/* ==========================================================================
   TaskbarFold site
   One accent (azure, the app's own colour), one radius scale, one theme lock
   per page state. No build step: plain CSS custom properties.
   Radius rule: --r-lg cards and figures, --r-md controls, --r-sm chips.
   ========================================================================== */

:root {
  --font-display: "Segoe UI Variable Display", "Segoe UI Variable", "Segoe UI",
                  system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-text: "Segoe UI Variable Text", "Segoe UI Variable", "Segoe UI",
               system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Cascadia Mono", "Cascadia Code", ui-monospace, SFMono-Regular,
               "SF Mono", Consolas, "Liberation Mono", monospace;

  --r-lg: 16px;
  --r-md: 10px;
  --r-sm: 6px;

  --wrap: 1180px;
  --sec-y: clamp(76px, 9vw, 132px);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light ------------------------------------------------------------------ */
[data-theme="light"] {
  --bg: #f7f8fa;
  --bg-alt: #eef0f4;
  --surface: #ffffff;
  --surface-2: #f2f4f7;
  --text: #14161a;
  --text-2: #545c68;
  --text-3: #5f6878;
  --line: rgba(16, 20, 28, 0.11);
  --line-2: rgba(16, 20, 28, 0.06);
  --accent: #0b5bd3;
  --accent-soft: rgba(11, 91, 211, 0.09);
  --accent-line: rgba(11, 91, 211, 0.22);
  --on-accent: #ffffff;
  --shadow-s: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 14px rgba(16, 24, 40, 0.05);
  --shadow-l: 0 2px 6px rgba(16, 24, 40, 0.06), 0 28px 60px rgba(16, 24, 40, 0.12);
  --nav-bg: rgba(247, 248, 250, 0.78);
}

/* Dark ------------------------------------------------------------------- */
[data-theme="dark"] {
  --bg: #0c0d11;
  --bg-alt: #101218;
  --surface: #14161d;
  --surface-2: #191c24;
  --text: #e8eaf0;
  --text-2: #a2a9b7;
  --text-3: #7d8494;
  --line: rgba(255, 255, 255, 0.10);
  --line-2: rgba(255, 255, 255, 0.055);
  --accent: #5a9bff;
  --accent-soft: rgba(90, 155, 255, 0.12);
  --accent-line: rgba(90, 155, 255, 0.30);
  --on-accent: #08101f;
  --shadow-s: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 18px rgba(0, 0, 0, 0.3);
  --shadow-l: 0 2px 8px rgba(0, 0, 0, 0.45), 0 34px 70px rgba(0, 0, 0, 0.5);
  --nav-bg: rgba(12, 13, 17, 0.76);
}

/* Base ------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 640;
  margin: 0;
  letter-spacing: -0.022em;
}

p { margin: 0; }
img { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--on-accent);
  border-radius: var(--r-md);
}
.skip:focus { left: 16px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 44px);
}
.wrap--narrow { max-width: 800px; }

/* Type ------------------------------------------------------------------- */
.display {
  font-size: clamp(2.5rem, 5.6vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 680;
}
.display--sm { font-size: clamp(2.1rem, 4.4vw, 3.2rem); }

.h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  max-width: 20ch;
}

.lead {
  margin-top: 20px;
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  color: var(--text-2);
  max-width: 46ch;
}

.sub {
  margin-top: 18px;
  color: var(--text-2);
  max-width: 62ch;
}

.eyebrow {
  font-size: 0.78rem;
  font-weight: 620;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.link {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-line);
  padding-bottom: 1px;
  transition: border-color 0.2s var(--ease);
}
.link:hover { border-bottom-color: var(--accent); }

/* Buttons ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  white-space: nowrap;
  padding: 11px 20px;
  border-radius: var(--r-md);
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 620;
  font-size: 0.97rem;
  border: 1px solid transparent;
  box-shadow: var(--shadow-s);
  transition: transform 0.18s var(--ease), filter 0.18s var(--ease);
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px) scale(0.99); }
.btn .ph { font-size: 1.15em; }

.btn--lg { padding: 14px 26px; font-size: 1.03rem; }
.btn--sm { padding: 8px 16px; font-size: 0.9rem; }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
  box-shadow: none;
}
.btn--ghost:hover {
  filter: none;
  border-color: var(--accent-line);
  background: var(--accent-soft);
}

