/* ═══════════════════════════════════════════════════════════════════════════
   IMMERSA LANDING — Components (buttons, cards, nav, forms, modals)
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Buttons ─────────────────────────────────────────────────────────── */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--c-text);
  --btn-border: var(--c-border);
  --btn-hover-bg: var(--c-surface-2);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  min-height: 48px;
  padding-inline: 1.5rem;
  padding-block: 0.85rem;
  border-radius: var(--r-md);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-border);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  text-align: center;
  transition: transform var(--dur-fast) var(--ease-out),
              background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  user-select: none;
}
.btn:hover {
  background: var(--btn-hover-bg);
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}
.btn:focus-visible {
  box-shadow: var(--focus-ring);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn--primary {
  --btn-bg: var(--c-accent);
  --btn-fg: #111;
  --btn-border: var(--c-accent);
  --btn-hover-bg: var(--c-accent-hi);
}
.btn--primary:hover {
  box-shadow: 0 8px 24px rgba(200, 169, 106, 0.3);
}

.btn--secondary {
  --btn-bg: transparent;
  --btn-fg: var(--c-text);
  --btn-border: var(--c-border-strong);
  --btn-hover-bg: var(--c-surface-2);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--c-accent);
  --btn-border: transparent;
  --btn-hover-bg: var(--c-accent-soft);
  padding-inline: 0.5rem;
}
.btn--ghost:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.btn--dark {
  --btn-bg: #111;
  --btn-fg: #fff;
  --btn-border: #111;
  --btn-hover-bg: #000;
}

.btn--outline-dark {
  --btn-bg: transparent;
  --btn-fg: #111;
  --btn-border: #111;
  --btn-hover-bg: rgba(0, 0, 0, 0.08);
}

.btn--lg {
  min-height: 56px;
  padding-inline: 2rem;
  font-size: 1.0625rem;
}

.btn--sm {
  min-height: 36px;
  padding-inline: 1rem;
  padding-block: 0.5rem;
  font-size: 0.875rem;
}

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

/* Arrow suffix — reverses in RTL */
.btn .arr {
  display: inline-block;
  transition: transform var(--dur-fast);
}
html[dir="rtl"] .btn .arr { transform: scaleX(-1); }
.btn:hover .arr { transform: translateX(4px); }
html[dir="rtl"] .btn:hover .arr { transform: scaleX(-1) translateX(4px); }

/* ─── Cards ────────────────────────────────────────────────────────────── */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-lg);
  padding: var(--s-5);
  transition: border-color var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.card--interactive:hover {
  border-color: var(--c-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.card--accent {
  border-color: rgba(200, 169, 106, 0.35);
  background: linear-gradient(180deg, var(--c-surface) 0%, rgba(200, 169, 106, 0.04) 100%);
}
.card--flat {
  background: transparent;
  border: 1px solid var(--c-border-soft);
  padding: var(--s-5);
  border-radius: var(--r-lg);
}

/* Ribbon for featured cards */
.ribbon {
  position: absolute;
  inset-block-start: -1px;
  inset-inline-end: 1.5rem;
  background: var(--c-accent);
  color: #111;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.75rem;
  border-end-end-radius: var(--r-sm);
  border-end-start-radius: var(--r-sm);
  text-transform: uppercase;
}

/* ─── Nav (sticky header) ──────────────────────────────────────────────── */
:root { --topbar-h: 72px; }

.topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(11, 15, 20, 0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  transition: background var(--dur-base) var(--ease-out),
              backdrop-filter var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.topbar.is-scrolled {
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom-color: var(--c-border-soft);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  height: var(--topbar-h);
}
.topbar__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  color: var(--c-text);
}
.topbar__brand .logo-mark {
  width: 28px;
  height: 28px;
  display: inline-block;
}
.topbar__nav {
  display: none;
  gap: var(--s-5);
  flex: 1;
  justify-content: center;
}
@media (min-width: 900px) {
  .topbar__nav { display: flex; }
}
.topbar__nav a {
  position: relative;
  color: var(--c-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 0.35rem 0;
  transition: color var(--dur-fast);
}
.topbar__nav a:hover {
  color: var(--c-text);
}
.topbar__nav a.active {
  color: var(--c-accent);
}
.topbar__nav a.active::after {
  content: '';
  position: absolute;
  inset-block-end: -4px;
  inset-inline-start: 0;
  width: 100%;
  height: 2px;
  background: var(--c-accent);
  border-radius: var(--r-pill);
}
.topbar__actions {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  color: var(--c-text-muted);
  padding: 0.35rem 0.75rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--c-border-soft);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.lang-switch:hover {
  color: var(--c-text);
  border-color: var(--c-border);
}
.lang-switch b {
  color: var(--c-accent);
  font-weight: 700;
}

.hamburger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-sm);
  border: 1px solid var(--c-border-soft);
  color: var(--c-text);
}
@media (min-width: 900px) {
  .hamburger { display: none; }
}
.hamburger svg { width: 22px; height: 22px; }

