/* Brain Design — vitrine professionnelle */
:root {
  --color-night: #112d4e;
  --color-night-soft: #1a3f5c;
  --color-surface: #f0f7f8;
  --color-white: #ffffff;
  --color-muted: #5a7289;
  --color-text: #1a3347;
  --color-accent: #3ec1d3;
  --color-accent-dark: #2a9faf;
  --color-accent-soft: rgba(62, 193, 211, 0.14);
  --color-cyan: #81d8d0;
  --color-border: rgba(17, 45, 78, 0.12);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 12px 40px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 0 1px rgba(62, 193, 211, 0.25), 0 20px 50px -20px rgba(62, 193, 211, 0.35);
  --radius: 14px;
  --radius-lg: 22px;
  --font-display: "Lexend", system-ui, sans-serif;
  --font-body: "Instrument Sans", system-ui, sans-serif;
  --header-h: 72px;
  --max: 1120px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

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

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  left: 16px;
  top: 16px;
  width: auto;
  height: auto;
  padding: 12px 16px;
  background: var(--color-night);
  color: var(--color-white);
  border-radius: 8px;
  z-index: 9999;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-night);
  letter-spacing: -0.02em;
}

.logo:hover {
  color: var(--color-night);
}

.logo--img {
  gap: 0;
  line-height: 0;
}

.logo__img {
  display: block;
  height: 48px;
  width: auto;
  max-width: min(260px, 50vw);
  object-fit: contain;
}

.logo--img:hover .logo__img {
  opacity: 0.9;
}

@media (max-width: 480px) {
  .logo__img {
    height: 40px;
    max-width: 200px;
  }
}

.site-footer .logo--img .logo__img {
  height: 40px;
  max-width: 220px;
}

.logo__mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-night-soft) 55%, var(--color-cyan) 100%);
  display: grid;
  place-items: center;
  color: var(--color-white);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  display: block;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.nav__link:hover {
  color: var(--color-night);
  background: rgba(15, 23, 42, 0.05);
}

.nav__link.is-active {
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-white);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-night);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.2s;
}

.nav.is-open .nav__toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav.is-open .nav__toggle span:nth-child(2) {
  opacity: 0;
}

.nav.is-open .nav__toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 900px) {
  .nav__toggle {
    display: flex;
  }

  .nav__list {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    gap: 4px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s var(--ease), opacity 0.25s, visibility 0.25s;
  }

  .nav.is-open .nav__list {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    padding: 14px 16px;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s;
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-night) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-sm), 0 8px 24px rgba(62, 193, 211, 0.35);
}

.btn--primary:hover {
  color: var(--color-white);
  box-shadow: var(--shadow-glow);
}

.btn--secondary {
  background: var(--color-white);
  color: var(--color-night);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn--secondary:hover {
  color: var(--color-night);
  border-color: rgba(62, 193, 211, 0.35);
  background: var(--color-accent-soft);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn--ghost:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Layout */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 72px 0;
}

.section--tight {
  padding: 48px 0;
}

.section--surface {
  background: var(--color-white);
}

.section__head {
  max-width: 640px;
  margin-bottom: 40px;
}

.section__kicker {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin: 0 0 10px;
}

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-night);
  margin: 0 0 12px;
  line-height: 1.2;
}

.section__lead {
  margin: 0;
  color: var(--color-muted);
  font-size: 1.0625rem;
}

/* Hero */
.hero {
  position: relative;
  background: var(--color-night);
  color: var(--color-white);
  padding: clamp(56px, 10vw, 120px) 0 clamp(72px, 12vw, 140px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 80% -10%, rgba(62, 193, 211, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 10% 100%, rgba(34, 211, 238, 0.18) 0%, transparent 50%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
  pointer-events: none;
}

.hero .wrap {
  position: relative;
  z-index: 1;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
  }
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin: 0 0 20px;
}

.hero__title span {
  background: linear-gradient(90deg, var(--color-cyan), #b8f0f4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__text {
  margin: 0 0 28px;
  font-size: 1.125rem;
  color: rgba(226, 232, 240, 0.88);
  max-width: 540px;
}

.hero__card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 28px;
  backdrop-filter: blur(8px);
}

