/* ==========================================================================
   Fio Landing — tryfio.app
   Single-page landing: hero, how-it-works, FAQ, final CTA, footer.
   Mobile-first. Light-mode only. No build step.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Palette — inferred from reference composition (sky-blue + cream rope). */
  --color-canvas: #C4DEEB;          /* hero sky-blue background */
  --color-canvas-deep: #AFCFE0;     /* subtle vignette bottom */
  --color-canvas-soft: #F4F6F5;     /* section backgrounds (below hero) */
  --color-paper: #FBF6EB;           /* episode card cream */
  --color-paper-hi: #FFFDF6;        /* card highlight */
  --color-ink: #0A0F17;             /* primary text, near-black charcoal */
  --color-ink-2: #2A3444;           /* secondary ink */
  --color-graphite: #5B6B7D;        /* muted metadata */
  --color-slate: #56677A;           /* mono kicker / card meta */
  --color-hairline: #D5DFE7;        /* card borders */
  --color-hairline-paper: #E9E1CE;  /* card inner hairlines */
  --color-button: #0A0F17;          /* primary CTA fill */
  --color-button-hover: #1C2432;
  --color-input: #FFFFFF;
  --color-focus: #0A0F17;
  --color-error: #8A1F16;

  /* Glass panels */
  --glass-fill: rgba(229, 244, 250, 0.10);
  --glass-fill-hi: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.46);
  --glass-border-low: rgba(83, 118, 142, 0.08);
  --glass-shadow: 0 28px 90px -58px rgba(9, 30, 45, 0.42), 0 10px 34px -30px rgba(9, 30, 45, 0.18);
  --glass-inner-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.82), inset 0 -1px 0 rgba(83, 118, 142, 0.06);
  --glass-radius: clamp(26px, 4.2vw, 56px);
  --page-margin: clamp(16px, 4vw, 64px);

  /* Typography stacks */
  --font-serif: "Fraunces", "Iowan Old Style", "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Scale */
  --size-kicker: 13px;
  --size-h1: clamp(44px, 7vw, 96px);
  --size-h2: clamp(28px, 3.2vw, 42px);
  --size-h3: 22px;
  --size-body: clamp(16px, 1.2vw, 19px);
  --size-meta: 13px;
  --size-sm: 14px;

  /* Spacing */
  --gutter: 24px;
  --gutter-lg: 64px;
  --section-pad: clamp(72px, 9vw, 140px);
  --radius-card: 22px;
  --radius-input: 14px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-quick: 180ms;
  --dur-base: 420ms;
  --dur-slow: 700ms;

  /* Shadow */
  --shadow-card: 0 40px 80px -30px rgba(15, 28, 48, 0.22), 0 4px 14px -6px rgba(15, 28, 48, 0.08);
  --shadow-card-hover: 0 50px 100px -30px rgba(15, 28, 48, 0.28), 0 6px 18px -6px rgba(15, 28, 48, 0.1);
}

/* --------------------------------------------------------------------------
   Reset & base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--size-body);
  line-height: 1.55;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  overflow-x: hidden;
}

main {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  padding-bottom: clamp(16px, 2.4vw, 28px);
}

h1, h2, h3, h4 { margin: 0; font-weight: 400; letter-spacing: -0.02em; }
p { margin: 0; }
ol, ul { list-style: none; margin: 0; padding: 0; }

a { color: inherit; text-decoration: none; transition: opacity var(--dur-quick) var(--ease-out); }
a:hover { opacity: 0.7; }
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: 8px;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  padding: 0;
}

input, button { font-family: inherit; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* --------------------------------------------------------------------------
   Layout helpers
   -------------------------------------------------------------------------- */
.site-nav,
.hero__inner,
.how-it-works,
.faq,
.final-cta,
.site-footer__inner {
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.hero__inner,
.how-it-works,
.faq,
.final-cta,
.site-footer__inner {
  width: min(1280px, calc(100% - (var(--page-margin) * 2)));
}

@media (min-width: 900px) {
  .site-nav,
  .hero__inner,
  .how-it-works,
  .faq,
  .final-cta,
  .site-footer__inner {
    padding-inline: var(--gutter-lg);
  }
}

/* --------------------------------------------------------------------------
   Rope background — fixed to the viewport so it stays visible at every
   scroll position. Source PNG was chroma-keyed (assets/process-rope.py)
   so the black is real alpha and the cream tone is preserved exactly.

