/* ADKsun — page d'accueil */

:root {
  --color-navy: #0b1d36;
  --color-navy-deep: #061221;
  --color-navy-mid: #122a4a;
  --color-navy-elevated: #153155;
  --color-accent: #ffb703;
  --color-accent-hover: #ffc933;
  --color-accent-soft: rgba(255, 183, 3, 0.14);
  --color-text: #eef3f9;
  --color-text-muted: #b4c5d8;
  --color-border: rgba(180, 197, 216, 0.18);
  --color-border-strong: rgba(255, 183, 3, 0.28);
  --font-display: "Palatino Linotype", "Book Antiqua", Palatino, "URW Palladio L", Georgia, serif;
  --font-body: "Segoe UI", "Helvetica Neue", "Nimbus Sans L", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.75rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --max-width: 70rem;
  --content-narrow: 40rem;
  --radius: 0.4rem;
  --header-height: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --focus-ring: 0 0 0 3px var(--color-navy-deep), 0 0 0 5px var(--color-accent);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 0.75rem);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-navy);
  display: flex;
  flex-direction: column;
}

body.is-nav-open {
  overflow: hidden;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 75% 50% at 80% -5%, rgba(255, 183, 3, 0.11), transparent 55%),
    radial-gradient(ellipse 55% 45% at 5% 70%, rgba(20, 75, 130, 0.4), transparent 60%),
    linear-gradient(165deg, var(--color-navy-deep) 0%, var(--color-navy) 48%, #0f2744 100%);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

:focus {
  outline: none;
}

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

.skip-link {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1000;
  padding: 0.65rem 1rem;
  background: var(--color-accent);
  color: var(--color-navy-deep);
  font-weight: 700;
  border-radius: var(--radius);
  transform: translateY(-150%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  text-decoration: none;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
  background: rgba(6, 18, 33, 0.88);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.85rem clamp(1.1rem, 3.5vw, 2.5rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  color: var(--color-accent);
}

.brand__logo {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 0.55rem;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 0.3rem;
}

.nav-toggle__bar {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(0.38rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-0.38rem) rotate(-45deg);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.35rem 0;
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  text-decoration: none;
}

.site-nav__cta {
  white-space: nowrap;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.45rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease),
    border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn:focus-visible {
  box-shadow: var(--focus-ring);
  outline: none;
}

.btn--compact {
  padding: 0.65rem 1.1rem;
  font-size: 0.88rem;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-navy-deep);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent-hover);
  color: var(--color-navy-deep);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Hero */

.hero {
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.1rem, 3.5vw, 2.5rem) clamp(3.5rem, 8vw, 5.5rem);
}

.hero__grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero__content {
  max-width: 36rem;
  opacity: 0;
  transform: translateY(1.1rem);
  animation: rise-in 0.85s var(--ease) 0.1s forwards;
}

.hero__brand {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  line-height: 1.1;
}

.hero__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.5vw, 3.15rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-text);
}

.hero__lead {
  margin: 0 0 var(--space-md);
  color: var(--color-text-muted);
  font-size: clamp(1rem, 2vw, 1.125rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.hero__visual {
  opacity: 0;
  transform: translateY(1.1rem);
  animation: rise-in 0.95s var(--ease) 0.25s forwards;
}

/* CSS solar illustration */

.solar-scene {
  position: relative;
  width: min(100%, 22rem);
  aspect-ratio: 1;
  margin-inline: auto;
  border-radius: 1.25rem;
  overflow: hidden;
  background:
    linear-gradient(180deg, #0a1a30 0%, #123456 55%, #0d243f 100%);
  border: 1px solid var(--color-border);
}

.solar-scene__sky {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 28%, rgba(255, 183, 3, 0.18), transparent 35%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 40%);
}

.solar-scene__sun {
  position: absolute;
  top: 16%;
  right: 18%;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #ffe08a, var(--color-accent) 55%, #d49200);
  box-shadow: 0 0 2.5rem rgba(255, 183, 3, 0.45);
  animation: sun-pulse 5s ease-in-out infinite;
}

.solar-scene__rays {
  position: absolute;
  top: 10%;
  right: 12%;
  width: 5.5rem;
  height: 5.5rem;
  background:
    conic-gradient(from 0deg, transparent 0 12deg, rgba(255, 183, 3, 0.22) 12deg 16deg, transparent 16deg 45deg);
  border-radius: 50%;
  animation: rays-spin 28s linear infinite;
  opacity: 0.7;
}

.solar-scene__base {
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: 14%;
  height: 0.55rem;
  border-radius: 999px;
  background: rgba(238, 243, 249, 0.28);
}

.solar-scene__mast {
  position: absolute;
  left: 50%;
  bottom: 18%;
  width: 0.35rem;
  height: 28%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, #c9d6e6, #7f93ab);
  border-radius: 2px;
}

.solar-scene__panel {
  position: absolute;
  left: 50%;
  bottom: 38%;
  width: 58%;
  aspect-ratio: 16 / 9;
  transform: translateX(-50%) rotate(-18deg);
  transform-origin: 50% 110%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.2rem;
  padding: 0.35rem;
  border-radius: 0.35rem;
  background: #1a3354;
  border: 1px solid rgba(255, 183, 3, 0.45);
  box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.35);
  animation: panel-track 10s ease-in-out infinite;
}

