@import url("/theme.css");

:root {
  /* Page aliases over the tokens. */
  --df-bg: var(--color-surface-canvas);
  --df-bg-raised: var(--color-surface-raised);
  --df-glass: var(--color-duetflow-glass);
  --df-glass-fill: color-mix(in srgb, var(--df-glass) 62%, transparent);
  --df-glass-blur: 18px;
  --df-hairline: var(--color-border-subtle);
  --df-edge-light: color-mix(in srgb, var(--color-text-primary) 14%, transparent);
  --df-teal: var(--color-accent);
  --df-amber: var(--color-duetflow-partner-text);
  --df-amber-fill: var(--color-duetflow-brand-amber);
  --df-green: var(--color-status-success);
  --df-coral: var(--color-status-danger);
  --df-text: var(--color-text-primary);
  --df-text-secondary: var(--color-text-secondary);
  --df-text-tertiary: var(--color-text-tertiary);
  --df-tint: color-mix(in srgb, var(--color-text-primary) 8%, transparent);
  /* === Typography (SF Pro, system) === */
  --df-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", system-ui, sans-serif;
  --df-weight-regular: 400;
  --df-weight-semibold: 600;
  --df-h1: clamp(2.75rem, 5.5vw, 5rem);
  --df-h2: clamp(2.125rem, 3.6vw, 2.75rem);
  --df-h3: clamp(1.375rem, 2vw, 1.625rem);
  --df-lead: clamp(1.1875rem, 1.6vw, 1.3125rem);
  --df-body: clamp(1rem, 1.1vw, 1.0625rem);
  --df-eyebrow: 0.8125rem;
  --df-tracking-tight: -0.02em;
  --df-tracking-eyebrow: 0.12em;
  --df-leading-head: 1.05;
  --df-leading-body: 1.6;
  --df-measure: 62ch;

  /* === Space (generous, calm) === */
  --df-section-y: clamp(6rem, 10vw, 10rem);
  --df-gap: clamp(1.5rem, 3vw, 2.5rem);
  --df-device-air: clamp(2.5rem, 4vw, 4rem);

  /* === Radius (page-level, larger than the app's card radius on purpose) === */
  --df-radius-card: 20px;
  --df-radius-cta: 14px;
  --df-radius-window: 10px;

  /* === Motion === */
  --df-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --df-dur-reveal: var(--motion-reveal);
  --df-dur-hover: var(--motion-standard);
  --df-glow-drift: 32s;

  /* === Elevation === */
  --df-shadow-card: 0 24px 60px -24px var(--color-duetflow-shadow);
  --df-shadow-device: 0 40px 90px -36px var(--color-duetflow-shadow);
  --df-cta-glow: 0 0 0 1px color-mix(in srgb, var(--df-teal) 35%, transparent), 0 12px 40px -8px color-mix(in srgb, var(--df-teal) 45%, transparent);
  --df-focus-ring: 0 0 0 3px color-mix(in srgb, var(--color-focus) 55%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  :root { --df-dur-reveal: 0ms; --df-glow-drift: 0s; }
  .df-room::before, .df-room::after { animation: none; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: clip; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--df-bg);
  color: var(--df-text);
  font-family: var(--df-font);
  font-size: var(--df-body);
  line-height: var(--df-leading-body);
  font-weight: var(--df-weight-regular);
  overflow-x: clip;
}

:where(a, summary):focus-visible {
  outline: 3px solid var(--df-teal);
  outline-offset: 3px;
}
.df-skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--color-accent-fill);
  color: var(--color-accent-on);
  font-weight: var(--df-weight-semibold);
  text-decoration: none;
  transform: translateY(-160%);
}
.df-skip-link:focus { transform: none; }

