/* AI Tennis Coach design system.
   Restraint first. One accent (optic yellow), used as punctuation only.
   Motion on transform/opacity only. Zero layout shift. */

:root {
  --paper: #F7F7F4;
  --paper-2: #FFFFFF;
  --ink: #14261C;
  --ink-1: #22362B;
  --ink-soft: #56655B;
  --ink-faint: #8A968E;
  --line: #E5E7E1;
  --line-strong: #D6D9D1;
  --accent: #D6F84C;
  --accent-ink: #23310A;
  --danger: #A8412B;
  --ok: #2F6B3D;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --shadow-1: 0 1px 2px rgba(20,38,28,.06);
  --shadow-2: 0 8px 24px -12px rgba(20,38,28,.22);

  --z-base: 1;
  --z-sticky: 100;
  --z-overlay: 500;
  --z-modal: 600;

  --font-display: "Bricolage Grotesque", "Hanken Grotesk", system-ui, sans-serif;
  --font-body: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1120px;
  --ease-out: cubic-bezier(.16,.84,.44,1);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 4px; }
.skip-link { position: fixed; z-index: 1000; left: 16px; top: -60px; padding: 10px 14px; border-radius: var(--radius-sm); background: var(--ink); color: var(--paper); font-weight: 600; }
.skip-link:focus { top: 16px; }
.mono { font-family: var(--font-mono); font-feature-settings: "tnum" 1; }
.tnum { font-variant-numeric: tabular-nums; }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }
.section { padding-block: clamp(64px, 9vw, 120px); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em;
  text-transform: uppercase; color: var(--ink-soft);
  padding: 6px 12px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill); background: var(--paper-2);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.section-kicker {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-faint);
}

/* ---------- type ---------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.02; margin: 0; text-wrap: balance; letter-spacing: -0.015em; }
.h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); }
.h2 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
.h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
.lead { font-size: clamp(1.05rem, 1.5vw, 1.22rem); color: var(--ink-soft); text-wrap: pretty; max-width: 46ch; }
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-faint); }
p { text-wrap: pretty; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding-inline: 20px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 14.5px; border: 1px solid transparent;
  transition: transform .15s var(--ease-out), background-color .15s var(--ease-out), border-color .15s var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #0E1D15; }
.btn-primary .arrow { transition: transform .15s var(--ease-out); }
.btn-primary:hover .arrow { transform: translateX(3px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { background: var(--paper-2); border-color: var(--ink-soft); }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { filter: brightness(.97); }
.btn-block { width: 100%; }
.btn-sm { height: 36px; padding-inline: 14px; font-size: 13px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, var(--line)); }
.btn-danger:hover { color: #7A2B1C; border-color: var(--danger); background: #FFF6F3; }
.link-underline { color: var(--ink); border-bottom: 1px solid var(--line-strong); padding-bottom: 1px; }
.link-underline:hover { border-color: var(--ink); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: var(--z-sticky);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease-out), background-color .2s var(--ease-out);
}
.nav.is-scrolled { border-color: var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: flex-start; gap: 28px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.brand .mark { width: 26px; height: 26px; }
.nav-links { display: flex; align-items: center; gap: 8px; flex: 1; }
.nav-inner a.navlink { padding: 8px 12px; border-radius: var(--radius-sm); color: var(--ink-soft); font-size: 14.5px; font-weight: 500; }
.nav-inner a.navlink:hover { color: var(--ink); background: var(--paper-2); }
.nav-inner a.navlink[aria-current="page"] { color: var(--ink); background: var(--paper-2); box-shadow: inset 0 -2px 0 var(--accent); }
.nav-inner a.nav-login { margin-left: auto; background: var(--ink); color: var(--paper); font-weight: 600; }
.nav-inner a.nav-login:hover { background: #0E1D15; color: var(--paper); }

