/* =========================================================
   BivouacLab — PrestAI Design System Preview
   Standalone preview based on Hummingbird / Bootstrap 5.3 logic
   Source de vérité future : custom.css du thème enfant
   ========================================================= */

/* 1. Tokens */
:root {
  --pa-color-ink: #061A33;
  --pa-color-navy: #0B2D55;
  --pa-color-glacier: #F3F6F4;
  --pa-color-snow: #FFFFFF;
  --pa-color-stone: #D8D0C4;
  --pa-color-slate: #40505C;
  --pa-color-muted: #6C7882;
  --pa-color-moss: #5E6F54;
  --pa-color-ember: #C45A32;
  --pa-color-border: #DDE3E2;
  --pa-color-soft: #F8FAF8;

  --pa-font-body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --pa-font-title: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --pa-container: 1680px;
  --pa-gutter: clamp(1rem, 3vw, 2rem);
  --pa-section-y: clamp(4rem, 7vw, 7rem);
  --pa-section-y-compact: clamp(3rem, 5vw, 5rem);

  --pa-radius-sm: 0.75rem;
  --pa-radius-md: 1rem;
  --pa-radius-lg: 1.5rem;
  --pa-radius-xl: 2rem;
  --pa-radius-pill: 999px;

  --pa-shadow-soft: 0 18px 50px rgba(6, 26, 51, 0.08);
  --pa-shadow-card: 0 18px 40px rgba(6, 26, 51, 0.10);
  --pa-transition: 180ms ease;
}

/* 2. Base preview */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--pa-font-body);
  color: var(--pa-color-ink);
  background: var(--pa-color-snow);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

.preview-topbar {
  position: relative;
  z-index: 60;
  padding: 0.55rem 1rem 0.45rem;
  background: #1e334e;
  color: rgba(255,255,255,.86);
  text-align: center;
  font-size: .7rem;
  letter-spacing: .035em;
}

/* 3. Header preview */
.pa-site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(11,45,85,.08);
}

.pa-site-header__inner {
  min-height: 88px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
}

.pa-site-brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
}

.pa-site-brand img {
  width: min(180px, 48vw);
  height: auto;
}

.pa-site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
  color: var(--pa-color-slate);
  font-size: .95rem;
  font-weight: 600;
  justify-self: center;
}

.pa-site-nav a {
  transition: color var(--pa-transition);
}

.pa-site-nav a:hover {
  color: var(--pa-color-navy);
}

.pa-site-actions {
  display: flex;
  gap: .75rem;
  align-items: center;
  justify-self: end;
}

/* 4. Layout */
.pa-container {
  width: min(var(--pa-container), calc(100% - (var(--pa-gutter) * 2)));
  margin-inline: auto;
}

.pa-section {
  padding-block: var(--pa-section-y);
}

.pa-section--compact {
  padding-block: var(--pa-section-y-compact);
}

.pa-section--glacier {
  background: var(--pa-color-glacier);
}

.pa-section--dark {
  color: var(--pa-color-snow);
  background:
    radial-gradient(circle at 85% 10%, rgba(196,90,50,.18), transparent 28rem),
    linear-gradient(180deg, #0b284b 0%, #061a33 100%);
}

.pa-section__head {
  max-width: 790px;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

.pa-section__head--split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, .8fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
}

.pa-grid-2,
.pa-grid-3,
.pa-grid-4 {
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
}

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

.pa-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.pa-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* 5. Typography */
.pa-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  margin: 0 0 1rem;
  color: var(--pa-color-ember);
  font-size: .78rem;
  line-height: 1;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.pa-eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 1px;
  background: currentColor;
}

.pa-title {
  margin: 0;
  font-family: var(--pa-font-title);
  font-size: clamp(2rem, 3.5vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: -.045em;
  color: inherit;
}

.pa-title--xl {
  font-size: clamp(2.75rem, 6vw, 5.35rem);
  line-height: .98;
  letter-spacing: -.06em;
}

.pa-subtitle {
  margin: 1.35rem 0 0;
  max-width: 720px;
  color: rgba(255,255,255,.84);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.55;
}

.pa-text {
  margin: 1rem 0 0;
  color: var(--pa-color-muted);
  font-size: 1.05rem;
}