/* === Room glows: two light sources, drifting slowly === */
.df-room {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.df-room::before,
.df-room::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  will-change: transform, opacity;
}
.df-room::before {
  width: 80vw; height: 80vw;
  top: -28vw; left: -22vw;
  background: radial-gradient(circle at center, color-mix(in srgb, var(--df-teal) 16%, transparent) 0%, transparent 68%);
  animation: drift-teal var(--df-glow-drift) ease-in-out infinite alternate;
}
.df-room::after {
  width: 78vw; height: 78vw;
  bottom: -30vw; right: -24vw;
  background: radial-gradient(circle at center, color-mix(in srgb, var(--df-amber-fill) 13%, transparent) 0%, transparent 68%);
  animation: drift-amber calc(var(--df-glow-drift) * 1.25) ease-in-out infinite alternate;
}
@keyframes drift-teal {
  from { transform: translate(0,0); opacity: 0.85; }
  to   { transform: translate(3vw, 2vw); opacity: 1; }
}
@keyframes drift-amber {
  from { transform: translate(0,0); opacity: 0.8; }
  to   { transform: translate(-2.5vw, -2vw); opacity: 1; }
}

/* === Layout === */
.df-wrap { position: relative; z-index: 1; }
.df-container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
section { padding-block: var(--df-section-y); position: relative; scroll-margin-top: 5rem; }
.df-measure { max-width: var(--df-measure); }

/* === Header === */
.df-header {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem clamp(1.25rem, 4vw, 2.5rem);
  background: color-mix(in srgb, var(--df-bg) 60%, transparent);
  backdrop-filter: blur(var(--df-glass-blur)) saturate(1.2);
  -webkit-backdrop-filter: blur(var(--df-glass-blur)) saturate(1.2);
  border-bottom: 1px solid var(--df-hairline);
}
.df-wordmark {
  display: inline-flex; align-items: center; gap: 0.55rem;
  min-height: 44px;
  font-weight: var(--df-weight-semibold);
  font-size: 1.05rem; letter-spacing: -0.01em; color: var(--df-text);
  text-decoration: none;
}
.df-marks { display: inline-flex; gap: 4px; }
.df-marks i {
  width: 9px; height: 9px; border-radius: 50%; display: block;
}
.df-marks i:first-child { background: var(--df-teal); box-shadow: 0 0 10px color-mix(in srgb, var(--df-teal) 70%, transparent); }
.df-marks i:last-child  { background: var(--df-amber-fill); box-shadow: 0 0 10px color-mix(in srgb, var(--df-amber-fill) 60%, transparent); }

/* === Section navigation: inline on wide screens, menu on narrow ones === */
.df-header { gap: 1rem; flex-wrap: wrap; }
.df-header-actions { display: flex; align-items: center; gap: 0.5rem; }
/* Icon buttons keep their 44px touch target; the CTA absorbs narrow widths. */
.df-header-actions > .df-langsel, .df-header-actions > .df-menu-toggle { flex-shrink: 0; }
.df-nav { display: flex; gap: 0.25rem; overflow-x: auto; scrollbar-width: none; }
.df-nav a {
  display: inline-flex; align-items: center; min-height: 44px;
  padding: 0 0.7rem; border-radius: 999px; white-space: nowrap;
  color: var(--df-text-secondary); text-decoration: none; font-size: 0.95rem;
}
.df-nav a:hover { color: var(--df-text); }
.df-nav a[aria-current="true"] { color: var(--df-text); background: var(--df-tint); }
.df-langsel {
  /* Globe-only until the header has room for the language name; the native option list always shows names. */
  display: none; width: 44px; height: 44px; padding: 0; border-radius: 999px; cursor: pointer;
  font: inherit; font-size: 1rem; color: transparent; /* >=16px: iOS Safari zooms smaller selects */
  background: transparent url("/img/globe.svg") no-repeat center / 18px;
  border: 1px solid var(--df-hairline); -webkit-appearance: none; appearance: none;
}
.df-langsel option { color: CanvasText; background: Canvas; }
/* Space is reserved from first paint; home.js reveals it once it can navigate. Without JS the footer language nav still works. */
.js .df-langsel { display: inline-block; visibility: hidden; }
.df-langsel.is-ready { visibility: visible; }
.df-langsel:hover { border-color: var(--df-teal); }
.df-langsel:focus-visible { outline: 3px solid var(--df-text); outline-offset: 3px; }
@media (min-width: 1400px) {
  .df-langsel {
    width: auto; max-width: 11rem; padding: 0 2rem 0 0.9rem; color: var(--df-text); text-overflow: ellipsis;
    background: transparent url("/img/chevron-down.svg") no-repeat right 0.85rem center / 0.65rem;
  }
}
/* Forced colors repaint the hidden text over the globe; show the native named select with its own arrow instead. */
@media (forced-colors: active) {
  .df-langsel { width: auto; padding: 0 0.9rem; background-image: none; -webkit-appearance: menulist; appearance: auto; }
}
.df-menu-toggle {
  display: none;
  width: 44px; height: 44px; padding: 0; justify-content: center; border-radius: 999px; cursor: pointer;
  font: inherit; color: var(--df-text); background: transparent;
  border: 1px solid var(--df-hairline);
}
@media (max-width: 1099px) {
  .df-nav { order: 3; width: 100%; }
  .js .df-nav { display: none; flex-direction: column; padding-bottom: 0.5rem; }
  .js .df-header.is-open .df-nav { display: flex; }
  .js .df-menu-toggle { display: inline-flex; align-items: center; }
}
@media (max-width: 430px) {
  .df-header { padding-inline: 1rem; gap: 0.5rem; }
  .df-header-actions .df-cta--sm { padding-inline: 0.85rem; font-size: 0.9rem; }
}