.solar-scene__panel span {
  background: linear-gradient(135deg, #2a4f7a, #1c3a5c 55%, #254868);
  border-radius: 0.12rem;
}

.solar-scene__glow {
  position: absolute;
  left: 20%;
  right: 20%;
  bottom: 8%;
  height: 2.5rem;
  background: radial-gradient(ellipse at center, rgba(255, 183, 3, 0.2), transparent 70%);
}

/* Sections */

.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) clamp(1.1rem, 3.5vw, 2.5rem);
  border-top: 1px solid var(--color-border);
}

.section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section__inner--narrow {
  max-width: var(--content-narrow);
}

.section__eyebrow {
  margin: 0 0 var(--space-xs);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section__title {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

.section__intro {
  margin: 0 0 var(--space-lg);
  max-width: 40rem;
  color: var(--color-text-muted);
}

.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Solution capabilities */

.capability-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
}

.capability {
  padding: 1.15rem 1.2rem 1.2rem;
  border-left: 3px solid var(--color-accent);
  background: linear-gradient(90deg, rgba(255, 183, 3, 0.07), transparent 70%);
}

.capability--wide {
  grid-column: 1 / -1;
}

.capability__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
}

.capability__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

/* Feature cards */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
}

.feature-card {
  padding: 1.35rem 1.25rem 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(21, 49, 85, 0.35);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.feature-card:hover,
.feature-card:focus-within {
  border-color: var(--color-border-strong);
  background: rgba(21, 49, 85, 0.55);
}

.feature-card__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-accent);
}

.feature-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.97rem;
}

/* Project */

.project {
  background: linear-gradient(180deg, transparent, rgba(6, 18, 33, 0.45));
}

.project__text {
  margin: 0 0 var(--space-sm);
  color: var(--color-text-muted);
}

.project__note {
  margin: var(--space-md) 0 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  background: var(--color-accent-soft);
  color: var(--color-text);
  font-size: 0.98rem;
}

/* Contact */

.contact-notice {
  margin: 0 0 var(--space-md);
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border-strong);
  background: rgba(255, 183, 3, 0.1);
  color: var(--color-text);
}

.contact-notice p {
  margin: 0;
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.form-field {
  display: grid;
  gap: 0.4rem;
}

.form-field__label {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--color-text);
}

.form-field__input {
  width: 100%;
  padding: 0.8rem 0.9rem;
  font: inherit;
  color: var(--color-text);
  background: rgba(6, 18, 33, 0.65);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.form-field__input::placeholder {
  color: rgba(180, 197, 216, 0.55);
}

.form-field__input:hover {
  border-color: rgba(255, 183, 3, 0.4);
}

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

.form-field__input--area {
  resize: vertical;
  min-height: 8rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.form-feedback {
  margin: 0;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  background: rgba(21, 49, 85, 0.7);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.form-feedback[hidden] {
  display: none;
}

/* Footer */

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: rgba(6, 18, 33, 0.72);
  padding: var(--space-lg) clamp(1.1rem, 3.5vw, 2.5rem);
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: 1.25rem;
}

.site-footer__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-footer__tagline {
  margin: 0.25rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.35rem;
}

.site-footer__nav a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible {
  color: var(--color-accent);
  text-decoration: none;
}

.site-footer__copy {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Motion */

@keyframes rise-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sun-pulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 2.5rem rgba(255, 183, 3, 0.4);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 0 3.25rem rgba(255, 183, 3, 0.55);
  }
}

@keyframes rays-spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes panel-track {
  0%,
  100% {
    transform: translateX(-50%) rotate(-22deg);
  }
  50% {
    transform: translateX(-50%) rotate(10deg);
  }
}

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

  .hero__content,
  .hero__visual,
  .reveal {
    animation: none;
    transition: none;
    opacity: 1;
    transform: none;
  }

  .solar-scene__sun,
  .solar-scene__rays,
  .solar-scene__panel {
    animation: none;
  }

  .btn:hover,
  .btn:focus-visible {
    transform: none;
  }
}

/* Responsive — tablet */

@media (max-width: 960px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }

  .hero__visual {
    order: -1;
    max-width: 20rem;
    margin-inline: auto;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Responsive — mobile nav & layout */

@media (max-width: 800px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
    padding: 1.25rem clamp(1.1rem, 3.5vw, 2.5rem) 1.75rem;
    background: rgba(6, 18, 33, 0.97);
    border-bottom: 1px solid var(--color-border);
    max-height: calc(100svh - var(--header-height));
    overflow-y: auto;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }

  .site-nav__link {
    display: block;
    padding: 0.85rem 0.25rem;
    font-size: 1.05rem;
    border-bottom: 1px solid rgba(180, 197, 216, 0.1);
  }

  .site-nav__cta {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .capability-list,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .capability--wide {
    grid-column: auto;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .form-actions .btn {
    width: 100%;
  }
}