/* ---------- hero ---------- */
.hero { padding-top: clamp(40px, 6vw, 72px); padding-bottom: clamp(36px, 5vw, 60px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { margin-top: 22px; }
.hero .accent-word { position: relative; white-space: nowrap; }
.hero .accent-word::after {
  content: ""; position: absolute; left: -2px; right: -2px; bottom: .1em; height: .34em;
  background: var(--accent); z-index: -1; border-radius: 2px;
}
.hero .lead { margin-top: 22px; }
.hero-cta { display: flex; align-items: center; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-trust { display: flex; align-items: center; gap: 22px; margin-top: 34px; flex-wrap: wrap; }
.trust-item { display: flex; flex-direction: column; gap: 2px; }
.trust-item .k { font-family: var(--font-mono); font-size: 13px; color: var(--ink); }
.trust-item .v { font-size: 12.5px; color: var(--ink-faint); }
.trust-sep { width: 1px; height: 30px; background: var(--line); }

/* ---------- signature: focus readout ---------- */
.readout {
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-2);
}
.readout-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.readout-head .tag { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-faint); }
.pill-priority { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: .05em; padding: 4px 9px; border-radius: var(--radius-pill); border: 1px solid var(--line-strong); color: var(--ink-soft); }
.pill-priority.high { border-color: #E3C9BF; color: var(--danger); background: #FBF2EF; }

.swing { margin: 26px 2px 4px; }
.swing svg { width: 100%; height: auto; display: block; overflow: visible; }
.swing-line { stroke: var(--line-strong); stroke-width: 2.5; stroke-linecap: round; fill: none; }
.swing-dot { fill: var(--accent); }
.swing-halo { fill: color-mix(in srgb, var(--accent) 32%, transparent); }
.swing.ok .swing-dot { fill: var(--ink-soft); }
.swing.ok .swing-halo { fill: color-mix(in srgb, var(--ink-soft) 16%, transparent); }
.swing-ends { display: flex; justify-content: space-between; margin-top: 10px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-faint); }
.swing-cap { margin-top: 8px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-faint); text-align: center; }
.readout-focus { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.readout-focus .fmech { font-family: var(--font-mono); font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-soft); }
.readout-focus .fcue { font-family: var(--font-display); font-size: clamp(1.15rem, 2vw, 1.5rem); line-height: 1.15; margin-top: 8px; text-wrap: balance; }
.readout-focus .fmeta { margin-top: 14px; display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-soft); }
.readout-focus .fmeta .chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid var(--line); border-radius: var(--radius-pill); background: var(--paper); }
.chip .cdot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.step { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; background: var(--paper-2); }
.step .num { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); }
.step h3 { margin-top: 16px; font-size: 1.2rem; }
.step p { margin: 10px 0 0; color: var(--ink-soft); font-size: 14.5px; }

/* ---------- mechanic vocabulary ---------- */
.mech-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(28px, 4vw, 64px); align-items: start; margin-top: 40px; }
.mech-list { display: flex; flex-direction: column; }
.mech-row { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--line); align-items: baseline; }
.mech-row:last-child { border-bottom: 1px solid var(--line); }
.mech-row .mi { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); }
.mech-row .mt { font-family: var(--font-display); font-size: 1.12rem; }
.mech-row .md { grid-column: 2; color: var(--ink-soft); font-size: 14px; margin-top: 4px; }
.aside-note { background: var(--ink); color: var(--paper); border-radius: var(--radius-lg); padding: 28px; position: sticky; top: 92px; }
.aside-note .h3 { color: var(--paper); }
.aside-note p { color: color-mix(in srgb, var(--paper) 76%, transparent); font-size: 14.5px; margin-top: 12px; }
.aside-note .cue-example { margin-top: 20px; padding: 16px; border: 1px solid rgba(255,255,255,.14); border-radius: var(--radius); }
.aside-note .cue-example .l { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.aside-note .cue-example .q { font-family: var(--font-display); font-size: 1.15rem; margin-top: 8px; }

/* ---------- research band ---------- */
.band { border-block: 1px solid var(--line); background: var(--paper-2); }
.band-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.src-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.src-list .src { font-family: var(--font-mono); font-size: 12px; color: var(--ink-soft); border: 1px solid var(--line); border-radius: var(--radius-pill); padding: 6px 12px; background: var(--paper); }

