/* ========================================
   Africa Tech Summit 2026 - Design System
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700;800&display=swap');

/* === CSS Custom Properties === */
:root {
  /* Core Palette — Deep Navy + Emerald inspired by MCT West Africa */
  --color-background: #f8fafb;
  --color-surface: #f0f4f8;
  --color-card: #ffffff;
  --color-muted: #e8f0f7;
  --color-border: rgba(15, 40, 80, 0.10);
  --color-border-hover: rgba(15, 40, 80, 0.22);

  /* Primary — Deep Navy */
  --color-primary: #0f2850;
  --color-primary-hover: #0a1e3c;
  --color-primary-light: rgba(15, 40, 80, 0.08);
  --color-primary-fg: #ffffff;

  /* Accent — Emerald/Teal */
  --color-accent: #0ea472;
  --color-accent-hover: #0b8a5e;
  --color-accent-light: rgba(14, 164, 114, 0.12);
  --color-accent-fg: #ffffff;

  /* Gold highlight */
  --color-gold: #f59e0b;
  --color-gold-light: rgba(245, 158, 11, 0.12);

  /* Text */
  --color-text: #0d1b2e;
  --color-text-secondary: #4a5f7a;
  --color-text-muted: rgba(13, 27, 46, 0.45);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --container-max: 1200px;
  --container-padding: 1rem;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 40, 80, 0.08);
  --shadow-md: 0 4px 12px rgba(15, 40, 80, 0.10);
  --shadow-lg: 0 10px 30px rgba(15, 40, 80, 0.12);
  --shadow-xl: 0 20px 40px rgba(15, 40, 80, 0.15);
  --shadow-accent: 0 8px 24px rgba(14, 164, 114, 0.25);

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.75rem;
}

/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  padding-top: 4.25rem;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* === Container === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 40, 80, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.navbar.is-scrolled {
  background: rgba(15, 40, 80, 0.99);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
  gap: 1rem;
}

.navbar__brand {
  display: flex;
  align-items: center;
 
  flex-shrink: 0;
}

.navbar__logo {
  display: grid;
  place-items: center;
  width: 6.375rem;
  height: 6.375rem;
}

.navbar__nav {
  display: none;
  align-items: center;
  gap: 1.5rem;
}

.navbar__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.navbar__link:hover { color: var(--color-accent); }

.navbar__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.9);
  cursor: pointer;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.navbar__toggle:hover { background: rgba(255,255,255,0.15); }

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.navbar__register {
  display: none;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  padding: 0.5rem 1.25rem;
}

/* === Mobile Menu === */
.mobile-menu {
  display: none;
  position: fixed;
  top: 4.25rem;
  left: 0;
  right: 0;
  background: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
  z-index: 99;
  padding: 1.25rem;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-menu.is-open { display: flex; }

.mobile-menu__link {
  display: block;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.8);
  font-weight: 500;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.mobile-menu__link:hover {
  background: rgba(255,255,255,0.08);
  color: var(--color-accent);
}

.mobile-menu .btn--accent { margin-top: 0.75rem; width: 100%; justify-content: center; }

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  white-space: nowrap;
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.625rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--accent {
  background: var(--color-accent);
  color: #ffffff;
  padding: 0.625rem 1.5rem;
  box-shadow: var(--shadow-accent);
}

.btn--accent:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(14,164,114,0.35);
}

.btn--outline-light {
  background: transparent;
  color: rgba(255,255,255,0.9);
  border: 1.5px solid rgba(255,255,255,0.35);
  padding: 0.625rem 1.5rem;
}

.btn--outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-primary);
  font-weight: 700;
  padding: 0.625rem 1.5rem;
}

.btn--gold:hover {
  background: #e08e00;
  transform: translateY(-1px);
}

.btn--lg {
  height: 3.125rem;
  padding: 0 2rem;
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
}

.btn--full { width: 100%; }

/* === HERO CAROUSEL === */
.hero {
  position: relative;
  overflow: hidden;
  height: 100svh;
  min-height: 580px;
  max-height: 900px;
  background: var(--color-primary);
}

.hero__slides {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
  pointer-events: none;
}

.hero__slide.is-active {
  opacity: 1;
  pointer-events: auto;
}
/* Zoom lent sur l'image active */
.hero__slide-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;

  transform: scale(1);
  transition: opacity 1s ease;
}

/* Animation uniquement sur la slide active */
.hero__slide.is-active .hero__slide-bg {
  animation: heroZoom 10s linear forwards;
}

@keyframes heroZoom {
  from {
    transform: scale(1) translate(0, 0);
  }
  to {
    transform: scale(1.15) translate(-2%, -1%);
  }
}


