/* Reusable components: nav, buttons, forms, cards, badges, marquees. */

/* ─── Nav ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-4) 0;
  transition: background-color var(--duration-normal) var(--ease-out-cubic),
              backdrop-filter var(--duration-normal) var(--ease-out-cubic),
              box-shadow var(--duration-normal) var(--ease-out-cubic);
}

.nav.is-scrolled {
  background: hsl(var(--surface) / 0.7);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  box-shadow: 0 1px 0 hsl(var(--border) / 0.4), var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-tight);
  color: hsl(var(--primary));
}

.brand__logo {
  /* Horizontal wordmark — height-locked, width auto-scales.
     Aspect: ~3.47:1 → at 2.25rem (36px) the wordmark is ~125px wide. */
  height: 2.25rem;
  width: auto;
  display: block;
  flex-shrink: 0;
}

/* The brand <a> already has aria-label="Krafts AI home" so the .sr-only
   span is redundant for assistive tech, but kept for SEO/legacy crawlers
   and as a fallback if the SVG fails to load. */

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
}

.nav__menu a {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
  color: hsl(var(--foreground-muted));
  transition: color var(--duration-fast) var(--ease-out-cubic),
              background-color var(--duration-fast) var(--ease-out-cubic);
}

.nav__menu a:hover {
  color: hsl(var(--primary));
  background: hsl(var(--brand-cyan) / 0.5);
}

.nav__menu a[aria-current="page"] { color: hsl(var(--accent)); }

.nav__lang {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  border: 1px solid hsl(var(--border));
  font-size: var(--text-sm);
  font-weight: 500;
  color: hsl(var(--foreground-muted));
  background: hsl(var(--surface));
  cursor: pointer;
}

.nav__lang:hover { border-color: hsl(var(--accent)); color: hsl(var(--primary)); }

[data-lang-menu][data-open="true"] { display: block !important; }
[data-lang-menu] button:hover { background: hsl(var(--brand-cyan) / 0.5); color: hsl(var(--primary)); }

@media (max-width: 768px) {
  .nav__menu { display: none; }
}

/* ─── Buttons ─── */
.btn {
  --btn-bg: transparent;
  --btn-fg: hsl(var(--primary));
  --btn-border: transparent;
  --btn-shadow: none;

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.5rem;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-snug);
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-border);
  box-shadow: var(--btn-shadow);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--duration-fast) var(--ease-out-cubic),
              box-shadow var(--duration-normal) var(--ease-out-cubic),
              background-color var(--duration-fast) var(--ease-out-cubic);
  white-space: nowrap;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--lg { padding: 1.0625rem 1.875rem; font-size: var(--text-base); }
.btn--sm { padding: 0.5rem 1rem; font-size: var(--text-xs); }

.btn--primary {
  --btn-bg: hsl(var(--primary));
  --btn-fg: white;
  --btn-shadow: var(--shadow-glow);
  background-image: var(--gradient-cta);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, hsl(var(--brand-surf)) 0%, hsl(var(--brand-frost)) 100%);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--duration-normal) var(--ease-out-cubic);
}

.btn--primary:hover::before { opacity: 1; }
.btn--primary:hover { box-shadow: 0 16px 50px -12px hsl(var(--brand-surf) / 0.6); }

.btn--ghost {
  --btn-bg: hsl(var(--surface) / 0.6);
  --btn-border: hsl(var(--border));
  backdrop-filter: blur(12px);
}

.btn--ghost:hover {
  --btn-border: hsl(var(--accent));
  --btn-bg: hsl(var(--surface));
}

.btn--outline {
  --btn-border: hsl(var(--primary));
}

.btn__arrow {
  display: inline-block;
  transition: transform var(--duration-normal) var(--ease-out-expo);
}

.btn:hover .btn__arrow { transform: translateX(3px); }

/* ─── Badge / pill ─── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: 600;
  background: hsl(var(--brand-cyan) / 0.5);
  color: hsl(var(--brand-twilight));
  border: 1px solid hsl(var(--brand-frost) / 0.4);
  letter-spacing: var(--tracking-snug);
}

.badge--accent {
  background: hsl(var(--accent) / 0.1);
  color: hsl(var(--accent-strong));
  border-color: hsl(var(--accent) / 0.25);
}

.badge--dark {
  background: hsl(var(--brand-twilight));
  color: hsl(var(--brand-frost));
  border-color: transparent;
}

.badge__dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 4px currentColor;
  opacity: 0.9;
  animation: pulse 2s var(--ease-in-out) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.9; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ─── Card ─── */
.card {
  background: hsl(var(--surface));
  border-radius: var(--radius-md);
  padding: var(--space-8);
  border: 1px solid hsl(var(--border));
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--duration-normal) var(--ease-out-cubic),
              box-shadow var(--duration-normal) var(--ease-out-cubic),
              border-color var(--duration-normal) var(--ease-out-cubic);
}