/* ---------- use cases ---------- */
.uses { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.use { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; background: var(--paper-2); }
.use .uk { font-family: var(--font-mono); font-size: 11px; letter-spacing: .07em; text-transform: uppercase; color: var(--ink-faint); }
.use h3 { margin-top: 12px; font-size: 1.18rem; }
.use ul { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 9px; }
.use li { position: relative; padding-left: 18px; color: var(--ink-soft); font-size: 14px; line-height: 1.45; }
.use li::before { content: ""; position: absolute; left: 0; top: 8px; width: 7px; height: 7px; border-radius: 2px; background: var(--accent); }

/* ---------- privacy / closing ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
.closing { text-align: center; }
.closing .h2 { max-width: 18ch; margin-inline: auto; }
.closing .hero-cta { justify-content: center; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 52px 0 24px; }
.footer-grid { display: grid; grid-template-columns: minmax(220px, 1.5fr) repeat(3, minmax(120px, .7fr)); gap: 32px; }
.footer-brand { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); font-family: var(--font-display); font-size: 16px; font-weight: 700; text-decoration: none; }
.footer-brand .mark { width: 22px; height: 22px; }
.footer-description { max-width: 34ch; margin: 13px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.55; }
.footer-heading { margin: 2px 0 12px; color: var(--ink); font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .07em; text-transform: uppercase; }
.footer-links { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.footer-links a { color: var(--ink-soft); font-size: 14px; text-decoration: none; text-underline-offset: 3px; }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--ink); text-decoration: underline; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 38px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--ink-faint); font-size: 12.5px; }

/* ---------- public plans and FAQ ---------- */
.page-hero { max-width: 700px; margin-inline: auto; text-align: center; }
.page-hero .lead { margin-inline: auto; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.plan-card { position: relative; display: flex; flex-direction: column; min-height: 360px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper-2); box-shadow: var(--shadow-1); }
.plan-card.featured { border-color: var(--ink); box-shadow: var(--shadow-2); }
.plan-badge { position: absolute; top: -12px; left: 18px; padding: 4px 9px; border-radius: var(--radius-pill); background: var(--accent); color: var(--accent-ink); font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: .04em; text-transform: uppercase; }
.plan-name { font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; }
.plan-price { display: flex; align-items: baseline; gap: 5px; margin-top: 16px; font-family: var(--font-display); }
.plan-price strong { font-size: 2.45rem; line-height: 1; letter-spacing: -.035em; }
.plan-price span { color: var(--ink-soft); font-size: 13px; }
.plan-summary { min-height: 50px; margin: 14px 0 18px; color: var(--ink-soft); font-size: 14px; }
.plan-features { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; color: var(--ink); font-size: 14px; }
.plan-features li { display: flex; gap: 8px; align-items: flex-start; }
.plan-features li::before { content: ""; width: 7px; height: 7px; flex: none; margin-top: .45em; border-radius: 50%; background: var(--accent); }
.plan-card .btn { width: 100%; margin-top: auto; }
.plan-card .btn { transition: background-color .18s var(--ease-out), border-color .18s var(--ease-out), color .18s var(--ease-out); }
.plan-card .btn[aria-busy="true"] { cursor: progress; }
@media (hover: hover) and (pointer: fine) {
  .plan-cta:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
}
.plan-cta:focus-visible { background: var(--ink); border-color: var(--ink); color: var(--paper); outline-color: var(--accent); }
.pricing-note { min-height: 1.55em; max-width: 660px; margin: 28px auto 0; color: var(--ink-soft); text-align: center; font-size: 14px; }
.billing-page { display: grid; min-height: calc(100dvh - 63px); place-items: center; padding-block: 48px; }
.billing-card { width: 100%; max-width: 680px; padding: clamp(28px, 5vw, 52px); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper-2); box-shadow: var(--shadow-2); text-align: center; }
.billing-card .h1 { margin-top: 12px; font-size: clamp(2.3rem, 5.5vw, 4rem); }
.billing-card .lead { margin: 18px auto 0; }
.billing-actions { display: flex; justify-content: center; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.faq-wrap { max-width: 900px; margin: 48px auto 0; }
.faq-group + .faq-group { margin-top: 42px; }
.faq-group-title { padding-bottom: 14px; border-bottom: 2px solid var(--ink); font-size: 1.25rem; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 68px; padding: 16px 0; color: var(--ink); cursor: pointer; font-family: var(--font-display); font-size: clamp(1rem, 2vw, 1.18rem); font-weight: 600; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon { flex: none; font-family: var(--font-body); font-size: 1.75rem; font-weight: 400; line-height: 1; }
.faq-item[open] .faq-icon { font-size: 0; }
.faq-item[open] .faq-icon::after { content: "−"; font-size: 1.75rem; }
.faq-item summary:hover { color: var(--ink-1); }
.faq-answer { max-width: 68ch; padding: 0 36px 20px 0; color: var(--ink-soft); }
.faq-answer p { margin: 0; }
.faq-contact { margin-top: 52px; padding: 28px; border: 1px solid var(--line-strong); border-radius: var(--radius-lg); background: var(--paper-2); text-align: center; }
.faq-contact .h3 { font-size: 1.4rem; }
.faq-contact p { margin: 8px auto 18px; color: var(--ink-soft); }

