/**
 * components.css — shared UI: navbar, footer, buttons, accordion,
 * language dropdown, tooltip, marquee, feature rows, media placeholders.
 */

/* ==================== Buttons (interaction-spec §0.3) ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8em 1.6em;
  border-radius: var(--radius-lg);
  font-weight: 550;
  text-decoration: none;
  transition:
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out);
  will-change: transform;
}
.btn:active { transform: scale(0.98); transition-duration: 80ms; }

.btn--primary {
  background: var(--primary);
  color: #1e1e1e; /* bright coral needs dark text for contrast */
}
.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--primary-dark);
  color: #ffffff;
  transform: scale(1.02) translateY(-2px);
  box-shadow: 0 6px 16px rgba(var(--primary-rgb), 0.35);
}

.btn--ghost {
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}
.btn--ghost:hover, .btn--ghost:focus-visible { background: var(--bg-tertiary); }

/* XL buttons scale fluidly with the viewport — no oversized buttons on
   narrow screens (owner revision 2026-07-11, ref buttonsize1/2.png) */
.btn--xl {
  padding: clamp(0.75em, 0.55em + 0.9vw, 1.1em) clamp(1.3em, 0.9em + 2vw, 2.2em);
  font-size: clamp(1rem, 0.93rem + 0.35vw, 1.125rem);
  border-radius: var(--radius-xl);
  max-width: 100%;
}

/* Button loading / success states (download page §3.2) */
.btn .btn-label, .btn .btn-loading, .btn .btn-done {
  grid-area: 1 / 1;
  display: inline-flex; align-items: center; gap: var(--space-2);
  justify-content: center;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.btn--stateful { display: inline-grid; }
.btn--stateful .btn-loading, .btn--stateful .btn-done { opacity: 0; pointer-events: none; }
.btn--stateful.is-loading .btn-label, .btn--stateful.is-done .btn-label { opacity: 0; }
.btn--stateful.is-loading .btn-loading { opacity: 1; }
.btn--stateful.is-done .btn-done { opacity: 1; }

.spinner {
  width: 1em; height: 1em;
  border: 2px solid currentColor; border-top-color: transparent;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.check-draw path {
  stroke-dasharray: 24;
  stroke-dashoffset: 24;
}
.is-done .check-draw path { animation: draw 300ms var(--ease-out) forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* ==================== Navbar (interaction-spec §0.4) ==================== */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: color-mix(in srgb, var(--bg-primary) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base) var(--ease-in-out);
}
.nav.is-scrolled { border-bottom-color: var(--border-color); }

/* Nav scaled to ~70% of its original size (owner revision, 2026-07-11):
   paddings, brand, links, and CTA all shrink together to keep proportions. */
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: 0.625rem;
  transition: padding var(--dur-base) var(--ease-in-out);
}
.nav.is-scrolled .nav__inner { padding-block: 0.375rem; }

.nav__brand {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-weight: 650; text-decoration: none; font-size: 0.9375rem;
}
.nav__brand img { width: 1.25rem; height: 1.25rem; }

.nav__links { display: flex; align-items: center; gap: var(--space-5); }
.nav__link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color var(--dur-fast);
}
/* Nav CTA: compact variant of the primary button */
.nav__cta { padding: 0.45em 1.1em; font-size: 0.875rem; border-radius: var(--radius-md); }

/* Nav account slot (W1.4) — space reserved in BOTH auth states so toggling
   causes zero layout shift. main.js flips .authed from a localStorage hint;
   aria-hidden/tabindex are managed alongside so the invisible link is never
   focusable or announced. */
.nav__account { visibility: hidden; }
.authed .nav__account { visibility: visible; }
.nav__link:hover, .nav__link:focus-visible { color: var(--text-primary); }
.nav__link[aria-current="page"] { color: var(--primary-dark); font-weight: 550; }