   Desktop mirroring keeps the static composition aligned with the original
   design, without tying the rope to scroll position.
   -------------------------------------------------------------------------- */
.rope-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background-image: url("assets/rope.png");
  background-repeat: no-repeat;
  background-position: 50% 50%;
  background-size: cover;
  transform-origin: 50% 50%;
}

@media (min-width: 960px) {
  .rope-bg { transform: scaleX(-1); }
}

@media (max-width: 640px) {
  .rope-bg { opacity: 0.85; }
}

/* Hero is no longer the only home of the rope — keep stacking simple. */
.hero { position: relative; overflow: visible; }

/* Section panels sit above the fixed rope background. */

/* --------------------------------------------------------------------------
   Wordmark / nav
   -------------------------------------------------------------------------- */
.site-nav {
  position: relative;
  z-index: 3;
  padding-top: 28px;
  padding-bottom: 0;
  display: flex;
  align-items: center;
}

.wordmark {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}
.wordmark:hover { opacity: 0.85; }
.wordmark--sm { font-size: 20px; }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: clamp(40px, 6vw, 68px);
  padding-bottom: 0;
  min-height: calc(100vh - 80px);
  z-index: 2;
}

.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 64px;
  grid-template-columns: 1fr;
  align-items: center;
}

@media (min-width: 960px) {
  .hero {
    min-height: 100vh;
    padding-top: clamp(42px, 5vw, 70px);
    padding-bottom: 0;
  }
  .hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 80px;
    min-height: calc(100vh - 96px);
  }
}

.hero__content { position: relative; z-index: 2; }

/* Kicker */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--size-kicker);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-slate);
  margin-bottom: 40px;
}
.kicker__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-slate);
  display: inline-block;
}

/* Headline */
.hero__headline {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: var(--size-h1);
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--color-ink);
  margin-bottom: 28px;
  max-width: 12ch;
  font-variation-settings: "opsz" 120;
}

/* Subhead */
.hero__subhead {
  font-size: clamp(17px, 1.35vw, 21px);
  line-height: 1.5;
  color: var(--color-ink-2);
  max-width: 44ch;
  margin-bottom: 36px;
}

/* Email form */
.email-form {
  display: flex;
  align-items: stretch;
  gap: 0;
  flex-wrap: wrap;
  background: var(--color-input);
  border-radius: var(--radius-input);
  padding: 6px;
  max-width: 520px;
  box-shadow: 0 2px 0 rgba(10, 15, 23, 0.02), 0 12px 32px -18px rgba(10, 15, 23, 0.14);
  border: 1px solid rgba(15, 28, 48, 0.06);
  margin-bottom: 14px;
}
.email-form input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  padding: 14px 14px;
  font-size: 16px;
  color: var(--color-ink);
}
.email-form input::placeholder { color: #9BA6B2; }
.email-form input:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 10px;
}
.email-form button {
  flex: 0 0 auto;
  background: var(--color-button);
  color: #fff;
  font-weight: 500;
  font-size: 15px;
  padding: 13px 22px;
  border-radius: 10px;
  transition: background var(--dur-quick) var(--ease-out), transform var(--dur-quick) var(--ease-out);
}
.email-form button:hover { background: var(--color-button-hover); }
.email-form button:active { transform: translateY(1px); }

.email-form.is-submitting button { opacity: 0.7; pointer-events: none; }
.email-form.is-success {
  justify-content: center;
  padding: 18px;
}
.email-form.is-success input,
.email-form.is-success button { display: none; }
.email-form__status {
  display: none;
  flex: 1 0 100%;
  font-size: 15px;
  color: var(--color-ink-2);
  text-align: center;
  padding: 8px 12px 4px;
}
.email-form.is-success .email-form__status,
.email-form.is-error .email-form__status,
.email-form.is-submitting .email-form__status { display: block; }
.email-form.is-error .email-form__status { color: var(--color-error); }

@media (max-width: 520px) {
  .email-form {
    flex-direction: column;
    gap: 8px;
    padding: 8px;
  }
  .email-form input,
  .email-form button {
    width: 100%;
  }
  .email-form__status {
    text-align: left;
    padding-inline: 8px;
  }
}

/* Fine print + ghost link */
.fine-print {
  font-size: 13px;
  color: var(--color-graphite);
  margin-bottom: 28px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.dot-sep { color: var(--color-graphite); opacity: 0.5; }

.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  color: var(--color-ink);
  border-bottom: 1px solid rgba(10, 15, 23, 0.2);
  padding-bottom: 2px;
  transition: border-color var(--dur-quick) var(--ease-out);
}
.ghost-link:hover { opacity: 1; border-color: var(--color-ink); }