.hero__slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(15, 40, 80, 0.88) 0%,
    rgba(15, 40, 80, 0.65) 55%,
    rgba(14, 164, 114, 0.25) 100%
  );
}

.hero__slide-content {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(14, 164, 114, 0.18);
  border: 1px solid rgba(14, 164, 114, 0.4);
  color: #4de8b8;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.375rem 0.875rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero__tag-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse 2s infinite;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5.5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: #ffffff;
  max-width: 800px;
}

.hero__title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero__subtitle {
  margin-top: 0.875rem;
  font-size: clamp(1rem, 2.5vw, 1.375rem);
  color: rgba(255,255,255,0.75);
  font-weight: 400;
  max-width: 560px;
  line-height: 1.55;
}

.hero__meta {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.65);
  font-weight: 500;
}

.hero__meta-item svg { color: var(--color-accent); flex-shrink: 0; }

.hero__actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
}

/* Carousel Controls */
.hero__controls {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.625rem;
  z-index: 10;
}

.hero__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.35);
  cursor: pointer;
  transition: all var(--transition-base);
  border: none;
  padding: 0;
}

.hero__dot.is-active {
  width: 1.75rem;
  background: var(--color-accent);
}

.hero__nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.hero__nav-btn:hover {
  background: rgba(14,164,114,0.4);
  border-color: var(--color-accent);
}

.hero__nav-btn--prev { left: 1rem; }
.hero__nav-btn--next { right: 1rem; }

/* === Countdown === */
.countdown {
  background: var(--color-primary);
  padding: 3rem 0;
  border-bottom: 1px solid rgba(14,164,114,0.2);
}

.countdown__label {
  text-align: center;
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.countdown__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  max-width: 36rem;
  margin: 0 auto;
}

.countdown__item {
  text-align: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(14,164,114,0.2);
  border-radius: var(--radius-xl);
  padding: 1.25rem 0.5rem;
}

.countdown__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  line-height: 1.0;
}

.countdown__unit {
  margin-top: 0.375rem;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
}

/* === Section Utilities === */
.section { padding: 5.5rem 0; }
.section--muted { background: var(--color-muted); }
.section--dark {
  background: var(--color-primary);
  color: #ffffff;
}
.section--dark .section__title { color: #ffffff; }
.section--dark .section__desc { color: rgba(255,255,255,0.65); }

.section__label {
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  text-transform: uppercase;
  font-weight: 700;
}

.section__title {
  margin-top: 0.625rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 4vw, 3rem);
  letter-spacing: -0.025em;
  color: var(--color-text);
  line-height: 1.1;
}

.section__title--highlight { color: var(--color-accent); }
.section__title--gold { color: var(--color-gold); }

.section__desc {
  margin-top: 1.25rem;
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 46rem;
  line-height: 1.75;
}

/* === Stats === */
.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 3rem;
}

.stat-card {
  border-radius: var(--radius-xl);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
}

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

.stat-card__value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.85rem;
  color: var(--color-primary);
  line-height: 1;
}

.stat-card__label {
  margin-top: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

/* === About Section Image === */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  margin-top: 1rem;
}

.about-visual {
  border-radius: 0;
  overflow: hidden;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.about-visual-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: var(--color-surface);
}

/* === Highlights Cards === */
.highlights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 3rem;
}

.highlight-card {
  border-radius: var(--radius-xl);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.highlight-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.highlight-card:hover {
  border-color: rgba(14,164,114,0.3);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.highlight-card:hover::after { transform: scaleX(1); }

.highlight-card__img {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--color-muted), var(--color-surface));
  display: flex;
  align-items: center;
  justify-content: center;
}

.highlight-card__img img { width: 100%; height: 100%; object-fit: cover; }

.highlight-card__icon {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  background: var(--color-accent-light);
  color: var(--color-accent);
  transition: all var(--transition-base);
  margin-bottom: 1.25rem;
}

.highlight-card:hover .highlight-card__icon {
  background: var(--color-accent);
  color: #ffffff;
}

.highlight-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.highlight-card__desc {
  margin-top: 0.5rem;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* === Partners / Sponsor Banner === */
.partners {
  background: var(--color-primary-fg);
  padding: 2.5rem 0;
  overflow: hidden;
}

.partners__label {
  text-align: center;
  font-size: 0.8875rem;
  letter-spacing: 0.25em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

.partners__track {
    display: flex;
    align-items: center;
    gap: 4rem;
    width: max-content;
    animation: marquee 30s linear infinite;
}