/* Mobile menu */
.nav__toggle { display: none; padding: var(--space-2); }
.nav__toggle svg { width: 1.5rem; height: 1.5rem; }

@media (max-width: 48rem) {
  .nav__toggle { display: inline-flex; }
  .nav__links {
    display: none;
    position: absolute;
    inset: 100% 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4);
  }
  .nav__links.is-open { display: flex; }
  @media (prefers-reduced-motion: no-preference) {
    .nav__links.is-open { animation: menu-in var(--dur-base) var(--ease-out); }
  }
  .nav__link { padding: var(--space-3); min-height: 44px; display: flex; align-items: center; }
  body.menu-locked { overflow: hidden; }


}
@keyframes menu-in { from { opacity: 0; transform: translateY(-8px); } }

/* ==================== Dropdown (language, §0.4) ==================== */
.dropdown { position: relative; }
.dropdown__btn {
  display: inline-flex; align-items: center; gap: var(--space-1);
  color: var(--text-secondary); font-size: 0.875rem;
  padding: var(--space-1) var(--space-2);
}
/* Touch targets stay ≥44px where fingers are involved */
@media (pointer: coarse) { .dropdown__btn { min-height: 44px; } }
.dropdown__btn:hover { color: var(--text-primary); }
.dropdown__menu {
  position: absolute;
  top: calc(100% + 4px); right: 0;
  min-width: 9rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  z-index: var(--z-dropdown);
  opacity: 0;
  transform: translateY(-4px);
  visibility: hidden;
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility var(--dur-fast);
}
.dropdown.is-open .dropdown__menu { opacity: 1; transform: none; visibility: visible; }
.dropdown__item {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  text-align: left;
  /* The language switcher renders these as <a> (other languages) and <span>
     (the current one) so it works with JS disabled — reset anchor styling. */
  color: inherit;
  text-decoration: none;
}
.dropdown__item:hover, .dropdown__item:focus-visible { background: var(--bg-tertiary); }
.dropdown__item[aria-disabled="true"] { color: var(--text-tertiary); cursor: not-allowed; }
.dropdown__item[aria-checked="true"]::after { content: "✓"; color: var(--primary-dark); }
/* Current language is a <span>, not a link: no pointer, no hover lift. */
.dropdown__item.is-current { cursor: default; font-weight: 550; }
.dropdown__item.is-current:hover { background: none; }

/* Mobile: the language switcher lives inside the stacked nav menu.
   This block must come AFTER the base .dropdown rules above — same specificity,
   so source order decides, and an earlier block would lose to `position:absolute`. */
@media (max-width: 48rem) {
  .dropdown { width: 100%; }
  .dropdown__btn {
    width: 100%;
    justify-content: space-between;
    padding: var(--space-3);
    min-height: 44px;
  }
  .dropdown__menu {
    position: static;
    min-width: 0;
    width: 100%;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0 0 0 var(--space-3);
    /* Collapsed by default; no transform/visibility games needed in flow. */
    display: none;
    opacity: 1;
    transform: none;
    visibility: visible;
  }
  .dropdown.is-open .dropdown__menu { display: block; }
  .dropdown__item { min-height: 44px; }
}

/* ==================== Accordion (interaction-spec §1.7) ====================
   Progressive enhancement over <details open>: with JS disabled every
   answer stays open and readable. JS closes items and animates. */
.accordion { display: grid; gap: var(--space-3); }
.qa-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
}
.qa-item summary {
  list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  min-height: 44px;
  font-weight: 550;
  cursor: pointer;
  border-radius: var(--radius-lg);
}
.qa-item summary::-webkit-details-marker { display: none; }
.qa-item .qa-indicator {
  flex: none;
  width: 1.25rem; height: 1.25rem;
  position: relative;
  color: var(--text-secondary);
}
.qa-indicator::before, .qa-indicator::after {
  content: "";
  position: absolute; inset: 50% auto auto 50%;
  background: currentColor;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast);
}
.qa-indicator::before { width: 12px; height: 2px; transform: translate(-50%, -50%); }
.qa-indicator::after  { width: 2px; height: 12px; transform: translate(-50%, -50%); }
.qa-item[open] .qa-indicator::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }

