/* Focus or Suffer — page de présentation.
   Reprend le langage visuel de l'extension : nuit profonde, ambre, serif pour
   les titres, et du pixel art affiché en `pixelated`. */

:root {
  --bg: #0b0818;
  --bg-alt: #100c22;
  --card: rgba(24, 19, 48, 0.66);
  --line: rgba(246, 241, 234, 0.1);
  --ink: #f4efe8;
  --ink-dim: #bdb2c9;
  --ink-faint: #8d84a0;
  --amber: #f2b47a;
  --green: #7fd1a6;
  --red: #f08e8e;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --page: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* Sans cela, le `display` des règles ci-dessous l'emporterait sur l'attribut
   `hidden`, et les éléments masqués resteraient visibles. */
[hidden] {
  display: none !important;
}

a {
  color: var(--amber);
  text-underline-offset: 3px;
  text-decoration-color: rgba(242, 180, 122, 0.4);
}

a:hover {
  text-decoration-color: var(--amber);
}

*:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── Typographie commune ─────────────────────────────────────────── */

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  margin: 0;
}

h2 {
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.12;
  margin-bottom: 22px;
}

h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.kicker {
  margin: 0 0 14px;
  font-family: var(--sans);
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.lead {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(16.5px, 1.6vw, 19px);
  color: var(--ink-dim);
}

.lead.center {
  margin-inline: auto;
  text-align: center;
}

.aside {
  max-width: 62ch;
  margin: 34px 0 0;
  padding-left: 18px;
  border-left: 2px solid rgba(242, 180, 122, 0.45);
  font-size: 15.5px;
  color: var(--ink-faint);
}

code {
  font-family: var(--mono);
  font-size: 0.88em;
  padding: 2px 6px;
  border-radius: 5px;
  background: rgba(246, 241, 234, 0.09);
  color: var(--ink-dim);
}

/* ── Hero ────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: min(92vh, 860px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.hero-scene {
  position: absolute;
  inset: 0;
  background: url("img/scene-aube.png") center / cover no-repeat;
  /* Sans cela le navigateur lisse le pixel art et tout l'effet disparaît. */
  image-rendering: pixelated;
  transform: scale(1.03);
  animation: drift 40s ease-out forwards;
}

@keyframes drift {
  to {
    transform: scale(1);
  }
}

/* Le voile doit tenir sur les dix décors, y compris les plus clairs comme
   « Synthwave » : le texte passe alors sur des zones très contrastées. */
.hero-veil {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 85% at 50% 44%, rgba(9, 6, 20, 0.42) 0%, rgba(9, 6, 20, 0.8) 100%),
    linear-gradient(to bottom, rgba(9, 6, 20, 0.66), rgba(9, 6, 20, 0.38) 42%, var(--bg) 99%);
}

.nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: var(--page);
  margin: 0 auto;
  padding: 22px 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
}

.nav-brand img {
  image-rendering: pixelated;
}

.nav-link {
  font-size: 14px;
}

.hero-body {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  max-width: 900px;
  margin: 0 auto;
  padding: 4vh 24px 8vh;
  text-align: center;
}

.eyebrow {
  margin: 0 0 20px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

h1 {
  /* Borné par la hauteur autant que par la largeur : sur une fenêtre large mais
     courte, un titre en vw seuls déborde. */
  font-size: clamp(46px, min(11vw, 19vh), 132px);
  line-height: 0.94;
  text-shadow: 0 2px 46px rgba(0, 0, 0, 0.6);
}

.hero-or {
  color: var(--amber);
  font-style: italic;
}

.hero-lede {
  max-width: 54ch;
  margin: 26px 0 0;
  font-size: clamp(16.5px, 1.9vw, 20px);
  color: var(--ink-dim);
  text-shadow: 0 1px 14px rgba(6, 4, 14, 0.85);
}

.hero-lede strong {
  color: var(--ink);
  font-weight: 600;
}

.hero-note {
  margin: 30px 0 0;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-faint);
}

/* ── Boutons ─────────────────────────────────────────────────────── */

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.cta-row.center {
  justify-content: center;
}

.btn {
  display: inline-block;
  font: inherit;
  font-weight: 570;
  font-size: 15.5px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 130ms ease, background-color 160ms ease, border-color 160ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--amber);
  color: #2b1608;
}

.btn-primary:hover:not(:disabled) {
  background: #f8cb9c;
}

.btn-ghost {
  background: rgba(246, 241, 234, 0.07);
  border-color: rgba(246, 241, 234, 0.24);
  color: var(--ink);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover:not(:disabled) {
  background: rgba(246, 241, 234, 0.14);
}

