@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Mono:wght@400;500&family=DM+Sans:wght@300;400;500&display=swap');

:root {
  --blue:   #2C3F50;
  --green:  #80BAA8;
  --yellow: #E0FECA;

  --ink:    var(--blue);
  --paper:  var(--yellow);
  --accent: var(--green);
  --muted:  #5a7a6e;
  --rule:   #c4dfd7;
  --card:   #edfce8;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'DM Sans', sans-serif;
  overflow-x: hidden;
}

/* HEADER */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.1rem 2rem;
  transition: background-color 0.3s, box-shadow 0.3s, padding 0.3s;
}

header.scrolled {
  background: var(--ink);
  box-shadow: 0 2px 20px rgba(0,0,0,0.15);
  padding: 0.7rem 2rem;
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Logo */
.logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo img {
  height: 36px;
  width: auto;
}

.logo-fallback {
  display: none;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: var(--yellow);
  line-height: 1.1;
}

.logo-fallback em {
  font-style: normal;
  color: var(--green);
}

/* Nav */
nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-head {
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--yellow);
  padding: 0.45rem 0.9rem;
  border-radius: 2px;
  transition: background-color 0.2s, color 0.2s;
}

.nav-head:hover {
  background: rgba(224,254,202,0.12);
}

.cta {
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--green);
  color: var(--ink);
  padding: 0.5rem 1.1rem;
  border-radius: 2px;
  transition: background-color 0.2s, transform 0.15s;
  display: flex;
  align-items: center;
}

.cta:hover {
  background: var(--yellow);
  transform: translateY(-1px);
}

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
}

.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--yellow);
  transition: transform 0.25s, opacity 0.25s;
}

.burger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══════════════════════════════════
   HERO
═══════════════════════════════════ */
.hero {
  min-height: 100vh;
  background: var(--ink);
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 7rem 2rem 4rem;
}

/* lignes de fond */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-lines {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 59px,
      rgba(128,186,168,0.07) 59px,
      rgba(128,186,168,0.07) 60px
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 59px,
      rgba(128,186,168,0.07) 59px,
      rgba(128,186,168,0.07) 60px
    );
}

/* cercle décoratif */
.hero-bg::after {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  border: 1px solid rgba(128,186,168,0.15);
  right: -150px;
  top: 50%;
  transform: translateY(-50%);
}

.hero-inner {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid rgba(128,186,168,0.35);
  padding: 0.35rem 0.85rem;
  border-radius: 100px;
  margin-bottom: 1.75rem;
  animation: fadeUp 0.6s ease both;
}

.hero-tag .material-icons { font-size: 0.9rem; }

.hero-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(3.8rem, 10vw, 7.5rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: var(--yellow);
  margin-bottom: 1.75rem;
  animation: fadeUp 0.6s 0.1s ease both;
}

.hero-accent {
  color: var(--green);
  display: inline-block;
}

.hero-stroke {
  -webkit-text-stroke: 2px var(--yellow);
  color: transparent;
  display: inline-block;
}

.hero-sub {
  max-width: 480px;
  font-size: 1rem;
  line-height: 1.65;
  color: rgba(224,254,202,0.65);
  margin-bottom: 2.25rem;
  font-weight: 300;
  animation: fadeUp 0.6s 0.2s ease both;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--green);
  color: var(--ink);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 1.75rem;
  border-radius: 2px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  animation: fadeUp 0.6s 0.3s ease both;
  box-shadow: 4px 4px 0 rgba(128,186,168,0.25);
}

.hero-cta:hover {
  background: var(--yellow);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(128,186,168,0.3);
}

/* Stats bar */
.hero-stats {
  max-width: 1100px;
  width: 100%;
  margin: 4rem auto 0;
  display: flex;
  align-items: center;
  gap: 0;
  border-top: 1px solid rgba(128,186,168,0.2);
  padding-top: 2rem;
  position: relative;
  z-index: 1;
  animation: fadeUp 0.6s 0.4s ease both;
}

.hero-stat {
  flex: 1;
  text-align: center;
}

.hero-stat-sep {
  width: 1px;
  height: 32px;
  background: rgba(128,186,168,0.25);
}

.stat-val {
  display: block;
  font-family: 'DM Mono', monospace;
  font-size: 1.05rem;
  color: var(--yellow);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.stat-lbl {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(224,254,202,0.45);
}

/* ═══════════════════════════════════
   SECTION CALCULATEUR
═══════════════════════════════════ */
.section-calc {
  background: var(--paper);
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 27px,
    var(--rule) 27px,
    var(--rule) 28px
  );
  padding: 5rem 2rem 6rem;
}

.section-header {
  max-width: 540px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(128,186,168,0.18);
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  margin-bottom: 0.9rem;
}

.section-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: 0.04em;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 0.75rem;
}

.section-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.calc-wrapper {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 1.25rem;
}

.calc-note {
  max-width: 760px;
  margin: 1rem auto 0;
  font-size: 0.75rem;
  color: var(--muted);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

/* ── CARD ── */
.card {
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-radius: 2px;
  padding: 1.75rem;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 0.15s, box-shadow 0.15s;
}

.card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

.card-label {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.card-icon {
  font-size: 1.1rem !important;
  vertical-align: middle;
}

/* ── CHAMPS ── */
.field-group {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}

