/* ==========================================================================
   BURKINABÈ — dossier « Lettre aux Burkinabè » (hors série, octobre 2020)
   Complète style.css. Aucune dépendance externe.
   ========================================================================== */

/* En-tête du dossier ------------------------------------------------------- */
.letter-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
  padding-block: 2.4rem 3rem;
  border-bottom: 1px solid var(--ink);
}

.letter-hero__cover {
  margin: 0;
  padding: .55rem;
  background: var(--paper-3);
  border: 1px solid var(--rule);
  box-shadow: 0 18px 40px -30px rgba(21, 18, 15, .45);
}
.letter-hero__cover img { width: 100%; height: auto; }

.letter-hero__logo {
  width: min(320px, 78%);
  height: auto;
  margin-bottom: 1.1rem;
}
.letter-hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4.8vw, 3.6rem);
  line-height: 1.02;
  letter-spacing: -.028em;
  margin-block: .35rem .8rem;
  text-wrap: balance;
}
.letter-hero__standfirst {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 58ch;
}
.letter-hero__text {
  margin-top: .9rem;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 62ch;
}

.letter-actions { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.25rem; }
.letter-actions .btn { gap: .45rem; }
.letter-actions svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.letter-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .65rem 1.2rem;
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
}
.letter-facts div { display: flex; align-items: baseline; gap: .45rem; }
.letter-facts dt {
  font-size: .6rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.letter-facts dd {
  margin: 0;
  font-family: var(--serif);
  font-size: .98rem;
  color: var(--ink);
}

/* Sommaire ---------------------------------------------------------------- */
.letter-toc {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  padding-block: 1rem;
  border-bottom: 1px solid var(--rule);
}
.letter-toc a {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .3rem .55rem;
  border: 1px solid var(--rule);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.letter-toc a:hover { border-color: var(--red); color: var(--red); }

/* Index des articles ------------------------------------------------------ */
.letter-index { padding-block: 2.6rem 1rem; }
.letter-section { padding-block: 1.8rem 2.4rem; border-top: 1px solid var(--ink); }
.letter-section:first-child { border-top: 0; padding-top: .4rem; }
.letter-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem 1rem;
}
.letter-section__title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.8vw, 2.1rem);
  letter-spacing: -.02em;
}
.letter-section__count { font-size: .66rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.letter-section__desc { margin-top: .3rem; font-size: .82rem; color: var(--ink-3); max-width: 70ch; }

.letter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem 1.6rem;
  margin-top: 1.25rem;
}

.letter-card {
  display: flex;
  flex-direction: column;
  border-top: 2px solid var(--ink);
  padding-top: .8rem;
  min-width: 0;
}
.letter-card__media {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--paper-2);
  border: 1px solid var(--rule);
}
.letter-card__kicker {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem .6rem;
  margin-top: .7rem;
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--red);
}
.letter-card__kicker span:last-child { color: var(--ink-3); letter-spacing: .06em; }
.letter-card h3 {
  font-family: var(--serif);
  font-size: 1.16rem;
  line-height: 1.22;
  letter-spacing: -.012em;
  margin: .4rem 0 .5rem;
}
.letter-card h3 a:hover { color: var(--red); }
.letter-card p {
  font-size: .8rem;
  line-height: 1.55;
  color: var(--ink-2);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.letter-card__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .3rem .7rem;
  margin-top: auto;
  padding-top: .65rem;
  border-top: 1px solid var(--rule);
  font-size: .62rem;
  letter-spacing: .05em;
  color: var(--ink-3);
  text-transform: uppercase;
}

.letter-card--lead {
  grid-column: span 2;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 1.1rem 1.25rem;
  border-top: 3px solid var(--red);
  padding-top: 0;
}
.letter-card--lead .letter-card__media { aspect-ratio: 16 / 10; height: 100%; }
.letter-card--lead .letter-card__body { display: flex; flex-direction: column; padding-top: .75rem; min-width: 0; }
.letter-card--lead h3 { font-size: clamp(1.35rem, 2.4vw, 1.9rem); }
.letter-card--lead p { -webkit-line-clamp: 4; font-size: .84rem; }

/* Feuilleter -------------------------------------------------------------- */
.letter-reader {
  padding-block: 2.4rem 2.8rem;
  background: var(--paper-2);
  border-block: 1px solid var(--rule);
}
.letter-reader__head {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: .8rem 1.5rem;
}
.letter-reader__head h2 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: -.02em;
}
.letter-reader__head p { font-size: .82rem; color: var(--ink-3); max-width: 58ch; margin-top: .35rem; }

.letter-pages {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: .55rem;
  margin-top: 1.2rem;
}
.letter-page {
  display: block;
  padding: 3px;
  background: var(--paper-3);
  border: 1px solid var(--rule);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}
.letter-page:hover { border-color: var(--red); transform: translateY(-2px); }
.letter-page img { width: 100%; aspect-ratio: .707; object-fit: cover; }
.letter-page span {
  display: block;
  padding: .2rem 0 .15rem;
  text-align: center;
  font-size: .6rem;
  letter-spacing: .06em;
  color: var(--ink-3);
}