.card:hover {
  transform: translateY(-2px);
  border-color: hsl(var(--brand-frost));
  box-shadow: var(--shadow-md);
}

.card--glass {
  background: hsl(var(--surface) / 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-color: hsl(var(--border) / 0.5);
}

.card--bento { padding: var(--space-6); }

.card__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  background: var(--gradient-soft);
  color: hsl(var(--brand-twilight));
  margin-bottom: var(--space-5);
}

.card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-3);
  color: hsl(var(--primary));
}

.card__text {
  color: hsl(var(--foreground-muted));
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

/* ─── Stat ─── */
.stat__value {
  font-size: var(--text-5xl);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  background-image: var(--gradient-text);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.stat__label {
  margin-top: var(--space-2);
  color: hsl(var(--foreground-muted));
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* ─── Forms ─── */
.field { display: flex; flex-direction: column; gap: var(--space-2); }

.field__label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: hsl(var(--primary));
  letter-spacing: var(--tracking-snug);
}

.field__hint {
  font-size: var(--text-xs);
  color: hsl(var(--foreground-subtle));
}

.input,
.textarea,
.select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: var(--text-base);
  background: hsl(var(--input-bg));
  color: hsl(var(--foreground));
  border: 1px solid hsl(var(--border-strong));
  border-radius: var(--radius);
  transition: border-color var(--duration-fast) var(--ease-out-cubic),
              box-shadow var(--duration-fast) var(--ease-out-cubic);
}

.input::placeholder, .textarea::placeholder { color: hsl(var(--foreground-subtle)); }

.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: hsl(var(--accent));
  box-shadow: 0 0 0 4px hsl(var(--accent) / 0.15);
}

.textarea { min-height: 7rem; resize: vertical; line-height: var(--leading-normal); }

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2300446b'%3E%3Cpath d='M6 8l4 4 4-4' stroke='currentColor' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  background-size: 1.125rem;
  padding-right: 2.5rem;
}

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.checkbox-row input[type="checkbox"] {
  flex-shrink: 0;
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  border: 1.5px solid hsl(var(--border-strong));
  border-radius: var(--radius-sm);
  background: hsl(var(--input-bg));
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background var(--duration-fast), border-color var(--duration-fast);
  margin-top: 0.125rem;
}

.checkbox-row input[type="checkbox"]:checked {
  background: var(--gradient-cta);
  border-color: hsl(var(--accent));
}

.checkbox-row input[type="checkbox"]:checked::after {
  content: '';
  width: 0.45rem;
  height: 0.7rem;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1.5px);
}

.checkbox-row label {
  font-size: var(--text-sm);
  color: hsl(var(--foreground-muted));
  line-height: var(--leading-normal);
  cursor: pointer;
}

.field__error {
  display: none;
  font-size: var(--text-xs);
  font-weight: 500;
  color: hsl(var(--danger));
}

.field.has-error .input,
.field.has-error .textarea,
.field.has-error .select { border-color: hsl(var(--danger)); }

.field.has-error .field__error { display: block; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.form-grid > .field--full { grid-column: 1 / -1; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
}

.form-status {
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  display: none;
}

.form-status.is-success {
  display: block;
  background: hsl(var(--success) / 0.1);
  color: hsl(var(--success));
  border: 1px solid hsl(var(--success) / 0.3);
}

.form-status.is-error {
  display: block;
  background: hsl(var(--danger) / 0.08);
  color: hsl(var(--danger));
  border: 1px solid hsl(var(--danger) / 0.25);
}

/* ─── Marquee ─── */
.marquee {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  padding-block: var(--space-6);
}

.marquee__track {
  display: flex;
  gap: var(--space-12);
  width: max-content;
  animation: marquee 40s linear infinite;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

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

.marquee__item {
  font-weight: 600;
  font-size: var(--text-base);
  color: hsl(var(--foreground-muted));
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  white-space: nowrap;
}

.marquee__item::before {
  content: '✦';
  color: hsl(var(--accent));
  font-size: 0.85em;
}

/* ─── Footer ─── */
.footer {
  border-top: 1px solid hsl(var(--border));
  padding-block: var(--space-12) var(--space-8);
  background: hsl(var(--surface-sunken));
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-12);
}

.footer__col h5 {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  color: hsl(var(--foreground-muted));
}

.footer__col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.footer__col a {
  font-size: var(--text-sm);
  color: hsl(var(--foreground-muted));
}
.footer__col a:hover { color: hsl(var(--accent)); }

.footer__bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid hsl(var(--border));
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: hsl(var(--foreground-subtle));
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .footer__inner { grid-template-columns: 1fr; gap: var(--space-8); }
}

/* ─── Trust strip ─── */
.trust {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  padding: var(--space-4) 0;
  font-size: var(--text-sm);
  color: hsl(var(--foreground-muted));
}

.trust__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
}

.trust__item svg { color: hsl(var(--success)); }