/* === Buttons === */
.df-cta {
  display: inline-flex; align-items: center; gap: 0.5rem;
  min-height: 44px;
  font-family: inherit; font-size: 1rem; font-weight: var(--df-weight-semibold);
  color: var(--color-accent-on); background: var(--color-accent-fill);
  padding: 0.8rem 1.4rem; border-radius: var(--df-radius-cta);
  text-decoration: none; border: 0; cursor: pointer;
  box-shadow: var(--df-cta-glow);
  transition: transform var(--df-dur-hover) var(--df-ease), filter var(--df-dur-hover) var(--df-ease), box-shadow var(--df-dur-hover) var(--df-ease);
}
.df-cta:hover { transform: translateY(-1px); filter: brightness(1.06); box-shadow: 0 0 0 1px color-mix(in srgb, var(--df-teal) 50%, transparent), 0 18px 50px -10px color-mix(in srgb, var(--df-teal) 55%, transparent); }
.df-cta:focus-visible { outline: 3px solid var(--df-text); outline-offset: 3px; box-shadow: var(--df-focus-ring); }
.df-cta--sm { padding: 0.55rem 1rem; font-size: 0.94rem; }
.df-cta--lg { padding: 1rem 1.8rem; font-size: 1.0625rem; }

/* === Typography helpers === */
.df-eyebrow {
  display: inline-block;
  font-size: var(--df-eyebrow); font-weight: var(--df-weight-semibold);
  text-transform: uppercase; letter-spacing: var(--df-tracking-eyebrow);
  color: var(--df-teal); margin: 0 0 1rem;
}
h1, h2, h3 { font-weight: var(--df-weight-semibold); letter-spacing: var(--df-tracking-tight); margin: 0; }
h1 { font-size: var(--df-h1); line-height: var(--df-leading-head); }
h2 { font-size: var(--df-h2); line-height: 1.1; letter-spacing: -0.01em; }
h3 { font-size: var(--df-h3); line-height: 1.2; }
.df-lead { font-size: var(--df-lead); line-height: 1.55; color: var(--df-text-secondary); }
p { margin: 0 0 1.1em; }
.df-body p:last-child { margin-bottom: 0; }
.df-body, .df-body li { color: var(--df-text-secondary); }
.df-body strong { color: var(--df-text); font-weight: var(--df-weight-semibold); }
a { color: var(--df-teal); }

ul.df-list { list-style: none; padding: 0; margin: 1.4em 0; display: grid; gap: 0.85rem; }
ul.df-list li { position: relative; padding-left: 1.6rem; }
ul.df-list li::before {
  content: ""; position: absolute; left: 0; top: 0.6em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--df-teal); box-shadow: 0 0 8px color-mix(in srgb, var(--df-teal) 60%, transparent);
}
ul.df-list.df-list--amber li::before { background: var(--df-amber-fill); box-shadow: 0 0 8px color-mix(in srgb, var(--df-amber-fill) 55%, transparent); }
ul.df-list li b { color: var(--df-text); font-weight: var(--df-weight-semibold); }

/* === Glass card === */
.df-card {
  background: var(--df-glass-fill);
  backdrop-filter: blur(var(--df-glass-blur)) saturate(1.15);
  -webkit-backdrop-filter: blur(var(--df-glass-blur)) saturate(1.15);
  border: 1px solid var(--df-hairline);
  border-top-color: var(--df-edge-light);
  border-radius: var(--df-radius-card);
  box-shadow: var(--df-shadow-card);
  padding: clamp(1.5rem, 3vw, 2.25rem);
}

