/* Charte graphique Acm-event.fr — Palette Nuit Prune / Or Moderne / Bleu Profond */
:root {
  --color-background: #0a1a2f;
  --color-background-alt: #1b1f2a;
  --color-background-accent: #2b0b3f;
  --color-surface: rgba(31, 36, 48, 0.7);
  --color-primary: #cfa349;
  --color-primary-hover: #e0b968;
  --color-secondary: #2b0b3f;
  --color-tertiary: #0a1a2f;
  --color-neutral-100: #f5f5f7;
  --color-neutral-300: #a8b0bd;
  --color-neutral-500: #6b7381;
  --color-neutral-900: #11131a;
  --color-alert: #d94f70;
  --gradient-hero: linear-gradient(160deg, rgba(11, 12, 24, 0.85) 0%, rgba(43, 11, 63, 0.55) 100%);
  --shadow-lg: 0 24px 60px rgba(10, 26, 47, 0.55);
  --shadow-md: 0 8px 30px rgba(12, 17, 35, 0.35);
  --shadow-soft: 0 8px 24px rgba(12, 17, 35, 0.25);
  --font-heading: "Playfair Display", "Times New Roman", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --transition-fast: 200ms ease-out;
  --container-width: min(1120px, 90vw);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--color-background);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-neutral-100);
  background: radial-gradient(circle at 20% 20%, rgba(43, 11, 63, 0.4), transparent 60%),
    radial-gradient(circle at 80% 0%, rgba(207, 163, 73, 0.2), transparent 55%),
    var(--color-background);
  min-height: 100vh;
}

p,
li {
  color: var(--color-neutral-300);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus {
  color: var(--color-primary);
}

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

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

.alert {
  margin: 0;
  padding: 0.9rem 1.2rem;
  text-align: center;
  font-size: 0.95rem;
  background: rgba(217, 79, 112, 0.18);
  color: var(--color-neutral-100);
  border-bottom: 1px solid rgba(217, 79, 112, 0.28);
}

.alert--error {
  background: rgba(217, 79, 112, 0.28);
}

.section {
  padding: 6rem 0;
}

.section--alt {
  background: rgba(10, 26, 47, 0.65);
}

.section--accent {
  background: rgba(27, 31, 42, 0.85);
}

.section--contact {
  background: rgba(11, 12, 24, 0.85);
  backdrop-filter: blur(12px);
}

.section__heading {
  max-width: 720px;
  margin-bottom: 3rem;
}

.section__heading h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--color-neutral-100);
  margin-bottom: 1rem;
}

.section__heading p {
  margin: 0;
}

.section__eyebrow,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  font-size: 0.75rem;
  color: var(--color-primary);
}

.section__eyebrow::before,
.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: var(--color-primary);
}

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 10;
  background: rgba(10, 18, 31, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(245, 245, 247, 0.05);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.36em;
  font-size: 0.75rem;
}

.brand__mark {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  letter-spacing: 0.1em;
}

.brand__descriptor {
  color: var(--color-neutral-500);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.primary-nav__list {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

.primary-nav__list a {
  font-size: 0.95rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.primary-nav__cta {
  margin-left: 1rem;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.5rem;
  gap: 0.35rem;
  flex-direction: column;
}

.nav-toggle__bar {
  width: 1.75rem;
  height: 2px;
  background: var(--color-neutral-100);
  border-radius: 999px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.85rem 1.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.button--primary {
  background: var(--color-primary);
  color: var(--color-tertiary);
  box-shadow: var(--shadow-soft);
}

.button--primary:hover,
.button--primary:focus {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-tertiary);
}

.button--ghost {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.button--ghost:hover,
.button--ghost:focus {
  background: rgba(207, 163, 73, 0.15);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  padding: clamp(6rem, 12vh, 9rem) 0;
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero), url("../images/club-foule.jpg") center/cover no-repeat;
  opacity: 0.95;
  transform: scale(1.05);
  animation: heroDrift 26s ease-in-out infinite alternate;
}

.hero:hover .hero__background,
.hero:focus-within .hero__background {
  animation-play-state: paused;
  transform: scale(1.12);
  filter: saturate(1.12);
}

.hero__background::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(207, 163, 73, 0.18), transparent 60%),
    radial-gradient(circle at 80% 10%, rgba(43, 11, 63, 0.25), transparent 65%);
  mix-blend-mode: screen;
  opacity: 0;
  transition: opacity 1.2s ease;
}

.hero:hover .hero__background::after,
.hero:focus-within .hero__background::after {
  opacity: 1;
}

