/* Tapedeck — site styles. Values lifted from the app's design system. */

:root {
  color-scheme: dark;

  --ground: #121213;
  --ground-deep: #0d0d0e;

  --accent: #4fd98b;
  --accent-deep: #16a163;
  --interrupt: #d97757;

  --ink-display: #ffffff;
  --ink-title: #f4f4f5;
  --ink-strong: #dcdcde;
  --ink-body: #a9a9ad;
  --ink-label: #8a8a8e;
  --ink-quiet: #77777b;

  --control-fill: rgba(255, 255, 255, 0.085);
  --control-stroke: rgba(255, 255, 255, 0.12);
  --hairline: rgba(255, 255, 255, 0.09);
  --rule: rgba(255, 255, 255, 0.11);
  --glass-edge: rgba(255, 255, 255, 0.16);
  --glass-edge-top: rgba(255, 255, 255, 0.3);

  --radius-card: 26px;
  --radius-control: 14px;

  --font-display: "Bricolage Grotesque", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "Martian Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --shell: 1080px;
  --gutter: 24px;
}

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

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.004em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* The two accent glows the app puts on every screen, plus the grain. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(760px 520px at 18% -6%, rgba(79, 217, 139, 0.16), transparent 68%),
    radial-gradient(620px 480px at 88% 8%, rgba(79, 217, 139, 0.09), transparent 66%),
    radial-gradient(900px 700px at 50% 108%, rgba(79, 217, 139, 0.06), transparent 70%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

img { max-width: 100%; display: block; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}
a:hover { color: #7ce8ac; }

::selection { background: rgba(79, 217, 139, 0.28); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- layout ---------- */

.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.shell--narrow { max-width: 760px; }

section { position: relative; }

.band { padding: 96px 0; }
.band--tight { padding: 64px 0; }

/* ---------- type ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink-display);
  margin: 0 0 0.5em;
  letter-spacing: -0.03em;
  line-height: 1.05;
  text-wrap: balance;
}

h1 { font-size: clamp(38px, 6.4vw, 68px); }
h2 { font-size: clamp(28px, 3.9vw, 40px); letter-spacing: -0.032em; }
h3 { font-size: 19px; letter-spacing: -0.024em; color: var(--ink-title); line-height: 1.25; }
h4 { font-size: 16px; letter-spacing: -0.02em; color: var(--ink-title); }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

.lead {
  font-size: clamp(16.5px, 1.9vw, 19px);
  line-height: 1.55;
  color: var(--ink-body);
  max-width: 34em;
  text-wrap: pretty;
}

.label {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-label);
  margin: 0 0 18px;
}

.mono { font-family: var(--font-mono); letter-spacing: -0.03em; }

.accent { color: var(--accent); }

/* ---------- glass ---------- */

.glass {
  position: relative;
  border-radius: var(--radius-card);
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.028));
  backdrop-filter: blur(30px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  box-shadow: 0 40px 60px -30px rgba(0, 0, 0, 0.85);
}

.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(to bottom, var(--glass-edge-top), var(--glass-edge) 40%, rgba(255, 255, 255, 0.06));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.glass--accent {
  background: linear-gradient(155deg, rgba(79, 217, 139, 0.12), rgba(79, 217, 139, 0.035));
  box-shadow: 0 40px 70px -30px rgba(0, 0, 0, 0.85), 0 0 70px -30px rgba(79, 217, 139, 0.4);
}

.glass--accent::before {
  background: linear-gradient(to bottom, rgba(79, 217, 139, 0.5), rgba(79, 217, 139, 0.26));
}

/* A panel only ever sits nested inside a glass card. */
.panel {
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--rule);
  padding: 16px 18px;
}

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

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 14px 0;
  transition: background 0.3s ease, backdrop-filter 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.nav.is-stuck {
  background: rgba(18, 18, 19, 0.72);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--hairline);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink-display);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.03em;
  margin-right: auto;
}
.brand:hover { color: var(--ink-display); }

.brand img {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.5);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav__links a {
  color: var(--ink-body);
  font-size: 14px;
  font-weight: 500;
}
.nav__links a:hover { color: var(--ink-title); }

@media (max-width: 720px) {
  .nav__links { gap: 18px; }
  .nav__links a.is-optional { display: none; }
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 22px;
  border-radius: var(--radius-control);
  border: 1px solid var(--control-stroke);
  background: var(--control-fill);
  color: var(--ink-title);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform 0.18s cubic-bezier(0.2, 0.9, 0.3, 1), background 0.2s ease, border-color 0.2s ease;
}

.btn:hover { background: rgba(255, 255, 255, 0.13); color: var(--ink-display); }
.btn:active { transform: scale(0.97); }

.btn--accent {
  background: var(--accent);
  border-color: transparent;
  color: #07240f;
  box-shadow: 0 14px 34px -14px rgba(79, 217, 139, 0.7);
}
.btn--accent:hover { background: #5fe098; color: #07240f; }

.btn--quiet { background: transparent; }

/* ---------- hero ---------- */

.hero {
  padding: clamp(56px, 9vw, 110px) 0 clamp(48px, 7vw, 80px);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
}

