/* PocketProf landing page — reuses web/src/styles/tokens.css verbatim (assets/tokens.css). */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 "Inter", var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  margin: 0;
  font-family: "Newsreader", var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.015em;
}

p, ul {
  margin: 0;
}

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

::selection {
  background: var(--brand-soft);
}

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 600 19px/1 "Newsreader", var(--font-serif);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
}

.nav-links a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav-links a.nav-signup {
  margin-left: 4px;
  background: var(--brand);
  color: var(--on-brand);
}

.nav-links a.nav-signup:hover {
  background: var(--brand-hover);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text-2);
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.theme-toggle .icon-sun,
.dark .theme-toggle .icon-moon {
  display: none;
}

.dark .theme-toggle .icon-sun {
  display: block;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 18px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  transition: background 0.15s;
}

.btn-primary {
  background: var(--brand);
  color: var(--on-brand);
}

.btn-primary:hover {
  background: var(--brand-hover);
}

.btn-plain {
  border: 1px solid var(--border-strong);
}

.btn-plain:hover {
  background: var(--surface-hover);
}

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

.hero {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 56px;
  align-items: center;
  padding: 56px 0 88px;
}

.hero h1 {
  font-size: clamp(38px, 4.6vw, 58px);
  line-height: 1.06;
}

.hero-sub {
  margin-top: 20px;
  max-width: 470px;
  font-size: 18px;
  color: var(--text-2);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hint {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-3);
}

/* ---------- example stacks ----------
   Each [data-part] holds all three examples in one grid cell, so it is as
   tall as its tallest example at any width and switching never shifts the
   page. Only the active layer is visible. */

.stack {
  display: grid;
}

.stack > * {
  grid-area: 1 / 1;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s var(--ease-out), visibility 0s linear 0.15s;
}

.stack > .is-active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.2s var(--ease-out) 0.1s, visibility 0s;
}

@media (prefers-reduced-motion: reduce) {
  .stack > *,
  .stack > .is-active {
    transition: none;
  }
}

/* ---------- subject picker (one per section, kept in sync) ---------- */

.stage-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  align-content: flex-start;
  gap: 8px 14px;
  margin-bottom: 14px;
}

.stage-topic {
  font-size: 13px;
  color: var(--text-3);
}

.picker {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-2);
}

.picker button {
  font: inherit;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-2);
  background: none;
  border: 0;
  border-radius: 999px;
  padding: 7px 14px;
  cursor: pointer;
}

.picker button:hover {
  color: var(--text);
}

.picker button[aria-selected="true"] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm), 0 0 0 1px var(--border);
}

.picker button:focus-visible,
.opt:focus-visible,
.btn:focus-visible,
.nav-links a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ---------- quiz card (mirrors the app's probe card) ---------- */

.quiz {
  display: flex;
  flex-direction: column;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--text-3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-pop);
}

.kicker {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.quiz > .stack {
  flex: 1 0 auto;
}

.quiz-layer {
  display: flex;
  flex-direction: column;
}

.quiz-q {
  margin: 10px 0 16px;
  font: 500 20px/1.35 "Newsreader", var(--font-serif);
}

.opt {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin-bottom: 8px;
  padding: 11px 12px;
  font: inherit;
  font-size: 14.5px;
  line-height: 1.45;
  text-align: left;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.opt:hover {
  border-color: var(--border-strong);
}

.opt-key {
  flex: none;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-size: 12px;
  color: var(--text-2);
}

.opt.is-right {
  border-color: var(--success);
  background: var(--success-soft);
}

.opt.is-wrong {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.opt.is-unsure {
  border-color: var(--warning);
  background: var(--warning-soft);
}

.verdicts {
  flex: 1 0 auto;
  margin-top: 12px;
}

.verdict {
  border: 1px solid transparent;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
}

.verdict.is-empty {
  border: 1px dashed var(--border-strong);
  color: var(--text-3);
}

.verdict-label {
  display: block;
  margin-bottom: 2px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.verdict.misconception { background: var(--danger-soft); }
.verdict.misconception .verdict-label { color: var(--danger); }
.verdict.solid { background: var(--success-soft); }
.verdict.solid .verdict-label { color: var(--success); }
.verdict.shaky { background: var(--warning-soft); }
.verdict.shaky .verdict-label { color: var(--warning); }

