/* GazeBar website: one shared style sheet for the French and English pages.
   Large text, large buttons and strong contrast, because visitors may use
   an eyetracker, a head mouse or a screen magnifier. */

:root {
  --text: #0d1b3e;
  --text-soft: #3a4766;
  --background: #ffffff;
  --band: #f2f5fb;
  --line: #d5dcea;
  --blue: #1557d6;
  --blue-dark: #0e3f9e;
  --focus: #ff7a00;
  --gradient: linear-gradient(90deg, #00b4ff, #3b5bff 30%, #c13cff 60%, #ff3d7f 80%, #ff8a00);
  --radius: 18px;
  --max: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 125%; /* 20 px for most browsers */
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--blue);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--blue-dark);
}

:focus-visible {
  outline: 4px solid var(--focus);
  outline-offset: 4px;
  border-radius: 6px;
}

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Hidden until focused with the keyboard. */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  padding: 0.6rem 1rem;
  background: var(--text);
  color: #fff;
  z-index: 10;
}

.skip-link:focus {
  top: 1rem;
  color: #fff;
}

/* ---------- Top bar ---------- */

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

.top::before {
  content: "";
  display: block;
  height: 6px;
  background: var(--gradient);
}

.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 84px;
}

.top-name {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.top-name img {
  width: 52px;
  height: 52px;
}

/* Big target for the language switch: easy to reach with the eyes. */
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  gap: 0.6rem;
  min-width: 160px;
  padding: 0.4rem 1.2rem;
  border: 2px solid var(--blue);
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
}

.lang-switch img {
  height: 18px;
  width: auto;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.lang-switch:hover {
  background: var(--blue);
  color: #fff;
}

/* ---------- Hero ---------- */

.hero {
  padding: 2.5rem 0 3rem;
  text-align: center;
}

.hero-logo {
  display: block;
  width: 100%;
  max-width: 720px;
  margin: 0 auto 1.5rem;
}

.hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.25;
  margin: 0 auto 1rem;
  max-width: 24em;
}

.hero .lead {
  font-size: 1.15rem;
  color: var(--text-soft);
  max-width: 36em;
  margin: 0 auto 2rem;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
}

/* Buttons are at least 72 px tall, with space around them. */
.button {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  min-width: 260px;
  padding: 0.7rem 2rem;
  border-radius: var(--radius);
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  line-height: 1.3;
}

.button small {
  font-size: 0.75rem;
  font-weight: 400;
}

.button-main {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 6px 18px rgba(21, 87, 214, 0.3);
}

.button-main:hover {
  background: var(--blue-dark);
  color: #fff;
}

.button-second {
  border: 2px solid var(--blue);
  color: var(--blue);
  background: #fff;
}

.button-second:hover {
  background: var(--band);
}

/* ---------- Sections ---------- */

section {
  padding: 3rem 0;
}

section.band {
  background: var(--band);
}

h2 {
  font-size: 1.7rem;
  line-height: 1.3;
  margin: 0 0 1.5rem;
}

h2::after {
  content: "";
  display: block;
  width: 90px;
  height: 6px;
  margin-top: 0.5rem;
  border-radius: 3px;
  background: var(--gradient);
}

h3 {
  font-size: 1.2rem;
  margin: 0 0 0.4rem;
}

p {
  margin: 0 0 1rem;
}

.text {
  max-width: 40em;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
}

.card p {
  margin: 0;
  color: var(--text-soft);
}

.card-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 0.6rem;
}

/* The story is told as a quote, to show it is a person speaking. */
.story {
  border-left: 8px solid transparent;
  border-image: var(--gradient) 1;
  padding: 0.2rem 0 0.2rem 1.4rem;
  max-width: 40em;
}

/* Screenshots: an empty frame waits until real pictures are added. */
.shots {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
  margin: 0;
}

.shots figure {
  margin: 0;
}

.shot-frame {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 16 / 9;
  border: 3px dashed var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--text-soft);
  text-align: center;
  padding: 1rem;
}

.shots figcaption {
  margin-top: 0.5rem;
  font-weight: 600;
}

.steps {
  max-width: 40em;
  padding-left: 1.4rem;
}

.steps li {
  margin-bottom: 0.8rem;
  padding-left: 0.3rem;
}

.notice {
  max-width: 40em;
  background: #fff6e8;
  border: 2px solid #f0b75e;
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
}

.notice p:last-child {
  margin: 0;
}

/* ---------- Footer ---------- */

footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  font-size: 0.85rem;
  color: var(--text-soft);
}

footer p {
  max-width: 48em;
}

@media (max-width: 600px) {
  html {
    font-size: 112.5%; /* 18 px on phones */
  }

  .top-name span {
    display: none;
  }

  .button {
    width: 100%;
    min-width: 0;
  }

  section {
    padding: 2.2rem 0;
  }
}