.pa-section--dark .pa-text {
  color: rgba(255,255,255,.76);
}

/* 6. Buttons / links */
.pa-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2rem;
}

.pa-button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .85rem 1.35rem;
  border-radius: var(--pa-radius-pill);
  background: var(--pa-color-ember);
  color: var(--pa-color-snow);
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 16px 32px rgba(196, 90, 50, .24);
  transition: transform var(--pa-transition), box-shadow var(--pa-transition), background var(--pa-transition);
}

.pa-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 38px rgba(196, 90, 50, .30);
}

.pa-button--secondary {
  background: rgba(255,255,255,.12);
  color: var(--pa-color-snow);
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: none;
}

.pa-button--dark-secondary {
  color: var(--pa-color-ink);
  background: var(--pa-color-snow);
  border: 0;
}

.pa-button--ghost {
  color: var(--pa-color-navy);
  background: transparent;
  border: 1px solid rgba(11,45,85,.18);
  box-shadow: none;
}

.pa-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-top: 1rem;
  color: var(--pa-color-navy);
  font-weight: 800;
}

.pa-link-arrow::after {
  content: "→";
  transform: translateY(-1px);
  transition: transform var(--pa-transition);
}

.pa-link-arrow:hover::after {
  transform: translate(3px, -1px);
}

/* 7. Cards */
.pa-card,
.pa-category-tile,
.pa-guide-card,
.pa-lab-panel,
.pa-use-case,
.pa-reassurance-item {
  border: 1px solid rgba(11,45,85,.09);
  border-radius: var(--pa-radius-lg);
  background: var(--pa-color-snow);
  box-shadow: var(--pa-shadow-soft);
  overflow: hidden;
}

.pa-card,
.pa-guide-card,
.pa-category-tile {
  transition: transform var(--pa-transition), box-shadow var(--pa-transition), border-color var(--pa-transition);
}

.pa-card:hover,
.pa-guide-card:hover,
.pa-category-tile:hover {
  transform: translateY(-4px);
  box-shadow: var(--pa-shadow-card);
  border-color: rgba(11,45,85,.16);
}

.pa-card__media,
.pa-category-tile__media,
.pa-guide-card__media {
  position: relative;
  overflow: hidden;
  background: var(--pa-color-glacier);
}

.pa-card__media img,
.pa-category-tile__media img,
.pa-guide-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 420ms ease;
}

.pa-card:hover img,
.pa-category-tile:hover img,
.pa-guide-card:hover img {
  transform: scale(1.035);
}

.pa-card__body,
.pa-category-tile__body,
.pa-guide-card__body {
  padding: clamp(1.25rem, 2vw, 1.6rem);
}

.pa-card__body h3,
.pa-category-tile__body h3,
.pa-guide-card__body h3,
.pa-reassurance-item h3,
.pa-use-case h3 {
  margin: 0;
  color: var(--pa-color-ink);
  font-size: clamp(1.15rem, 1.6vw, 1.45rem);
  line-height: 1.1;
  letter-spacing: -.035em;
}

.pa-card__body p,
.pa-category-tile__body p,
.pa-guide-card__body p,
.pa-reassurance-item p,
.pa-use-case p {
  margin: .75rem 0;
  color: var(--pa-color-muted);
}

.pa-category-tile__media {
  aspect-ratio: 4 / 5;
}

.pa-guide-card__media,
.pa-card__media {
  aspect-ratio: 4 / 3;
}

/* 8. Product preview cards */
.pa-card--product {
  display: flex;
  flex-direction: column;
}

.pa-card--product .pa-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.pa-product-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.pa-product-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-top: auto;
  padding-top: 1.15rem;
  border-top: 1px solid var(--pa-color-border);
}

.pa-product-price {
  font-weight: 900;
  color: var(--pa-color-ink);
}

/* 9. Badges */
.pa-badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  justify-content: center;
  padding: .45rem .7rem;
  border-radius: var(--pa-radius-pill);
  background: rgba(11,45,85,.08);
  color: var(--pa-color-navy);
  font-size: .72rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 1rem;
}