.hero__card h2 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 16px;
  color: rgba(255, 255, 255, 0.95);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  text-align: center;
}

.hero__stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-cyan);
}

.hero__stat span {
  font-size: 0.8125rem;
  color: rgba(226, 232, 240, 0.7);
}

/* Cards grid */
.cards {
  display: grid;
  gap: 20px;
}

@media (min-width: 640px) {
  .cards--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 768px) {
  .cards--2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s, box-shadow 0.25s var(--ease), transform 0.25s var(--ease);
}

.card:hover {
  border-color: rgba(62, 193, 211, 0.25);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}

.card__icon svg {
  width: 24px;
  height: 24px;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--color-night);
}

.card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

/* Service rows */
.service-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: start;
  padding: 24px;
  background: var(--color-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.service-item__icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-night-soft) 0%, var(--color-night) 100%);
  color: var(--color-cyan);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.service-item__icon svg {
  width: 26px;
  height: 26px;
}

.service-item h3 {
  font-family: var(--font-display);
  font-size: 1.125rem;
  margin: 0 0 8px;
  color: var(--color-night);
}

.service-item p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
}

/* Portfolio */
.portfolio {
  display: grid;
  gap: 20px;
}

@media (min-width: 640px) {
  .portfolio {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .portfolio {
    grid-template-columns: repeat(3, 1fr);
  }
}

.portfolio-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s, transform 0.25s var(--ease);
}

.portfolio-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.portfolio-card__thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, var(--color-night-soft) 0%, var(--color-night) 100%);
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  padding: 20px;
  text-align: center;
}

.portfolio-card__body {
  padding: 20px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.portfolio-card__body h3 {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  margin: 0 0 8px;
  color: var(--color-night);
}

.portfolio-card__body p {
  margin: 0 0 16px;
  font-size: 0.875rem;
  color: var(--color-muted);
  flex: 1;
}

.portfolio-card__link {
  font-weight: 600;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Cartes projets — Nos réalisations */
.portfolio--projects {
  gap: 24px;
}

.portfolio-card--project {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition:
    transform 0.4s var(--ease),
    box-shadow 0.4s var(--ease),
    border-color 0.35s var(--ease);
}

.portfolio-card--project::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  pointer-events: none;
  z-index: 1;
}

.portfolio-card--project:hover {
  transform: translateY(-8px);
  border-color: rgba(62, 193, 211, 0.35);
  box-shadow:
    0 24px 48px -12px rgba(15, 23, 42, 0.18),
    0 0 0 1px rgba(62, 193, 211, 0.12),
    0 0 40px -20px rgba(62, 193, 211, 0.25);
}

.portfolio-card--project .portfolio-card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  font-size: 1rem;
  transition: transform 0.55s var(--ease);
}

.portfolio-card--project:hover .portfolio-card__thumb {
  transform: scale(1.04);
}

.portfolio-card--project .portfolio-card__thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 35%, rgba(255, 255, 255, 0.07) 50%, transparent 65%);
  transform: translateX(-100%);
  transition: transform 0.85s var(--ease);
  pointer-events: none;
}

.portfolio-card--project:hover .portfolio-card__thumb::after {
  transform: translateX(100%);
}

.portfolio-card--project .portfolio-card__body {
  padding: 22px 24px 24px;
  position: relative;
  z-index: 2;
}

.portfolio-card--project .portfolio-card__body h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  word-break: break-word;
}

.portfolio-card--project .portfolio-card__body p {
  font-size: 0.9375rem;
  line-height: 1.55;
  margin-bottom: 20px;
}

.portfolio-card__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: auto;
  padding: 12px 20px;
  border-radius: 11px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-white) !important;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-night) 100%);
  box-shadow: 0 4px 14px rgba(62, 193, 211, 0.35);
  transition:
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease),
    filter 0.25s;
}

.portfolio-card__cta:hover {
  color: var(--color-white) !important;
  transform: translateX(2px);
  box-shadow: 0 8px 24px rgba(62, 193, 211, 0.45);
  filter: brightness(1.06);
}

.portfolio-card__cta svg {
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}