@keyframes heroDrift {
  0% {
    transform: scale(1.05) translate3d(0, 0, 0);
    filter: saturate(1);
  }
  50% {
    transform: scale(1.09) translate3d(1.5%, -1%, 0);
    filter: saturate(1.05);
  }
  100% {
    transform: scale(1.12) translate3d(-1%, 1%, 0);
    filter: saturate(1.08);
  }
}

.hero__content {
  position: relative;
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: end;
}

.hero__text h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.35rem, 5vw, 3.8rem);
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-neutral-100);
}

.hero__text p {
  max-width: 540px;
  margin-bottom: 2.25rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__details {
  display: grid;
  gap: 1.5rem;
}

.hero__stat {
  background: rgba(17, 19, 26, 0.45);
  border-radius: 24px;
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(207, 163, 73, 0.2);
}

.hero__stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-primary);
}

.hero__stat-label {
  color: var(--color-neutral-300);
  font-size: 0.95rem;
}

.cards-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: rgba(27, 31, 42, 0.85);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  border-top: 4px solid var(--color-primary);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-top-color var(--transition-fast);
}

.card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle at 25% 25%, rgba(207, 163, 73, 0.28), transparent 65%);
  opacity: 0;
  transition: opacity 260ms ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-10px);
  box-shadow: 0 28px 40px rgba(10, 18, 31, 0.45);
  border-top-color: var(--color-primary-hover);
}

.card:hover::before,
.card:focus-within::before {
  opacity: 1;
}

.card h3,
.card p,
.card ul {
  position: relative;
  z-index: 1;
}

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-neutral-100);
}

.card ul {
  margin: 1.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--color-neutral-300);
}

.highlights-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.highlight {
  background: rgba(17, 19, 26, 0.45);
  padding: 2rem;
  border-radius: 18px;
  border: 1px solid rgba(245, 245, 247, 0.05);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.highlight::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(207, 163, 73, 0.22), transparent 65%);
  opacity: 0;
  transition: opacity 280ms ease;
  pointer-events: none;
}

.highlight:hover,
.highlight:focus-within {
  transform: translateY(-8px);
  border-color: rgba(207, 163, 73, 0.3);
  box-shadow: 0 22px 38px rgba(10, 18, 31, 0.4);
}

.highlight:hover::after,
.highlight:focus-within::after {
  opacity: 1;
}

.gallery-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.gallery-item {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: linear-gradient(140deg, rgba(43, 11, 63, 0.6), rgba(207, 163, 73, 0.2));
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.gallery-item:hover,
.gallery-item:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 24px 45px rgba(10, 26, 47, 0.55);
}

.gallery-item__trigger {
  display: block;
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  width: 100%;
  height: 100%;
  cursor: pointer;
  text-align: left;
}

.gallery-item__trigger:focus-visible {
  outline: 3px solid rgba(207, 163, 73, 0.75);
  outline-offset: 6px;
}

.gallery-item picture {
  display: block;
  position: relative;
  aspect-ratio: 4 / 5;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.05) contrast(0.95);
  transition: transform 400ms ease, filter 400ms ease;
}

.gallery-item:hover img,
.gallery-item:focus-within img {
  transform: scale(1.08);
  filter: saturate(1.1) contrast(1);
}

.gallery-item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 12, 24, 0) 0%, rgba(11, 12, 24, 0.65) 100%);
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.gallery-item:hover::after,
.gallery-item:focus-within::after {
  opacity: 0.85;
}

.gallery-item figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.25rem 1.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neutral-100);
  z-index: 1;
  pointer-events: none;
}

body.has-lightbox {
  overflow: hidden;
}

.lightbox {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 4rem);
  background: rgba(6, 10, 18, 0.82);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 220ms ease, visibility 220ms ease;
  z-index: 999;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__inner {
  position: relative;
  max-width: min(960px, 92vw);
  width: 100%;
  background: rgba(12, 17, 28, 0.96);
  border-radius: 24px;
  box-shadow: 0 28px 60px rgba(5, 8, 16, 0.55);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  display: grid;
  gap: 1.25rem;
}

.lightbox__image {
  width: 100%;
  max-height: min(70vh, 700px);
  object-fit: cover;
  border-radius: 18px;
}

.lightbox__caption {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-neutral-300);
}

.lightbox__close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(245, 245, 247, 0.2);
  background: rgba(6, 10, 18, 0.6);
  color: var(--color-neutral-100);
  font-size: 1.5rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.lightbox__close:hover,
.lightbox__close:focus-visible {
  background: rgba(207, 163, 73, 0.3);
  transform: scale(1.05);
}

.steps {
  counter-reset: steps;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
}