/* --------------------------------------------------------------------------
   Episode card (hero right side)
   -------------------------------------------------------------------------- */
.episode-card {
  position: relative;
  z-index: 2;
  background: var(--color-paper);
  border-radius: var(--radius-card);
  padding: 36px 36px 28px;
  border: 1px solid var(--color-hairline-paper);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--dur-base) var(--ease-out), transform var(--dur-slow) var(--ease-out);
  transform-style: preserve-3d;
  will-change: transform;
  max-width: 520px;
  justify-self: center;
  width: 100%;
}

@media (min-width: 960px) {
  .episode-card {
    justify-self: end;
    transform: rotate(1.5deg);
  }
  .episode-card:hover { box-shadow: var(--shadow-card-hover); }
}

.episode-card__meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-slate);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.em-dash { opacity: 0.5; }

.episode-card__title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(24px, 2.2vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-ink);
  margin-bottom: 14px;
  font-variation-settings: "opsz" 48;
}

.episode-card__provenance {
  font-size: 14px;
  color: var(--color-graphite);
  margin-bottom: 22px;
}
.episode-card__provenance strong { color: var(--color-ink-2); font-weight: 500; }

.episode-card__hosts {
  display: flex;
  gap: 10px;
  margin-bottom: 26px;
  flex-wrap: wrap;
}
.host-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--color-hairline-paper);
  border-radius: var(--radius-pill);
  padding: 4px 14px 4px 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.09em;
  color: var(--color-ink-2);
}
.host-chip__avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: #EEE7D4;
  border: 1px solid var(--color-hairline-paper);
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-ink);
}
.host-chip--sam .host-chip__avatar { background: #E6EEF4; }

/* Audio player */
.player {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-paper-hi);
  border: 1px solid var(--color-hairline-paper);
  border-radius: 18px;
  padding: 14px 18px 14px 14px;
  margin-bottom: 16px;
}

.player__button {
  flex: 0 0 auto;
  width: 54px; height: 54px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--color-hairline-paper);
  box-shadow: inset 0 0 0 2px rgba(140, 170, 200, 0.08), 0 4px 10px -4px rgba(15, 28, 48, 0.14);
  display: grid;
  place-items: center;
  color: var(--color-ink);
  transition: transform var(--dur-quick) var(--ease-out), box-shadow var(--dur-quick) var(--ease-out);
  position: relative;
}
.player__button:hover { transform: scale(1.03); box-shadow: inset 0 0 0 2px rgba(140, 170, 200, 0.12), 0 6px 14px -4px rgba(15, 28, 48, 0.2); }
.player__button:active { transform: scale(0.98); }
.player__button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  box-shadow: none;
}
.player__button:disabled:hover,
.player__button:disabled:active {
  transform: none;
}

.player__icon { width: 20px; height: 20px; fill: currentColor; }
.player__icon--play { display: block; margin-left: 2px; }
.player__icon--pause { display: none; }
.player__button[aria-pressed="true"] .player__icon--play { display: none; }
.player__button[aria-pressed="true"] .player__icon--pause { display: block; margin-left: 0; }

.player__track {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.player__waveform {
  height: 28px;
  display: flex;
  align-items: center;
  gap: 2px;
  overflow: hidden;
}
.player__waveform span {
  flex: 1 1 auto;
  background: var(--color-graphite);
  opacity: 0.35;
  border-radius: 2px;
  transition: opacity var(--dur-quick) var(--ease-out), background var(--dur-quick) var(--ease-out);
}
.player__waveform span.is-played { background: var(--color-ink); opacity: 1; }

.player__labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--color-slate);
}
.player__label-left { display: inline-flex; align-items: center; gap: 7px; }
.player__dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--color-slate);
  display: inline-block;
}

.episode-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-slate);
  padding-left: 2px;
}

/* --------------------------------------------------------------------------
   How it works
   -------------------------------------------------------------------------- */
.how-it-works {
  padding-block: var(--section-pad);
  background: transparent;
  position: relative;
  z-index: 1;
}

.section-heading {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: var(--size-h2);
  line-height: 1.1;
  letter-spacing: -0.03em;
  text-align: center;
  max-width: 20ch;
  margin-inline: auto;
  margin-bottom: 72px;
  font-variation-settings: "opsz" 72;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
  max-width: 1040px;
  margin-inline: auto;
}

@media (min-width: 820px) {
  .steps { grid-template-columns: repeat(3, 1fr); gap: 48px; }
}

.step { text-align: left; }
.step__glyph {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: start;
  color: var(--color-ink);
  margin-bottom: 24px;
}
.step__glyph svg { width: 24px; height: 24px; }