.row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 32px;
}

/* Navigation ------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-2);
}

.nav__in {
  height: 66px;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 44px);
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 660;
  letter-spacing: -0.02em;
  font-size: 1.02rem;
}
.brand__mark { width: 26px; height: 26px; flex: none; }
.brand__plate { fill: var(--surface-2); stroke: var(--line); stroke-width: 1; }
.brand__dot { fill: var(--text-3); }
.brand__dot--lit { fill: var(--accent); }

.nav__links {
  display: flex;
  gap: 26px;
  margin-left: auto;
  font-size: 0.94rem;
  color: var(--text-2);
}
.nav__links a { transition: color 0.18s var(--ease); }
.nav__links a:hover { color: var(--text); }

.nav__act {
  display: flex;
  align-items: center;
  gap: 8px;
}

.iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 640;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.iconbtn:hover { color: var(--text); border-color: var(--accent-line); }
.iconbtn .ph { font-size: 1.1rem; }

/* Hero ------------------------------------------------------------------- */
.hero { padding: clamp(56px, 7vw, 92px) 0 clamp(64px, 8vw, 108px); }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(36px, 5vw, 68px);
  align-items: center;
}

.hero__shot { margin: 0; }

/* Screenshot frames ------------------------------------------------------ */
.shot {
  margin: 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-l);
  overflow: hidden;
}
.shot img { width: 100%; }

.shot figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-2);
  font-size: 0.87rem;
  color: var(--text-3);
}

.shot__pending {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 220px;
  padding: 32px 20px;
  text-align: center;
  color: var(--text-3);
  background:
    repeating-linear-gradient(135deg, var(--line-2) 0 1px, transparent 1px 11px),
    var(--surface-2);
}
.shot__pending .ph { font-size: 1.7rem; opacity: 0.6; }
.shot__pending b { font-family: var(--font-mono); font-size: 0.84rem; font-weight: 500; }
.shot__pending span { font-family: var(--font-mono); font-size: 0.78rem; opacity: 0.7; }

/* Statement band --------------------------------------------------------- */
.band {
  padding: var(--sec-y) 0;
  background: var(--bg-alt);
  border-block: 1px solid var(--line-2);
}
.band__title { max-width: 17ch; }
.band__body {
  margin-top: 20px;
  color: var(--text-2);
  max-width: 58ch;
}
.band__pair {
  margin-top: clamp(36px, 5vw, 56px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

/* Sections --------------------------------------------------------------- */
.sec { padding: var(--sec-y) 0; }
.sec--alt { background: var(--bg-alt); border-block: 1px solid var(--line-2); }

section[id] { scroll-margin-top: 84px; }

/* Bento ------------------------------------------------------------------ */
.bento {
  margin-top: clamp(36px, 5vw, 56px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.cell {
  padding: 26px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cell h3 { font-size: 1.12rem; letter-spacing: -0.018em; }
.cell p { color: var(--text-2); font-size: 0.95rem; }

.cell__icon {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 2px;
}

.cell--hero {
  grid-column: span 2;
  grid-row: span 2;
  padding: 0;
  overflow: hidden;
  justify-content: space-between;
  gap: 0;
}
.cell--hero .cell__text { padding: 30px 30px 6px; }
.cell--hero h3 { font-size: 1.5rem; }
.cell--hero p { max-width: 44ch; margin-top: 10px; font-size: 1rem; }
.cell--hero .cell__shot {
  margin: 24px 30px 0;
  border-radius: var(--r-md) var(--r-md) 0 0;
  border: 1px solid var(--line);
  border-bottom: 0;
  box-shadow: none;
  overflow: hidden;
}

.cell--tint {
  background:
    linear-gradient(160deg, var(--accent-soft), transparent 62%),
    var(--surface);
  border-color: var(--accent-line);
}

.keys {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 14px;
}
kbd {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 4px 8px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--text-2);
}

.swatch {
  display: flex;
  width: 58px;
  height: 30px;
  border-radius: var(--r-sm);
  overflow: hidden;
  border: 1px solid var(--line);
  margin-bottom: 6px;
}
.swatch span { flex: 1; }
.swatch span:first-child { background: #f2f4f7; }
.swatch span:last-child { background: #191c24; }

/* How it works ----------------------------------------------------------- */
.how {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
}
.how__vis { position: sticky; top: 100px; }

