/* ============================================================
   Kalvi — Landing Page
   Direction : éditorial luxe italien, marbre blanc cassé, accent bordeaux
   ============================================================ */

:root {
  --bg: #F4F0E9;
  --bg-2: #EFE9DF;
  --ink: #1A1614;
  --ink-soft: #4A4340;
  --ink-mute: #7C736E;
  --line: rgba(26, 22, 20, 0.14);
  --line-soft: rgba(26, 22, 20, 0.08);
  --accent: #7A0E1F;
  --accent-2: #A01828;
  --accent-soft: rgba(122, 14, 31, 0.08);
  --cream: #FAF6EF;

  --ff-serif: "Cormorant Garamond", "Cormorant", "EB Garamond", Garamond, serif;
  --ff-sans: "Manrope", "Söhne", -apple-system, BlinkMacSystemFont, "Inter", system-ui, sans-serif;
  --ff-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--ff-sans);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ------- Marble background ------- */
.marble {
  position: relative;
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 140% 50% at 20% 0%, rgba(255,255,255,0.55), transparent 60%),
    radial-gradient(ellipse 80% 35% at 80% 30%, rgba(180,160,140,0.07), transparent 70%),
    radial-gradient(ellipse 100% 40% at 50% 80%, rgba(120,90,70,0.05), transparent 70%),
    radial-gradient(ellipse 60% 30% at 10% 100%, rgba(255,255,255,0.4), transparent 70%);
}
.marble::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='600' height='600'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.012' numOctaves='2' seed='4'/><feColorMatrix values='0 0 0 0 0.1  0 0 0 0 0.07  0 0 0 0 0.05  0 0 0 0.18 0'/></filter><rect width='600' height='600' filter='url(%23n)'/></svg>");
  mix-blend-mode: multiply;
}
.marble::after {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='1200' height='1200'><filter id='g'><feTurbulence type='turbulence' baseFrequency='0.6' numOctaves='2' seed='8'/><feColorMatrix values='0 0 0 0 0.6  0 0 0 0 0.55  0 0 0 0 0.5  0 0 0 0.05 0'/></filter><rect width='1200' height='1200' filter='url(%23g)'/></svg>");
  mix-blend-mode: multiply;
}

/* very subtle veining via diagonal lines */
.marble-veins {
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background:
    linear-gradient(115deg, transparent 38%, rgba(120,100,90,0.04) 39%, transparent 40%),
    linear-gradient(105deg, transparent 62%, rgba(140,120,100,0.05) 63%, transparent 64%),
    linear-gradient(125deg, transparent 18%, rgba(120,100,90,0.03) 19%, transparent 20%);
}

/* ------- Typography ------- */
.serif { font-family: var(--ff-serif); font-weight: 400; letter-spacing: -0.01em; }
.serif-italic { font-family: var(--ff-serif); font-style: italic; font-weight: 400; }
.sans { font-family: var(--ff-sans); }
.mono { font-family: var(--ff-mono); letter-spacing: 0; }

.eyebrow {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 500;
}
.eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  margin-right: 10px;
  vertical-align: middle;
  transform: translateY(-1px);
}

/* ------- Buttons ------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  font-family: var(--ff-sans);
  font-size: 14px;
  letter-spacing: 0.02em;
  border-radius: 999px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  font-weight: 500;
}
.btn:hover { background: var(--accent); border-color: var(--accent); }
.btn--accent { background: var(--accent); border-color: var(--accent); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--cream); }
.btn .arrow { transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ------- Underline link ------- */
.ulink {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: border-color 0.2s ease;
}
.ulink:hover { border-color: var(--accent); }

/* ------- Section wrapper ------- */
.section { position: relative; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 64px; }
.divider { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* ------- Nav ------- */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 32px 64px;
  position: relative;
  z-index: 5;
}
.nav-logo {
  font-family: var(--ff-serif);
  font-size: 28px;
  letter-spacing: 0.02em;
  font-weight: 500;
}
.nav-logo .dot { color: var(--accent); }
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a {
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav-links a:hover { color: var(--accent); }

/* ------- Cards ------- */
.card-marble {
  background: linear-gradient(180deg, rgba(255,255,255,0.45), rgba(255,255,255,0.15));
  border: 1px solid var(--line-soft);
  backdrop-filter: blur(4px);
  border-radius: 4px;
}

/* ------- Misc ------- */
.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-family: var(--ff-mono);
  background: rgba(255,255,255,0.4);
}

.rule-red {
  display: inline-block;
  width: 40px; height: 1px;
  background: var(--accent);
  vertical-align: middle;
}

/* ------- FAQ ------- */
details.faq-item {
  border-top: 1px solid var(--line);
  padding: 28px 0;
}
details.faq-item[open] summary .plus { transform: rotate(45deg); }
details.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item .q {
  font-family: var(--ff-serif);
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ink);
}
details.faq-item .plus {
  width: 18px; height: 18px;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}
details.faq-item .plus::before,
details.faq-item .plus::after {
  content: ""; position: absolute;
  background: var(--accent);
}
details.faq-item .plus::before { left: 0; right: 0; top: 50%; height: 1px; transform: translateY(-50%); }
details.faq-item .plus::after { top: 0; bottom: 0; left: 50%; width: 1px; transform: translateX(-50%); }
details.faq-item .a {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
  max-width: 720px;
}

/* ============================================================
   RESPONSIVE — Tablet & Mobile
   Overrides inline pixel sizes for landing page (index.html)
   and Merci page (merci.html). Uses !important to win over
   inline style attributes used in the React components.
   ============================================================ */

