3,
h4,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  line-height: 1.1;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  overflow-wrap: normal;
  font-weight: 780;
  word-break: keep-all;
}

/* Each page has exactly one h1: the Hero title on Accueil (huge, via .hero h1),
   or a page-title-styled h1 on every other page (same visual weight as the
   former shared h2 section title, kept for index.html's #preuves heading). */
.hero h1 {
  font-size: clamp(2.45rem, 1.55rem + 3.15vw, 5.15rem);
  text-wrap: balance;
}

h2,
.page-title {
  max-width: var(--text-max);
  margin: 0 0 var(--space-4);
  font-size: clamp(1.85rem, 1.45rem + 1.55vw, 3rem);
  font-weight: 720;
}

h3,
.section-title {
  margin: 0;
  font-size: clamp(1.1rem, 1rem + 0.42vw, 1.42rem);
  font-weight: 680;
}

h4,
.label-title {
  margin: 0 0 var(--space-1);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  font-weight: 760;
  text-transform: uppercase;
}

p {
  margin: 0;
}

p + p {
  margin-top: var(--space-3);
}

.hero__eyebrow,
.project__label,
.proof-card figcaption,
.project figcaption,
.hero__credibility,
.contact p:nth-last-child(-n + 3) {
  color: var(--color-text-muted);
}

.proof-card li,
.project__section[aria-labelledby$="-data-title"] li,
.hero__credibility,
.method__steps .section-title {
  font-family: var(--font-mono);
}

/* 4. Layout */
.site-header,
main > section,
.site-footer {
  padding-right: clamp(1rem, 4vw, 3rem);
  padding-left: clamp(1rem, 4vw, 3rem);
}

main > section {
  width: min(92vw, var(--site-max));
  margin: 0 auto;
  padding-top: clamp(2.75rem, 5.5vw, 4rem);
  padding-bottom: clamp(2.75rem, 5.5vw, 4rem);
  scroll-margin-top: 92px;
}

main > section + section {
  border-top: 1px solid rgba(170, 178, 186, 0.12);
}

.services,
.method,
.skills,
.career,
.contact {
  width: min(88vw, var(--content-max));
}

.services > p,
.contact__primary > p,
.career > p,
.method > p {
  max-width: var(--text-max);
  color: var(--color-text-muted);
}

/* 5. Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 68px;
  border-bottom: 1px solid rgba(170, 178, 186, 0.14);
  background: rgba(12, 15, 18, 0.91);
  backdrop-filter: blur(12px);
}

.site-header__brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  text-decoration: none;
}

.site-header__logo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.site-header__wordmark {
  font-size: 0.92rem;
  font-weight: 740;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.35rem 0.58rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 0.88rem;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  border-color: var(--color-border);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.035);
}

.site-nav li:last-child a {
  border-color: rgba(217, 120, 45, 0.42);
  color: var(--color-text);
}

.site-nav a[aria-current="page"] {
  border-color: transparent;
  color: var(--color-accent-hover);
  background: transparent;
  font-weight: 720;
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

/* 6. Hero */
.hero {
  display: grid;
  gap: clamp(2rem, 4vw, 4.5rem);
  align-items: center;
  min-height: auto;
  padding-top: clamp(3rem, 5.5vw, 5.5rem);
  padding-bottom: clamp(2.25rem, 4.5vw, 4rem);
}

.hero__content {
  max-width: 820px;
}

.hero__eyebrow {
  margin-bottom: var(--space-3);
  font-size: clamp(0.95rem, 0.9rem + 0.22vw, 1.08rem);
  font-weight: 650;
}

.hero__headline {
  max-width: 780px;
  margin-top: var(--space-4);
  color: var(--color-text);
  font-size: clamp(1.35rem, 1.1rem + 1vw, 2.02rem);
  font-weight: 640;
  line-height: 1.28;
}

.hero__summary {
  max-width: 720px;
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: clamp(1.02rem, 0.95rem + 0.34vw, 1.22rem);
}

.hero__actions ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.hero__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.68rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 720;
  text-decoration: none;
}

.hero__action--primary {
  border-color: var(--color-accent);
  color: #17100b;
  background: var(--color-accent);
}

.hero__action--primary:hover {
  color: #17100b;
  background: var(--color-accent-hover);
}

.hero__action--secondary {
  color: var(--color-text);
  background: transparent;
}

.hero__action--secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.hero__credibility {
  margin-top: var(--space-4);
  font-size: clamp(0.78rem, 0.73rem + 0.2vw, 0.92rem);
}