/* === HERO === */
.df-hero { padding-top: clamp(3.5rem, 7vw, 6rem); text-align: center; }
.df-hero h1 { max-width: 18ch; margin-inline: auto; }
.df-hero .df-lead { max-width: 60ch; margin: 1.5rem auto 0; }

.df-duet {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--df-gap);
  margin: clamp(2.5rem, 5vw, 3.5rem) 0 0;
  text-align: left;
}
@media (max-width: 720px) { .df-duet { grid-template-columns: 1fr; } }
.df-voice { position: relative; }
.df-voice li { font-size: 0.99rem; color: var(--df-text-secondary); }
.df-voice .df-punch { display: block; margin-top: 1rem; font-weight: var(--df-weight-semibold); }
.df-voice--operator { border-top: 2px solid var(--df-teal); }
.df-voice--operator .df-eyebrow { color: var(--df-teal); }
.df-voice--operator .df-punch { color: var(--df-teal); }
.df-voice--operator::after {
  content: ""; position: absolute; inset: -10% -6% 30% -6%; z-index: -1;
  background: radial-gradient(60% 70% at 20% 0%, color-mix(in srgb, var(--df-teal) 12%, transparent), transparent 70%);
}
.df-voice--partner { border-top: 2px solid var(--df-amber-fill); }
.df-voice--partner .df-eyebrow { color: var(--df-amber); }
.df-voice--partner .df-punch { color: var(--df-amber); }
.df-voice--partner::after {
  content: ""; position: absolute; inset: -10% -6% 30% -6%; z-index: -1;
  background: radial-gradient(60% 70% at 80% 0%, color-mix(in srgb, var(--df-amber-fill) 10%, transparent), transparent 70%);
}

.df-resolve {
  position: relative;
  margin: clamp(2.5rem, 5vw, 3.5rem) auto 0;
  text-align: center;
}
.df-resolve::before {
  content: ""; position: absolute; left: 50%; top: -10%; transform: translateX(-50%);
  width: 420px; max-width: 80vw; height: 220px; z-index: -1;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--df-green) 12%, transparent), color-mix(in srgb, var(--df-teal) 10%, transparent) 40%, color-mix(in srgb, var(--df-amber-fill) 8%, transparent) 70%, transparent);
  filter: blur(8px);
}
.df-cta-micro { margin: 1.1rem auto 0; max-width: 52ch; font-size: 0.92rem; color: var(--df-text-tertiary); }

.df-pillars {
  list-style: none; padding: 0; margin: 1.4rem 0 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 0.5rem;
}
.df-pillars li {
  font-size: 0.86rem; color: var(--df-text-secondary);
  border: 1px solid var(--df-hairline); border-radius: 999px; padding: 0.3rem 0.8rem;
}
/* === Section scaffolding === */
.df-section-head { margin-bottom: clamp(2rem, 4vw, 3rem); }
.df-split {
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.df-split--reverse .df-split-media { order: -1; }
@media (max-width: 860px) {
  .df-split { grid-template-columns: 1fr; }
  .df-split--reverse .df-split-media { order: 0; }
}

/* === Device / screenshot placeholder frames === */
.df-frame-note {
  margin-top: 0.85rem; font-size: 0.78rem; color: var(--df-text-tertiary);
  text-align: center; letter-spacing: 0.02em;
}

/* iPhone bezel */
.df-iphone {
  width: min(260px, 70%); margin-inline: auto;
  border-radius: 42px; padding: 10px;
  background: linear-gradient(160deg, var(--color-duetflow-bezel-top), var(--color-duetflow-bezel-bottom));
  border: 1px solid var(--df-hairline);
  box-shadow: var(--df-shadow-device);
  position: relative;
}
.df-iphone::before {
  content: ""; position: absolute; top: 18px; left: 50%; transform: translateX(-50%);
  width: 92px; height: 24px; background: var(--color-duetflow-bezel-island); border-radius: 999px; z-index: 2;
}
.df-iphone .df-screen {
  border-radius: 34px; overflow: hidden; background: var(--df-bg-raised);
  box-shadow: inset 0 0 0 1px var(--df-hairline), inset 0 30px 60px -50px color-mix(in srgb, var(--df-amber-fill) 25%, transparent);
}
.df-iphone .df-ph { min-height: 460px; }