/* ---------- contact ---------- */
.contact-page { padding-block: clamp(28px, 4vw, 48px) clamp(40px, 5vw, 64px); }
.contact-shell { max-width: 660px; margin: 0 auto; padding: clamp(28px, 4vw, 36px); border: 1px solid var(--line); border-radius: 24px; background: var(--paper-2); box-shadow: var(--shadow-2); }
.contact-shell .page-hero { max-width: 560px; margin-inline: auto; text-align: center; }
.contact-shell .h1 { font-size: clamp(2.35rem, 5vw, 3.4rem); }
.contact-form { display: grid; gap: 16px; max-width: 520px; margin: 28px auto 0; }
.contact-form .field { margin-top: 0; gap: 8px; }
.contact-form .field label { color: var(--ink-soft); font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; }
.contact-control { width: 100%; min-height: 52px; padding: 10px 14px; border: 2px solid var(--line-strong); border-radius: 14px; background: var(--paper-2); color: var(--ink); font: inherit; font-size: 16px; transition: border-color .15s var(--ease-out), box-shadow .15s var(--ease-out); }
.contact-control::placeholder { color: var(--ink-faint); opacity: 1; }
.contact-control:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 4px rgba(20, 38, 28, .1); }
textarea.contact-control { min-height: 128px; resize: vertical; }
.contact-form .btn { min-height: 52px; margin-top: 4px; border-radius: 14px; font-size: 16px; }
.contact-hint, .contact-status { margin: 0; color: var(--ink-faint); font-size: 13px; text-align: center; }
.contact-status:not(:empty) { color: var(--ink-soft); }
.field-error { display: none; margin: 0; color: var(--danger); font-size: 13px; }
.field-error:not(:empty) { display: block; }
.contact-control[aria-invalid="true"] { border-color: var(--danger); }

/* ---------- forms & modal ---------- */
.overlay { position: fixed; inset: 0; z-index: var(--z-modal); display: grid; place-items: center; padding: 20px;
  background: rgba(20,38,28,.32); opacity: 0; pointer-events: none; transition: opacity .18s var(--ease-out); }
.overlay.open { opacity: 1; pointer-events: auto; }
.modal { width: 100%; max-width: 420px; background: var(--paper-2); border: 1px solid var(--line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-2); padding: 28px;
  position: relative; transform: translateY(8px) scale(.99); transition: transform .18s var(--ease-out); }
.overlay.open .modal { transform: none; }
.modal h2 { font-size: 1.5rem; }
.modal .sub { color: var(--ink-soft); font-size: 14px; margin-top: 6px; }
.field { display: flex; flex-direction: column; gap: 6px; margin-top: 16px; }
.field label { font-size: 13px; color: var(--ink-soft); font-weight: 500; }
.consent-field { line-height: 1.35; }
.consent-field[hidden] { display: none; }
.consent-field label { display: flex; align-items: flex-start; gap: 8px; font-weight: 400; }
.consent-field input { margin-top: 3px; accent-color: var(--ink); }
.input { height: 44px; padding-inline: 14px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--paper); color: var(--ink); font-size: 15px; transition: border-color .15s var(--ease-out); }
.input:focus { outline: none; border-color: var(--ink); }
.form-error { color: var(--danger); font-size: 13.5px; margin-top: 12px; min-height: 1em; }
.form-error:not(:empty) { padding: 8px 10px; border-left: 3px solid var(--danger); background: #FFF6F3; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.oauth-btn { display: flex; align-items: center; justify-content: center; gap: 10px; height: 44px; width: 100%;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); background: var(--paper-2); font-weight: 600; font-size: 14.5px; }
.oauth-btn:hover { border-color: var(--ink-soft); }
.oauth-btn[disabled] { opacity: .55; cursor: not-allowed; }
.divider { display: flex; align-items: center; gap: 12px; margin: 18px 0; color: var(--ink-faint); font-size: 12px; }
.divider::before, .divider::after { content: ""; height: 1px; background: var(--line); flex: 1; }
.modal-alt { margin-top: 18px; font-size: 13.5px; color: var(--ink-soft); text-align: center; }
.modal-close { position: absolute; top: 12px; right: 14px; width: 34px; height: 34px; border: 0; border-radius: 50%; background: transparent; color: var(--ink-soft); font-size: 26px; line-height: 1; }
.modal-close:hover { background: var(--paper); color: var(--ink); }