.hero__media,
.proof-card__media,
.project__media figure,
.project__gallery figure {
  padding: var(--space-2);
  border: 1px solid rgba(42, 50, 57, 0.9);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  box-shadow: var(--shadow-paper);
}

.hero__media {
  padding: clamp(0.65rem, 1vw, 1rem);
}

.hero__media img,
.proof-card__media img,
.project__media img,
.project__gallery img {
  width: 100%;
  height: auto;
  max-height: 76vh;
  object-fit: contain;
  border: 1px solid rgba(32, 35, 38, 0.14);
  border-radius: var(--radius-xs);
  background: var(--color-paper-muted);
}

.hero__media figcaption,
.proof-card__media figcaption,
.project__media figcaption,
.project__gallery figcaption {
  color: rgba(32, 35, 38, 0.72);
}

.hero__media a,
.proof-card__media a,
.project__media a,
.project__gallery a {
  display: block;
  border-radius: var(--radius-xs);
  cursor: zoom-in;
}

.hero__media a:hover img,
.proof-card__media a:hover img,
.project__media a:hover img,
.project__gallery a:hover img {
  border-color: rgba(217, 120, 45, 0.6);
}

/* 7. Preuves */
.proofs__list {
  display: grid;
  gap: clamp(1rem, 2vw, 1.75rem);
}

.proof-card {
  display: grid;
  gap: var(--space-3);
  padding: clamp(1rem, 1.6vw, 1.35rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.042), rgba(255, 255, 255, 0.016)),
    var(--color-surface-quiet);
}

.proof-card h3 {
  margin-top: var(--space-1);
}

.proof-card p {
  color: var(--color-text-muted);
}

.proof-card ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.proof-card li {
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--color-text);
  font-size: 0.78rem;
  background: transparent;
}

.proof-card li + li::before {
  margin-right: var(--space-2);
  color: var(--color-accent);
  content: "·";
}

.proof-card > a {
  justify-self: start;
  color: var(--color-accent-hover);
  font-weight: 680;
}

.proofs__cta {
  margin-top: var(--space-4);
}

/* 8. Services */
.services__list {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
  counter-reset: services;
}

.service {
  position: relative;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  counter-increment: services;
}

.service::before {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-accent-hover);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  content: "0" counter(services);
}

.service p {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
}

/* 9. Réalisations */
.project {
  display: grid;
  gap: clamp(0.85rem, 1.55vw, 1.35rem);
  padding: clamp(1.25rem, 2.2vw, 2rem) clamp(0rem, 1.4vw, 1.25rem) 0;
  border-top: 1px solid var(--color-border);
  border-radius: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.022), rgba(255, 255, 255, 0));
  box-shadow: none;
  scroll-margin-top: 92px;
}

.project + .project {
  margin-top: clamp(2.35rem, 4vw, 3.25rem);
}

.project__label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  justify-self: start;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--color-accent-hover);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.project__label::before {
  width: 2rem;
  height: 1px;
  background: var(--color-accent);
  content: "";
}

.project > .section-title {
  max-width: 1120px;
  font-size: clamp(1.34rem, 1.03rem + 0.98vw, 2.28rem);
}

.project__section {
  max-width: 640px;
}

.project__section p,
.project__section li {
  color: var(--color-text-muted);
}

.project__section ul {
  display: grid;
  gap: 0.22rem;
  margin: 0;
}

.project__section[aria-labelledby$="-data-title"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.1rem var(--space-2);
  padding: 0;
  list-style: none;
}

.project__section[aria-labelledby$="-data-title"] li {
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--color-text);
  font-size: 0.8rem;
  line-height: 1.55;
  background: transparent;
}

.project__section[aria-labelledby$="-data-title"] li + li::before {
  margin-right: var(--space-2);
  color: var(--color-accent);
  content: "·";
}

.project__main,
.project__text,
.project__media,
.project__gallery {
  display: grid;
  gap: clamp(0.85rem, 1.4vw, 1.35rem);
}

.project__main,
.project__media,
.project__gallery {
  max-width: none;
}

.project__main--media-first .project__media {
  order: 2;
}

.project__main--media-first .project__text {
  order: 1;
}

.project__media .label-title {
  margin-bottom: 0;
}

.project__media figure {
  padding: var(--space-2);
}

.project__gallery figure {
  padding: clamp(0.5rem, 0.8vw, 0.75rem);
  border-color: rgba(42, 50, 57, 0.45);
  box-shadow: none;
}