.portfolio-card--project:hover .portfolio-card__cta svg {
  transform: translateX(4px);
}

@media (prefers-reduced-motion: reduce) {
  .portfolio-card--project,
  .portfolio-card--project .portfolio-card__thumb,
  .portfolio-card--project .portfolio-card__thumb::after,
  .portfolio-card__cta,
  .portfolio-card__cta svg {
    transition: none;
  }

  .portfolio-card--project:hover {
    transform: translateY(-3px);
  }

  .portfolio-card--project:hover .portfolio-card__thumb {
    transform: none;
  }

  .portfolio-card--project:hover .portfolio-card__thumb::after {
    transform: translateX(-100%);
  }

  .portfolio-card--project:hover .portfolio-card__cta svg {
    transform: none;
  }
}

/* Why us */
.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.check-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 18px;
  background: var(--color-white);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.check-list svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

/* Contact */
.contact-grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact-card {
  background: var(--color-night);
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-card h2,
.contact-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 8px;
}

.contact-card > p {
  margin: 0 0 24px;
  color: rgba(226, 232, 240, 0.85);
  font-size: 0.9375rem;
}

.contact-detail {
  margin-bottom: 16px;
}

.contact-detail strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-cyan);
  margin-bottom: 4px;
}

.contact-detail a {
  color: var(--color-white);
  font-weight: 600;
  font-size: 1.0625rem;
}

.contact-detail a:hover {
  color: var(--color-cyan);
}

.form {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.form .form__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 0 0 22px;
  color: var(--color-night);
}

.form-row {
  margin-bottom: 18px;
}

.form label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 6px;
  color: var(--color-night);
}

.form input,
.form textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 0.8125rem;
  color: var(--color-muted);
  margin-top: 12px;
  line-height: 1.5;
}

.form-req {
  color: var(--color-accent-dark);
  font-weight: 700;
}

.form select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  font-family: inherit;
  font-size: 1rem;
  background-color: var(--color-white);
  color: var(--color-text);
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%235a7289'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 44px;
}

.form select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form-grid {
  display: grid;
  gap: 18px;
}

@media (min-width: 640px) {
  .form-grid--2 {
    grid-template-columns: 1fr 1fr;
  }
}

.form-grid--2 .form-row {
  margin-bottom: 0;
}

.form--contact .form-row:last-of-type {
  margin-bottom: 0;
}

.btn--submit {
  width: 100%;
  margin-top: 8px;
}

@media (min-width: 520px) {
  .btn--submit {
    width: auto;
    min-width: 220px;
  }
}

.contact-section {
  padding-bottom: 72px;
}

.contact-section .section__head {
  margin-bottom: 36px;
}

.contact-card__pitch {
  margin: 20px 0 24px;
  padding-top: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(248, 250, 252, 0.92);
}

.contact-detail span {
  display: block;
  font-weight: 600;
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.96);
}

/* Footer */
.site-footer {
  background: var(--color-night);
  color: rgba(226, 232, 240, 0.8);
  padding: 48px 0 32px;
  margin-top: auto;
}

.site-footer a {
  color: rgba(226, 232, 240, 0.9);
}

.site-footer a:hover {
  color: var(--color-cyan);
}

.site-footer__grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 768px) {
  .site-footer__grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

.site-footer__brand .logo {
  color: var(--color-white);
  margin-bottom: 12px;
}

.site-footer__brand p {
  margin: 0;
  font-size: 0.9375rem;
  max-width: 320px;
}

.site-footer h3 {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-cyan);
  margin: 0 0 14px;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin-bottom: 10px;
}

.site-footer__bottom {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
  text-align: center;
}

/* Page shell */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page main {
  flex: 1;
}

.page-header {
  padding: 40px 0 8px;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-night);
  margin: 0 0 12px;
}

.page-header p {
  margin: 0;
  color: var(--color-muted);
  max-width: 560px;
}

.prose {
  max-width: 720px;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 32px 0 12px;
  color: var(--color-night);
}

.prose p {
  margin: 0 0 16px;
  color: var(--color-text);
}

.cta-band {
  background: linear-gradient(135deg, var(--color-night-soft) 0%, var(--color-night) 100%);
  color: var(--color-white);
  padding: 48px 0;
  text-align: center;
  border-radius: var(--radius-lg);
  margin: 48px 0 0;
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  margin: 0 0 12px;
}