/* Mobile drawer */
.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer);
  background: var(--c-bg);
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-out);
  visibility: hidden;
  display: flex;
  flex-direction: column;
  padding: var(--s-5);
  gap: var(--s-5);
}
html[dir="rtl"] .drawer {
  transform: translateX(-100%);
}
.drawer.is-open {
  transform: translateX(0);
  visibility: visible;
}
.drawer__close {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text);
}
.drawer__links {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  margin-top: var(--s-5);
}
.drawer__links a {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--c-text);
  padding-block: 0.5rem;
  border-bottom: 1px solid var(--c-border-soft);
}

/* ─── Footer ──────────────────────────────────────────────────────────── */
.footer {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border-soft);
  padding-block: var(--s-8) var(--s-5);
  margin-top: var(--s-9);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--s-6);
}
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer__grid { grid-template-columns: 1fr; gap: var(--s-5); } }

.footer__col h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-dim);
  margin-bottom: var(--s-3);
}
.footer__col ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer__col a {
  color: var(--c-text-muted);
  font-size: 0.9375rem;
  transition: color var(--dur-fast);
}
.footer__col a:hover { color: var(--c-accent); }
.footer__brand p {
  color: var(--c-text-muted);
  margin-top: var(--s-3);
  max-width: 32ch;
  font-size: 0.9375rem;
}
.footer__social {
  display: flex;
  gap: var(--s-3);
  margin-top: var(--s-4);
}
.footer__social a {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-sm);
  color: var(--c-text-muted);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.footer__social a:hover {
  color: var(--c-accent);
  border-color: var(--c-accent);
}
.footer__bottom {
  margin-top: var(--s-7);
  padding-top: var(--s-4);
  border-top: 1px solid var(--c-border-soft);
  font-size: 0.8125rem;
  color: var(--c-text-dim);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s-3);
}

/* ─── Forms ─────────────────────────────────────────────────────────── */
.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.field label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text);
}
.field .help {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
}
.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.75rem 1rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  color: var(--c-text);
  font-size: 1rem;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.field textarea {
  min-height: 120px;
  resize: vertical;
  font-family: inherit;
}
.field input:hover,
.field select:hover,
.field textarea:hover {
  border-color: var(--c-border-strong);
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-soft);
}
.field input::placeholder,
.field textarea::placeholder {
  color: var(--c-text-dim);
}

/* ─── Accordion (FAQ) ────────────────────────────────────────────────── */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.accordion details {
  background: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--dur-fast);
}
.accordion details[open] {
  border-color: var(--c-border);
}
.accordion summary {
  list-style: none;
  cursor: pointer;
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 1.0625rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: color var(--dur-fast);
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after {
  content: '+';
  font-family: var(--f-mono);
  font-size: 1.25rem;
  color: var(--c-accent);
  transition: transform var(--dur-base) var(--ease-out);
  font-weight: 400;
  line-height: 1;
}
.accordion details[open] summary::after {
  transform: rotate(45deg);
}
.accordion summary:hover {
  color: var(--c-accent);
}
.accordion details .body {
  padding: 0 1.5rem 1.25rem;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ─── Cookie consent banner ──────────────────────────────────────────── */
.cookie-banner {
  position: fixed;
  inset-block-end: 1rem;
  inset-inline-end: 1rem;
  max-width: 380px;
  padding: 1rem 1.25rem;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  color: var(--c-text-muted);
  z-index: var(--z-toast);
  display: none;
}
.cookie-banner.is-visible { display: block; }
.cookie-banner__actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* ─── Toast for form submissions ─────────────────────────────────────── */
.toast {
  position: fixed;
  inset-block-start: 1rem;
  inset-inline-end: 1rem;
  padding: 0.875rem 1.25rem;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  font-size: 0.9375rem;
  z-index: var(--z-toast);
  transform: translateY(-16px);
  opacity: 0;
  transition: transform var(--dur-base) var(--ease-out),
              opacity var(--dur-base) var(--ease-out);
  pointer-events: none;
  box-shadow: var(--shadow-md);
}
.toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}
.toast--success { border-color: rgba(63, 179, 127, 0.5); color: var(--c-success); }
.toast--danger  { border-color: rgba(224, 98, 78, 0.5);  color: var(--c-danger); }

/* ─── Icon check bullet ─────────────────────────────────────────────── */
.check-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  padding: 0;
  margin: 0;
}
.check-list li {
  position: relative;
  padding-inline-start: 1.75rem;
  line-height: 1.55;
}
.check-list li::before {
  content: '';
  position: absolute;
  inset-inline-start: 0;
  top: 0.35rem;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--c-accent-soft);
  background-image: linear-gradient(135deg, transparent 35%, var(--c-accent) 35% 65%, transparent 65%);
  background-size: 9px 2px;
  background-repeat: no-repeat;
  background-position: center;
  border: 1px solid var(--c-accent);
}
.check-list li::after {
  content: '✓';
  position: absolute;
  inset-inline-start: 0;
  top: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 900;
  color: var(--c-accent-hi);
}
.check-list li::before { display: none; } /* simplify to ✓ only */