/* Height animation: JS wraps the flow with grid-template-rows 0fr→1fr */
.qa-body-clip { overflow: hidden; }
.js .qa-anim .qa-body-wrap {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--dur-base) var(--ease-out);
}
.js .qa-anim.is-closing .qa-body-wrap,
.js .qa-anim.is-preopen .qa-body-wrap { grid-template-rows: 0fr; }
.qa-body {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--text-secondary);
  transition: opacity var(--dur-base) var(--ease-out);
}
.js .qa-anim.is-closing .qa-body, .js .qa-anim.is-preopen .qa-body { opacity: 0; }

/* Deep-link arrival pulse (Q&A page §4.4) */
.qa-item.is-pinged { animation: ping-tint 600ms var(--ease-out); }
@keyframes ping-tint { from { background-color: var(--primary-light); } }

/* Copy-link affordance (Q&A page §4.4) */
.qa-copy {
  flex: none;
  opacity: 0;
  color: var(--text-tertiary);
  padding: var(--space-1);
  transition: opacity var(--dur-fast);
}
.qa-item[open] summary:hover .qa-copy,
.qa-item[open] .qa-copy:focus-visible { opacity: 1; }
.qa-copy svg { width: 1rem; height: 1rem; }
.qa-copy .icon-check { display: none; color: var(--success); }
.qa-copy.is-copied .icon-link { display: none; }
.qa-copy.is-copied .icon-check { display: block; }

/* ==================== Footer ==================== */
.footer {
  border-top: 1px solid var(--border-color);
  padding-block: var(--space-8);
  margin-top: var(--section-gap);
  font-size: 0.875rem;
  color: var(--text-secondary);
}
.footer__inner {
  display: flex; flex-wrap: wrap; gap: var(--space-6);
  align-items: center; justify-content: space-between;
}
.footer__left { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); }
.footer__lang { display: flex; gap: var(--space-3); align-items: center; }
.footer__lang button,
.footer__lang a,
.footer__lang span {
  display: inline-flex; align-items: center;
  color: var(--text-secondary);
  min-height: 44px;
  text-decoration: none;
}
.footer__lang a:hover, .footer__lang a:focus-visible { color: var(--text-primary); }
.footer__lang [aria-current="true"] { color: var(--text-primary); font-weight: 550; }
.footer__lang [aria-disabled="true"] { color: var(--text-tertiary); cursor: not-allowed; }

/* Fail-open badge + tooltip (interaction-spec §1.9, WCAG 1.4.13) */
.failopen { position: relative; display: inline-flex; }
.failopen__badge {
  display: inline-flex; align-items: center; gap: var(--space-2);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  min-height: 44px;
}
.failopen__badge svg { width: 1rem; height: 1rem; }
.failopen__tip {
  position: absolute;
  bottom: calc(100% + 8px); right: 0;
  width: min(20rem, 80vw);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-3) var(--space-4);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  opacity: 0;
  transform: translateY(4px);
  visibility: hidden;
  transition: opacity 200ms var(--ease-out), transform 200ms var(--ease-out), visibility 200ms;
  z-index: var(--z-tooltip);
}
/* Hover-persistent: tooltip stays while pointer is over badge OR tooltip */
.failopen:hover .failopen__tip,
.failopen:focus-within .failopen__tip,
.failopen__tip:hover { opacity: 1; transform: none; visibility: visible; }
.failopen.tip-dismissed .failopen__tip { opacity: 0 !important; visibility: hidden !important; }

/* ==================== Logo marquee (interaction-spec §1.3) ==================== */
.marquee {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}
.marquee__track {
  display: flex;
  gap: var(--space-10);
  width: max-content;
  animation: marquee 30s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

