/* Shared presentation system, matching RenderPDF / ExtractKit UI primitives */
:root {
  color-scheme: light;
  --bg: #f3f5f7;
  --bg-elevated: #ffffff;
  --panel: #ffffff;
  --panel-strong: #f8fafb;
  --text: #17202a;
  --muted: #586473;
  --line: #d7dde4;
  --line-strong: #aeb8c4;
  --accent: #111827;
  --success: #176b3a;
  --error: #9f2e2e;
  --warning: #9a6700;
  --shadow: none;
  --control-radius: 999px;
  --button-radius: var(--control-radius);
  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --container-width: min(1180px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  overflow-y: scroll;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background-color: var(--bg);
  background-image: radial-gradient(#cbd2da 0.7px, transparent 0.7px);
  background-size: 18px 18px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
}

a {
  color: inherit;
  font-weight: 500;
}

button, input, textarea, select {
  font: inherit;
}

code, pre, textarea, .key-display {
  font-family: var(--font-mono);
}

button, a {
  -webkit-tap-highlight-color: transparent;
}

.shell {
  width: var(--container-width);
  margin: 0 auto;
  padding: 24px 0 34px;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
  width: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
}

.brand-mark {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #6aa9ff;
  box-shadow: 0 0 0 4px rgb(106 169 255 / 16%);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  color: var(--muted);
  font-size: .82rem;
  font-weight: 600;
}

.topnav a {
  color: inherit;
  border: 0;
  padding: 0;
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  transition: color 160ms ease;
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--text);
  outline: none;
}

/* Hero Intro */
.hero-intro {
  display: grid;
  align-content: start;
  gap: 10px;
  margin: 40px 0 32px;
}

.eyebrow {
  margin: 0;
  color: #64748b;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.hero-intro h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -.045em;
  text-wrap: balance;
  color: var(--text);
}

.lead {
  margin: 0;
  max-width: 65ch;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.6;
}

/* Workspace / Playground Card */
.workspace-panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 28px;
}

.panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .panels {
    grid-template-columns: 1fr 1fr;
  }
}

.panel-group {
  display: flex;
  flex-direction: column;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.field-label {
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.counter-badge {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--muted);
}

textarea {
  width: 100%;
  height: 340px;
  min-height: 240px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: .82rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

textarea:focus {
  border-color: #8795a5;
  outline: 2px solid rgb(106 169 255 / 18%);
}

textarea[readonly] {
  background-color: var(--panel-strong);
}

.panel-actions {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.panel-actions-end {
  justify-content: flex-end;
}

/* Buttons (RenderPDF Pill Design) */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--button-radius);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease, color 160ms ease;
  white-space: nowrap;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  outline: none;
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #1f2937;
  border-color: #1f2937;
  color: #fff;
}

.button-secondary {
  background: #fff;
}

.button.copied {
  background: #edf8f1;
  border-color: #b9dfc8;
  color: var(--success);
}

/* Controls Panel */
.controls-panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 32px;
}

.controls-header {
  margin-bottom: 24px;
}

.panel-kicker {
  margin: 0 0 6px;
  color: #64748b;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.controls-lead {
  margin: 0;
  color: var(--muted);
  font-size: .84rem;
}

.category-block {
  margin-bottom: 24px;
}

.category-block:last-child {
  margin-bottom: 0;
}

.category-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #64748b;
  display: flex;
  align-items: center;
  gap: 8px;
}

.category-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.transform-control-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 600px) {
  .transform-control-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .transform-control-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.transform-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-strong);
  transition: border-color 160ms ease, background-color 160ms ease;
}

.transform-item:has(input[type="checkbox"]:checked) {
  border-color: #93c5fd;
  background: #f0f7ff;
}

.transform-item:hover {
  border-color: var(--line-strong);
}

.transform-control {
  padding-top: 2px;
}

.transform-content {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 100%;
}

.transform-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.title {
  font-size: .84rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
}

.description {
  font-size: .74rem;
  color: var(--muted);
  line-height: 1.4;
}

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
  margin: 0;
}

.inline-setting {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

input[type="number"] {
  border: 1px solid var(--line);
  border-radius: var(--control-radius);
  background: #fff;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .72rem;
  text-align: center;
  width: 3.2rem;
  height: 24px;
  padding: 0 4px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

input[type="number"]:focus {
  border-color: #8795a5;
  outline: 2px solid rgb(106 169 255 / 18%);
}

/* Footer */
.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 20px 0 10px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
  font-family: var(--font-mono);
}

.footer p {
  margin: 0;
}

.footer a {
  color: inherit;
  text-decoration: none;
  transition: color 160ms ease;
}

.footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

.footer nav {
  display: flex;
  gap: 16px;
}