.pa-badge--lab {
  background: rgba(11,45,85,.12);
}

.pa-badge--expert {
  background: rgba(196,90,50,.14);
  color: #974526;
}

.pa-badge--light {
  background: rgba(94,111,84,.14);
  color: #46563e;
}

/* 10. Hero */
.pa-hero {
  position: relative;
  min-height: clamp(640px, 82vh, 920px);
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--pa-color-snow);
  background-size: cover;
  background-position: center;
}

.pa-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 34%;
  background: linear-gradient(0deg, rgba(6,26,51,.55), transparent);
  pointer-events: none;
}

.pa-hero .pa-container {
  position: relative;
  z-index: 2;
}

.pa-hero__content {
  max-width: 790px;
  padding-block: clamp(5rem, 10vw, 8rem);
}

.pa-hero .pa-eyebrow {
  color: rgba(255,255,255,.82);
}

.pa-hero .pa-eyebrow::before {
  background: rgba(255,255,255,.6);
}

.pa-hero__proofs {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.65rem;
}

.pa-hero__proofs span {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .62rem .8rem;
  border-radius: var(--pa-radius-pill);
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.16);
  color: rgba(255,255,255,.86);
  font-size: .9rem;
}

.pa-hero__proofs span::before {
  content: "";
  width: .42rem;
  height: .42rem;
  border-radius: 999px;
  background: #9EC184;
}

/* 11. Lab / expert components */
.pa-lab-panel {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem);
  color: var(--pa-color-snow);
  background:
    linear-gradient(135deg, rgba(255,255,255,.10), rgba(255,255,255,.035));
  border-color: rgba(255,255,255,.12);
  box-shadow: none;
}

.pa-lab-panel > * {
  position: relative;
  z-index: 2;
}

.pa-lab-panel .pa-title {
  max-width: 760px;
}

.pa-use-case {
  padding: 1.35rem;
  color: var(--pa-color-snow);
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.10);
  box-shadow: none;
}

.pa-use-case h3 {
  color: var(--pa-color-snow);
  font-size: 1.15rem;
}

.pa-use-case p {
  color: rgba(255,255,255,.74);
  font-size: .98rem;
}

/* 12. CTA / reassurance */
.pa-cta-band {
  color: var(--pa-color-snow);
  background:
    linear-gradient(120deg, rgba(6,26,51,.94), rgba(11,45,85,.84)),
    url("assets/hero-alpine.jpg") center / cover no-repeat;
}

.pa-cta-band__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) auto;
  gap: 2rem;
  align-items: center;
}

.pa-cta-band .pa-title {
  max-width: 900px;
}

.pa-reassurance {
  background: var(--pa-color-snow);
}

.pa-reassurance-item {
  padding: 1.35rem;
  box-shadow: none;
}

.pa-reassurance-item h3 {
  font-size: 1.05rem;
}

.pa-reassurance-item p {
  font-size: .94rem;
}

/* 13. Responsive global */
@media (max-width: 1199.98px) {
  .pa-grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pa-grid-3,
  .pa-section__head--split,
  .pa-cta-band__inner {
    grid-template-columns: 1fr;
  }

  .pa-cta-band__inner .pa-actions {
    margin-top: 0;
  }
}

@media (max-width: 991.98px) {
  .pa-site-nav {
    display: none;
  }

  .pa-site-header__inner {
    min-height: 74px;
  }

  .pa-site-brand img {
    width: min(210px, 58vw);
  }

  .pa-hero {
    min-height: 720px;
    background-position: 62% center;
  }
}

@media (max-width: 767.98px) {
  :root {
    --pa-gutter: .85rem;
  }

  .preview-topbar {
    font-size: .76rem;
  }

  .pa-section {
    padding-block: 4rem;
  }

  .pa-grid-2,
  .pa-grid-3,
  .pa-grid-4 {
    grid-template-columns: 1fr;
  }

  .pa-hero {
    min-height: 660px;
    align-items: flex-end;
    background-position: 70% center;
  }

  .pa-hero__content {
    padding-block: 4.5rem;
  }

  .pa-title--xl {
    font-size: clamp(2.5rem, 13vw, 3.55rem);
  }

  .pa-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .pa-button {
    width: 100%;
  }

  .pa-hero__proofs span {
    font-size: .82rem;
  }

  .pa-product-row {
    align-items: flex-start;
    flex-direction: column;
  }
}