/* Apple's own badge, served by Apple, so it stays the current artwork.
   Same height as the 51px button beside it. */
.store-badge {
  display: inline-flex;
  border-radius: 10px;
  transition: transform 0.18s cubic-bezier(0.2, 0.9, 0.3, 1);
}
.store-badge:active { transform: scale(0.97); }
.store-badge img { display: block; height: 51px; width: auto; }

.hero__note {
  margin-top: 18px;
  font-size: 13px;
  color: var(--ink-quiet);
}

/* the waveform */

.wave {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 132px;
  margin-top: 56px;
  padding: 0 4px;
}

.wave span {
  flex: 1 1 0;
  max-width: 9px;
  min-width: 3px;
  border-radius: 999px;
  background: linear-gradient(to bottom, var(--accent), rgba(79, 217, 139, 0.45));
  transform-origin: center;
  animation: bar 1900ms cubic-bezier(0.4, 0, 0.2, 1) infinite;
  will-change: transform;
}

@keyframes bar {
  0%, 100% { transform: scaleY(0.22); }
  50% { transform: scaleY(1); }
}

/* ---------- grids ---------- */

.grid {
  display: grid;
  gap: 18px;
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 860px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

.card { padding: 26px 24px 28px; }

.card__icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(79, 217, 139, 0.11);
  border: 1px solid rgba(79, 217, 139, 0.24);
  margin-bottom: 18px;
  color: var(--accent);
}

.card p {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-body);
}

/* ---------- comparison ---------- */

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

@media (max-width: 760px) {
  .split { grid-template-columns: minmax(0, 1fr); }
}

.ticks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ticks li {
  position: relative;
  padding: 11px 0 11px 30px;
  font-size: 14.5px;
  color: var(--ink-strong);
  border-bottom: 1px solid var(--hairline);
}

.ticks li:last-child { border-bottom: 0; padding-bottom: 0; }

.ticks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 17px;
  width: 13px;
  height: 7px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
  border-radius: 1px;
}

/* ---------- price ---------- */

.price {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 4px 0 16px;
}

.price__figure {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 30px;
  letter-spacing: -0.04em;
  color: var(--ink-display);
}

.price__unit { font-size: 13.5px; color: var(--ink-label); }

.fineprint {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink-quiet);
}

/* ---------- faq ---------- */

.faq { border-top: 1px solid var(--hairline); }

.faq details {
  border-bottom: 1px solid var(--hairline);
  padding: 4px 0;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 20px 34px 20px 0;
  position: relative;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15.5px;
  color: var(--ink-title);
  letter-spacing: -0.012em;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink-label);
  border-bottom: 2px solid var(--ink-label);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.25s ease, border-color 0.2s ease;
}

.faq details[open] summary::after {
  transform: translateY(-20%) rotate(-135deg);
  border-color: var(--accent);
}

.faq details p {
  padding: 0 30px 22px 0;
  font-size: 14.5px;
  color: var(--ink-body);
  margin: 0;
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--hairline);
  padding: 44px 0 56px;
  margin-top: 40px;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 28px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin-left: auto;
}

.footer a { color: var(--ink-body); font-size: 13.5px; }
.footer a:hover { color: var(--accent); }

.footer__note {
  font-size: 12.5px;
  color: var(--ink-quiet);
  margin-top: 20px;
}

/* ---------- legal pages ---------- */

.doc { padding: clamp(40px, 6vw, 72px) 0 20px; }

.doc__meta {
  font-size: 12.5px;
  color: var(--ink-quiet);
  margin-bottom: 34px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--hairline);
}

.doc h2 {
  font-size: 22px;
  margin-top: 46px;
  margin-bottom: 14px;
  letter-spacing: -0.026em;
}

.doc h3 {
  font-size: 16px;
  margin-top: 28px;
  margin-bottom: 8px;
}

.doc p, .doc li {
  font-size: 15px;
  line-height: 1.66;
  color: var(--ink-body);
}

.doc ul { padding-left: 20px; margin: 0 0 1.1em; }
.doc li { margin-bottom: 8px; }
.doc li::marker { color: var(--accent); }

.doc strong { color: var(--ink-strong); font-weight: 600; }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 24px;
  font-size: 14px;
}

.doc th, .doc td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}

.doc th {
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-label);
  font-weight: 600;
}

.doc td { color: var(--ink-body); }

.callout {
  padding: 20px 22px;
  margin: 26px 0;
}

.callout p { font-size: 14.5px; margin: 0; color: var(--ink-strong); }

.toc {
  padding: 20px 22px;
  margin-bottom: 34px;
}

.toc ul { list-style: none; padding: 0; margin: 0; columns: 2; column-gap: 26px; }
.toc li { margin-bottom: 7px; font-size: 13.5px; break-inside: avoid; }

@media (max-width: 620px) {
  .toc ul { columns: 1; }
}

/* ---------- reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.9, 0.3, 1), transform 0.7s cubic-bezier(0.22, 0.9, 0.3, 1);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .wave span { animation: none; transform: scaleY(0.6); }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* A whole card that is a link. */
a.card {
  color: inherit;
  display: block;
  transition: transform 0.2s cubic-bezier(0.2, 0.9, 0.3, 1), background 0.25s ease;
}
a.card:hover { transform: translateY(-2px); color: inherit; }
a.card:hover h3 { color: var(--accent); }