/* ==========================================================================
   OKTUO — feuille de style du site provisoire
   ========================================================================== */

:root {
  --color-primary: #8722E6;
  --color-primary-light: #B565F5;
  --color-primary-dark: #5E17A8;
  --color-ink: #1A1025;
  --color-body: #5B5468;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F6F2FB;
  --color-border: #E4DBF0;
  --color-success: #1F8A5B;
  --color-error: #C0392B;

  --font-display: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;

  --max-width: 1120px;
  --radius: 4px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@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;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--color-ink);
  margin: 0;
  line-height: 1.1;
  font-weight: 600;
}

p {
  margin: 0;
}

a {
  color: var(--color-primary);
}

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* Focus visibility (accessibility floor) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-icon {
  height: 32px;
  width: auto;
}

.brand-title {
  height: 20px;
  width: auto;
}

.site-header nav a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
  color: var(--color-ink);
  padding: 10px 22px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius);
  transition: background 0.15s ease, color 0.15s ease;
}

.site-header nav a:hover {
  background: var(--color-ink);
  color: #fff;
}

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

.hero {
  position: relative;
  overflow: hidden;
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
  padding-top: 96px;
  padding-bottom: 96px;
  min-height: 560px;
}

.hero-copy h1 {
  font-size: clamp(2.1rem, 4vw, 3.4rem);
  max-width: 14ch;
}

.hero-copy p {
  margin-top: 24px;
  font-size: 1.125rem;
  max-width: 46ch;
  color: var(--color-body);
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 28px;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

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

.hero-graphic {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-graphic img {
  width: 100%;
  max-width: 420px;
  animation: slow-spin 90s linear infinite;
}

@keyframes slow-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

section {
  padding: 88px 0;
}

.section-heading {
  max-width: 62ch;
}

.section-heading h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}

.section-heading p {
  margin-top: 18px;
  font-size: 1.05rem;
}

/* Presentation */

.about {
  border-top: 1px solid var(--color-border);
}

/* Value props */

.values {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.values-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.value-item {
  border-top: 2px solid var(--color-primary);
  padding-top: 20px;
}

.value-item h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.value-item p {
  margin-top: 10px;
  font-size: 0.98rem;
}

/* ---------- Contact ---------- */

.contact .wrap {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}

.contact-intro h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}

.contact-intro p {
  margin-top: 18px;
  max-width: 40ch;
}

form {
  display: grid;
  gap: 20px;
}

.field {
  display: grid;
  gap: 8px;
}

label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-ink);
}

input[type="text"],
input[type="email"],
textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--color-ink);
  resize: vertical;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
  border-color: var(--color-primary);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  font-size: 0.95rem;
  min-height: 1.4em;
}

.form-status.success {
  color: var(--color-success);
}

.form-status.error {
  color: var(--color-error);
}

.contact button[type="submit"] {
  justify-self: start;
}

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

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 28px 0;
}

.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer p {
  font-size: 0.875rem;
  color: var(--color-body);
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .hero .wrap {
    grid-template-columns: 1fr;
    padding-top: 56px;
    padding-bottom: 48px;
    min-height: 0;
  }

  .hero-graphic {
    order: -1;
  }

  .hero-graphic img {
    max-width: 220px;
  }

  .values-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact .wrap {
    grid-template-columns: 1fr;
  }

  section {
    padding: 56px 0;
  }
}

@media (max-width: 520px) {
  .wrap {
    padding: 0 20px;
  }

  .site-header nav a {
    padding: 8px 16px;
    font-size: 14px;
  }
}