.partners__item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.partners__item img {
    height: 90px;      /* ajuste selon le rendu */
    width: auto;
    max-width: 220px;
    object-fit: contain;
    opacity: 0.85;
    transition: all .3s ease;
}

.partners__item img:hover {
    transform: scale(1.05);
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* === Speakers Grid === */
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}

.speaker-card {
  border-radius: 50%;
  border: none;
  background: transparent;
  overflow: visible;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  max-width: 120px;
  margin: 0 auto;
}

.speaker-card:hover {
  transform: scale(1.05);
}

.speaker-card__avatar {
  aspect-ratio: 1;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a4a8a 50%, var(--color-accent) 100%);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.speaker-card__avatar:hover {
  box-shadow: var(--shadow-lg);
}

.speaker-card__avatar-img {
  width: 60%;
  height: 60%;
  object-fit: contain;
}

.speaker-card__initials {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 4rem);
  color: #ffffff;
  position: relative;
  z-index: 1;
}

.speaker-card__info {
  padding: 0;
  text-align: center;
}

.speaker-card__name {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.speaker-card__role {
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-accent);
  font-weight: 500;
}

.speaker-card__country {
  margin-top: 0;
  font-size: 0.6875rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
}

/* === Gallery === */
.gallery {
  padding: 4.5rem 0;
  background: var(--color-surface);
}

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem;
  margin-top: 2.5rem;
}

.gallery__item {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-primary);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
  cursor: pointer;
}

.gallery__item:hover { transform: scale(1.02); }
.gallery__item:first-child { grid-column: 1 / -1; aspect-ratio: 16/7; }
.gallery__item svg { width: 100%; height: 100%; }

/* === Schedule === */
.schedule-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 0.5rem;
}

.schedule-grid > .schedule-day {
  scroll-snap-align: start;
}

.schedule-day {
  border-radius: var(--radius-xl);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  min-width: 280px;
}

.schedule-day::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-accent), var(--color-primary));
}

.schedule-day__header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-primary);
  font-weight: 700;
  padding-left: 0.5rem;
}

.schedule-day__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.schedule-day__list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.schedule-item {
  display: flex;
  gap: 1rem;
  padding-bottom: 0.875rem;
  border-bottom: 1px dashed rgba(14,164,114,0.2);
}

.schedule-item:last-child { border-bottom: none; padding-bottom: 0; }

.schedule-item__time {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--color-accent);
  width: 4.25rem;
  flex-shrink: 0;
  font-size: 0.8125rem;
  padding-top: 0.1rem;
}


.schedule-item__title {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.3;
}

.schedule-item__desc {
  margin-top: 0.2rem;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
}

.schedule-item__badge {
  display: inline-block;
  padding: 0.175rem 0.625rem;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.375rem;
}

.badge--keynote { background: rgba(15,40,80,0.08); color: var(--color-primary); }
.badge--workshop { background: rgba(14,164,114,0.12); color: var(--color-accent); }
.badge--panel { background: rgba(245,158,11,0.12); color: #b45309; }
.badge--hackathon { background: rgba(99,102,241,0.1); color: #4f46e5; }
.badge--networking { background: rgba(236,72,153,0.1); color: #be185d; }
.badge--certification { background: rgba(14,164,114,0.12); color: var(--color-accent); }
.badge--closing { background: rgba(15,40,80,0.08); color: var(--color-primary); }

/* === FAQ === */
.faq { margin-top: 3rem; }

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.25rem 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  gap: 1rem;
  transition: color var(--transition-fast);
}

.faq__question:hover { color: var(--color-accent); }

.faq__icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: grid;
  place-items: center;
  background: var(--color-accent-light);
  border-radius: 50%;
  color: var(--color-accent);
  transition: all var(--transition-base);
}

.faq__item.is-open .faq__icon {
  background: var(--color-accent);
  color: white;
  transform: rotate(45deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
}

.faq__answer-inner {
  padding-bottom: 1.25rem;
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* === Registration === */
.register-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

.register__benefits-list {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.register__benefit {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
}

.register__check {
  margin-top: 0.1rem;
  display: grid;
  place-items: center;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  background: var(--color-accent);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 700;
  flex-shrink: 0;
}

.ticket-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
  margin-top: 1.75rem;
}

.ticket-card {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  background: var(--color-card);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.ticket-card:hover, .ticket-card.is-selected {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.ticket-card__dot {
  width: 1.125rem;
  height: 1.125rem;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.ticket-card.is-selected .ticket-card__dot {
  background: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.ticket-card__info { flex: 1; }
.ticket-card__name { font-weight: 700; font-size: 0.9375rem; color: var(--color-text); }
.ticket-card__desc { font-size: 0.8125rem; color: var(--color-text-secondary); margin-top: 0.125rem; }
.ticket-card__price { font-family: var(--font-display); font-weight: 800; color: var(--color-accent); font-size: 1rem; }