.how__rail { padding-left: 26px; border-left: 1px solid var(--line); }
.how__rail .h2 { margin-bottom: 12px; }

.step {
  position: relative;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-2);
}
.step:last-child { border-bottom: 0; padding-bottom: 0; }
.step::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 34px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
}
.step h3 { font-size: 1.18rem; }
.step p { margin-top: 8px; color: var(--text-2); max-width: 48ch; }

/* Free band -------------------------------------------------------------- */
.free {
  padding: var(--sec-y) 0;
  background:
    radial-gradient(120% 130% at 12% 0%, var(--accent-soft), transparent 58%),
    var(--bg);
  border-block: 1px solid var(--line-2);
}
.free__in .display--sm { max-width: 16ch; }

.facts {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
}
.facts li {
  padding: 4px 22px 4px 0;
  margin-right: 22px;
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text);
}
.facts li:last-child { border-right: 0; margin-right: 0; }

.free__note {
  margin-top: 28px;
  color: var(--text-2);
  max-width: 56ch;
}

/* Comparison pairs ------------------------------------------------------- */
.pairs { margin-top: clamp(32px, 4vw, 48px); }

.pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 20px 40px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-2);
  align-items: baseline;
}
.pair:last-child { border-bottom: 0; }

.pair__old {
  color: var(--text-3);
  font-size: 0.98rem;
  text-decoration: line-through;
  text-decoration-color: var(--line);
  text-decoration-thickness: 1px;
}
.pair__new {
  color: var(--text);
  font-size: 1.02rem;
  position: relative;
  padding-left: 26px;
}
.pair__new::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 14px;
  height: 1px;
  background: var(--accent);
}

/* FAQ -------------------------------------------------------------------- */
/* Left edge stays aligned with every other section; only the measure is capped. */
.qa {
  max-width: 820px;
  border-bottom: 1px solid var(--line-2);
}
.qa:first-of-type { border-top: 1px solid var(--line-2); margin-top: 36px; }

.qa summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 620;
  font-size: 1.06rem;
  letter-spacing: -0.015em;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary .ph {
  color: var(--text-3);
  transition: transform 0.24s var(--ease);
  flex: none;
}
.qa[open] summary .ph { transform: rotate(180deg); }
.qa p {
  padding-bottom: 22px;
  color: var(--text-2);
  max-width: 64ch;
}

/* Download --------------------------------------------------------------- */
.cta { padding: var(--sec-y) 0; }
.cta__in { text-align: center; }
.cta__in .h2 { max-width: none; }
.cta__in .sub { margin-inline: auto; }
.cta__in .btn { margin-top: 32px; }

.specs {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-3);
}
.specs span {
  padding: 0 16px;
  border-right: 1px solid var(--line);
}
.specs span:last-child { border-right: 0; }

/* Footer ----------------------------------------------------------------- */
.foot {
  padding: 40px 0;
  border-top: 1px solid var(--line-2);
  background: var(--bg-alt);
}
.foot__in {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
}
.foot__links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 0.92rem;
  color: var(--text-2);
}
.foot__links a:hover { color: var(--text); }

/* Reveal on scroll ------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* Responsive ------------------------------------------------------------- */
@media (max-width: 1020px) {
  .nav__links { display: none; }
  .nav__act { margin-left: auto; }

  .hero__grid { grid-template-columns: 1fr; gap: 44px; }
  .lead { max-width: none; }

  .how { grid-template-columns: 1fr; }
  .how__vis { position: static; }

  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cell--hero { grid-column: span 2; grid-row: auto; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .band__pair { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr; }
  .cell--hero { grid-column: auto; }
  .cell--hero .cell__text { padding: 24px 22px 4px; }
  .cell--hero .cell__shot { margin: 20px 22px 0; }
  .cell { padding: 22px; }

  .how__rail { padding-left: 20px; }
  .step::before { left: -25px; }

  .pair { grid-template-columns: 1fr; gap: 8px; }

  .facts li { border-right: 0; margin-right: 0; padding-right: 0; flex: 0 0 50%; }
  .foot__in { flex-direction: column; align-items: flex-start; }
}

/* Reduced motion --------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .nav { background: var(--bg); backdrop-filter: none; -webkit-backdrop-filter: none; }
}

@media print {
  .nav, .foot__links { display: none; }
}