/* ---------- reveal motion ---------- */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .5s var(--ease-out), transform .5s var(--ease-out); }
[data-stagger] > * { opacity: 0; transform: translateY(12px); }
[data-stagger].in > * { opacity: 1; transform: none; transition: opacity .5s var(--ease-out), transform .5s var(--ease-out); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .hero-grid, .mech-grid, .band-grid, .split { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .uses { grid-template-columns: 1fr; }
  .aside-note { position: static; }
  .pricing-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: minmax(220px, 1.3fr) repeat(3, minmax(110px, .7fr)); gap: 24px; }
}

@media (max-width: 520px) {
  .nav-links .hide-sm { display: none; }
  .pricing-grid { grid-template-columns: 1fr; margin-top: 34px; }
  .plan-card { min-height: 0; }
  .faq-wrap { margin-top: 36px; }
  .faq-item summary { min-height: 60px; }
  .faq-answer { padding-right: 20px; }
  .contact-page { padding-block: 24px 40px; }
  .contact-shell { margin-inline: -8px; padding: 28px 22px; border-radius: var(--radius-lg); }
  .contact-form { margin-top: 26px; }
  .footer { padding-top: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .footer-intro { grid-column: 1 / -1; }
  .footer-bottom { margin-top: 30px; align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .reveal, [data-stagger] > * { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   App workspace
   ============================================================ */
.appbar { position: sticky; top: 0; z-index: var(--z-sticky); background: var(--paper);
  border-bottom: 1px solid var(--line); }
.appbar-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.usermenu { display: flex; align-items: center; gap: 14px; font-size: 14px; color: var(--ink-soft); }
.usermenu .who { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink); }

.workspace { display: grid; grid-template-columns: 248px 1fr 360px; gap: 0; min-height: calc(100dvh - 62px); }
.ws-side { border-right: 1px solid var(--line); padding: 20px 16px; overflow-y: auto; }
.ws-main { padding: 28px clamp(20px, 3vw, 40px); overflow-y: auto; }
.ws-chat { border-left: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }

.side-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.side-head .l { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-faint); }
.hist { display: flex; flex-direction: column; gap: 6px; }
.hist-item { text-align: left; width: 100%; background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 12px; display: flex; flex-direction: column; gap: 4px; transition: background-color .15s var(--ease-out), border-color .15s var(--ease-out); }
.hist-item:hover { background: var(--paper-2); border-color: var(--line); }
.hist-item.active { background: var(--paper-2); border-color: var(--line-strong); }
.hist-item .hm { font-family: var(--font-display); font-size: 14.5px; }
.hist-item .hd { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); display: flex; gap: 8px; align-items: center; }
.hist-badge { font-family: var(--font-mono); font-size: 10px; text-transform: uppercase; letter-spacing: .04em; padding: 2px 6px; border-radius: var(--radius-pill); border: 1px solid var(--line-strong); color: var(--ink-soft); }
.hist-badge.resolved { color: var(--ok); border-color: #BBD9C1; background: #F0F7F1; }
.hist-badge.improved { color: #7A6410; border-color: #E3D6A6; background: #FaF7EC; }
.hist-badge.recheck { color: var(--ink-soft); }