/* === Form === */
.form {
  border-radius: var(--radius-2xl);
  background: var(--color-card);
  padding: 1.75rem;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

.form__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 1.125rem;
}

.form__label {
  font-weight: 600;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  height: 2.75rem;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(15,40,80,0.15);
  background: var(--color-background);
  padding: 0 0.875rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(14, 164, 114, 0.12);
}

.form__input::placeholder,
.form__textarea::placeholder { color: var(--color-text-muted); }

.form__select {
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%234a5f7a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m4 6 4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  background-size: 1rem;
  padding-right: 2.5rem;
}

.form__textarea {
  height: auto;
  min-height: 5rem;
  padding: 0.75rem 0.875rem;
  resize: vertical;
}

/* === Footer — single row === */
.footer {
  background: #08152a;
  color: #e8f0fb;
}

.footer__single {
  padding: 2rem 0;
}

.footer__single-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.footer__brand-block {
  text-align: center;
}

.footer__brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  justify-content: center;
}

.footer__desc {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: rgba(232,240,251,0.5);
  line-height: 1.6;
  max-width: 28rem;
}

.footer__right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer__social {
  display: flex;
  gap: 0.625rem;
}

.footer__social-link {
  display: grid;
  place-items: center;
  width: 2.125rem;
  height: 2.125rem;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.5);
  transition: all var(--transition-fast);
}

.footer__social-link:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.footer__copy {
  font-size: 0.75rem;
  color: rgba(232,240,251,0.35);
  white-space: nowrap;
}

/* === Animations === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(1.5rem); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-2rem); }
  to { opacity: 1; transform: translateX(0); }
}

.animate-fade-in-up {
  animation: fadeInUp 0.65s var(--transition-smooth) both;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.22s; }
.animate-delay-3 { animation-delay: 0.36s; }
.animate-delay-4 { animation-delay: 0.5s; }

/* === Flash Messages === */
.flash-messages {
  position: fixed;
  top: 5rem;
  right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 22rem;
}

.flash {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  animation: fadeInUp 0.4s ease both;
  box-shadow: var(--shadow-lg);
}

.flash--success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }
.flash--error { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }

/* === Misc === */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  margin: 0;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--color-background); }
::-webkit-scrollbar-thumb { background: rgba(15,40,80,0.2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

::selection { background: rgba(14,164,114,0.2); color: var(--color-text); }

/* === Responsive Breakpoints === */
@media (min-width: 640px) {
  :root { --container-padding: 1.5rem; }
  .stats { grid-template-columns: repeat(3, 1fr); }
  .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .form__row { grid-template-columns: repeat(2, 1fr); }
  .form { padding: 2.25rem; }
  .navbar__brand-text { display: inline; }
  .ticket-cards { grid-template-columns: repeat(3, 1fr); }
  .gallery__grid { grid-template-columns: repeat(3, 1fr); }
  .gallery__item:first-child { grid-column: 1 / -1; }
  .footer__single-inner { flex-direction: row; justify-content: space-between; align-items: center; }
  .footer__brand-block { text-align: left; }
  .footer__brand-name { justify-content: flex-start; }
  .footer__right { justify-content: flex-end; }
}

@media (min-width: 768px) {
  .navbar__nav { display: flex; }
  .navbar__register { display: inline-flex; }
  .navbar__toggle { display: none; }
  .section { padding: 7rem 0; }
  .about-grid { grid-template-columns: 1fr 1fr; }
  .speakers-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .highlights-grid { grid-template-columns: repeat(3, 1fr); }
  .speakers-grid { grid-template-columns: repeat(4, 1fr); }
  .schedule-grid { grid-template-columns: 1fr; }
  .register-grid { grid-template-columns: 1fr 1fr; gap: 4.5rem; }
  .gallery__grid { grid-template-columns: repeat(4, 1fr); }
  .gallery__item:first-child { grid-column: 1 / 3; }
  .hero__nav-btn--prev { left: 2rem; }
  .hero__nav-btn--next { right: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, .hero__slide { transition: none !important; animation: none !important; }
}

/* === Language Switcher === */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.lang-switcher__btn {
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  padding: 0.25rem 0.375rem;
  border-radius: 4px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.lang-switcher__btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.lang-switcher__btn.is-active {
  color: #ffffff;
  background: rgba(14, 164, 114, 0.25);
}

.lang-switcher__sep {
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.65rem;
}

.mobile-menu__lang {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin: 0.25rem 0;
}