.step {
  background: rgba(27, 31, 42, 0.7);
  border-radius: 18px;
  padding: 2.25rem 2rem;
  border: 1px solid rgba(207, 163, 73, 0.2);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.step::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 18px;
  background: radial-gradient(circle at 25% 25%, rgba(207, 163, 73, 0.22), transparent 70%);
  opacity: 0;
  transition: opacity 280ms ease;
  pointer-events: none;
}

.step:hover,
.step:focus-within {
  transform: translateY(-10px);
  border-color: rgba(207, 163, 73, 0.4);
  box-shadow: 0 28px 44px rgba(10, 18, 31, 0.4);
}

.step:hover::after,
.step:focus-within::after {
  opacity: 1;
}

.step > * {
  position: relative;
  z-index: 1;
}

.step::before {
  counter-increment: steps;
  content: counter(steps, decimal-leading-zero);
  position: absolute;
  top: 1.25rem;
  left: 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: rgba(207, 163, 73, 0.5);
}

.testimonials {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.testimonial {
  background: rgba(11, 12, 24, 0.6);
  padding: 2.5rem 2rem;
  border-radius: 20px;
  border: 1px solid rgba(245, 245, 247, 0.05);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.testimonial::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  background: radial-gradient(circle at 20% 20%, rgba(207, 163, 73, 0.22), transparent 70%);
  opacity: 0;
  transition: opacity 260ms ease;
  pointer-events: none;
}

.testimonial:hover,
.testimonial:focus-within {
  transform: translateY(-10px);
  border-color: rgba(207, 163, 73, 0.32);
  box-shadow: 0 28px 44px rgba(10, 18, 31, 0.45);
}

.testimonial:hover::after,
.testimonial:focus-within::after {
  opacity: 1;
}

.testimonial > * {
  position: relative;
  z-index: 1;
}

.testimonial blockquote {
  margin: 0 0 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-neutral-100);
}

.testimonial::before {
  content: "\201C";
  position: absolute;
  top: 1.2rem;
  left: 1.5rem;
  font-size: 4rem;
  color: rgba(207, 163, 73, 0.3);
}

.testimonial__author {
  margin: 0;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.faq {
  display: grid;
  gap: 1rem;
}

.faq details {
  background: rgba(11, 12, 24, 0.6);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(245, 245, 247, 0.05);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq details:hover,
.faq details:focus-within {
  transform: translateY(-4px);
  border-color: rgba(207, 163, 73, 0.25);
  box-shadow: 0 16px 28px rgba(10, 18, 31, 0.35);
}

.contact {
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: start;
}

.contact__info {
  display: grid;
  gap: 1.5rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.contact__info:hover,
.contact__info:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 20px 36px rgba(10, 18, 31, 0.4);
}

.contact__list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.contact__label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-primary);
}

.contact__list a,
.contact__list address,
.contact__list span {
  font-size: 1rem;
  color: var(--color-neutral-100);
  font-style: normal;
}

.form {
  background: rgba(17, 19, 26, 0.7);
  border-radius: 20px;
  padding: 2.5rem;
  border: 1px solid rgba(205, 205, 220, 0.1);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.form:hover,
.form:focus-within {
  transform: translateY(-6px);
  box-shadow: 0 24px 38px rgba(10, 18, 31, 0.45);
}

.form__field {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.form__field label {
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.75rem;
  color: var(--color-neutral-300);
}

.form__field input,
.form__field textarea {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(43, 11, 63, 0.7);
  border-radius: 14px;
  padding: 0.9rem 1.1rem;
  color: var(--color-neutral-100);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__field input:focus,
.form__field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(207, 163, 73, 0.5);
}

.form__field--hidden {
  position: absolute;
  left: -9999px;
}

.form__status {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  min-height: 1.25rem;
  color: var(--color-neutral-100);
}

.form__status.is-success {
  color: var(--color-primary);
}

.form__status.is-error {
  color: var(--color-alert);
}

.form__notice {
  font-size: 0.75rem;
  color: var(--color-neutral-500);
}

.form .button {
  width: 100%;
}

.site-footer {
  background: rgba(10, 18, 31, 0.95);
  padding: 2.5rem 0;
  border-top: 1px solid rgba(245, 245, 247, 0.05);
}

.site-footer__inner {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  align-items: start;
}

.site-footer__links {
  display: grid;
  gap: 0.75rem;
}

.site-footer__brand p,
.site-footer__credit p {
  margin: 0;
  color: var(--color-neutral-500);
}

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

  .primary-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    padding: 1.5rem;
    background: rgba(10, 18, 31, 0.97);
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .primary-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .primary-nav__list {
    flex-direction: column;
    gap: 1rem;
  }

  .primary-nav__cta {
    margin-left: 0;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 4.5rem 0;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__details {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }

  .card,
  .highlight,
  .testimonial,
  .form,
  .step {
    padding: 2rem 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}