/* ==========================================================================
   Tokens
   ========================================================================== */
:root {
  --bg-0: #ededed;
  --bg-1: #f7f7f7;
  --bg-2: #ffffff;
  --ink-0: #121212;
  --ink-1: #4d4d4d;
  --ink-2: #7c7c7c;
  --border: rgba(18, 18, 18, 0.12);
  --border-strong: rgba(18, 18, 18, 0.22);

  --btn-primary-bg: #121212;
  --btn-primary-bg-hover: #000000;
  --btn-primary-text: #ffffff;

  --moss: #3f7a3a;
  --rust: #a23c26;
  --sky: #2f6a80;

  --shadow-card: 0 1px 2px rgba(18, 18, 18, 0.08), 0 12px 28px -14px rgba(18, 18, 18, 0.28);
  --shadow-pop: 0 2px 4px rgba(18, 18, 18, 0.1), 0 20px 40px -16px rgba(18, 18, 18, 0.32);

  --radius-xs: 3px;
  --radius-sm: 6px;
  --radius-md: 9px;
  --radius-lg: 14px;

  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;
  --sp-10: 128px;

  --font-display: 'Space Grotesk', 'IBM Plex Sans', system-ui, sans-serif;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --fs-h1: clamp(2.25rem, 1.65rem + 2.6vw, 3.75rem);
  --fs-h2: clamp(1.75rem, 1.5rem + 1.1vw, 2.25rem);
  --fs-h3: 1.375rem;
  --fs-lead: clamp(1.0625rem, 1rem + 0.3vw, 1.1875rem);
  --fs-body: 1rem;
  --fs-sm: 0.875rem;
  --fs-xs: 0.8125rem;

  --header-h: 72px;
  --container: 1140px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms;
  --dur-base: 300ms;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-0: #111111;
    --bg-1: #1a1a1a;
    --bg-2: #212121;
    --ink-0: #f2f2f2;
    --ink-1: #b8b8b8;
    --ink-2: #7d7d7d;
    --border: rgba(242, 242, 242, 0.12);
    --border-strong: rgba(242, 242, 242, 0.22);

    --btn-primary-bg: #f2f2f2;
    --btn-primary-bg-hover: #ffffff;
    --btn-primary-text: #121212;

    --moss: #86b976;
    --rust: #dd8265;
    --sky: #86bdd2;

    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 28px -14px rgba(0, 0, 0, 0.6);
    --shadow-pop: 0 2px 4px rgba(0, 0, 0, 0.45), 0 20px 40px -16px rgba(0, 0, 0, 0.7);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg-0: #111111;
  --bg-1: #1a1a1a;
  --bg-2: #212121;
  --ink-0: #f2f2f2;
  --ink-1: #b8b8b8;
  --ink-2: #7d7d7d;
  --border: rgba(242, 242, 242, 0.12);
  --border-strong: rgba(242, 242, 242, 0.22);

  --btn-primary-bg: #f2f2f2;
  --btn-primary-bg-hover: #ffffff;
  --btn-primary-text: #121212;

  --moss: #86b976;
  --rust: #dd8265;
  --sky: #86bdd2;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 28px -14px rgba(0, 0, 0, 0.6);
  --shadow-pop: 0 2px 4px rgba(0, 0, 0, 0.45), 0 20px 40px -16px rgba(0, 0, 0, 0.7);
  color-scheme: dark;
}

/* ==========================================================================
   Reset / base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg-0);
  color: var(--ink-0);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; color: inherit; background: none; border: none; }
code { font-family: var(--font-mono); }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink-0);
}
h1 { font-size: var(--fs-h1); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0; }

.wrap {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}

section[id] { scroll-margin-top: calc(var(--header-h) + var(--sp-4)); }

.skip-link {
  position: absolute;
  left: var(--sp-3);
  top: -60px;
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  z-index: 200;
  transition: top var(--dur-fast) var(--ease-out);
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: var(--sp-3); }

:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

.icon { width: 1em; height: 1em; display: inline-block; vertical-align: -0.125em; }
.icon--xs { width: 0.75em; height: 0.75em; margin-inline-start: 0.35em; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: 0.7em 1.15em;
  min-height: 44px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  box-shadow: var(--shadow-card);
}
.btn--primary:hover { background: var(--btn-primary-bg-hover); }
.btn--ghost {
  background: var(--bg-1);
  color: var(--ink-0);
  border-color: var(--border-strong);
}
.btn--ghost:hover { background: var(--bg-2); border-color: var(--ink-2); }
.btn--lg { padding: 0.85em 1.5em; font-size: var(--fs-body); width: 100%; }
.btn--sm { padding: 0.5em 0.9em; min-height: 36px; }

