/* ============================================================
   Components: header, buttons, chips, pickers, forms, footer
   ============================================================ */

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background-color var(--dur-2) ease, border-color var(--dur-2) ease,
    backdrop-filter var(--dur-2) ease, transform var(--dur-2) var(--ease-out-expo);
  border-bottom: 1px solid transparent;
}

.site-header.is-hidden { transform: translateY(-100%); }

.site-header.is-scrolled {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--glass-border);
}

.header-inner {
  width: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: var(--text-lg);
  white-space: nowrap;
}

.brand svg { height: 2rem; width: auto; }

.brand-logo { height: 2.7rem; width: auto; }
.brand-logo--dark { display: none; }
[data-theme="dark"] .brand-logo--light { display: none; }
[data-theme="dark"] .brand-logo--dark { display: block; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-inline: auto;
}

.main-nav a {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 550;
  color: var(--text-muted);
  transition: color var(--dur-1) ease, background-color var(--dur-1) ease;
}

.main-nav a:hover { color: var(--text); }

.main-nav a.is-active {
  color: var(--text);
  background: var(--accent-soft);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

/* ---------- Buttons ---------- */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-full);
  font-weight: 620;
  font-size: var(--text-md);
  line-height: 1.2;
  white-space: nowrap;
  transition: transform var(--dur-1) var(--ease-out-expo), box-shadow var(--dur-2) ease,
    background-color var(--dur-1) ease, color var(--dur-1) ease, border-color var(--dur-1) ease;
  will-change: transform;
}

.btn--primary {
  position: relative;
  overflow: hidden;
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 8px 24px rgb(13 176 142 / 0.35);
}

.btn--primary::after {
  content: "";
  position: absolute;
  inset: -20% auto;
  width: 40%;
  left: 0;
  background: linear-gradient(105deg, transparent, rgb(255 255 255 / 0.35), transparent);
  transform: translateX(-180%) skewX(-18deg);
  pointer-events: none;
}

.btn--primary:hover::after {
  transition: transform 650ms ease;
  transform: translateX(320%) skewX(-18deg);
}

.btn--primary:hover {
  box-shadow: 0 12px 32px rgb(13 176 142 / 0.45);
}

.btn--ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.btn--small {
  padding: 0.5rem 1.1rem;
  font-size: var(--text-sm);
}

.btn .btn-label { display: inline-flex; align-items: center; gap: 0.5rem; transition: transform var(--dur-1) var(--ease-out-expo); }

.btn[disabled] { opacity: 0.6; cursor: not-allowed; }

/* ---------- Icon buttons (theme toggle, lang, burger) ---------- */

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  height: 2.4rem;
  min-width: 2.4rem;
  padding-inline: 0.55rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: transparent;
  font-size: var(--text-sm);
  font-weight: 570;
  transition: color var(--dur-1) ease, border-color var(--dur-1) ease, background-color var(--dur-1) ease;
}

.icon-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-2);
}

.icon-btn svg { width: 1.05rem; height: 1.05rem; }

/* Theme toggle shows exactly one glyph at a time */
.theme-toggle [data-theme-icon] { display: none; }
html[data-theme-pref="system"] .theme-toggle [data-theme-icon="system"] { display: block; }
html[data-theme-pref="light"] .theme-toggle [data-theme-icon="light"] { display: block; }
html[data-theme-pref="dark"] .theme-toggle [data-theme-icon="dark"] { display: block; }

/* ---------- Popover (language picker) ---------- */

.popover-wrap { position: relative; }

.popover {
  position: absolute;
  top: calc(100% + 0.6rem);
  right: 0;
  z-index: var(--z-popover);
  min-width: 13.5rem;
  padding: 0.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(1.5);
  backdrop-filter: blur(18px) saturate(1.5);
  box-shadow: var(--shadow-card);
  display: none;
  max-height: min(70vh, 26rem);
  overflow: auto;
}

.popover.is-open { display: block; }

.popover [role="menuitemradio"] {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 530;
  color: var(--text-muted);
  text-align: left;
}

.popover [role="menuitemradio"]:hover {
  background: var(--surface-2);
  color: var(--text);
}

.popover [role="menuitemradio"][aria-checked="true"] {
  color: var(--accent);
  font-weight: 650;
}

.popover [role="menuitemradio"][aria-checked="true"]::after {
  content: "✓";
}

/* ---------- Chips & badges ---------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.8rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: var(--surface-1);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}

.chip svg { width: 0.85rem; height: 0.85rem; }

.chip--accent {
  border-color: rgb(2 168 132 / 0.3);
  background: var(--accent-soft);
  color: var(--accent);
}

.domain-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-strong);
  background: var(--surface-1);
  font-size: var(--text-sm);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  transition: border-color var(--dur-1) ease, background-color var(--dur-1) ease, transform var(--dur-1) var(--ease-out-expo);
}

.domain-chip:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.domain-chip svg { width: 0.8rem; height: 0.8rem; color: var(--accent); }

/* ---------- E2EE callout (mandatory on every product) ---------- */

.e2ee-callout {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-4) var(--space-5);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  background: linear-gradient(90deg, var(--accent-soft), transparent 85%);
}

