/* Jam Session — the arrangement view.
   Light-first, warm paper + near-black ink, five instrument colors. */

:root {
  color-scheme: light dark;

  --paper: #FBFAF7;
  --ink: #191710;
  --ink-soft: color-mix(in srgb, var(--ink) 62%, transparent);
  --ink-faint: color-mix(in srgb, var(--ink) 45%, transparent);
  --line: color-mix(in srgb, var(--ink) 14%, transparent);
  --line-strong: color-mix(in srgb, var(--ink) 30%, transparent);

  --accent: #E5533D;

  --t-amber: #E8A33D;
  --t-teal: #2E9E8F;
  --t-violet: #7C6BD9;
  --t-coral: #E5533D;
  --t-leaf: #6FA83F;

  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15140F;
    --ink: #EDEAE0;
    --ink-soft: color-mix(in srgb, var(--ink) 65%, transparent);
    --ink-faint: color-mix(in srgb, var(--ink) 48%, transparent);
    --line: color-mix(in srgb, var(--ink) 18%, transparent);
    --line-strong: color-mix(in srgb, var(--ink) 34%, transparent);

    --accent: #FF7A5C;

    --t-amber: #F0B255;
    --t-teal: #43B5A5;
    --t-violet: #9384E6;
    --t-coral: #FF7A5C;
    --t-leaf: #85BD55;
  }
}

/* ---------- base ---------- */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.65 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

::selection { background: color-mix(in srgb, var(--accent) 28%, transparent); }

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

h2 {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
}

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

code { font-family: var(--mono); }

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

/* shared container */
.top, main > section, .divider, footer {
  max-width: 880px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

main > section { margin-block: clamp(3.5rem, 9vh, 6.5rem); }
main > section > p { max-width: 62ch; color: var(--ink-soft); }

/* ---------- mini-track glyph (logo mark) ---------- */

.mark {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 26px;
  flex-shrink: 0;
}
.mark i { height: 3.5px; border-radius: 2px; }
.mark i:nth-child(1) { background: var(--t-coral); width: 100%; }
.mark i:nth-child(2) { background: var(--t-amber); width: 66%; }
.mark i:nth-child(3) { background: var(--t-teal); width: 84%; }

/* ---------- top bar ---------- */

.top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 1.5rem;
  padding-block: 1.4rem;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 650;
  font-size: 1.05rem;
  color: var(--ink);
}
.wordmark .home {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
}
.wordmark .by { font-weight: 500; color: var(--ink-soft); }
.wordmark .by a {
  color: inherit;
  text-decoration-color: var(--line-strong);
}
.wordmark .by a:hover { color: var(--accent); text-decoration-color: currentColor; }

.top nav { display: flex; gap: 1.5rem; }
.top nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 550;
  padding-block: 0.5rem; /* comfortable tap target */
}
.top nav a:hover { color: var(--accent); }

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

.hero { margin-top: clamp(2.5rem, 12vh, 7.5rem); }

.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0 0 1.25rem;
}
.hero h1 em {
  font-style: normal;
  text-decoration: underline wavy var(--t-violet);
  text-decoration-thickness: 0.055em;
  text-underline-offset: 0.14em;
}

.hero .lede {
  font-size: clamp(1.05rem, 2.4vw, 1.2rem);
  color: var(--ink-soft);
  max-width: 58ch;
  margin-bottom: 1.25rem;
}

.trust {
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
}

.copy {
  font: 600 0.9rem/1 system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--accent);
  background: transparent;
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  padding: 0.6rem 1.1rem;
  min-height: 44px;
  cursor: pointer;
  transition: transform 150ms ease, background-color 150ms ease, color 150ms ease;
}
.copy:hover { background: var(--accent); color: var(--paper); }
.copy.copied { background: var(--accent); color: var(--paper); transform: scale(1.05); }

/* ---------- getting started ---------- */

.prompt-card {
  border: 1.5px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.4rem;
  margin-block: 1.5rem;
  max-width: 44rem;
  box-shadow: 4px 4px 0 var(--line);
}
.prompt-card p { margin-bottom: 1.1rem; overflow-wrap: anywhere; }
.prompt-card code {
  font-size: 0.88em;
  background: color-mix(in srgb, var(--ink) 7%, transparent);
  border-radius: 4px;
  padding: 0.1em 0.35em;
}
.prompt-card .copy { border-radius: 8px; }

.agent-message {
  margin-left: auto;
  color: #F5F5F5;
  background: #1F1F1F;
  border-color: #333333;
  border-radius: 20px 20px 6px 20px;
  box-shadow: 4px 4px 0 color-mix(in srgb, #000 22%, transparent);
}
.agent-message a { color: #70AFFF; }
.agent-message .copy {
  color: #70AFFF;
  border-color: #70AFFF;
}
.agent-message .copy:hover,
.agent-message .copy.copied {
  color: #101010;
  background: #70AFFF;
}