@media (min-width: 560px) {
  .btn--lg { width: auto; }
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  color: var(--ink-1);
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--bg-1); color: var(--ink-0); }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg-0) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  text-decoration: none;
  color: var(--ink-0);
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-xs);
  border: 1.5px solid var(--ink-0);
  color: var(--ink-0);
  flex-shrink: 0;
}
.logo-mark .icon { width: 16px; height: 16px; }
.brand-wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.site-nav {
  display: none;
  align-items: center;
  gap: var(--sp-6);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-sm);
}
.site-nav a {
  text-decoration: none;
  color: var(--ink-1);
  transition: color var(--dur-fast) var(--ease-out);
}
.site-nav a:hover { color: var(--ink-0); }

.header-actions { display: flex; align-items: center; gap: var(--sp-2); }
.nav-download span { display: none; }
.nav-github { display: none; }
.theme-switch.header-theme-switch { display: none; }

.theme-switch {
  display: flex;
  align-items: center;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}
.theme-switch button {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: calc(var(--radius-sm) - 3px);
  color: var(--ink-2);
  transition: background-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.theme-switch button:hover { color: var(--ink-0); }
.theme-switch button[aria-checked="true"] {
  background: var(--bg-2);
  color: var(--ink-0);
  box-shadow: var(--shadow-card);
}

.menu-toggle { display: inline-flex; }

.mobile-nav {
  position: fixed;
  top: var(--header-h);
  right: 0;
  bottom: 0;
  left: 0;
  background: var(--bg-0);
  z-index: 90;
  display: none;
  flex-direction: column;
  padding: var(--sp-5);
  gap: var(--sp-1);
  overflow-y: auto;
}
.mobile-nav:not([hidden]) { display: flex; }
.mobile-nav a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink-0);
  padding: var(--sp-4) var(--sp-2);
  border-bottom: 1px solid var(--border);
}
.mobile-nav__theme-switch { align-self: center; margin-top: var(--sp-5); }
.mobile-nav__theme-switch button { width: 44px; height: 44px; }

@media (min-width: 900px) {
  .site-nav { display: flex; }
  .nav-download span { display: inline; }
  .nav-github { display: inline-flex; }
  .menu-toggle { display: none; }
  .theme-switch.header-theme-switch { display: flex; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-top: var(--sp-8); overflow: hidden; }
.hero__inner { text-align: center; max-width: 760px; }
.eyebrow {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-1);
  margin-bottom: var(--sp-4);
}
.hero h1 { margin-bottom: var(--sp-4); }
.hero__lead {
  font-size: var(--fs-lead);
  color: var(--ink-1);
  max-width: 56ch;
  margin-inline: auto;
}
.hero__lead a { color: var(--ink-0); text-decoration-color: var(--border-strong); text-underline-offset: 3px; }
.hero__ctas {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
  align-items: stretch;
}
.hero__meta {
  margin-top: var(--sp-5);
  font-size: var(--fs-xs);
  color: var(--ink-1);
  font-family: var(--font-mono);
}

.hero__shot { margin-top: var(--sp-8); }
.shot-frame {
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-pop);
  overflow: hidden;
  background: var(--bg-1);
}
.shot-frame img { width: 100%; height: auto; }

@media (min-width: 560px) {
  .hero__ctas { flex-direction: row; justify-content: center; }
}

/* ==========================================================================
   Platform strip
   ========================================================================== */
.platform-strip { padding-block: var(--sp-6); border-bottom: 1px solid var(--border); }
.platform-strip__inner {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  align-items: center;
  text-align: center;
}
.platform-strip__label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-1);
  flex-shrink: 0;
}
.platform-pills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
}
.platform-pills li {
  font-size: var(--fs-sm);
  color: var(--ink-1);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4em 0.9em;
}
.platform-pills a {
  color: var(--ink-0);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
}

@media (min-width: 700px) {
  .platform-strip__inner { flex-direction: row; text-align: left; }
}

/* ==========================================================================
   Section shared
   ========================================================================== */
section.compare-section, section.features, section.showcase, section.download {
  padding-block: var(--sp-9);
}
.compare-section .wrap, .features .wrap, .showcase .wrap, .download .wrap {
  text-align: center;
}
.section-lead {
  color: var(--ink-1);
  font-size: var(--fs-lead);
  max-width: 60ch;
  margin: var(--sp-3) auto 0;
}

.reveal {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: no-preference) {
  .reveal[data-reveal-pending] {
    opacity: 0;
    transform: translateY(16px);
  }
  .reveal {
    transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
  }
}

/* ==========================================================================
   Compare / slider
   ========================================================================== */
.compare-block { margin-top: var(--sp-8); text-align: left; }
.compare-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
}
.compare-block__head h3 { flex-shrink: 0; }
.compare-block__head p { color: var(--ink-1); font-size: var(--fs-sm); }