/* Colophon ---------------------------------------------------------------- */
.letter-colophon { padding-block: 2.5rem 3rem; border-top: 3px solid var(--ink); }
.letter-colophon__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: 2rem 2.5rem;
  align-items: start;
}
.letter-colophon h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.5vw, 1.9rem);
  margin-bottom: .7rem;
}
.letter-colophon p { font-size: .84rem; line-height: 1.65; color: var(--ink-2); max-width: 62ch; }
.letter-colophon p + p { margin-top: .6rem; }
.letter-colophon__marks { display: flex; align-items: flex-end; gap: 1rem; margin-bottom: 1rem; }
.letter-colophon__marks img:first-child { width: min(260px, 62%); height: auto; }
.letter-colophon__marks img:last-child { width: 76px; height: auto; border: 1px solid var(--rule); }
.letter-team { margin: 1rem 0 0; display: grid; gap: .55rem; }
.letter-team div { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: .7rem; padding-bottom: .5rem; border-bottom: 1px solid var(--rule); }
.letter-team dt { font-size: .58rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.letter-team dd { margin: 0; font-size: .8rem; line-height: 1.45; color: var(--ink-2); }
.letter-colophon__file { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: .5rem; }

/* Article du dossier ------------------------------------------------------ */
.letter-note {
  margin: 0 0 1.4rem;
  padding: .7rem .9rem;
  border-left: 3px solid var(--gold);
  background: rgba(233, 185, 26, .08);
  font-family: var(--sans);
  font-size: .76rem;
  line-height: 1.55;
  color: var(--ink-2);
}
.letter-note a { color: var(--green); text-decoration: underline; text-underline-offset: .12em; }

.article-figure img { width: 100%; height: auto; border: 1px solid var(--rule); }

.letter-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--ink);
}
.letter-gallery figure { margin: 0; min-width: 0; }
.letter-gallery img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border: 1px solid var(--rule); }
.letter-gallery figcaption { margin-top: .35rem; font-family: var(--sans); font-size: .64rem; line-height: 1.45; color: var(--ink-3); }

.letter-signature {
  margin-top: 1.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: .82rem;
  line-height: 1.5;
  color: var(--ink-2);
}
.letter-signature strong { display: block; color: var(--ink); }

.letter-source-pages {
  display: flex;
  gap: .4rem;
  overflow-x: auto;
  padding: .15rem 0 .45rem;
  margin-top: .35rem;
  scrollbar-width: thin;
}
.letter-source-pages a { flex: 0 0 56px; border: 1px solid var(--rule); background: var(--paper-3); padding: 2px; }
.letter-source-pages img { width: 100%; aspect-ratio: .707; object-fit: cover; }
.letter-source-pages a:hover { border-color: var(--red); }

.letter-source-label { margin-top: .85rem; }
.letter-aside-nav { display: grid; gap: .5rem; margin-top: .55rem; }
.letter-aside-nav a { display: flex; justify-content: space-between; gap: .6rem; font-size: .78rem; color: var(--ink-2); padding-bottom: .45rem; border-bottom: 1px solid var(--rule); }
.letter-aside-nav a:hover { color: var(--red); }
.letter-aside-nav span { color: var(--ink-3); text-align: right; }

/* Visionneuse ------------------------------------------------------------- */
.viewer {
  width: min(96vw, 1020px);
  max-width: 1020px;
  max-height: 94vh;
  padding: 0;
  border: 0;
  background: #12100e;
  color: #f7f3eb;
}
.viewer::backdrop { background: rgba(10, 8, 6, .88); }
.viewer__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .7rem .9rem;
  border-bottom: 1px solid rgba(255, 255, 255, .18);
}
.viewer__bar p { font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: #d9d2c5; }
.viewer__bar button {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .35);
  color: #fff;
  padding: .42rem .7rem;
  font-size: .68rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.viewer__bar button:hover { background: #fff; color: #12100e; }
.viewer__stage {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 46px;
  align-items: center;
  gap: .4rem;
  padding: .6rem;
}
.viewer__stage img { width: 100%; max-height: calc(94vh - 120px); object-fit: contain; background: #211e1a; }
.viewer__nav {
  width: 42px;
  height: 64px;
  border: 1px solid rgba(255, 255, 255, .3);
  background: rgba(255, 255, 255, .06);
  color: #fff;
  font-size: 1.3rem;
  line-height: 1;
}
.viewer__nav:hover { background: #fff; color: #12100e; }
.viewer__nav:disabled { opacity: .3; cursor: default; }

@media (max-width: 1040px) {
  .letter-hero { grid-template-columns: 1fr; }
  .letter-hero__cover { max-width: 560px; }
  .letter-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .letter-card--lead { grid-column: span 2; }
  .letter-colophon__grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .letter-grid { grid-template-columns: 1fr; }
  .letter-card--lead { grid-column: auto; display: flex; gap: 0; }
  .letter-card--lead .letter-card__media { height: auto; aspect-ratio: 16 / 10; }
  .letter-card--lead .letter-card__body { padding-top: .7rem; }
  .letter-gallery { grid-template-columns: 1fr; }
  .letter-facts { grid-template-columns: 1fr; }
  .letter-team div { grid-template-columns: 1fr; gap: .1rem; }
  .letter-pages { grid-template-columns: repeat(auto-fill, minmax(72px, 1fr)); }
  .viewer__stage { grid-template-columns: 36px minmax(0, 1fr) 36px; padding: .35rem; }
  .viewer__nav { width: 32px; height: 52px; }
}