.empty { max-width: 520px; margin: 6vh auto 0; text-align: center; }
.empty .h2 { margin-bottom: 10px; }

/* dropzone */
.uploader { max-width: 620px; margin-inline: auto; }
.dropzone { border: 1.5px dashed var(--line-strong); border-radius: var(--radius-lg); background: var(--paper-2);
  padding: 40px 28px; text-align: center; transition: border-color .15s var(--ease-out), background-color .15s var(--ease-out); }
.dropzone.drag { border-color: var(--ink); background: #FCFCFB; }
.dropzone .dz-icon { width: 40px; height: 40px; margin: 0 auto 14px; color: var(--ink-soft); }
.dropzone .dz-file { font-family: var(--font-mono); font-size: 13px; color: var(--ink); margin-top: 8px; }
.opt-row { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 22px; flex-wrap: wrap; }
.seg { display: inline-flex; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); overflow: hidden; }
.seg button { padding: 8px 16px; background: var(--paper-2); border: none; font-size: 13.5px; color: var(--ink-soft); }
.seg button.on { background: var(--ink); color: var(--paper); }
.recheck-note { display: flex; align-items: center; gap: 10px; justify-content: center; margin-bottom: 16px;
  font-size: 13.5px; color: var(--ink-soft); background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius-pill); padding: 8px 16px; width: fit-content; margin-inline: auto; }

/* progress */
.analyzing { max-width: 480px; margin: 8vh auto 0; text-align: center; }
.prog-track { display: flex; flex-direction: column; gap: 2px; margin-top: 28px; text-align: left; }
.prog-step { display: flex; align-items: center; gap: 12px; padding: 10px 0; color: var(--ink-faint); font-size: 14px; }
.prog-step .pdot { width: 16px; height: 16px; border-radius: 50%; border: 2px solid var(--line-strong); flex: none; }
.prog-step.active { color: var(--ink); }
.prog-step.active .pdot { border-color: var(--accent); background: var(--accent); }
.prog-step.done { color: var(--ink-soft); }
.prog-step.done .pdot { border-color: var(--ink-soft); background: var(--ink-soft); }
.spinner { width: 34px; height: 34px; margin: 0 auto; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--ink); animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* result */
.result { max-width: 680px; margin-inline: auto; }
.verdict { border-radius: var(--radius-lg); padding: 18px 20px; margin-bottom: 22px; border: 1px solid var(--line); background: var(--paper-2); }
.verdict .vh { display: flex; align-items: center; gap: 10px; }
.verdict .vstatus { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; padding: 4px 10px; border-radius: var(--radius-pill); }
.verdict.resolved { border-color: #BBD9C1; background: #F0F7F1; }
.verdict.resolved .vstatus { background: var(--ok); color: #fff; }
.verdict.improved .vstatus { background: #C7A21C; color: #241d02; }
.verdict.unchanged .vstatus, .verdict.regressed .vstatus, .verdict.cannot_determine .vstatus { background: var(--ink-soft); color: #fff; }
.verdict p { margin: 10px 0 0; color: var(--ink-soft); font-size: 14.5px; }

.result-block { margin-top: 22px; }
.result-block .rb-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-faint); }
.result-block p { margin: 6px 0 0; font-size: 15.5px; }
.result-cue { background: var(--ink); color: var(--paper); border-radius: var(--radius); padding: 20px 22px; margin-top: 22px; }
.result-cue .rb-label { color: var(--accent); }
.result-cue .q { font-family: var(--font-display); font-size: 1.4rem; margin-top: 8px; line-height: 1.15; }
.secondary { margin-top: 30px; }
.secondary .srow { display: grid; grid-template-columns: 1fr auto; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); align-items: center; }
.secondary .srow .sm { font-family: var(--font-display); font-size: 15px; }
.secondary .srow .sc { color: var(--ink-soft); font-size: 13.5px; margin-top: 2px; }
.sstatus { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; padding: 3px 8px; border-radius: var(--radius-pill); border: 1px solid var(--line-strong); color: var(--ink-soft); white-space: nowrap; }
.sstatus.good { color: var(--ok); border-color: #BBD9C1; }
.sstatus.needs_attention { color: var(--danger); border-color: #E3C9BF; }
.result-actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }

