:root {
  --silver-light: #e8eaed;
  --silver-mid: #c8ccd2;
  --silver-dark: #a8adb5;
  --silver-gradient: linear-gradient(165deg, #f0f2f5 0%, #d4d8de 45%, #b8bcc4 100%);
  --black: #0a0a0a;
  --black-soft: #1a1a1a;
  --accent-line: rgba(10, 10, 10, 0.12);
  --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.04);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Inter", system-ui, sans-serif;
  color: var(--black);
  background: var(--silver-gradient);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

.container { max-width: 960px; margin: 0 auto; padding: 0 2rem; }
.container-wide { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(232, 234, 237, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--accent-line);
  box-shadow: var(--shadow-nav);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--black);
}

.logo-img {
  flex-shrink: 0;
  height: 52px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-text { display: flex; flex-direction: column; line-height: 1.2; }

.logo-cabinet {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  opacity: 0.65;
}

.logo-name {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.35rem;
  font-weight: 700;
}

.header-right { display: flex; align-items: center; gap: 2rem; }

.nav { display: flex; align-items: center; gap: 0.1rem; }

.nav a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--black-soft);
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.nav a:hover, .nav a.active {
  background: rgba(10, 10, 10, 0.06);
  color: var(--black);
}

.lang-switch {
  display: flex;
  border: 1px solid var(--accent-line);
  border-radius: 6px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.35);
  flex-shrink: 0;
}

.lang-switch button {
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.4rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--black-soft);
  cursor: pointer;
}

.lang-switch button.active {
  background: var(--black);
  color: var(--silver-light);
}

.lang-divider { width: 1px; background: var(--accent-line); }

.hero {
  padding: 4.5rem 0 4rem;
  text-align: center;
}

.hero-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.hero-logo {
  width: auto;
  height: clamp(120px, 22vw, 180px);
  max-width: min(280px, 85vw);
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.06));
}

.hero-cabinet {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.6;
}

.hero h1 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 600;
  line-height: 1.3;
  max-width: 820px;
  margin: 0 auto;
}

.hero-sub {
  font-size: 1rem;
  color: var(--black-soft);
  max-width: 700px;
  margin: 1.25rem auto 0;
  opacity: 0.88;
}

.page-main { padding: 3.5rem 0 4rem; }

.section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.55;
  margin-bottom: 0.75rem;
}

.page-main h1,
.page-main h2 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: clamp(1.6rem, 3.5vw, 2rem);
  font-weight: 600;
  margin-bottom: 1.5rem;
  line-height: 1.25;
}

.prose p {
  font-size: 0.95rem;
  color: var(--black-soft);
  margin-bottom: 1.1rem;
  text-align: justify;
}

.prose p:last-child { margin-bottom: 0; }

.presentation-block { margin-top: 2rem; }

.presentation-block .section-label { margin-bottom: 0.5rem; }

.presentation-block h3 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: clamp(1.35rem, 3vw, 1.65rem);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.domains { display: grid; gap: 1.25rem; }

.domain-card {
  background: rgba(255, 255, 255, 0.28);
  border: 1px solid var(--accent-line);
  border-radius: 8px;
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-soft);
  transition: transform 0.25s, box-shadow 0.25s;
}

.domain-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
}

.domain-card h4 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.domain-card h4::before {
  content: "•";
  font-family: "Inter", sans-serif;
  font-size: 1.4rem;
  line-height: 1;
  opacity: 0.4;
  flex-shrink: 0;
}

.domain-card p {
  font-size: 0.9rem;
  color: var(--black-soft);
  opacity: 0.88;
  padding-left: 1.5rem;
}

.panel {
  background: rgba(255, 255, 255, 0.28);
  border: 1px solid var(--accent-line);
  border-radius: 8px;
  padding: 2rem 2.25rem;
  box-shadow: var(--shadow-soft);
}

.panel p { font-size: 0.95rem; color: var(--black-soft); }

.booking-box { text-align: center; padding: 2.5rem 2rem; }

.booking-box p {
  margin-bottom: 1.5rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.selection-recap {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: rgba(10, 10, 10, 0.04);
  border-radius: 6px;
  font-size: 0.88rem;
  text-align: left;
}

.selection-recap ul { list-style: none; margin-top: 0.5rem; }

.selection-recap li { padding: 0.25rem 0; color: var(--black-soft); }

.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.85rem 1.65rem;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  border: 2px solid var(--black);
}

.btn-primary { background: var(--black); color: var(--silver-light); }

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.btn-outline { background: transparent; color: var(--black); }

.btn-outline:hover {
  background: rgba(10, 10, 10, 0.06);
  transform: translateY(-2px);
}

.cta-row {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.78rem;
  color: var(--black-soft);
  opacity: 0.55;
  border-top: 1px solid var(--accent-line);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--black);
}