.project__gallery img {
  max-height: clamp(320px, 34vw, 500px);
}

/* 10. Méthode */
.method__steps {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0;
  padding: 0;
  list-style: none;
  counter-reset: method;
}

.method__steps li {
  position: relative;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  counter-increment: method;
}

.method__steps li::before {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-accent-hover);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  content: "0" counter(method);
}

.method__steps .section-title {
  color: var(--color-text);
  font-size: 1rem;
}

.method__steps p {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
}

.method > p:first-of-type {
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: var(--color-surface-raised);
}

/* 11. Compétences */
.skills {
  display: grid;
  gap: var(--space-3);
}

.skills > .page-title {
  grid-column: 1 / -1;
}

.skills__group {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.skills__group .section-title {
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.skills__group ul {
  display: grid;
  gap: 0.45rem;
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

.skills__group li {
  color: var(--color-text-muted);
}

.skills__group li::before {
  color: var(--color-accent);
  content: "— ";
}

.skills__group:last-child li {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

/* 12. Parcours */
.career {
  display: grid;
  gap: var(--space-3);
}

.career__item {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.career__item p {
  margin-top: var(--space-2);
  color: var(--color-text-muted);
}

.career > p:last-child {
  margin-top: var(--space-3);
  padding: var(--space-4);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text);
  background: var(--color-surface-raised);
}

/* 13. Contact */
.contact {
  display: grid;
  gap: var(--space-4);
  align-items: start;
  padding-bottom: clamp(4.5rem, 8vw, 7rem);
}

.contact__primary {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.contact .page-title {
  max-width: 860px;
}

.contact__email {
  margin-top: 0;
}

.contact__email a {
  color: var(--color-accent-hover);
  font-weight: 760;
}

.contact__actions ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 780;
  text-decoration: none;
}

.contact__action--primary {
  border-color: var(--color-accent);
  color: #17100b;
  background: var(--color-accent);
}

.contact__action--primary:hover {
  color: #17100b;
  background: var(--color-accent-hover);
}

.contact__action--secondary {
  color: var(--color-text);
  background: transparent;
}

.contact__action--secondary:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.contact__help {
  max-width: 760px;
  padding: var(--space-3);
  border-left: 3px solid var(--color-accent);
  background: rgba(255, 255, 255, 0.025);
}

.contact__help ul {
  display: grid;
  gap: 0.35rem;
  margin: var(--space-2) 0 0;
  padding-left: 1rem;
  color: var(--color-text-muted);
}

/* 14. Footer */
.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
  border-top: 1px solid rgba(170, 178, 186, 0.14);
  color: var(--color-text-muted);
  background: #090b0d;
}

.site-footer p {
  margin: 0;
  font-size: 0.88rem;
}

/* 15. Responsive */
@media (max-width: 639px) {
  html {
    scroll-padding-top: 132px;
  }

  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding-top: var(--space-3);
    padding-bottom: var(--space-3);
  }

  .site-header__wordmark {
    display: none;
  }

  .site-nav__list {
    justify-content: flex-start;
  }

  .site-nav a {
    min-height: 34px;
    padding: 0.25rem 0.42rem;
    font-size: 0.82rem;
  }

  h1 {
    font-size: clamp(2.15rem, 1.6rem + 2vw, 2.75rem);
  }

  .hero__actions li,
  .hero__action,
  .contact__actions li,
  .contact__action {
    width: 100%;
  }

  .hero__actions ul,
  .contact__actions ul {
    flex-direction: column;
  }

  .hero__media,
  .proof-card__media,
  .project__media figure,
  .project__gallery figure {
    padding: 0.42rem;
  }
}

@media (min-width: 640px) {
  .services__list,
  .skills,
  .career {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .career > h2,
  .career > p:last-child {
    grid-column: 1 / -1;
  }

  .project__gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .project__gallery--single {
    grid-template-columns: 1fr;
  }

  #realisation-terrain .project__media {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #realisation-terrain .project__media .label-title {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(420px, 0.94fr);
  }

  .contact {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 0.4fr);
    column-gap: clamp(1.75rem, 3vw, 2.5rem);
  }

  .proofs__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  .proof-card:first-child {
    transform: translateY(-0.35rem);
  }

  .method__steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .method__steps li {
    padding: var(--space-3);
  }
}