/* ---------- walkthrough rows ---------- */

.row {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 64px;
  align-items: start;
  padding: 72px 0;
  border-top: 1px solid var(--border);
}

.step {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-3);
}

.row h2 {
  margin-top: 8px;
  font-size: 32px;
  line-height: 1.12;
}

.row-copy p:not(.step) {
  margin-top: 14px;
  color: var(--text-2);
}

.panel {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.ideas {
  list-style: none;
  padding: 0;
}

.ideas li {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}

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

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c);
}

.status-pill {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  color: var(--c);
  background: var(--s);
}

.s-solid { --c: var(--status-solid); --s: var(--success-soft); }
.s-shaky { --c: var(--status-shaky); --s: var(--warning-soft); }
.s-misconception { --c: var(--status-misconception); --s: var(--danger-soft); }
.s-unseen { --c: var(--status-unseen); --s: var(--surface-2); }

.lesson-p {
  font: 400 18px/1.6 "Newsreader", var(--font-serif);
}

.teach-layer {
  display: flex;
  flex-direction: column;
}

.teach-layer .ask {
  margin-top: auto;
}

.teach-layer .lesson-p:last-of-type {
  margin-bottom: 16px;
}

.lesson-p + .lesson-p {
  margin-top: 12px;
}

.ask {
  padding: 14px;
  border: 1px solid var(--socratic);
  border-radius: var(--radius-md);
  background: var(--socratic-soft);
  font-size: 14.5px;
}

.ask-label {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--socratic);
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--text-2);
}

.stats b {
  font-weight: 600;
  color: var(--text);
}

.how-you-learn {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.how-you-learn span {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 600;
}

.how-you-learn p {
  font: italic 400 16px/1.5 "Newsreader", var(--font-serif);
  color: var(--text-2);
}

/* ---------- pricing ---------- */

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  align-items: stretch;
}

.plan {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.plan-main {
  border-color: var(--brand);
}

.plan h3 {
  font-size: 20px;
}

.plan-price {
  margin-top: 10px;
  font: 500 32px/1.1 "Newsreader", var(--font-serif);
}

.plan-price span {
  margin-left: 2px;
  font: 400 14px/1 "Inter", var(--font-sans);
  color: var(--text-3);
}

.plan-list {
  flex: 1;
  margin: 18px 0 24px;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
  color: var(--text-2);
}

.plan-list li {
  padding: 7px 0;
  border-top: 1px solid var(--border);
}

.plan .btn {
  align-self: flex-start;
}

/* ---------- closing ---------- */

.end {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  padding: 88px 0 112px;
  border-top: 1px solid var(--border);
}

.end h2 {
  max-width: 620px;
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.1;
}

.footer {
  display: flex;
  justify-content: space-between;
  padding: 20px 0 40px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-3);
}

.footer a:hover {
  color: var(--text-2);
}

.footer-links {
  display: flex;
  gap: 20px;
}

/* ---------- legal pages (privacy, terms) ---------- */

.legal {
  max-width: 720px;
  padding: 48px 0 80px;
}

.legal h1 {
  font-size: 40px;
  line-height: 1.15;
}

.legal h2 {
  margin-top: 36px;
  font-size: 22px;
}

.legal p,
.legal ul {
  margin-top: 12px;
  color: var(--text-2);
}

.legal ul {
  padding-left: 22px;
}

.legal li + li {
  margin-top: 8px;
}

.legal a {
  color: var(--brand);
  text-decoration: underline;
}

.legal .updated {
  color: var(--text-3);
  font-size: 14px;
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero,
  .row {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero {
    padding: 24px 0 64px;
  }

  .row {
    padding: 48px 0;
  }

}

@media (max-width: 700px) {
  .plans {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .wrap {
    padding: 0 16px;
  }

  .hide-sm {
    display: none;
  }

  .picker {
    display: flex;
    width: 100%;
  }

  .picker button {
    flex: 1;
    padding: 7px 8px;
  }

  .quiz,
  .panel {
    padding: 18px;
  }

  .ideas li {
    font-size: 14px;
  }
}