/* Real captured product screenshots dropped into the device frames.
   The macOS captures already carry real window chrome + transparent rounded
   corners, so drop-shadow (alpha-aware) frames them; no fake bar or border.
   The iPhone capture already shows the Dynamic Island, so the bezel hides its
   own fake notch to avoid a double pill. */
.df-shot-mac { display: block; width: 100%; height: auto;
  filter: drop-shadow(0 26px 55px var(--color-duetflow-shadow)); }
.df-iphone--shot::before { display: none; }
.df-iphone .df-screen .df-shot-ios { display: block; width: 100%; height: auto; }

/* Stylised founder portrait (square illustration, no built-in chrome) */
.df-portrait {
  display: block; width: 100%; max-width: 440px; height: auto;
  margin-inline: auto; border-radius: var(--df-radius-window);
  border: 1px solid var(--df-hairline); border-top-color: var(--df-edge-light);
  box-shadow: var(--df-shadow-device);
}

/* === Privacy "Data Not Collected" receipt card === */
.df-receipt { max-width: 420px; }
.df-receipt h3 { font-size: 1.05rem; display: flex; align-items: center; gap: 0.5rem; }
.df-receipt .df-lock { color: var(--df-green); }
.df-receipt .df-receipt-row {
  display: flex; align-items: center; gap: 0.6rem; padding: 0.7rem 0;
  border-top: 1px solid var(--df-hairline); color: var(--df-text-secondary); font-size: 0.95rem;
}
.df-receipt .df-receipt-row:first-of-type { border-top: 0; }
.df-receipt .df-tick { color: var(--df-green); font-weight: 600; }