.compare__frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  background: var(--bg-1);
  cursor: ew-resize;
  touch-action: none;
}
.compare__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}
.compare__img--top {
  clip-path: inset(0 calc(100% - var(--pos, 50%)) 0 0);
}
.compare__handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos, 50%);
  width: 3px;
  background: var(--bg-2);
  transform: translateX(-50%);
  cursor: ew-resize;
}
.compare__handle::before, .compare__handle::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  background: var(--border-strong);
  height: 100%;
}
.compare__grip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-pop);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-0);
  font-size: 1.1rem;
}
.compare__tag {
  position: absolute;
  top: var(--sp-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.4em 0.8em;
  border-radius: 999px;
  background: rgba(18, 18, 18, 0.55);
  color: #f2f2f2;
  backdrop-filter: blur(4px);
  pointer-events: none;
  z-index: 2;
}
.compare__tag--left { left: var(--sp-3); }
.compare__tag--right { right: var(--sp-3); }

.compare-note {
  margin-top: var(--sp-6);
  font-size: var(--fs-xs);
  color: var(--ink-1);
  text-align: center;
}

/* ==========================================================================
   Features
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-7);
  text-align: left;
}
.feature-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
}
.icon--feature {
  width: 26px;
  height: 26px;
  color: var(--ink-0);
  margin-bottom: var(--sp-4);
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: var(--sp-2); }
.feature-card p { color: var(--ink-1); font-size: var(--fs-sm); }

@media (min-width: 640px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 980px) {
  .feature-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ==========================================================================
   Showcase
   ========================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-6);
  margin-top: var(--sp-7);
  text-align: left;
}
.showcase-item picture {
  display: block;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.showcase-item figcaption {
  margin-top: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--ink-1);
}
.showcase-item figcaption strong { color: var(--ink-0); }

@media (min-width: 860px) {
  .showcase-grid { grid-template-columns: 1fr 1fr; }
}

/* ==========================================================================
   Download
   ========================================================================== */
.platform-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
  margin-top: var(--sp-7);
  text-align: left;
}
.platform-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-1);
  min-width: 0;
}
.platform-card .btn { white-space: normal; text-align: center; }
.icon--platform { width: 30px; height: 30px; color: var(--ink-0); margin-bottom: var(--sp-3); }
.platform-card h3 { margin-bottom: 0; }
.platform-card__req { color: var(--ink-1); font-size: var(--fs-xs); margin-bottom: var(--sp-4); }
.platform-card .btn { width: 100%; margin-top: var(--sp-1); }
.platform-card__alt {
  font-size: var(--fs-xs);
  color: var(--ink-1);
  text-decoration: underline;
  text-decoration-color: var(--border-strong);
  text-underline-offset: 3px;
  margin-top: var(--sp-3);
}
.platform-card__alt:hover { color: var(--ink-0); }
.platform-card__alt-row { display: flex; gap: var(--sp-4); margin-top: var(--sp-3); }

@media (min-width: 780px) {
  .platform-cards { grid-template-columns: repeat(3, 1fr); }
}

.callout {
  display: flex;
  gap: var(--sp-3);
  text-align: left;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  margin-top: var(--sp-7);
  color: var(--ink-1);
  font-size: var(--fs-sm);
}
.callout .icon { flex-shrink: 0; width: 22px; height: 22px; margin-top: 2px; color: var(--sky); }
.callout p { margin-bottom: var(--sp-2); }
.callout p:last-of-type { margin-bottom: 0; }
.callout strong { color: var(--ink-0); }
.callout code {
  display: inline-block;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 0.5em 0.7em;
  font-size: var(--fs-xs);
  margin-top: var(--sp-2);
  overflow-wrap: anywhere;
}

.download-fallback { margin-top: var(--sp-6); font-size: var(--fs-sm); }
.download-fallback a {
  color: var(--ink-1);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.download-fallback a:hover { color: var(--ink-0); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { border-top: 1px solid var(--border); padding-block: var(--sp-7); }
.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  align-items: center;
  text-align: center;
}
.footer__brand { text-decoration: none; }
.footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2) var(--sp-5);
  font-size: var(--fs-sm);
}
.footer__links a { text-decoration: none; color: var(--ink-1); }
.footer__links a:hover { color: var(--ink-0); }
.footer__fine { font-size: var(--fs-xs); color: var(--ink-1); max-width: 60ch; }

@media (min-width: 780px) {
  .footer__inner { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* ==========================================================================
   Section heading centering reset on wide screens for readability
   ========================================================================== */
.compare-section h2, .features h2, .showcase h2, .download h2 { max-width: 40ch; margin-inline: auto; }