.logo-slot {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border: 1px dashed var(--border-hover);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-5);
  opacity: 0.5;
  filter: grayscale(1);
  transition: opacity var(--dur-fast);
  white-space: nowrap;
}
.marquee .logo-slot:hover { opacity: 1; }

/* Touch: 80% opacity, keep running, not focusable (handled in HTML) */
@media (hover: none) {
  .logo-slot { opacity: 0.8; }
}
/* Reduced motion: static, natively scrollable row, full opacity */
@media (prefers-reduced-motion: reduce) {
  .marquee { overflow-x: auto; mask-image: none; -webkit-mask-image: none; }
  .marquee__track { animation: none; }
  .marquee__track--dup { display: none; }
  .logo-slot { opacity: 1; }
}

/* ==================== Feature rows (landing §1.5 / features §5.2) ==================== */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 6vw, var(--space-12));
  align-items: center;
  padding-block: var(--space-10);
}
.feature-row + .feature-row { border-top: 1px solid var(--border-color); }
.feature-row--flip .row-text { order: 2; }
.feature-row--flip .row-media { order: 1; --slide-from: -12px; }

.row-num {
  font-family: 'JetBrains Mono', monospace;
  color: var(--primary-dark);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.row-text h3 { font-size: 1.5rem; margin-bottom: var(--space-3); }
.row-text p { color: var(--text-secondary); max-width: 44ch; }

@media (max-width: 48rem) {
  .feature-row { grid-template-columns: 1fr; }
  .feature-row--flip .row-text { order: 1; }
  .feature-row--flip .row-media { order: 2; }
}

/* Media placeholder frames (assets pending — see MISSING-ASSETS.md) */
.media-frame {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}
.placeholder-label {
  position: absolute;
  inset: auto var(--space-3) var(--space-3) auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6875rem;
  color: var(--text-tertiary);
  border: 1px dashed var(--border-hover);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  background: var(--bg-primary);
}

/* Progress gauges (landing row 1 / features row 5) */
.gauges { display: grid; gap: var(--space-4); width: 100%; max-width: 24rem; }
.gauge { display: grid; gap: var(--space-1); }
.gauge__label {
  display: flex; justify-content: space-between;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; color: var(--text-secondary);
}
.gauge__bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.gauge__fill {
  height: 100%;
  background: var(--primary);
  border-radius: inherit;
  transform-origin: left;
  transform: scaleX(var(--fill, 0));
}
@media (prefers-reduced-motion: no-preference) {
  .js .gauge__fill { transform: scaleX(0); }
  .js .is-visible .gauge__fill,
  .js .gauge--go .gauge__fill {
    transform: scaleX(var(--fill));
    transition: transform 900ms var(--ease-out);
  }
  .js .is-visible .gauge:nth-child(2) .gauge__fill { transition-delay: 150ms; }
  .js .is-visible .gauge:nth-child(3) .gauge__fill { transition-delay: 300ms; }
  /* Features row 5 hover: leading bar nudges +5% then settles, springy */
  .gauge-hover:hover .gauge:first-child .gauge__fill {
    transition: transform 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
    transform: scaleX(calc(var(--fill) + 0.05));
  }
}

/* Magnet chips (landing row 2 / features row 3) */
.magnet { display: flex; align-items: center; gap: var(--space-6); }
.magnet__chips { display: grid; gap: var(--space-2); }
.file-chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-primary);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base);
}
.magnet__card {
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  padding: var(--space-4) var(--space-5);
  min-width: 9rem;
  box-shadow: var(--shadow-sm);
}
.magnet__card .card-line { height: 8px; border-radius: var(--radius-full); background: var(--bg-tertiary); margin-top: var(--space-2); }
.magnet__card .card-line:first-child { margin-top: 0; width: 70%; background: var(--border-hover); }
@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .magnet:hover .file-chip { transform: translateX(6px); }
  .magnet:hover .file-chip:nth-child(3) { border-color: var(--primary); color: var(--primary-dark); }
}