/* === Pricing === */
.df-pricing { text-align: center; }
.df-price-card { max-width: 560px; margin: clamp(2rem,4vw,3rem) auto 0; text-align: center; position: relative; }
.df-price-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; z-index: -1;
  background: linear-gradient(135deg, color-mix(in srgb, var(--df-teal) 25%, transparent), color-mix(in srgb, var(--df-amber-fill) 18%, transparent));
  filter: blur(14px); opacity: 0.7;
}
.df-price-amount {
  font-size: clamp(3rem, 7vw, 4.25rem); font-weight: var(--df-weight-semibold);
  letter-spacing: -0.02em; font-variant-numeric: tabular-nums; line-height: 1;
  color: var(--df-text); margin: 0.4rem 0 0.2rem;
}
.df-price-once { font-size: 1.05rem; color: var(--df-text-secondary); }
.df-devices { display: flex; justify-content: center; gap: 1.5rem; margin: 1.6rem 0 0.4rem; color: var(--df-text-tertiary); font-size: 0.85rem; }
.df-devices span { display: inline-flex; flex-direction: column; align-items: center; gap: 0.35rem; }
.df-devices .df-glyph { font-size: 1.3rem; color: var(--df-text-secondary); }
.df-family { font-size: 0.9rem; color: var(--df-text-tertiary); margin-top: 0.8rem; }
.df-price-card .df-cta { margin-top: 1.6rem; }
.df-price-bullets { list-style: none; padding: 0; margin: 1.8rem auto 0; max-width: 44ch; display: grid; gap: 0.6rem; text-align: left; }
.df-price-bullets li { color: var(--df-text-secondary); position: relative; padding-left: 1.6rem; font-size: 0.95rem; }
.df-price-bullets li::before { content: "✓"; position: absolute; left: 0; color: var(--df-green); font-weight: 600; }
.df-waitlist { display: grid; gap: 0.85rem; max-width: 440px; margin: 1.7rem auto 0; text-align: left; scroll-margin-top: 6rem; }
.df-waitlist label { font-weight: var(--df-weight-semibold); color: var(--df-text); }
.df-waitlist input[type="email"], .df-waitlist textarea {
  width: 100%; margin-top: 0.4rem; padding: 0.85rem 0.95rem;
  border: 1px solid var(--color-border-strong); border-radius: 10px;
  background: var(--color-surface-sunken); color: var(--df-text);
  font: inherit;
}
.df-waitlist input[type="email"]::placeholder, .df-waitlist textarea::placeholder { color: var(--df-text-tertiary); }
.df-waitlist input:focus-visible, .df-waitlist textarea:focus-visible, .df-waitlist button:focus-visible {
  outline: 3px solid var(--df-teal); outline-offset: 3px;
}
.df-consent {
  display: grid; grid-template-columns: auto 1fr; align-items: start; gap: 0.65rem;
  color: var(--df-text-secondary) !important; font-size: 0.83rem !important;
  font-weight: var(--df-weight-regular) !important; line-height: 1.5;
}
.df-consent input { width: 18px; height: 18px; margin: 0.15rem 0 0; accent-color: var(--df-teal); }
.df-email-scope { display: grid; gap: 0.65rem; margin: 0.2rem 0; padding: 0; border: 0; }
.df-email-scope legend { margin-bottom: 0.35rem; font-weight: var(--df-weight-semibold); }
.df-email-scope .df-consent { padding: 0.7rem 0.8rem; border: 1px solid var(--df-hairline); border-radius: 10px; background: color-mix(in srgb, var(--color-surface-sunken) 60%, transparent); }
.df-waitlist .df-cta { width: 100%; justify-content: center; margin-top: 0.2rem; border: 0; font: inherit; cursor: pointer; }
.df-form-note { color: var(--df-text-tertiary); font-size: 0.8rem; text-align: center; margin: 0; }
/* Anonymous homepage question: the redirect lands on #ask-thanks, which swaps the form for the thank-you line without JavaScript. */
.df-ask { text-align: center; }
.df-ask .df-lead { max-width: 48ch; margin-inline: auto; }
.df-ask-form textarea { display: block; resize: vertical; min-height: 7rem; font-weight: var(--df-weight-regular); line-height: 1.5; }
.df-ask-form input[type="email"] { display: block; font-weight: var(--df-weight-regular); }
.df-ask-form .df-form-note a { color: var(--df-teal); }
.df-ask-thanks { display: none; margin: 1.7rem auto 0; max-width: 44ch; padding: 1rem 1.2rem; border: 1px solid var(--df-hairline); border-radius: 14px; color: var(--df-text); background: color-mix(in srgb, var(--df-glass) 40%, transparent); }
/* Success without JS: /api/feedback redirects to #ask-thanks, which targets the section container so the browser scrolls to the question, not under the sticky header. */
.df-ask [id="ask-thanks"] { scroll-margin-top: 5rem; }
.df-ask:has(#ask-thanks:target) .df-ask-thanks { display: block; }
.df-ask:has(#ask-thanks:target) .df-ask-form { display: none; }
.df-honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

/* === FAQ === */
.df-faq-list { display: grid; gap: 0.75rem; margin-top: clamp(1.5rem,3vw,2.5rem); }
.df-faq {
  border: 1px solid var(--df-hairline); border-radius: 14px;
  background: color-mix(in srgb, var(--df-glass) 40%, transparent); overflow: hidden;
}
.df-faq summary {
  list-style: none; cursor: pointer; padding: 1.1rem 1.3rem;
  font-weight: var(--df-weight-semibold); color: var(--df-text);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-size: 1.0rem;
}
.df-faq summary::-webkit-details-marker { display: none; }
.df-faq summary::after { content: "+"; color: var(--df-teal); font-size: 1.3rem; line-height: 1; flex: none; transition: transform var(--df-dur-hover) var(--df-ease); }
.df-faq[open] summary::after { transform: rotate(45deg); }
.df-faq .df-faq-body { padding: 0 1.3rem 1.2rem; color: var(--df-text-secondary); font-size: 0.97rem; }
.df-faq .df-faq-body p { margin: 0; }
.df-faq .df-faq-body ol { margin: 0.6rem 0; padding-left: 1.4rem; }
.df-faq .df-faq-body ol li { margin: 0.25rem 0; }
.df-faq .df-faq-body ol li b { color: var(--df-text); font-weight: var(--df-weight-semibold); }