.cta-band p {
  margin: 0 auto 24px;
  max-width: 520px;
  color: rgba(226, 232, 240, 0.88);
}

.cta-band .btn-group {
  justify-content: center;
}

/* ——— Accueil landing ——— */
.logo--wordmark {
  gap: 0;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-night) 0%, #334155 50%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo--wordmark:hover {
  color: transparent;
  opacity: 0.88;
}

.site-header.is-scrolled {
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

.hero--landing {
  min-height: min(92vh, 900px);
  display: flex;
  align-items: center;
  padding: clamp(72px, 14vh, 120px) 0 clamp(64px, 10vh, 100px);
}

.hero--landing .wrap {
  width: 100%;
}

.hero--landing__inner {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
}

.hero__blobs {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.42;
  will-change: transform;
}

.hero__blob--1 {
  width: min(420px, 55vw);
  height: min(420px, 55vw);
  background: #3ec1d3;
  top: -12%;
  right: -8%;
  animation: blob-float-a 14s ease-in-out infinite;
}

.hero__blob--2 {
  width: min(360px, 50vw);
  height: min(360px, 50vw);
  background: #81d8d0;
  bottom: -5%;
  left: -10%;
  animation: blob-float-b 16s ease-in-out infinite;
}

.hero__blob--3 {
  width: min(280px, 40vw);
  height: min(280px, 40vw);
  background: #818cf8;
  top: 40%;
  left: 35%;
  opacity: 0.22;
  animation: blob-float-c 18s ease-in-out infinite;
}

@keyframes blob-float-a {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  40% {
    transform: translate(-24px, 18px) scale(1.06);
  }
  70% {
    transform: translate(12px, -10px) scale(0.96);
  }
}

@keyframes blob-float-b {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(20px, -24px) scale(1.08);
  }
}

@keyframes blob-float-c {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-30px, 20px);
  }
}

.hero__eyebrow {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
  margin: 0 0 20px;
}

.hero__title--landing {
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  line-height: 1.12;
  margin-bottom: 24px;
  color: var(--color-white);
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

.hero__title--landing span {
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
  color: inherit;
}

.hero__subtitle {
  margin: 0 auto 36px;
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.65;
  color: rgba(226, 232, 240, 0.9);
  max-width: 720px;
}

.hero--landing .hero__cta {
  justify-content: center;
}

.section--anchor {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

/* Apparition au scroll */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.75s var(--ease),
    transform 0.75s var(--ease);
}

.reveal.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}

.hero--landing .reveal:nth-child(1) {
  transition-delay: 0.05s;
}
.hero--landing .reveal:nth-child(2) {
  transition-delay: 0.12s;
}
.hero--landing .reveal:nth-child(3) {
  transition-delay: 0.2s;
}
.hero--landing .reveal:nth-child(4) {
  transition-delay: 0.28s;
}

.home-services {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .home-services {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .home-services {
    grid-template-columns: repeat(3, 1fr);
  }
}

.home-service {
  position: relative;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  box-shadow: var(--shadow-sm);
  transition:
    border-color 0.25s var(--ease),
    box-shadow 0.35s var(--ease),
    transform 0.35s var(--ease);
}

.home-service::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-night), var(--color-accent));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s var(--ease);
}

.home-service:hover {
  border-color: rgba(62, 193, 211, 0.32);
  box-shadow: 0 20px 44px -16px rgba(17, 45, 78, 0.14), 0 0 0 1px rgba(62, 193, 211, 0.12);
  transform: translateY(-6px);
}

.home-service:hover::before {
  transform: scaleX(1);
}

.home-service__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  transition:
    transform 0.35s var(--ease),
    background 0.3s var(--ease),
    color 0.25s,
    box-shadow 0.3s;
}

.home-service:hover .home-service__icon {
  transform: scale(1.06);
  background: rgba(62, 193, 211, 0.22);
  color: var(--color-night);
  box-shadow: 0 6px 16px rgba(62, 193, 211, 0.25);
}