.step__title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.step__body {
  font-size: 16px;
  color: var(--color-ink-2);
  line-height: 1.55;
  max-width: 32ch;
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq {
  padding-block: var(--section-pad);
  background: transparent;
  border-top: 0;
  position: relative;
  z-index: 1;
}

.faq__list {
  max-width: 920px;
  margin-inline: auto;
  border-top: 1px solid rgba(10, 15, 23, 0.08);
}

.faq__item {
  border-bottom: 1px solid rgba(10, 15, 23, 0.08);
}
.faq__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 4px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  transition: color var(--dur-quick) var(--ease-out);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary:hover { color: var(--color-ink-2); }

.faq__icon {
  width: 14px; height: 14px;
  position: relative;
  flex: 0 0 auto;
  margin-left: 16px;
}
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 14px;
  height: 1.5px;
  background: var(--color-ink);
  transform-origin: center;
  transition: transform var(--dur-base) var(--ease-out);
}
.faq__icon::after { transform: rotate(90deg); }
.faq__item[open] .faq__icon::after { transform: rotate(0deg); }

.faq__body {
  overflow: hidden;
  padding-bottom: 22px;
  padding-right: 40px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-ink-2);
}
.faq__body p { margin: 0; }

/* --------------------------------------------------------------------------
   Final CTA
   -------------------------------------------------------------------------- */
.final-cta {
  padding-block: var(--section-pad);
  background: transparent;
  text-align: center;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.final-cta__heading {
  margin-bottom: 16px;
}
.final-cta__sub {
  color: var(--color-ink-2);
  margin-bottom: 36px;
  font-size: 18px;
}

.email-form--centered {
  margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background: transparent;
  border-top: 0;
  padding-block: 0 clamp(16px, 2.4vw, 28px);
  position: relative;
  z-index: 1;
}
.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
}
@media (min-width: 640px) {
  .site-footer__inner { flex-direction: row; }
}
.site-footer__brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
  color: var(--color-ink-2);
}
.site-footer__copy {
  font-size: 13px;
  color: var(--color-graphite);
}
.site-footer__nav {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--color-ink-2);
}
.site-footer__nav a { transition: opacity var(--dur-quick) var(--ease-out); }

/* --------------------------------------------------------------------------
   Glass panels
   -------------------------------------------------------------------------- */
.hero__inner,
.how-it-works,
.faq,
.final-cta,
.site-footer__inner {
  background:
    linear-gradient(145deg, var(--glass-fill-hi), rgba(255, 255, 255, 0) 38%),
    linear-gradient(180deg, var(--glass-fill), rgba(216, 238, 247, 0.04));
  border: 1px solid var(--glass-border);
  border-bottom-color: var(--glass-border-low);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), var(--glass-inner-shadow);
  -webkit-backdrop-filter: blur(6px) saturate(1.02);
  backdrop-filter: blur(6px) saturate(1.02);
}

.hero__inner {
  padding-block: clamp(44px, 7vw, 86px);
}

.how-it-works,
.faq,
.final-cta {
  padding-block: clamp(52px, 7vw, 92px);
}

.site-footer__inner {
  padding-block: clamp(22px, 3vw, 34px);
}

@media (min-width: 820px) {
  .step {
    padding-inline: clamp(8px, 1.8vw, 28px);
  }

  .step + .step {
    border-left: 1px solid rgba(10, 15, 23, 0.09);
  }
}

@media (max-width: 640px) {
  .hero__inner,
  .how-it-works,
  .faq,
  .final-cta,
  .site-footer__inner {
    border-radius: 28px;
    -webkit-backdrop-filter: blur(4px) saturate(1.01);
    backdrop-filter: blur(4px) saturate(1.01);
  }

  .how-it-works,
  .faq,
  .final-cta {
    padding-block: 44px;
  }
}

/* --------------------------------------------------------------------------
   Reveal animations (set by JS via IntersectionObserver)
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .episode-card { transform: none !important; }
}

/* --------------------------------------------------------------------------
   Post-launch state (toggle via `<body data-launch-state="live">`)
   Swap waitlist form for App Store badge when Fio ships.
   -------------------------------------------------------------------------- */
body[data-launch-state="live"] .fine-print { display: none; }
body[data-launch-state="live"] .email-form {
  background: transparent;
  border: 0;
  box-shadow: none;
  padding: 0;
}
body[data-launch-state="live"] .email-form input { display: none; }
/* Button becomes a full-width App Store-styled CTA.
   For a true Apple-compliant badge, replace with <img src="…/app-store-badge.svg">. */