:root {
  --paper: #f5efe1;
  --panel: rgba(255, 250, 241, 0.88);
  --ink: #18212f;
  --ink-soft: #4a5566;
  --edge: rgba(24, 33, 47, 0.12);
  --accent: #d86c3f;
  --accent-soft: rgba(216, 108, 63, 0.14);
  --shadow: 0 24px 70px rgba(41, 33, 20, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(216, 108, 63, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(84, 148, 167, 0.24), transparent 24%),
    linear-gradient(180deg, #f9f5eb 0%, #efe3c6 100%);
}

.page-shell {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 360px);
  gap: 24px;
  align-items: start;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
}

h1,
h2 {
  font-family: "Fraunces", serif;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(1.9rem, 3.8vw, 3rem);
  line-height: 1;
  max-width: none;
}

.lede {
  max-width: 58ch;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.intro-points {
  margin: 18px 0 14px;
  padding-left: 22px;
  max-width: 62ch;
  color: var(--ink-soft);
  display: grid;
  gap: 8px;
  line-height: 1.5;
}

.hero-card,
.panel {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-card {
  padding: 20px 22px;
}

.hero-card p {
  margin: 0 0 12px;
  font-weight: 700;
}

.hero-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  display: grid;
  gap: 8px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  gap: 24px;
}

.panel {
  padding: 22px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.6rem;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  text-align: right;
  font-size: 0.95rem;
}

form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
}

.expression-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.builder-button {
  padding: 12px 16px;
  box-shadow: none;
}

.helper-text,
.status-text {
  margin: -4px 0 0;
  font-size: 0.88rem;
  line-height: 1.5;
}

.helper-text {
  color: var(--ink-soft);
}

.status-text {
  min-height: 1.5em;
  color: var(--accent);
  font-weight: 700;
}

input,
select,
button {
  font: inherit;
}

input[type="text"],
select {
  width: 100%;
  border: 1px solid rgba(24, 33, 47, 0.14);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

input[type="color"] {
  width: 100%;
  min-height: 46px;
  border: 1px solid rgba(24, 33, 47, 0.14);
  border-radius: 14px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.78);
}

.grid {
  display: grid;
  gap: 14px;
}

.two-up,
.colors {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(135deg, #cf6137 0%, #8d7d4f 100%);
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
  box-shadow: 0 12px 30px rgba(141, 125, 79, 0.24);
}

button:hover {
  transform: translateY(-1px);
}

button.secondary,
.ghost-button {
  color: var(--ink);
  background: #fff;
  box-shadow: none;
  border: 1px solid rgba(24, 33, 47, 0.14);
}

.preview-panel {
  display: grid;
  align-content: start;
}

.preview {
  min-height: 760px;
  border-radius: 22px;
  padding: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.8), rgba(250, 247, 239, 0.76)),
    repeating-linear-gradient(
      45deg,
      rgba(141, 125, 79, 0.035) 0,
      rgba(141, 125, 79, 0.035) 12px,
      transparent 12px,
      transparent 24px
    );
  border: 1px dashed rgba(24, 33, 47, 0.15);
}

.preview svg {
  width: 100%;
  height: auto;
  display: block;
}

.builder-modal[hidden] {
  display: none;
}

.builder-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
}

.builder-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(24, 33, 47, 0.45);
  backdrop-filter: blur(5px);
}

.builder-dialog {
  position: relative;
  width: min(760px, calc(100% - 24px));
  margin: 5vh auto;
  background: rgba(255, 250, 241, 0.97);
  border: 1px solid var(--edge);
  border-radius: 26px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.builder-head,
.builder-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.builder-head h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: 1.5rem;
}

.builder-close {
  padding: 10px 14px;
}

.builder-preview-wrap {
  margin: 18px 0 0;
}

.builder-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.builder-group {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(24, 33, 47, 0.1);
}

.builder-group p {
  margin: 0 0 12px;
  font-weight: 700;
  color: var(--ink-soft);
}

.builder-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.builder-operator-layout {
  display: grid;
  gap: 10px;
}

.builder-operator-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.builder-brackets {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 4px;
}

.builder-key {
  min-width: 58px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(24, 33, 47, 0.14);
  background: #fff;
  color: var(--ink);
  box-shadow: none;
}

.builder-key code {
  font-size: 0.92rem;
}

.builder-key.word {
  min-width: 88px;
}

.builder-actions {
  margin-top: 18px;
  justify-content: flex-end;
  flex-wrap: wrap;
}

@media (max-width: 940px) {
  .hero,
  .layout {
    grid-template-columns: 1fr;
  }

  .preview {
    min-height: 520px;
  }

  .builder-grid {
    grid-template-columns: 1fr;
  }
}