.field-group.mb { margin-bottom: 1.25rem; }

.field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field.distance { flex: 2; }

label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

input[type="number"] {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 2px solid var(--ink);
  padding: 0.5rem 0;
  font-family: 'DM Mono', monospace;
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--ink);
  text-align: center;
  outline: none;
  transition: border-color 0.2s;
  appearance: textfield;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }

input[type="number"]:focus { border-color: var(--accent); }
input[type="number"]::placeholder { color: var(--rule); }

.sep {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.8rem;
  color: var(--muted);
  padding-bottom: 0.3rem;
  line-height: 1;
  flex-shrink: 0;
}

/* ── RÉSULTATS ── */
.results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.result-box {
  background: var(--ink);
  color: var(--yellow);
  padding: 1rem;
  border-radius: 2px;
}

.result-box:first-child {
  background: var(--accent);
  color: var(--ink);
}

.result-label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 0.4rem;
}

.result-value {
  font-family: 'DM Mono', monospace;
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.1;
}

.result-unit {
  font-size: 0.75rem;
  opacity: 0.6;
  margin-top: 0.2rem;
}

/* ── TEMPS DE PASSAGE ── */
.passage-result {
  display: none;
  margin-top: 1.25rem;
  padding: 1.2rem 1.5rem;
  border: 1.5px dashed var(--accent);
  border-radius: 2px;
  text-align: center;
  animation: fadeIn 0.3s ease;
}

.passage-result.visible { display: block; }

.passage-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 1.25rem;
  font-size: 0.78rem;
  color: var(--muted);
  font-style: italic;
}

.passage-hint.hidden { display: none; }

.passage-intro {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.passage-time {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.6rem;
  color: var(--ink);
  letter-spacing: 0.06em;
  line-height: 1;
}

.passage-dist {
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

/* ── ÉTAT VIDE ── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 1.5rem 0 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

/* ════════════════════════════════════════
   BLOC VMA
════════════════════════════════════════ */

.vma-result {
  margin-top: 1.25rem;
  animation: fadeIn 0.3s ease;
}

.vma-result-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  border: 1.5px solid var(--ink);
  border-radius: 2px;
  overflow: hidden;
}

.vma-main {
  background: var(--ink);
  color: var(--yellow);
  padding: 1.1rem 1.25rem;
  text-align: center;
}

.vma-main:first-child {
  background: var(--accent);
  color: var(--ink);
}

.vma-sep {
  width: 1px;
  background: rgba(255,255,255,0.12);
}

.vma-formula {
  margin-top: 0.6rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  font-style: italic;
}

.vma-empty {
  margin-top: 1.25rem;
  text-align: center;
  padding: 1.5rem 0 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

/* Accordion % éditables */
.vma-details {
  margin-top: 1.5rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}

.vma-summary {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color 0.2s;
}
.vma-summary::-webkit-details-marker { display: none; }
.vma-summary:hover { color: var(--accent); }
.vma-details[open] .vma-summary { color: var(--accent); }

.vma-table {
  margin-top: 1rem;
  border: 1.5px solid var(--ink);
  border-radius: 2px;
  overflow: hidden;
}

.vma-table-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 0.5rem 1rem;
  background: var(--ink);
  color: var(--yellow);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.vma-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.82rem;
  color: var(--ink);
  transition: background-color 0.15s;
}
.vma-row:hover { background: rgba(128,186,168,0.08); }

.vma-pct-field {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.vma-pct-field input[type="number"] {
  width: 3.5rem;
  font-size: 0.95rem;
  text-align: center;
  padding: 0.2rem 0;
  border-bottom-width: 1.5px;
}

.vma-pct-field em {
  font-style: normal;
  font-size: 0.8rem;
  color: var(--muted);
}

.vma-reset {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  padding: 0.6rem;
  border: none;
  border-top: 1px solid var(--rule);
  background: transparent;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}
.vma-reset:hover { background: var(--ink); color: var(--yellow); }

/* ── ANIMATIONS ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* FOOTER */
.site-footer {
  background: var(--ink);
  color: var(--yellow);
  padding: 3.5rem 2rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 1.5rem 3rem;
  align-items: start;
}

.footer-brand { 
  grid-column: 1;
  align-self: end;
}

.footer-logo {
  height: 32px;
  width: auto;
  margin-bottom: 0.6rem;
}

.footer-logo-fallback {
  display: none;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--yellow);
  margin-bottom: 0.6rem;
}

.footer-tagline {
  font-size: 0.8rem;
  color: rgba(224,254,202,0.5);
  font-style: italic;
}

.footer-tagline a {
  color: inherit;
  text-decoration: none;
}

.footer-tagline a:hover {
  color: var(--green);
}

.footer-links {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-align: right;
}

.footer-links a {
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(224,254,202,0.6);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--green); }

/* ═══════════════════════════════════
   ANIMATIONS
═══════════════════════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════
   RESPONSIVE
═══════════════════════════════════ */
@media (max-width: 640px) {
  header { padding: 0.9rem 1.25rem; }
  header.scrolled { padding: 0.6rem 1.25rem; }

  nav { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--ink); padding: 1rem; gap: 0.25rem; }
  nav.open { display: flex; }

  .burger { display: flex; }

  .hero { padding: 6rem 1.25rem 3rem; }
  .hero-stats { flex-wrap: wrap; gap: 1rem; padding-top: 1.5rem; }
  .hero-stat-sep { display: none; }
  .hero-stat { flex: 1 1 30%; }

  .section-calc { padding: 3.5rem 1.25rem 4rem; }

  .field-group { flex-wrap: wrap; }
  .field.distance { flex: 100%; }

  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { grid-column: 1; text-align: left; flex-direction: row; flex-wrap: wrap; gap: 1rem; }
}