/* IRA landing page. The palette is the web chat's (src/ira/web/static/style.css). */

:root {
  --bg: #f6f4ef;
  --panel: #ffffff;
  --text: #1d2321;
  --muted: #5d6763;
  --line: #dcd8cf;
  --accent: #1f6f5c;
  --accent-text: #ffffff;
  --user: #e3efe9;
  --ok: #166534;
  --code-bg: #efece5;
  --shadow: 0 1px 2px rgb(29 35 33 / 0.05), 0 18px 40px -24px rgb(29 35 33 / 0.28);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121615;
    --panel: #1a201e;
    --text: #e7ece9;
    --muted: #9aa7a2;
    --line: #2c3532;
    --accent: #4fb397;
    --accent-text: #0c1311;
    --user: #20342d;
    --ok: #6fd39a;
    --code-bg: #0d1110;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 18px 40px -24px rgb(0 0 0 / 0.7);
  }
}

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { line-height: 1.2; margin: 0; }
p { margin: 0; }

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--code-bg);
  border-radius: 5px;
  padding: 0.1em 0.35em;
  overflow-wrap: anywhere;
}

.wrap { width: min(60rem, 100% - 2rem); margin-inline: auto; }

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--panel);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  z-index: 1;
}
.skip:focus { top: 1rem; }

/* Header */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.mark { width: 1.75rem; height: 1.75rem; flex: none; }
.mark.small { width: 1.35rem; height: 1.35rem; }

.top nav { display: flex; gap: 1.25rem; }
.top nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.top nav a:hover { color: var(--text); }

/* Buttons */

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.btn {
  display: inline-block;
  padding: 0.65rem 1.1rem;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--accent);
}
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--muted); filter: none; }

/* Hero */

.hero {
  display: grid;
  gap: 3rem;
  padding-block: 2.5rem 4rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.75rem 0.2rem 0.25rem;
  margin-bottom: 1.5rem;
}
.pill span {
  font-family: var(--mono);
  font-size: 0.75rem;
  background: var(--user);
  color: var(--text);
  border-radius: 999px;
  padding: 0.05rem 0.5rem;
}

h1 {
  font-size: clamp(2.75rem, 2rem + 4vw, 4rem);
  letter-spacing: -0.035em;
  line-height: 1;
  margin-bottom: 1.25rem;
}

.lead { font-size: 1.1875rem; line-height: 1.5; max-width: 30rem; }
.sub { color: var(--muted); max-width: 30rem; margin-top: 1rem; }
.hero .actions { margin-top: 2rem; }

/* Demo window: the web chat's own look. */

.demo { margin: 0; }

.window {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--line);
  font-weight: 700;
}
.window-title { margin-right: auto; }

.tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.1rem 0.45rem;
}

.messages {
  list-style: none;
  margin: 0;
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  background: var(--bg);
}

.msg {
  max-width: 88%;
  padding: 0.5rem 0.75rem;
  border-radius: 14px;
  font-size: 0.875rem;
  line-height: 1.45;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.msg.user { align-self: flex-end; background: var(--user); }
.msg.ira { align-self: flex-start; background: var(--panel); border: 1px solid var(--line); }

.card {
  background: var(--panel);
  border: 1px solid var(--accent);
  border-radius: 14px;
  padding: 0.75rem 0.9rem;
}
.card-title {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.card-summary { font-weight: 600; font-size: 0.9375rem; margin: 0.2rem 0 0.6rem; }
.card-row { display: flex; gap: 0.45rem; flex-wrap: wrap; }
.pin,
.fake-btn {
  font-size: 0.8125rem;
  border-radius: 9px;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line);
}
.pin { width: 6.5rem; color: var(--muted); background: var(--bg); }
.fake-btn { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
.fake-btn.ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.card-status { font-size: 0.8125rem; color: var(--muted); margin-top: 0.5rem; }

.demo figcaption {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 0.85rem;
  line-height: 1.5;
}
.demo figcaption strong { color: var(--text); }