.btn-sm {
  font-size: 14px;
  padding: 10px 20px;
}

.btn-lg {
  font-size: 17px;
  padding: 16px 34px;
}

/* ── Sections ────────────────────────────────────────────────────── */

.section {
  max-width: var(--page);
  margin: 0 auto;
  padding: clamp(64px, 9vw, 116px) 24px;
}

.section-dark {
  max-width: none;
  background: var(--bg-alt);
  border-block: 1px solid var(--line);
}

.section-dark > * {
  max-width: var(--page);
  margin-inline: auto;
}

/* ── Les deux plateaux de la balance ─────────────────────────────── */

.scales {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 44px;
}

.scale {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
}

.scale ul {
  margin: 0;
  padding-left: 20px;
  color: var(--ink-dim);
  font-size: 15.5px;
}

.scale li + li {
  margin-top: 9px;
}

.scale-label {
  margin: 0;
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.scale-time {
  margin: 6px 0 20px;
  font-family: var(--serif);
  font-size: 42px;
  line-height: 1;
}

.scale-easy {
  border-color: rgba(127, 209, 166, 0.34);
}

.scale-easy .scale-time {
  color: var(--green);
}

.scale-hard {
  border-color: rgba(242, 180, 122, 0.4);
  background: rgba(52, 32, 24, 0.5);
}

.scale-hard .scale-time {
  color: var(--amber);
}

.scale-hard strong {
  color: var(--ink);
}

.scale-foot {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(242, 180, 122, 0.22);
  font-size: 14px;
  color: var(--ink-faint);
}

/* ── Démonstration du casse-tête ─────────────────────────────────── */

.demo {
  max-width: 620px;
  margin: 40px auto 0;
  padding: 30px 32px 26px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #16112c;
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.45);
}

.demo.is-shaking {
  animation: shake 400ms cubic-bezier(0.36, 0.07, 0.19, 0.97);
}

@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60% { transform: translateX(7px); }
}

.demo-steps {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.demo-steps span {
  flex: 1;
  padding: 8px 4px 0;
  border-top: 2px solid rgba(246, 241, 234, 0.14);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-faint);
  transition: color 200ms ease, border-color 200ms ease;
}

.demo-steps span.is-current {
  border-top-color: var(--amber);
  color: var(--amber);
}

.demo-steps span.is-done {
  border-top-color: var(--green);
  color: var(--green);
}

.demo-body {
  min-height: 190px;
}

.demo-hint {
  margin: 0 0 16px;
  font-size: 14.5px;
  color: var(--ink-dim);
}

.demo-idle {
  display: grid;
  place-items: center;
  min-height: 190px;
  text-align: center;
  color: var(--ink-faint);
  font-size: 15px;
}

.demo-ring {
  display: grid;
  place-items: center;
  width: 96px;
  height: 96px;
  margin: 6px auto 20px;
  border-radius: 50%;
  border: 2px solid rgba(242, 180, 122, 0.4);
  animation: breathe 5s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { transform: scale(0.92); border-color: rgba(242, 180, 122, 0.28); }
  50% { transform: scale(1.06); border-color: rgba(242, 180, 122, 0.7); }
}

.demo-count {
  font-family: var(--serif);
  font-size: 36px;
  color: var(--amber);
}

.demo-center {
  text-align: center;
}

.demo-source {
  margin: 0 0 12px;
  padding: 15px 17px;
  border-radius: 12px;
  border: 1px solid rgba(242, 180, 122, 0.24);
  background: rgba(10, 7, 22, 0.62);
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.5;
  /* Empêche de sélectionner la phrase pour la copier. */
  user-select: none;
  -webkit-user-select: none;
}

.demo-input,
.demo-sum input {
  font: inherit;
  color: var(--ink);
  background: rgba(10, 7, 22, 0.72);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 13px;
}

.demo-input {
  display: block;
  width: 100%;
  resize: vertical;
  font-size: 15.5px;
  line-height: 1.5;
}

.demo-input:focus,
.demo-sum input:focus {
  outline: none;
  border-color: rgba(242, 180, 122, 0.6);
  box-shadow: 0 0 0 3px rgba(242, 180, 122, 0.12);
}

.demo-meter {
  height: 3px;
  margin: 10px 0 0;
  border-radius: 999px;
  background: rgba(246, 241, 234, 0.1);
  overflow: hidden;
}