.catalog-intro {
  font-size: 0.95rem;
  color: var(--black-soft);
  opacity: 0.88;
  margin-bottom: 2rem;
  max-width: 720px;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 1.5rem;
  align-items: start;
}

.catalog-part-a {
  background: rgba(255, 255, 255, 0.35);
  border: 2px solid var(--accent-line);
  border-radius: 10px;
  padding: 1.75rem;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  position: sticky;
  top: 5.5rem;
}

.catalog-part-a:hover { border-color: rgba(10, 10, 10, 0.25); box-shadow: var(--shadow-soft); }

.catalog-part-a.selected {
  border-color: var(--black);
  box-shadow: 0 6px 28px rgba(0, 0, 0, 0.1);
}

.part-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--black);
  color: var(--silver-light);
  border-radius: 6px;
  margin-bottom: 1rem;
}

.catalog-part-a h3 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

.catalog-duration {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  background: rgba(10, 10, 10, 0.08);
  border-radius: 4px;
  margin-bottom: 1rem;
}

.catalog-part-a p {
  font-size: 0.88rem;
  color: var(--black-soft);
  margin-bottom: 1.25rem;
}

.catalog-part-a .btn-select {
  width: 100%;
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.75rem;
  border: 2px solid var(--black);
  background: transparent;
  color: var(--black);
  border-radius: 4px;
  cursor: pointer;
}

.catalog-part-a.selected .btn-select,
.catalog-part-a .btn-select:hover {
  background: var(--black);
  color: var(--silver-light);
}

.catalog-part-b h3 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.part-b-sub {
  font-size: 0.82rem;
  color: var(--black-soft);
  opacity: 0.75;
  margin-bottom: 1rem;
}

.module-list { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }

.module-item {
  display: flex;
  align-items: stretch;
  background: rgba(255, 255, 255, 0.28);
  border: 1px solid var(--accent-line);
  border-radius: 6px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.module-item:hover:not(.included) { border-color: rgba(10, 10, 10, 0.22); }

.module-item.selected {
  border-color: var(--black);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.module-item.included { opacity: 0.55; pointer-events: none; }

.module-num {
  flex-shrink: 0;
  width: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  background: rgba(10, 10, 10, 0.06);
}

.module-btn {
  flex: 1;
  text-align: left;
  padding: 0.85rem 1rem;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.82rem;
  color: var(--black);
  cursor: pointer;
  line-height: 1.45;
}

.module-hours {
  flex-shrink: 0;
  align-self: center;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  margin-right: 0.75rem;
  background: rgba(10, 10, 10, 0.07);
  border-radius: 4px;
}

.catalog-summary {
  margin-top: 2rem;
  padding: 1.75rem 2rem;
  background: rgba(255, 255, 255, 0.32);
  border: 1px solid var(--accent-line);
  border-radius: 10px;
  box-shadow: var(--shadow-soft);
}

.catalog-summary h4 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.summary-list { list-style: none; margin-bottom: 1.25rem; }

.summary-list li {
  font-size: 0.88rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--accent-line);
  color: var(--black-soft);
}

.summary-empty {
  font-size: 0.88rem;
  color: var(--black-soft);
  opacity: 0.6;
  font-style: italic;
}

.checkout-error {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: #8b1a1a;
}

.payment-notice {
  margin-bottom: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  font-size: 0.88rem;
  background: rgba(10, 10, 10, 0.06);
}

.payment-notice--warn {
  background: rgba(139, 26, 26, 0.08);
  color: #6b1515;
}

.payment-notice--success {
  background: rgba(20, 80, 40, 0.1);
  color: #145028;
}

#summaryCta:disabled {
  opacity: 0.65;
  cursor: wait;
}

.formation-steps-title {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
}

.formation-steps {
  margin-left: 1.25rem;
  font-size: 0.92rem;
  color: var(--black-soft);
}

.formation-steps li { margin-bottom: 0.6rem; }

@media (max-width: 960px) {
  .header-inner { flex-wrap: wrap; padding: 0.85rem 1.25rem; }
  .header-right { width: 100%; justify-content: space-between; position: relative; }
  .menu-toggle { display: flex; }
  .nav {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(232, 234, 237, 0.97);
    backdrop-filter: blur(12px);
    padding: 0.75rem;
    border: 1px solid var(--accent-line);
    border-radius: 8px;
    box-shadow: var(--shadow-nav);
    z-index: 10;
  }
  .nav.open { display: flex; }
  .nav a { width: 100%; text-align: center; padding: 0.7rem; }
  .prose p { text-align: left; }
}

@media (max-width: 860px) {
  .catalog-layout { grid-template-columns: 1fr; }
  .catalog-part-a { position: static; }
}