/* recallit · "The Reading Room" — marketing/index.html + marketing/demo
 * paper, a serif question, a mono receipt, mint appears exactly once: on the grade.
 * See DESIGN.md. Values in tokens.css.
 */

*,
*::before,
*::after {
  box-sizing: border-box;
}
html,
body {
  overflow-x: clip;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--text-base) / var(--lh-relaxed) var(--serif);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4,
p,
dl,
dd,
ul,
ol {
  margin: 0;
  padding: 0;
}
h1,
h2,
h3 {
  font-weight: 400;
  font-family: var(--serif);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  overflow-wrap: anywhere;
  min-width: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
img,
svg {
  display: block;
  max-width: 100%;
}
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
::selection {
  background: var(--mint-pale);
  color: var(--ink);
}

.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;
}
.sr-only:focus {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  width: auto;
  height: auto;
  padding: var(--space-xs) var(--space-md);
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-sm);
  z-index: 999;
  clip: auto;
  white-space: normal;
}

.mono {
  font: 500 0.6875rem / 1.15 var(--mono);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

.wrap {
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

/* ── Nav ─────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--page-gutter);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.nav .brand {
  font: 500 1.0625rem var(--serif);
  letter-spacing: var(--tracking-tight);
}
.nav .links {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}
.nav .links a {
  color: var(--muted);
  transition: color var(--dur-short) var(--ease-out);
}
@media (hover: hover) {
  .nav .links a:hover {
    color: var(--ink);
  }
}

/* ── Buttons · ink pills (never mint — that's the grade's job) ───── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  min-height: 44px;
  padding-inline: var(--space-lg);
  border-radius: var(--radius-pill);
  border: 1px solid var(--ink);
  color: var(--ink);
  font: 500 0.6875rem / 1 var(--mono);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out),
    border-color var(--dur-short) var(--ease-out);
}
.btn.ghost {
  background: transparent;
}
@media (hover: hover) {
  .btn.ghost:hover {
    background: var(--paper-2);
  }
}
.btn.sm {
  min-height: 36px;
  padding-inline: var(--space-md);
  font-size: 0.625rem;
}
.fine {
  margin-top: var(--space-md);
  color: var(--muted);
  font-family: var(--sans);
  font-size: var(--text-xs);
}

/* ── Hero ────────────────────────────────────────────────────────── */
.hero {
  padding-block: 3.5rem 2.5rem;
}
.hero h1 {
  font-size: clamp(1.9rem, 3vw + 1rem, 2.5rem);
  letter-spacing: var(--tracking-display);
  max-width: 20ch;
  text-wrap: balance;
}
.hero .lede {
  margin-top: 0.6rem;
  color: var(--ink-2);
  font-size: 1.0625rem;
  max-width: 44ch;
}
.hero .sub {
  margin-top: 0.75rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.9375rem;
  max-width: 50ch;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.tag {
  font: 500 0.75rem var(--mono);
  letter-spacing: 0.01em;
  color: var(--ink-2);
  border: 1px solid var(--rule-2);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.75rem;
}
a.tag {
  transition:
    border-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out);
}
@media (hover: hover) {
  a.tag:hover {
    border-color: var(--ink);
    color: var(--ink);
  }
}

/* ── Terminal card · the only visual proof, real commands only ───── */
.term-card {
  margin-top: 2rem;
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.9rem;
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}
.term-bar .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--rule-2);
}
.term-bar .label {
  margin-left: 0.4rem;
  font: 400 0.75rem var(--mono);
  color: var(--muted);
}
.term-body {
  background: var(--code-bg);
  color: var(--code-fg);
  padding: 1.1rem 1.2rem;
  font: 400 0.8125rem / 1.7 var(--mono);
}
.term-body div + div {
  margin-top: 0.6rem;
}
/* Terminal syntax colors are constants, like --code-bg/--code-fg: the terminal
   never re-themes with the page, so these can't be page-theme tokens. */
.term-body .p {
  color: #8a887e;
}
.term-body .out,
.term-body .cmt {
  color: #8a887e;
}
.term-body .rating {
  color: var(--mint);
}
.term-body .flag {
  color: #e2c17a;
}
.term-body .s {
  color: #9fd6c4;
}
.term-body .cmd {
  color: var(--code-fg);
}

/* ── Section grammar · mono kicker + serif heading, rules only ────── */
.sec {
  padding-block: 2.75rem;
  border-top: 1px solid var(--rule);
}
.wrap > .sec:first-child {
  border-top: 0;
}
.sec-kicker {
  display: block;
  margin-bottom: 0.9rem;
}
.sec > h2 {
  font-size: 1.5rem;
  letter-spacing: var(--tracking-display);
  text-wrap: balance;
}
.sec-lede {
  margin-top: 0.35rem;
  color: var(--muted);
  max-width: 56ch;
}

/* legacy .sec-head grammar (still used by marketing/demo) */
.sec-head {
  display: grid;
  grid-template-columns: var(--kicker-col) 1fr;
  gap: var(--space-xl);
  align-items: start;
  margin-bottom: var(--space-xl);
}
.sec-head .mono {
  color: var(--muted);
  padding-top: 0.5rem;
}
.sec-head h2 {
  font-size: var(--text-3xl);
  letter-spacing: var(--tracking-display);
  text-wrap: balance;
}
.sec-head p {
  margin-top: var(--space-xs);
  color: var(--ink-2);
  max-width: 56ch;
}

/* ── Primitives grid ───────────────────────────────────────────────*/
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  margin-top: 1.25rem;
}
.cell {
  padding: 1.25rem 1.4rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.cell:nth-child(2n) {
  border-right: 0;
}
.cell:nth-last-child(-n + 2) {
  border-bottom: 0;
}
.cell h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.9375rem;
}
.cell .fn {
  display: block;
  margin-top: 0.3rem;
  font: 400 0.8125rem var(--mono);
  color: var(--mint-deep);
}
.cell p {
  margin-top: 0.5rem;
  color: var(--ink-2);
  font-family: var(--sans);
  font-size: 0.875rem;
  line-height: 1.5;
}
.cell p a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.receipt-strip {
  margin-top: 1.25rem;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.8125rem;
}
.grade-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font: 500 0.6875rem / 1 var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--mint-pale);
  border: 1px solid var(--mint);
  color: var(--ink);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.6rem;
}

/* ── Docs stack ─────────────────────────────────────────────────── */
.doc-block {
  margin-top: 1.5rem;
}
.doc-block:first-of-type {
  margin-top: 1.25rem;
}
.doc-block h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
}
.doc-block .term-card {
  margin-top: 0;
}

/* ── Footer ─────────────────────────────────────────────────────── */
.foot {
  border-top: 1px solid var(--rule);
  padding: 1.25rem clamp(1.25rem, 4vw, 2rem);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.8125rem;
}
.foot .mono {
  color: var(--muted);
}
.foot a {
  transition: color var(--dur-short) var(--ease-out);
}
@media (hover: hover) {
  .foot a:hover {
    color: var(--ink);
  }
}

/* ── Reveal (one-shot) ───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(14px);
}
.reveal.in {
  opacity: 1;
  transform: none;
  transition:
    opacity var(--dur-long) var(--ease-out),
    transform var(--dur-long) var(--ease-out);
}

/* ── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 60rem) {
  .sec-head {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}
@media (max-width: 40rem) {
  .hero h1 {
    max-width: 100%;
  }
  .nav .links {
    display: none;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .cell {
    border-right: 0 !important;
  }
  .foot {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal,
  .reveal.in {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    transition: none !important;
  }
}