/* Terminal chip (landing row 3 / features row 4) */
.terminal-chip {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9375rem;
  background: #161616;
  color: #f5f5f5;
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  box-shadow: var(--shadow-sm);
}
.terminal-chip .prompt { color: var(--primary); }
.terminal-chip .caret {
  display: inline-block;
  width: 1ch; height: 1.1em;
  vertical-align: text-bottom;
  background: #f5f5f5;
  opacity: 0;
}
.terminal-chip.is-typing .caret { animation: blink 600ms steps(1) infinite; }
.terminal-chip.is-blinking .caret { animation: blink 600ms steps(1) 2; } /* 2 cycles then static */
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

/* ==================== CTA band (landing §1.8 / features §5.3) ==================== */
.cta-band {
  background: var(--band-bg);
  color: var(--band-text);
  text-align: center;
  padding-block: var(--section-gap);
  border-block: 1px solid rgba(var(--primary-rgb), 0.25);
}
.cta-band h2 { max-width: 22ch; margin-inline: auto; }
.cta-band .cta-sub { color: var(--band-text-sub); margin-top: var(--space-4); }
.cta-band .btn { margin-top: var(--space-8); }
.cta-band .trust-line { margin-top: var(--space-6); color: var(--band-text-sub); }

/* Staged entrance: headline → +100ms sub → +200ms button */
.js .cta-band.reveal .cta-sub { --reveal-delay: 100ms; }
.js .cta-band.reveal .btn { --reveal-delay: 200ms; }
@media (prefers-reduced-motion: no-preference) {
  .js .cta-band.reveal .cta-sub,
  .js .cta-band.reveal .btn { opacity: 0; transform: translateY(16px); }
  .js .cta-band.reveal.is-visible .cta-sub,
  .js .cta-band.reveal.is-visible .btn {
    opacity: 1; transform: none;
    transition: opacity var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
    transition-delay: var(--reveal-delay);
  }
}

/* Breathing pulse — landing final CTA ONLY; pauses on hover; off under RM */
@media (prefers-reduced-motion: no-preference) {
  .btn--pulse { animation: breathe 2.5s var(--ease-in-out) infinite; }
  .btn--pulse:hover, .btn--pulse:focus-visible { animation-play-state: paused; }
}
@keyframes breathe { 0%, 100% { scale: 1; } 50% { scale: 1.02; } }

.trust-line {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ==================== Category chips (Q&A §4.3) ==================== */
.chip-row {
  display: flex; gap: var(--space-2);
  overflow-x: auto;
  padding-block: var(--space-2);
  scrollbar-width: none;
  mask-image: linear-gradient(to right, black 94%, transparent);
  -webkit-mask-image: linear-gradient(to right, black 94%, transparent);
}
.chip-row::-webkit-scrollbar { display: none; }
.chip {
  flex: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  color: var(--text-secondary);
  min-height: 40px;
  transition: background-color var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast);
}
.chip[aria-checked="true"] {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 550;
}

/* ==================== Language auto-redirect notice ====================
   Shown ONLY when js/i18n.js redirected the visitor by browser language
   (?auto=1). It is `hidden` in the markup, so it never appears for a
   deliberate visit or when JS is off. Sits directly under the sticky nav. */
.lang-notice {
  position: sticky;
  top: var(--nav-height);
  z-index: calc(var(--z-dropdown) - 1);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
}
.lang-notice[hidden] { display: none; }
.lang-notice__inner {
  display: flex; align-items: center; gap: var(--space-3);
  flex-wrap: wrap;
  padding-block: var(--space-2);
  min-height: 44px;
}
.lang-notice__inner > span { color: var(--text-secondary); }
.lang-notice__close {
  margin-left: auto;
  color: var(--text-tertiary);
  min-width: 44px; min-height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
}
.lang-notice__close:hover { color: var(--text-primary); }