.home-service__icon svg {
  width: 24px;
  height: 24px;
}

.home-service h3 {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 10px;
  color: var(--color-night);
}

.home-service p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
  line-height: 1.58;
}

.section__foot {
  margin-top: 32px;
  text-align: center;
  font-weight: 600;
}

.section__cta {
  margin-top: 32px;
  text-align: center;
}

.home-about {
  display: grid;
  gap: 40px;
  align-items: center;
}

@media (min-width: 860px) {
  .home-about {
    grid-template-columns: 280px 1fr;
    gap: 56px;
  }
}

.home-about__visual {
  text-align: center;
}

@media (min-width: 860px) {
  .home-about__visual {
    text-align: center;
  }
}

.home-about__avatar {
  width: 140px;
  height: 140px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: -0.02em;
  color: var(--color-white);
  background: linear-gradient(145deg, var(--color-accent) 0%, var(--color-night-soft) 45%, var(--color-cyan) 100%);
  box-shadow: 0 20px 50px -15px rgba(62, 193, 211, 0.55);
  animation: avatar-glow 5s ease-in-out infinite;
}

@keyframes avatar-glow {
  0%,
  100% {
    box-shadow: 0 20px 50px -15px rgba(62, 193, 211, 0.5);
  }
  50% {
    box-shadow: 0 24px 56px -12px rgba(34, 211, 238, 0.35);
  }
}

.home-about__role {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
  font-weight: 500;
}

.home-about__content .section__title {
  margin-top: 0;
}

.home-about__lead {
  font-size: 1.0625rem;
  margin: 0 0 16px;
  color: var(--color-text);
}

.home-about__content > p:last-of-type {
  margin: 0 0 24px;
  color: var(--color-muted);
}

.btn--block {
  width: 100%;
  text-align: center;
}

.site-footer .logo--wordmark {
  color: var(--color-white);
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
}

.site-footer .logo--wordmark:hover {
  opacity: 0.85;
  color: var(--color-white);
}

.site-footer .logo--img:hover .logo__img {
  opacity: 0.88;
}

.site-footer__bottom a {
  color: rgba(226, 232, 240, 0.85);
}

.site-footer__bottom a:hover {
  color: var(--color-cyan);
}

@media (prefers-reduced-motion: reduce) {
  .hero__blob,
  .home-about__avatar {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .home-service,
  .home-service::before,
  .home-service__icon {
    transition: none;
  }

  .home-service:hover {
    transform: translateY(-3px);
  }

  .home-service:hover .home-service__icon {
    transform: none;
  }

  .home-service:hover::before {
    transform: scaleX(1);
  }
}

/* ——— Panneau charte graphique (latéral droit) ——— */
.charte-backdrop {
  position: fixed;
  inset: 0;
  z-index: 240;
  background: rgba(17, 45, 78, 0.45);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease), visibility 0.35s;
}

.charte-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
}

.charte-tab {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 241;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  padding: 18px 10px;
  border: none;
  border-radius: 10px 0 0 10px;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-white);
  background: linear-gradient(180deg, var(--color-night) 0%, var(--color-night-soft) 100%);
  box-shadow: -4px 0 20px rgba(17, 45, 78, 0.2);
  cursor: pointer;
  transition: transform 0.25s var(--ease), filter 0.2s;
}

.charte-tab:hover {
  filter: brightness(1.08);
}

.charte-tab.is-active {
  transform: translateY(-50%) translateX(calc(-1 * min(420px, 100vw)));
}

@media (max-width: 640px) {
  .charte-tab {
    top: auto;
    bottom: 0;
    right: 16px;
    left: auto;
    transform: none;
    writing-mode: horizontal-tb;
    border-radius: 10px 10px 0 0;
    padding: 12px 16px;
    letter-spacing: 0.06em;
  }

  .charte-tab.is-active {
    transform: translateY(0);
  }
}

.charte-panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 242;
  width: min(420px, 100vw);
  height: 100vh;
  height: 100dvh;
  background: var(--color-white);
  box-shadow: -12px 0 40px rgba(17, 45, 78, 0.15);
  transform: translateX(100%);
  transition: transform 0.4s var(--ease), visibility 0.4s;
  display: flex;
  flex-direction: column;
  visibility: hidden;
  pointer-events: none;
}