.start .aside { font-size: 0.9rem; color: var(--ink-faint); }
.start .or { margin: 1.75rem 0 0.75rem; }

.manual-install {
  max-width: 44rem;
  margin-top: 1.75rem;
}
.manual-install summary {
  width: fit-content;
  color: var(--ink-faint);
  cursor: pointer;
}
.manual-install[open] summary { margin-bottom: 0.75rem; }

/* the do-it-yourself line lives in a dark terminal in both color schemes */
.install {
  --term: #1E1C17;
  --term-ink: #EDEAE0;
  --term-accent: #FF7A5C;
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--term-ink);
  background: var(--term);
  border: 1.5px solid color-mix(in srgb, var(--term-ink) 16%, transparent);
  border-radius: var(--radius);
  padding: 0.7rem 0.7rem 0.7rem 1.25rem;
  max-width: 44rem;
  box-shadow: 4px 4px 0 var(--line);
}
.install code {
  flex: 1;
  font-size: 0.92rem;
  white-space: nowrap;
  overflow-x: auto;
  padding-block: 0.35rem;
  scrollbar-width: none;
}
.install code::before {
  content: "$ ";
  color: color-mix(in srgb, var(--term-ink) 45%, transparent);
  user-select: none;
}
.install .copy { color: var(--term-accent); border-color: var(--term-accent); }
.install .copy:hover, .install .copy.copied { background: var(--term-accent); color: var(--term); }
.install .copy:focus-visible { outline-color: var(--term-accent); }

/* ---------- Jam Session example ---------- */

.jam figure { margin: 0; }
.jam-shot {
  display: block;
  width: 100%;
  height: auto;
}
.jam figcaption {
  margin-top: 1.1rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.jam figcaption code { font-size: 0.92em; }

.liner-note {
  max-width: 44rem;
  margin: clamp(-2rem, -3vh, -1rem) auto clamp(3.5rem, 9vh, 6.5rem);
  padding: 1.5rem 1.75rem;
  border-left: 4px solid var(--t-violet);
  background: color-mix(in srgb, var(--t-violet) 6%, transparent);
}
.liner-note p { color: var(--ink-soft); }
.liner-note-byline {
  margin-top: 1.25rem;
  font-weight: 650;
}

/* ---------- section divider ---------- */

.divider {
  display: flex;
  align-items: center;
  gap: 16px;
}
.divider::before, .divider::after {
  content: "";
  flex: 1;
  height: 1.5px;
  background: var(--line);
}
.divider .mark { width: 22px; }
.divider .mark i { height: 3px; }

/* ---------- how it works ---------- */

.how-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-top: 1.5rem;
}
.how-grid p { color: var(--ink-soft); }

/* ---------- skills ---------- */

.skill-list {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  border-bottom: 1px solid var(--line);
}
.skills > p { max-width: none; }
.skill-list li {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  grid-template-areas:
    "dot name slug"
    ".   desc slug";
  column-gap: 14px;
  align-items: baseline;
  padding-block: 0.95rem;
  border-top: 1px solid var(--line);
}
.skill-list .dot {
  grid-area: dot;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--tc);
  align-self: center;
  justify-self: center;
}
.skill-name { grid-area: name; font-weight: 650; }
.skill-desc { grid-area: desc; color: var(--ink-soft); font-size: 0.95rem; }
.skill-list code {
  grid-area: slug;
  align-self: center;
  font-size: 0.72rem;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.25rem 0.55rem;
  white-space: nowrap;
}
.skill-support {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: var(--ink-faint);
}

/* ---------- footer ---------- */

footer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-block: 2.5rem 3.5rem;
  margin-top: clamp(3rem, 8vh, 5rem);
  border-top: 1.5px solid var(--line);
  font-size: 0.9rem;
  color: var(--ink-faint);
}
footer p { margin: 0; }
.footer-by {
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--ink);
}
.footer-by a { color: inherit; text-decoration-color: var(--accent); }
.footer-by a:hover { color: var(--accent); }
.footer-x {
  margin-left: 0.2rem;
  padding: 0.25rem 0.3rem; /* comfortable tap target */
  text-decoration: none;
}
.footer-meta { margin-left: auto; }

/* ---------- mobile ---------- */

@media (max-width: 640px) {
  main > section { margin-block: 3.25rem; }

  .install {
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    gap: 0.75rem;
  }
  .install code {
    white-space: normal;
    overflow-wrap: anywhere;
    overflow-x: visible;
    line-height: 1.5;
  }


  .how-grid { grid-template-columns: 1fr; gap: 1.75rem; }

  .skill-list li {
    grid-template-columns: 14px 1fr;
    grid-template-areas:
      "dot name"
      ".   desc"
      ".   slug";
    row-gap: 0.2rem;
  }
  .skill-list code { justify-self: start; margin-top: 0.25rem; }

  footer { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .footer-meta { margin-left: 0; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .copy { transition: none; }
  .copy.copied { transform: none; }
}