@media (min-width: 1100px) {
  .project__main {
    grid-template-columns: minmax(0, 0.37fr) minmax(0, 0.63fr);
    align-items: start;
    gap: clamp(1.5rem, 2.4vw, 2.35rem);
  }

  .project__main--media-first {
    grid-template-columns: minmax(0, 0.64fr) minmax(0, 0.36fr);
  }

  .project__main--media-first .project__media {
    order: 1;
  }

  .project__main--media-first .project__text {
    order: 2;
  }

  .project__gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    width: 100%;
  }

  .project__gallery--single {
    grid-template-columns: minmax(0, 0.64fr);
  }
}

/* 16. Accessibilité / reduced motion */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

a:active {
  transform: translateY(1px);
}

.hero__action:hover,
.contact__action:hover,
.proof-card > a:hover,
.site-nav a:hover {
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* 17. Visionneuse d'image (dialog natif) */
.image-viewer {
  width: min(94vw, 1600px);
  max-width: min(94vw, 1600px);
  max-height: 94vh;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
  color: var(--color-text);
  box-shadow: var(--shadow-soft);
}

.image-viewer::backdrop {
  background: rgba(6, 9, 11, 0.82);
}

.image-viewer__shell {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-height: 94vh;
  padding: var(--space-3) var(--space-4) var(--space-4);
  overflow: auto;
}

.image-viewer__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.image-viewer__title {
  margin: 0;
  color: var(--color-text-subtle);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.image-viewer__close {
  flex: 0 0 auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.image-viewer__close:hover,
.image-viewer__close:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
}

.image-viewer__figure {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  min-height: 0;
  margin: 0;
}

.image-viewer__image {
  max-width: 100%;
  max-height: 78vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-xs);
  background: var(--color-paper-muted);
}

.image-viewer__caption {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  text-align: center;
}

.image-viewer__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.image-viewer__previous,
.image-viewer__next {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.image-viewer__previous:hover,
.image-viewer__next:hover,
.image-viewer__previous:focus-visible,
.image-viewer__next:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
}

.image-viewer__count {
  margin: 0;
  color: var(--color-text-subtle);
  font-size: 0.82rem;
}

@media (max-width: 639px) {
  .image-viewer {
    width: 96vw;
    max-width: 96vw;
    max-height: 96vh;
  }

  .image-viewer__shell {
    max-height: 96vh;
    padding: var(--space-2) var(--space-3) var(--space-3);
  }

  .image-viewer__image {
    max-height: 58vh;
  }

  .image-viewer__close,
  .image-viewer__previous,
  .image-viewer__next {
    min-height: 44px;
  }
}

/* 18. Page 404 */
.error-page {
  display: grid;
  gap: var(--space-3);
  max-width: var(--text-max);
  padding-top: clamp(3.5rem, 7vw, 6rem);
  padding-bottom: clamp(3.5rem, 7vw, 6rem);
  text-align: left;
}

.error-page__code {
  color: var(--color-accent-hover);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.error-page__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* 19. V2.1 — dynamique (scroll reveal, progression, nav rapide) */

/* Content only hides when JS confirms it can reveal it again (see
   setupScrollReveal in main.js): without the .js-reveal hook on <html>,
   .reveal elements stay perfectly visible, so JS-disabled visitors never
   lose content. */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 460ms ease,
    transform 460ms ease;
}

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

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

.reading-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0%;
  height: 3px;
  background: var(--color-accent);
  transition: width 120ms linear;
}

.project-nav {
  margin: var(--space-4) 0 clamp(1.75rem, 3vw, 2.5rem);
}

.project-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.project-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  text-decoration: none;
}

.project-nav a:hover,
.project-nav a:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-text);
  background: var(--color-accent-soft);
}

.image-viewer__image {
  transition: opacity 160ms ease;
}

.image-viewer__image--switching {
  opacity: 0.35;
}

/* Soft navigation (see main.js): internal link clicks fetch the destination
   and swap only <main>, the document itself is never unloaded, so there is
   no whole-body fade and no <main> opacity animation here. The new content
   is visible at full opacity from the very first frame. */

/* Visually hidden but still announced by screen readers — used for the
   soft-navigation live region in main.js. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link: off-screen until keyboard-focused, then revealed above the
   header so keyboard users can bypass the nav and reach <main> directly. */
.skip-link {
  position: absolute;
  top: -999px;
  left: var(--space-3);
  z-index: 100;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-raised);
  color: var(--color-text);
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus-visible {
  top: var(--space-2);
}