:root {
  --paper: #efe9df;
  --ink: #1c1a17;
  --muted: #6b6459;
  --line: rgba(28, 26, 23, 0.14);
  --frame: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 1.5rem 4rem;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

.site-head {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 0 1.5rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.lede {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.controls {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.controls label {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

select {
  font: inherit;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  min-width: 14rem;
}

.link-btn {
  margin-left: auto;
  border: none;
  background: none;
  color: var(--ink);
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.generate {
  max-width: 720px;
  margin: 0 auto 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

#key-box {
  display: none !important;
}

#key-box.is-open {
  display: flex !important;
}

.text-btn[hidden] {
  display: none !important;
}

.generate label {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.generate input[type="text"],
.generate input[type="password"] {
  flex: 1;
  min-width: 12rem;
  font: inherit;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.generate button,
.key-row button {
  font: inherit;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
}

.generate button:disabled {
  opacity: 0.5;
  cursor: wait;
}

.generate .text-btn {
  border: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  padding: 0.45rem 0;
}

.status {
  max-width: 720px;
  margin: 0 auto 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.status.error {
  color: #8a2f2f;
}

.key-box {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 0.9rem;
}

.key-box summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.key-box p {
  margin: 0.7rem 0;
}

.key-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.key-row input {
  flex: 1;
  min-width: 12rem;
  font: inherit;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.tabs {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--line);
}

.tab {
  font: inherit;
  font-size: 0.9rem;
  padding: 0.6rem 1.1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  color: var(--muted);
  cursor: pointer;
}

.tab.active {
  color: var(--ink);
  border-bottom-color: var(--ink);
  font-weight: 600;
}

.tab:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ---- Learn tab: the "before → becomes" lesson format ---- */
.lesson {
  max-width: 640px;
  margin: 0 auto;
}

.step-text {
  margin: 1.6rem 0;
}

.step-text p {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink);
}

.step-text .step-label {
  margin: 0 0 0.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.panel {
  margin: 1rem 0;
  border-radius: 8px;
  overflow: hidden;
}

.panel svg {
  display: block;
  width: 100%;
}

.becomes {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  margin: 1.1rem 0;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.becomes::before,
.becomes::after {
  content: "";
  height: 1px;
  width: 44px;
  background: var(--line);
}

.takeaway {
  margin: 2rem 0 1rem;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.lesson-empty {
  color: var(--muted);
  font-style: italic;
  text-align: center;
  margin: 3rem 0;
}

.variations {
  max-width: 720px;
  margin: 0 auto 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.variation-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  cursor: pointer;
}

.variation-btn.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.layout {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

.poster-wrap {
  margin: 0;
}

/* The poster itself: a 3:4 colored field, like Carreras. */
.poster {
  position: relative;
  width: min(420px, 100%);
  margin: 0 auto;
  aspect-ratio: 3 / 4;
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(40, 30, 12, 0.18);
}

.art,
.art svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* Title + description sit on top of the art, top-left, like the originals. */
.poster-text {
  position: absolute;
  top: 7%;
  left: 8%;
  right: 8%;
  z-index: 1;
  pointer-events: none;
}

.poster-text h2 {
  margin: 0 0 0.4rem;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.poster-text p {
  margin: 0;
  max-width: 88%;
  font-size: 0.6rem;
  line-height: 1.45;
  opacity: 0.72;
}

.caption {
  margin: 1rem auto 0;
  width: min(420px, 100%);
  display: grid;
  gap: 0.5rem;
}

.note-line {
  margin: 0;
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0.6rem;
  align-items: baseline;
  color: var(--muted);
  font-size: 0.92rem;
  font-style: italic;
}

.note-label {
  font-style: normal;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
}

.philosophy {
  margin: 1.1rem auto 0;
  width: min(420px, 100%);
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--ink);
  background: #fff;
  border-radius: 4px;
}

.philosophy-label {
  margin: 0 0 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
}

.philosophy p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.spec-wrap {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  padding: 1rem 1.1rem;
}

.spec-label,
.spec-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.spec-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.spec-note {
  margin-top: 0.6rem;
}

pre {
  margin: 0;
  overflow-x: auto;
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.5;
  color: #24303a;
}

@media (min-width: 860px) {
  .layout {
    grid-template-columns: 1fr 1fr;
  }
}