.e2ee-callout .e2ee-icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: var(--accent-contrast);
  box-shadow: 0 6px 16px rgb(2 168 132 / 0.35);
}

.e2ee-callout .e2ee-icon svg { width: 1.2rem; height: 1.2rem; }

.e2ee-callout strong {
  display: block;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent);
  margin-bottom: 0.2rem;
}

.e2ee-callout p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.55;
}

/* ---------- Cards ---------- */

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--surface-1);
  box-shadow: var(--shadow-soft);
  padding: var(--space-6);
  transition: transform var(--dur-2) var(--ease-out-expo), box-shadow var(--dur-2) ease,
    border-color var(--dur-2) ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
  border-color: var(--border-strong);
}

.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.card p { font-size: var(--text-sm); color: var(--text-muted); }

.card-icon {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--gradient-brand-soft);
  color: var(--accent);
}

.card-icon svg { width: 1.3rem; height: 1.3rem; }

/* ---------- Feature list ---------- */

.feature-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.feature-list li {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: var(--text-sm);
  color: var(--text-muted);
  line-height: 1.5;
}

.feature-list li svg {
  flex: none;
  width: 1.05rem;
  height: 1.05rem;
  margin-top: 0.15rem;
  color: var(--accent);
}

.feature-list li strong { color: var(--text); font-weight: 620; }

/* ---------- Mini stepper (how it works) ---------- */

.mini-steps {
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
  counter-reset: step;
}

.mini-steps li {
  position: relative;
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  font-size: var(--text-sm);
  color: var(--text-muted);
  counter-increment: step;
}

.mini-steps li::before {
  content: counter(step, decimal-leading-zero);
  flex: none;
  font-size: var(--text-xs);
  font-weight: 750;
  font-variant-numeric: tabular-nums;
  color: transparent;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
}

.mini-steps li strong { color: var(--text); font-weight: 630; }

/* ---------- Forms ---------- */

.field {
  display: grid;
  gap: 0.45rem;
}

.field label {
  font-size: var(--text-sm);
  font-weight: 600;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
  color: var(--text);
  transition: border-color var(--dur-1) ease, box-shadow var(--dur-1) ease;
}

.field input::placeholder,
.field textarea::placeholder { color: var(--text-faint); }

.field input:focus-visible,
.field textarea:focus-visible {
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
  outline: none;
}

.field textarea { min-height: 9rem; resize: vertical; }

.field .field-error {
  display: none;
  font-size: var(--text-xs);
  color: #e25f5f;
  font-weight: 550;
}

.field.has-error input,
.field.has-error textarea { border-color: #e25f5f; }
.field.has-error .field-error { display: block; }

.checkbox-row {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.checkbox-row input {
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.2rem;
  accent-color: var(--accent);
}

.checkbox-row a { color: var(--accent); font-weight: 600; }
.checkbox-row a:hover { text-decoration: underline; }

.cf-turnstile-wrap {
  min-height: 65px;
}

.form-status {
  display: none;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 560;
}

.form-status.is-success {
  display: block;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgb(2 168 132 / 0.3);
}

.form-status.is-error {
  display: block;
  background: rgb(226 95 95 / 0.1);
  color: #e25f5f;
  border: 1px solid rgb(226 95 95 / 0.3);
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-raised);
  padding-block: var(--space-10) var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-9);
}

.footer-brand p {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-muted);
  max-width: 28ch;
}

.footer-col h4 {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: color var(--dur-1) ease;
}

.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-faint);
}

.footer-bottom .spacer { flex: 1; }

/* ---------- Mobile nav ---------- */

.nav-burger { display: none; }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  display: none;
  flex-direction: column;
  padding: calc(var(--header-h) + 2rem) var(--gutter) 3rem;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  backdrop-filter: blur(24px) saturate(1.5);
}

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

.mobile-menu nav {
  display: grid;
  gap: var(--space-2);
}

.mobile-menu nav a {
  font-size: var(--display-md);
  font-weight: 700;
  letter-spacing: -0.02em;
  padding: 0.4rem 0;
}

.mobile-menu .mobile-menu-foot {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

/* ---------- Responsive header ---------- */

@media (max-width: 63.99rem) {
  .main-nav { display: none; }
  .header-cta { display: none; }
  .nav-burger { display: inline-flex; }
}

@media (max-width: 47.99rem) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 29.99rem) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
}

/* ---------- Scroll progress bar ---------- */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: var(--z-progress);
  background: var(--gradient-brand);
  transform-origin: 0 50%;
  transform: scaleX(0);
  pointer-events: none;
}

/* ---------- Scroll-to-top ---------- */

.scroll-top {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: var(--z-header);
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: var(--shadow-card);
  color: var(--text);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease-out-expo), transform var(--dur-2) var(--ease-out-expo),
    border-color var(--dur-1) ease;
}

.scroll-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.scroll-top:hover { border-color: var(--accent); }

.scroll-top svg {
  width: 1.1rem;
  height: 1.1rem;
  rotate: 180deg;
}