/**
 * FIXEO Blog Index V3 — blog-index-v3.css
 * Premium editorial design system for blog-index.html
 * Dark-first, mobile-first, no framework, no overrides to main.css
 * Version: 1.0 — 2026-07-11
 *
 * Scope: .bi-* namespace exclusively (bi = blog index)
 * Coexists with blog-v1.css / blog-v2.css without conflict
 */

/* ─────────────────────────────────────────────────────────────
   DESIGN TOKENS (local to this file)
   ───────────────────────────────────────────────────────────── */
:root {
  --bi-bg:            #0D0D1A;          /* page bg — matches --bg-dark */
  --bi-surface:       rgba(255,255,255,.042);
  --bi-surface-hover: rgba(255,255,255,.075);
  --bi-border:        rgba(255,255,255,.09);
  --bi-border-hover:  rgba(255,255,255,.18);
  --bi-brand:         #E1306C;          /* FIXEO primary */
  --bi-brand-2:       #833AB4;
  --bi-brand-grd:     linear-gradient(135deg, #E1306C 0%, #833AB4 100%);
  --bi-teal:          #20C997;          /* success / accent */
  --bi-text:          #F5F7FB;
  --bi-muted:         rgba(255,255,255,.50);
  --bi-subtle:        rgba(255,255,255,.30);
  --bi-radius-card:   16px;
  --bi-radius-pill:   999px;
  --bi-radius-img:    12px;
  --bi-img-ratio:     56.25%;           /* 16:9 = 9/16 */
  --bi-card-transition: transform .22s cubic-bezier(.4,0,.2,1),
                         border-color .22s ease,
                         box-shadow .22s ease;
  --bi-max-w:         1140px;
  --bi-gap:           20px;
  --bi-section-gap:   72px;
}


/* ─────────────────────────────────────────────────────────────
   PAGE WRAPPER
   ───────────────────────────────────────────────────────────── */
.bi-wrap {
  max-width: var(--bi-max-w);
  margin: 0 auto;
  padding: 0 20px 96px;
}


/* ─────────────────────────────────────────────────────────────
   PAGE HEADER
   ───────────────────────────────────────────────────────────── */
.bi-header {
  padding: 56px 0 40px;
  text-align: center;
}

.bi-header-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--bi-brand);
  background: rgba(225,48,108,.1);
  border: 1px solid rgba(225,48,108,.22);
  border-radius: var(--bi-radius-pill);
  padding: 4px 14px;
  margin-bottom: 18px;
}

.bi-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.18;
  margin: 0 0 12px;
  color: var(--bi-text);
  letter-spacing: -.02em;
}

.bi-header-sub {
  font-size: 1rem;
  color: var(--bi-muted);
  margin: 0 auto 28px;
  max-width: 520px;
  line-height: 1.65;
}


/* ─────────────────────────────────────────────────────────────
   CATEGORY NAVIGATION PILLS
   ───────────────────────────────────────────────────────────── */
.bi-cat-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 0;
}

.bi-cat-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 16px;
  border-radius: var(--bi-radius-pill);
  font-size: .8rem;
  font-weight: 600;
  background: var(--bi-surface);
  border: 1px solid var(--bi-border);
  color: var(--bi-muted);
  text-decoration: none;
  transition: background .18s, border-color .18s, color .18s;
  white-space: nowrap;
}

.bi-cat-pill:hover {
  background: rgba(225,48,108,.1);
  border-color: rgba(225,48,108,.35);
  color: var(--bi-text);
}


/* ─────────────────────────────────────────────────────────────
   FEATURED ARTICLE HERO
   ───────────────────────────────────────────────────────────── */
.bi-featured {
  margin: 48px 0 0;
}

.bi-featured-link {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  background: var(--bi-surface);
  border: 1px solid var(--bi-border);
  border-radius: 24px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: var(--bi-card-transition);
}

.bi-featured-link:hover {
  border-color: rgba(225,48,108,.38);
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
  transform: translateY(-2px);
}

.bi-featured-img {
  position: relative;
  overflow: hidden;
  min-height: 280px;
  max-height: 360px;
}