/* === Guides === */
.df-guides { background: var(--df-bg-raised); }
.df-guide-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem;
  margin-top: 2rem;
}
.df-guide-card {
  display: flex; min-height: 100%; flex-direction: column;
  border: 1px solid var(--df-hairline); border-top-color: var(--df-edge-light);
  border-radius: 15px; background: var(--df-glass-fill); padding: 1.3rem;
  color: var(--df-text); text-decoration: none; transition: border-color var(--df-dur-hover) var(--df-ease), transform var(--df-dur-hover) var(--df-ease);
}
.df-guide-card:hover {
  border-color: color-mix(in srgb, var(--df-teal) 48%, transparent); text-decoration: none; transform: translateY(-2px);
}
.df-guide-card h3 {
  margin: 0; color: var(--df-text); font-size: 1.14rem; line-height: 1.3;
}
.df-guide-card p {
  margin: 0.7rem 0 1.15rem; color: var(--df-text-secondary); font-size: 0.94rem;
}
.df-guide-card span { margin-top: auto; color: var(--df-teal); font-weight: 650; }
.df-guides-all { margin-top: 1rem; }
.df-guides-all a { color: var(--df-teal); font-weight: 650; }
@media (max-width: 760px) {
  .df-guide-grid { grid-template-columns: 1fr; }
}

/* === Final CTA + footer === */
.df-final { text-align: center; position: relative; }
.df-final::before {
  content: ""; position: absolute; left: 50%; top: 10%; transform: translateX(-50%);
  width: 640px; max-width: 90vw; height: 380px; z-index: -1;
  background: radial-gradient(closest-side, color-mix(in srgb, var(--df-teal) 14%, transparent), color-mix(in srgb, var(--df-amber-fill) 10%, transparent) 55%, transparent 75%);
  filter: blur(10px);
}
.df-final h2 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
.df-final .df-lead { margin: 1.2rem auto 2rem; max-width: 48ch; }
.df-footer {
  border-top: 1px solid var(--df-hairline);
  padding: 2.5rem 0 3rem; text-align: center; color: var(--df-text-tertiary); font-size: 0.88rem;
}
.df-footer a { color: var(--df-text-secondary); }
.df-footer .df-footer-marks { margin-bottom: 1rem; }
.df-footer p { margin: 0.3rem 0; }

.dfm-i { width: 1.05em; height: 1.05em; flex: none; vertical-align: -0.16em; }

/* === Scroll reveal === */
.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity var(--df-dur-reveal) var(--df-ease), transform var(--df-dur-reveal) var(--df-ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } }

/* === Language nav + suggest-only banner === */
.df-langs p { margin-top: 0.8rem; line-height: 1.9; }
.df-langs a[aria-current] { color: var(--df-text); }
.df-langbanner {
  position: fixed; left: 50%; bottom: 1rem; transform: translateX(-50%); z-index: 60;
  display: flex; align-items: center; gap: 0.5rem; max-width: calc(100% - 2rem);
  padding: 0.45rem 0.45rem 0.45rem 1rem; border-radius: 999px;
  background: var(--df-glass); border: 1px solid var(--df-hairline);
  box-shadow: 0 8px 30px var(--color-duetflow-shadow); font-size: 0.92rem;
}
.df-langbanner a { color: var(--df-teal); font-weight: 600; }
.df-langbanner button {
  width: 2rem; height: 2rem; border-radius: 50%; border: 0; cursor: pointer;
  background: transparent; color: var(--df-text-secondary); font-size: 1.2rem; line-height: 1;
}
.df-langbanner button:hover { background: var(--df-tint); }

/* CJK: break at phrase/word boundaries instead of mid-word. */
:lang(ja) { word-break: auto-phrase; }
:lang(ko) { word-break: keep-all; }
/* 18ch is only ~9 full-width CJK glyphs; size the hero heading in em instead. */
:is(:lang(ja), :lang(ko), :lang(zh)) .df-hero h1 { max-width: 11em; font-size: min(var(--df-h1), 9vw); }

/* === Proof: the same task on Mac and iPhone === */
.df-proof {
  display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 0.8fr); gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end; margin-top: clamp(2rem, 4vw, 3rem);
}
.df-proof .df-eyebrow { margin-bottom: 0.7rem; }
.df-proof-iphone { text-align: center; }
.df-proof .df-iphone { width: min(260px, 100%); }
@media (max-width: 860px) {
  .df-proof { grid-template-columns: 1fr; align-items: start; }
  .df-proof-iphone { max-width: 360px; margin: 0 auto; }
}