/* --- Tablet (≤ 1024px) --- */
@media (max-width: 1024px) {
  .container { padding: 0 32px !important; }
  .nav { padding: 24px 32px !important; }
  .section > div { padding-left: 32px !important; padding-right: 32px !important; }
}

/* --- Mobile (≤ 760px) --- */
@media (max-width: 760px) {
  /* Sections : tighter vertical + horizontal padding */
  .section.marble { padding-bottom: 56px !important; }
  .section > div {
    padding-left: 20px !important;
    padding-right: 20px !important;
  }

  /* HERO landing — title */
  .section.marble h1 {
    font-size: 38px !important;
    line-height: 1.08 !important;
    margin-top: 18px !important;
    letter-spacing: -0.01em !important;
    padding: 0 4px;
  }

  /* HERO landing — subtitle */
  .section.marble h1 + p {
    font-size: 19px !important;
    line-height: 1.4 !important;
    margin-top: 20px !important;
    padding: 0 8px;
  }

  /* Hero inner padding */
  .section.marble > div[style*="padding: 40px 64px"],
  .section.marble > div[style*="padding: 80px 64px"] {
    padding: 24px 20px 0 !important;
  }

  /* Eyebrow */
  .eyebrow { font-size: 10px !important; letter-spacing: 0.18em !important; }

  /* Video card */
  .card-marble { padding: 6px !important; }
  .section.marble .card-marble + * { margin-top: 12px !important; }

  /* CTA button */
  .btn {
    padding: 14px 20px !important;
    font-size: 13px !important;
    width: 100%;
    max-width: 320px;
    justify-content: center !important;
    text-align: center;
  }

  /* Form section : Typeform wrapper */
  #form {
    padding: 64px 0 64px !important;
  }
  #form > div[style*="max-width: 880px"],
  #form > div[style*="maxWidth: 880px"] {
    padding: 0 16px !important;
  }
  #form h3 {
    font-size: 32px !important;
    line-height: 1.1 !important;
    margin: 18px 0 12px !important;
  }
  #form > div > p {
    font-size: 17px !important;
    margin-bottom: 28px !important;
  }
  .tf-wrapper { padding: 6px !important; }
  .tf-wrapper > div { min-height: 540px !important; }

  /* Footer */
  footer.section {
    flex-direction: column !important;
    gap: 12px !important;
    padding: 24px 20px !important;
    text-align: center;
    align-items: center !important;
  }

  /* MERCI page — hero title */
  .section.marble h1[style*="92"] {
    font-size: 44px !important;
    line-height: 1.05 !important;
  }

  /* MERCI — section titles (h2) */
  .section h2 {
    font-size: 36px !important;
    line-height: 1.1 !important;
    padding: 0 4px;
  }
  .section h2 + p {
    font-size: 17px !important;
    line-height: 1.45 !important;
    padding: 0 8px;
  }

  /* MERCI — section subtitle h3 */
  .section h3 {
    font-size: 26px !important;
  }

  /* MERCI — Info cards grid (3 cols → 1 col) */
  .section.marble > div > div[style*="grid-template-columns: repeat(3, 1fr)"],
  .section.marble > div > div[style*="gridTemplateColumns: repeat(3, 1fr)"],
  .container > div[style*="grid-template-columns: repeat(3, 1fr)"],
  .container > div[style*="gridTemplateColumns: repeat(3, 1fr)"] {
    grid-template-columns: 1fr !important;
  }
  .section .container > div > div[style*="border-left"],
  .section .container > div > div[style*="borderLeft"] {
    border-left: none !important;
    border-top: 1px solid var(--line) !important;
  }
  .section .container > div > div[style*="border-left"]:first-child,
  .section .container > div > div[style*="borderLeft"]:first-child {
    border-top: none !important;
  }

  /* MERCI — Maxime portrait + text : stack */
  .container > div[style*="grid-template-columns: auto 1fr"],
  .container > div[style*="gridTemplateColumns: auto 1fr"] {
    grid-template-columns: 1fr !important;
    gap: 28px !important;
    padding: 24px !important;
  }
  .container > div[style*="grid-template-columns: auto 1fr"] > div:first-child,
  .container > div[style*="gridTemplateColumns: auto 1fr"] > div:first-child {
    width: 100% !important;
    max-width: 100% !important;
    min-height: 320px !important;
  }

  /* MERCI — YouTube/Guide split layout → stack */
  .container > div[style*="grid-template-columns: 1.1fr 1fr"],
  .container > div[style*="gridTemplateColumns: 1.1fr 1fr"] {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }

  /* MERCI — Mise en garde */
  .container > div[style*="border: 1px solid var(--accent)"] {
    padding: 24px !important;
    grid-template-columns: 1fr !important;
    gap: 16px !important;
    text-align: left;
  }
  /* MERCI — Mise en garde : shrink the "!" badge */
  .container > div[style*="border: 1px solid var(--accent)"] > div:first-child {
    width: 40px !important;
    height: 40px !important;
  }
  .container > div[style*="border: 1px solid var(--accent)"] > div:first-child > span {
    font-size: 22px !important;
  }

  /* MERCI — YouTube button : center on mobile */
  #youtube-minozan,
  a[href*="youtube.com"] {
    margin-left: auto !important;
    margin-right: auto !important;
  }

  /* Section vertical paddings */
  section.section {
    padding-top: 64px !important;
    padding-bottom: 64px !important;
  }
}

/* --- Small phones (≤ 420px) --- */
@media (max-width: 420px) {
  .section.marble h1 {
    font-size: 32px !important;
  }
  .section.marble h1 + p {
    font-size: 17px !important;
  }
  .section h2 {
    font-size: 30px !important;
  }
  .section > div {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }
}