.bi-featured-img img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform .4s ease;
}

.bi-featured-link:hover .bi-featured-img img {
  transform: scale(1.03);
}

.bi-featured-body {
  padding: 36px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.bi-featured-eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.bi-featured-cat {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .09em;
  color: var(--bi-brand);
}

.bi-featured-rt {
  font-size: .72rem;
  color: var(--bi-subtle);
}

.bi-featured-body h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.7rem);
  font-weight: 800;
  line-height: 1.25;
  margin: 0;
  color: var(--bi-text);
  letter-spacing: -.015em;
}

.bi-featured-desc {
  font-size: .9rem;
  color: var(--bi-muted);
  line-height: 1.65;
  margin: 0;
}

.bi-featured-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .85rem;
  font-weight: 700;
  color: var(--bi-brand);
  margin-top: 4px;
  transition: gap .18s ease;
}

.bi-featured-link:hover .bi-featured-arrow {
  gap: 10px;
}

@media (max-width: 860px) {
  .bi-featured-link {
    grid-template-columns: 1fr;
  }
  .bi-featured-img {
    min-height: 220px;
    max-height: 240px;
  }
  .bi-featured-body {
    padding: 24px 24px;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .bi-featured-img {
    min-height: 180px;
    max-height: 200px;
  }
  .bi-featured-body {
    padding: 20px 18px;
    gap: 8px;
  }
  .bi-featured-body h2 {
    font-size: 1.2rem;
  }
}


/* ─────────────────────────────────────────────────────────────
   CATEGORY SECTION
   ───────────────────────────────────────────────────────────── */
.bi-section {
  margin-top: var(--bi-section-gap);
}

.bi-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
}

.bi-section-head h2 {
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0;
  color: var(--bi-text);
  letter-spacing: -.01em;
}

.bi-section-count {
  font-size: .75rem;
  color: var(--bi-subtle);
  white-space: nowrap;
  flex-shrink: 0;
}

.bi-section-divider {
  height: 1px;
  background: var(--bi-border);
  margin: 12px 0 24px;
}

.bi-section-desc {
  font-size: .83rem;
  color: var(--bi-muted);
  margin: 0 0 24px;
  line-height: 1.6;
}

/* Large category sections: show first 6 visible, rest collapsed */
.bi-section-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--bi-gap);
}

/* "show more" toggle — pure CSS + HTML details/summary */
.bi-more-wrap {
  margin-top: 20px;
}

.bi-more-toggle {
  display: none; /* only shown when section has > threshold cards */
}

.bi-cards-overflow {
  /* cards beyond the initial set — always in DOM for SEO */
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--bi-gap);
  margin-top: var(--bi-gap);
}

/* progressive disclosure with <details> — no JS needed, SEO-safe */
.bi-disclosure {
  margin-top: var(--bi-gap);
}

.bi-disclosure summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  font-weight: 700;
  color: var(--bi-muted);
  padding: 8px 16px;
  border: 1px solid var(--bi-border);
  border-radius: var(--bi-radius-pill);
  transition: border-color .18s, color .18s, background .18s;
  user-select: none;
}

.bi-disclosure summary::-webkit-details-marker { display: none; }

.bi-disclosure summary::after {
  content: '↓';
  font-size: .8rem;
  transition: transform .22s ease;
}

.bi-disclosure[open] summary::after {
  transform: rotate(180deg);
}

.bi-disclosure summary:hover {
  border-color: var(--bi-border-hover);
  color: var(--bi-text);
  background: var(--bi-surface);
}

.bi-disclosure-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--bi-gap);
  margin-top: var(--bi-gap);
  padding-top: 4px;
}

@media (max-width: 900px) {
  .bi-section-grid,
  .bi-disclosure-grid,
  .bi-cards-overflow {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 540px) {
  .bi-section-grid,
  .bi-disclosure-grid,
  .bi-cards-overflow {
    grid-template-columns: 1fr;
  }
}