.demo-meter span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--green);
  transition: width 120ms linear, background-color 160ms ease;
}

.demo-meter span.is-off {
  background: var(--red);
}

.demo-sums {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.demo-sum {
  display: flex;
  align-items: center;
  gap: 12px;
}

.demo-sum span {
  flex: 1;
  font-family: var(--mono);
  font-size: 16px;
  user-select: none;
}

.demo-sum input {
  width: 108px;
  text-align: right;
}

.demo-win {
  display: grid;
  place-items: center;
  min-height: 190px;
  text-align: center;
}

.demo-win p {
  max-width: 42ch;
  margin: 0;
  color: var(--ink-dim);
}

.demo-win strong {
  display: block;
  margin-bottom: 10px;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 400;
  color: var(--green);
}

.demo-error {
  margin: 16px 0 0;
  min-height: 1.4em;
  font-size: 13.5px;
  color: var(--red);
}

.demo-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ── Galerie ─────────────────────────────────────────────────────── */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 40px;
}

.tile {
  padding: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(10, 7, 22, 0.5);
  font: inherit;
  text-align: left;
  color: var(--ink);
  cursor: pointer;
  overflow: hidden;
  transition: transform 170ms ease, border-color 170ms ease;
}

.tile img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  image-rendering: pixelated;
  margin-bottom: 10px;
}

.tile:hover {
  transform: translateY(-3px);
  border-color: rgba(246, 241, 234, 0.3);
}

.tile.is-active {
  border-color: var(--amber);
}

.tile b {
  display: block;
  padding: 0 12px;
  font-size: 14px;
  font-weight: 600;
}

.tile em {
  display: block;
  padding: 0 12px;
  font-size: 12px;
  font-style: normal;
  color: var(--ink-faint);
}

.tile.is-active b {
  color: var(--amber);
}

.gallery-hint {
  margin: 18px 0 0;
  font-size: 13.5px;
  color: var(--ink-faint);
}

/* ── Citation ────────────────────────────────────────────────────── */

.section-quote {
  text-align: center;
}

.section-quote .kicker,
.section-final .kicker {
  text-align: center;
}

.big-quote {
  max-width: 34ch;
  margin: 0 auto 26px;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.34;
}

.big-quote cite {
  display: block;
  margin-top: 16px;
  font-family: var(--sans);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.big-quote cite::before {
  content: "— ";
}

#quoteNext {
  margin-top: 26px;
}

/* ── Cartes ──────────────────────────────────────────────────────── */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 40px;
}

.card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.card p {
  margin: 0;
  font-size: 15.5px;
  color: var(--ink-dim);
}

/* ── FAQ ─────────────────────────────────────────────────────────── */

.faq {
  max-width: 76ch;
  margin-top: 36px;
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  padding: 20px 34px 20px 0;
  position: relative;
  font-size: 17px;
  font-weight: 560;
  cursor: pointer;
  list-style: none;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 18px;
  font-size: 21px;
  color: var(--amber);
  transition: transform 180ms ease;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq p {
  margin: 0 0 22px;
  max-width: 68ch;
  color: var(--ink-dim);
  font-size: 15.5px;
}

/* ── Bloc final ──────────────────────────────────────────────────── */

.section-final {
  text-align: center;
  padding-bottom: clamp(72px, 10vw, 130px);
}

.section-final h2 {
  font-size: clamp(38px, 7vw, 76px);
}

.install-note {
  max-width: 54ch;
  margin: 22px auto 0;
  font-size: 14px;
  color: var(--ink-faint);
}

/* ── Pied ────────────────────────────────────────────────────────── */

.footer {
  padding: 34px 24px 44px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 13.5px;
  color: var(--ink-faint);
}

.footer p {
  margin: 0 0 8px;
}

.footer-fine {
  font-size: 12.5px;
  opacity: 0.8;
}

/* ── Adaptations ─────────────────────────────────────────────────── */

@media (max-width: 620px) {
  /* Des boutons de largeurs inégales, empilés, donnent un alignement bancal. */
  .cta-row {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 340px;
  }
  .cta-row .btn {
    text-align: center;
  }
  .eyebrow {
    letter-spacing: 0.14em;
  }
  .demo {
    padding: 24px 20px 20px;
  }
  .demo-actions {
    flex-direction: column-reverse;
  }
  .demo-actions .btn {
    width: 100%;
  }
  .scale {
    padding: 22px;
  }
  .hero-body {
    padding-bottom: 6vh;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .hero-scene {
    transform: none;
  }
}