/* chat */
.chat-head { padding: 16px 20px; border-bottom: 1px solid var(--line); }
.chat-head .ct { font-family: var(--font-display); font-size: 15px; }
.chat-head .cs { font-size: 12.5px; color: var(--ink-faint); margin-top: 2px; }
.chat-log { flex: 1 1 auto; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 14px; min-height: 0; }
.msg { max-width: 88%; padding: 11px 14px; border-radius: 14px; font-size: 14.5px; line-height: 1.5; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--ink); color: var(--paper); border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--paper-2); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.typing { color: var(--ink-faint); font-style: normal; }
.chat-empty { color: var(--ink-faint); font-size: 13.5px; text-align: center; margin: auto; padding: 20px; }
.chat-input { border-top: 1px solid var(--line); padding: 14px; display: flex; gap: 10px; align-items: flex-end; }
.chat-input textarea { flex: 1; resize: none; border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  padding: 10px 12px; font: inherit; font-size: 14.5px; background: var(--paper); color: var(--ink); max-height: 120px; min-height: 44px; }
.chat-input textarea:focus { outline: none; border-color: var(--ink); }
.chat-locked { padding: 20px; text-align: center; color: var(--ink-soft); font-size: 13.5px; border-top: 1px solid var(--line); }

@media (max-width: 1080px) {
  .workspace { grid-template-columns: 1fr; }
  .ws-side { border-right: none; border-bottom: 1px solid var(--line); }
  .ws-chat { border-left: none; border-top: 1px solid var(--line); min-height: 60vh; }
}

/* on-track (no fix needed) */
.pill-priority.ok { color: var(--ok); border-color: #BBD9C1; background: #F0F7F1; }
.readout.ok .phase.done .node { background: var(--ok); border-color: var(--ok); }
.readout.ok .readout-focus .fcue { color: var(--ink); }
.hist-badge.ontrack { color: var(--ok); border-color: #BBD9C1; background: #F0F7F1; }

/* research citations on the result */
.evidence { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); }
.evidence .rb-label { margin-bottom: 8px; }
.evidence .src-link { display: inline-block; margin: 0 8px 8px 0; font-family: var(--font-mono);
  font-size: 12px; color: var(--ink-soft); border: 1px solid var(--line); border-radius: var(--radius-pill);
  padding: 5px 11px; background: var(--paper); transition: border-color .15s var(--ease-out), color .15s var(--ease-out); }
.evidence a.src-link:hover { border-color: var(--ink-soft); color: var(--ink); }

/* chat topic starters (the coach is more than technique) */
.chat-starters { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.starter { font-family: var(--font-body); font-size: 13px; padding: 7px 13px; border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill); background: var(--paper-2); color: var(--ink); cursor: pointer;
  transition: border-color .15s var(--ease-out), background-color .15s var(--ease-out); }
.starter:hover { border-color: var(--ink-soft); }
.starter:active { transform: scale(.97); }

/* ============================================================
   Chat-first app (Cole)
   ============================================================ */
.chatapp { display: grid; grid-template-columns: 264px 1fr; height: 100dvh; }
.ca-side { border-right: 1px solid var(--line); padding: 18px 14px; display: flex; flex-direction: column; gap: 12px; min-height: 0; }
.ca-side .brand { font-size: 17px; }
.ca-mobile-menu { display: none; }
.ca-sessions { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; margin-top: 4px; }
.session-item { text-align: left; width: 100%; background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: 10px 11px; display: flex; flex-direction: column; gap: 3px; transition: background-color .15s var(--ease-out), border-color .15s var(--ease-out); }
.session-item:hover { background: var(--paper-2); border-color: var(--line); }
.session-item.active { background: var(--paper-2); border-color: var(--line-strong); }
.session-item .hm { font-family: var(--font-display); font-size: 14px; }
.session-item .hd { font-size: 11px; color: var(--ink-faint); display: flex; gap: 8px; align-items: center; }
.ca-user { display: flex; align-items: center; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line); padding-top: 12px; }
.ca-user .who { font-size: 12px; color: var(--ink-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.plan-usage { flex-basis: 100%; color: var(--ink-faint); font-size: 11px; line-height: 1.4; }