/* ─────────────────────────────────────────────────────────────
   ARTICLE CARD
   ───────────────────────────────────────────────────────────── */
.bi-card {
  background: var(--bi-surface);
  border: 1px solid var(--bi-border);
  border-radius: var(--bi-radius-card);
  overflow: hidden;
  transition: var(--bi-card-transition);
  display: flex;
  flex-direction: column;
}

.bi-card:hover {
  border-color: var(--bi-border-hover);
  background: var(--bi-surface-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,.3);
}

.bi-card-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Image container — locked 16:9 ratio */
.bi-card-img-wrap {
  position: relative;
  width: 100%;
  padding-bottom: var(--bi-img-ratio);  /* 56.25% = 16:9 */
  overflow: hidden;
  border-radius: var(--bi-radius-img) var(--bi-radius-img) 0 0;
  flex-shrink: 0;
}

.bi-card-img-wrap img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform .3s ease;
}

.bi-card:hover .bi-card-img-wrap img {
  transform: scale(1.04);
}

/* Card body */
.bi-card-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.bi-card-badge {
  font-size: .67rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--bi-brand);
  display: block;
}

.bi-card-title {
  font-size: .92rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--bi-text);
  margin: 0;
  /* 2-line clamp for visual consistency */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.bi-card-excerpt {
  font-size: .78rem;
  color: var(--bi-muted);
  line-height: 1.55;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Footer row */
.bi-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--bi-border);
}

.bi-card-time {
  font-size: .7rem;
  color: var(--bi-subtle);
}

.bi-card-rt {
  font-size: .7rem;
  color: var(--bi-subtle);
  display: flex;
  align-items: center;
  gap: 3px;
}

.bi-card-arrow {
  font-size: .75rem;
  color: var(--bi-subtle);
  transition: color .18s, transform .18s;
}

.bi-card:hover .bi-card-arrow {
  color: var(--bi-brand);
  transform: translateX(3px);
}


/* ─────────────────────────────────────────────────────────────
   SMALL SECTIONS (≤ 6 cards) — horizontal list layout variant
   Used for: Tarifs, Urgences, Confiance, Guides (5–6 cards each)
   ───────────────────────────────────────────────────────────── */
.bi-section-grid--small {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 900px) {
  .bi-section-grid--small {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 540px) {
  .bi-section-grid--small {
    grid-template-columns: 1fr;
  }
}


/* ─────────────────────────────────────────────────────────────
   LARGE SECTIONS (25 cards) — initial 6 visible, 19 in <details>
   ───────────────────────────────────────────────────────────── */


/* ─────────────────────────────────────────────────────────────
   SECTION SEPARATOR ACCENT
   ───────────────────────────────────────────────────────────── */
.bi-section-accent {
  display: inline-block;
  width: 28px;
  height: 3px;
  background: var(--bi-brand-grd);
  border-radius: 2px;
  margin-bottom: 16px;
}


/* ─────────────────────────────────────────────────────────────
   PAGE-LEVEL RESPONSIVE ADJUSTMENTS
   ───────────────────────────────────────────────────────────── */
@media (max-width: 680px) {
  :root {
    --bi-section-gap: 52px;
    --bi-gap: 14px;
  }
  .bi-header {
    padding: 36px 0 28px;
  }
  .bi-header h1 {
    font-size: 1.65rem;
  }
  .bi-section-head h2 {
    font-size: 1.05rem;
  }
  .bi-cat-pill {
    font-size: .75rem;
    padding: 6px 13px;
  }
}

@media (max-width: 375px) {
  .bi-wrap {
    padding: 0 14px 72px;
  }
  .bi-cat-nav {
    gap: 6px;
  }
  .bi-cat-pill {
    padding: 5px 11px;
    font-size: .72rem;
  }
  .bi-card-body {
    padding: 13px 14px 15px;
  }
}


/* ─────────────────────────────────────────────────────────────
   HORIZONTAL SCROLL FOR PILLS ON MOBILE (optional, no overflow)
   ───────────────────────────────────────────────────────────── */
@media (max-width: 540px) {
  .bi-cat-nav {
    /* allow wrapping but ensure no horizontal scroll */
    justify-content: flex-start;
    overflow-x: visible;
    padding-bottom: 4px;
  }
}