/* Sections */

.band {
  border-top: 1px solid var(--line);
  padding-block: 3.5rem;
}

.intro { max-width: 38rem; margin-bottom: 2.25rem; }
.intro h2 { font-size: 1.625rem; letter-spacing: -0.02em; margin-bottom: 0.75rem; }
.intro p { color: var(--muted); font-size: 1.0625rem; }

h3 { font-size: 1.0625rem; margin-bottom: 0.35rem; }

/* Problem and answer pairs */

.pairs { margin: 0; display: grid; }
.pair {
  display: grid;
  gap: 0.4rem;
  padding-block: 1.25rem;
  border-top: 1px solid var(--line);
}
.pair dt { color: var(--muted); font-size: 0.9375rem; }
.pair dd { margin: 0; }
.pair dd p { max-width: 36rem; }

/* PIN flow */

.flow { margin: 0 0 2rem; }

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.step {
  position: relative;
  display: grid;
  gap: 0.35rem;
  align-content: start;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem 1rem 1rem;
}

/* The arrow to the next step: down on a phone, across on a wide screen. */
.step:not(:last-child)::after {
  content: "↓";
  content: "↓" / "";
  position: absolute;
  left: 50%;
  bottom: -1.6rem;
  transform: translateX(-50%);
  color: var(--muted);
  line-height: 1.4;
}

.step-k {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}
.step-v {
  font-family: var(--mono);
  font-size: 0.8125rem;
  background: none;
  padding: 0;
  color: var(--text);
  overflow-wrap: anywhere;
}
.step-n { font-size: 0.875rem; color: var(--muted); line-height: 1.5; }

/* Before the PIN things are only proposed (dashed); after it they are real (solid). */
.step.proposed { border-style: dashed; border-color: var(--muted); }
.step.gate { border: 2px solid var(--accent); }
.step.gate .step-k { color: var(--accent); }
.step.gate .step-v { letter-spacing: 0.2em; }
.step.done { border-color: var(--ok); }
.step.done .step-k { color: var(--ok); }
.lock { width: 0.95rem; height: 0.95rem; fill: currentColor; }

.facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem 2rem;
}
.facts li { color: var(--muted); font-size: 0.9375rem; max-width: 34rem; }
.facts strong { color: var(--text); font-weight: 600; }
.more { margin-top: 1.5rem; font-weight: 600; }

/* Channels */

.channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.channels li {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.1rem 1.15rem 1.15rem;
}
.channels p { color: var(--muted); font-size: 0.9375rem; flex: 1; }
.channels li > code { align-self: flex-start; margin-top: 0.5rem; font-size: 0.8125rem; }

/* Install */

.code {
  max-width: 42rem;
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0.6rem 0.45rem 1.15rem;
  border-bottom: 1px solid var(--line);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  min-height: 2.4rem;
}
.code pre {
  margin: 0;
  padding: 1rem 1.15rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.65;
}
.code pre code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; }
.code .c { color: var(--muted); }

.copy {
  font: inherit;
  text-transform: none;
  letter-spacing: normal;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
}
.copy:hover { color: var(--text); }

.after { margin-top: 1.25rem; max-width: 42rem; color: var(--muted); }
.after code { white-space: nowrap; }

/* Status and footer */

.status {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
}
.status h2 { font-size: 1.375rem; margin-bottom: 0.6rem; }
.status p { color: var(--muted); max-width: 38rem; margin-bottom: 1.25rem; }

.foot {
  border-top: 1px solid var(--line);
  padding-block: 1.75rem 2.5rem;
  font-size: 0.875rem;
  color: var(--muted);
  display: grid;
  gap: 0.35rem;
}

/* Wider screens */

@media (min-width: 40rem) {
  .band { padding-block: 4.5rem; }
  .facts { grid-template-columns: 1fr 1fr; }
  .status { padding: 2rem; }
}

@media (min-width: 56rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 25rem);
    align-items: center;
    gap: 4rem;
    padding-block: 4.5rem 6rem;
  }

  .pair {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    gap: 2.5rem;
  }
  .pair dt { padding-top: 0.1rem; }

  .steps { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.75rem; }
  .step:not(:last-child)::after {
    content: "→";
    content: "→" / "";
    left: auto;
    right: -1.35rem;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%);
  }

  .channels { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}