.ca-main { display: flex; flex-direction: column; min-height: 0; }
.ca-log { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 16px;
  padding: 30px max(20px, calc(50% - 380px)) 24px; }
.ca-log .msg { max-width: 86%; padding: 12px 15px; border-radius: 16px; font-size: 15px; line-height: 1.55; white-space: pre-wrap; }
.ca-log .msg.user { align-self: flex-end; background: var(--ink); color: var(--paper); border-bottom-right-radius: 5px; }
.ca-log .msg.assistant { align-self: flex-start; background: var(--paper-2); border: 1px solid var(--line); border-bottom-left-radius: 5px; }
.ca-log .msg.typing { color: var(--ink-faint); }
.ca-log .msg.card { max-width: 100%; align-self: stretch; background: transparent; border: none; padding: 0; }
.mini-spin { display: inline-block; width: 13px; height: 13px; border-radius: 50%; border: 2px solid var(--line); border-top-color: var(--ink); animation: spin .8s linear infinite; vertical-align: -2px; }

.starters { display: flex; flex-wrap: wrap; gap: 8px; align-self: flex-start; max-width: 86%; }

/* analysis card in a message */
.acard { border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--paper-2); padding: 22px; box-shadow: var(--shadow-1); }
.acard.ok .phase.done .node { background: var(--ok); border-color: var(--ok); }
.acard-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.acard .track { margin: 24px 4px 6px; }
.acard .card-actions { margin-top: 20px; }

/* composer */
.ca-composer { border-top: 1px solid var(--line); padding: 12px max(20px, calc(50% - 380px)) 14px; background: var(--paper); }
.attach-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.attach-row[hidden] { display: none; }
.attach-chip { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink); background: var(--paper-2); border: 1px solid var(--line-strong); border-radius: var(--radius-pill); padding: 6px 12px; }
.attach-row .seg button { padding: 6px 11px; font-size: 12.5px; }
.attach-clear { background: transparent; border: none; font-size: 20px; line-height: 1; color: var(--ink-faint); cursor: pointer; padding: 0 4px; }
.attach-clear:hover { color: var(--ink); }
.composer-bar { display: flex; align-items: flex-end; gap: 10px; border: 1px solid var(--line-strong); border-radius: 14px; background: var(--paper-2); padding: 8px 8px 8px 10px; }
.composer-bar:focus-within { border-color: var(--ink); }
.composer-bar textarea { flex: 1; resize: none; border: none; outline: none; background: transparent; font: inherit; font-size: 15px; color: var(--ink); min-height: 24px; max-height: 160px; padding: 6px 0; line-height: 1.4; }
.icon-btn { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 9px; border: none; background: transparent; color: var(--ink-soft); cursor: pointer; flex: none; }
.icon-btn:hover { background: var(--paper); color: var(--ink); }
.composer-hint { text-align: center; font-size: 12px; margin: 10px 0 0; }

@media (max-width: 820px) {
  .chatapp { display: flex; flex-direction: column; height: 100dvh; }
  .ca-side { flex: none; display: flex; flex-flow: row wrap; align-items: center; gap: 10px; padding: 10px 14px; border-right: none; border-bottom: 1px solid var(--line); }
  .ca-side .brand { margin-right: auto; padding: 4px 0 !important; }
  .ca-side #new-chat { width: auto; }
  .ca-mobile-menu { display: inline-grid; place-items: center; width: 38px; height: 38px; padding: 0; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); color: var(--ink); background: var(--paper-2); }
  .ca-mobile-menu:hover { border-color: var(--ink-soft); }
  .ca-sessions, .ca-user { display: none; flex-basis: 100%; }
  .ca-side.menu-open .ca-sessions { display: flex; flex: none; max-height: min(42dvh, 320px); padding-top: 4px; }
  .ca-side.menu-open .ca-user { display: flex; flex-wrap: wrap; justify-content: flex-start; padding: 12px 0 2px; }
  .ca-user .who, .plan-usage { flex-basis: 100%; }
  .ca-main { flex: 1; min-height: 0; }
}