.charte-panel.is-open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
}

.charte-panel:not(.is-open) {
  visibility: hidden;
  pointer-events: none;
}

.charte-panel__inner {
  overflow-y: auto;
  padding: 24px 22px 32px;
  flex: 1;
}

.charte-panel__close {
  position: sticky;
  top: 0;
  float: right;
  z-index: 2;
  width: 40px;
  height: 40px;
  margin: -8px -8px 8px 8px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-night);
  transition: background 0.2s;
}

.charte-panel__close:hover {
  background: var(--color-white);
}

.charte-panel__title {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-night);
  margin: 0 0 24px;
  padding-right: 44px;
  line-height: 1.35;
}

.charte-panel__section {
  margin-bottom: 28px;
}

.charte-panel__section h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-dark);
  margin: 0 0 12px;
}

.charte-swatches {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.charte-swatch {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  font-size: 0.6875rem;
}

.charte-swatch__color {
  height: 52px;
}

.charte-swatch__meta {
  padding: 8px 10px;
  background: var(--color-surface);
  font-weight: 600;
  color: var(--color-text);
  font-family: ui-monospace, monospace;
}

.charte-type-sample {
  border-radius: 12px;
  padding: 14px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-bottom: 10px;
}

.charte-type-sample--title {
  font-family: "Latin Sans", "Source Sans 3", system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--color-night);
}

.charte-type-sample--body {
  font-family: "Latin Sans", "Source Sans 3", system-ui, sans-serif;
  font-weight: 400;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text);
}

.charte-type-note {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin: 0 0 10px;
  line-height: 1.45;
}

.charte-variations {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.charte-variation {
  border-radius: 10px;
  padding: 10px;
  display: grid;
  place-items: center;
  min-height: 72px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.charte-variation--dark {
  background: var(--color-night);
}

.charte-variation img {
  max-height: 36px;
  width: auto;
  object-fit: contain;
}

.charte-variation--mono img {
  filter: grayscale(1) contrast(1.1);
}

.charte-variation--invert img {
  filter: brightness(0) invert(1);
}

.charte-variation--icon {
  padding: 8px;
}

.charte-variation--icon img {
  max-height: 44px;
  border-radius: 12px;
}

.charte-mockups {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.charte-mock {
  border-radius: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-surface);
}

.charte-mock__label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 8px 10px;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
}

.charte-mock__canvas {
  padding: 12px;
}

.charte-mock--card .charte-mock__canvas {
  aspect-ratio: 1.7 / 1;
  background: linear-gradient(145deg, #fff 0%, #e8f6f7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.charte-mock--card .charte-mock__canvas img {
  height: 28px;
  width: auto;
}

.charte-mock--letter .charte-mock__canvas {
  aspect-ratio: 3 / 4;
  background: #fff;
  position: relative;
  padding: 0;
}

.charte-mock--letter .charte-mock__letterhead {
  height: 22%;
  background: linear-gradient(90deg, var(--color-night), var(--color-accent));
  display: flex;
  align-items: center;
  padding: 0 12px;
}

.charte-mock--letter .charte-mock__letterhead img {
  height: 60%;
  max-height: 22px;
  width: auto;
  filter: brightness(0) invert(1);
}

.charte-mock--letter .charte-mock__lines {
  padding: 10px 12px;
}

.charte-mock--letter .charte-mock__lines span {
  display: block;
  height: 4px;
  background: rgba(17, 45, 78, 0.08);
  border-radius: 2px;
  margin-bottom: 6px;
}

.charte-mock--app .charte-mock__canvas {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: linear-gradient(180deg, #e8f6f7, #fff);
}

.charte-mock--app .charte-app-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--color-night);
  display: grid;
  place-items: center;
  box-shadow: 0 8px 20px rgba(17, 45, 78, 0.25);
}

.charte-mock--app .charte-app-icon img {
  width: 36px;
  height: auto;
  border-radius: 8px;
}

body.charte-no-scroll {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .charte-panel,
  .charte-backdrop,
  .charte-tab {
    transition: none;
  }
}