:root {
  --bg: #eef6f4;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-strong: #ffffff;
  --ink: #13313a;
  --muted: #5c6f77;
  --line: rgba(19, 49, 58, 0.12);
  --accent: #0d786d;
  --accent-strong: #14598a;
  --accent-soft: #d8f0ea;
  --warm: #cb7745;
  --warning: #925300;
  --warning-soft: #fff3de;
  --danger: #9d3138;
  --danger-soft: #ffe7e6;
  --shadow: 0 24px 60px rgba(19, 49, 58, 0.12);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1220px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background:
    radial-gradient(circle at 0 0, rgba(13, 120, 109, 0.12), transparent 20rem),
    radial-gradient(circle at 100% 15%, rgba(20, 89, 138, 0.1), transparent 18rem),
    linear-gradient(180deg, #f9fcfb 0%, var(--bg) 48%, #e9f0ee 100%);
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.demo-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(249, 252, 251, 0.84);
  border-bottom: 1px solid rgba(19, 49, 58, 0.08);
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 5.2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  display: block;
  width: auto;
  height: 3rem;
}

.demo-hero h1,
.panel-heading h2,
.output-head h3 {
  font-family: Georgia, "Times New Roman", serif;
}

.lead,
.hero-list,
.notice-bar,
.sidebar-card,
.panel-heading p,
.field span,
.checkbox span,
.summary-list,
.check-list,
.output-notice,
.review-note {
  color: var(--muted);
}

.header-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem;
}

.link-chip,
.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.6rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.58);
}

.status-chip {
  color: var(--accent);
  background: rgba(216, 240, 234, 0.6);
}

.demo-hero {
  padding: 4rem 0 2rem;
}

.hero-grid,
.app-grid {
  display: grid;
  gap: 1.2rem;
}

.eyebrow,
.card-label {
  margin: 0 0 0.8rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.demo-hero h1 {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2.7rem, 6vw, 4.9rem);
  line-height: 1.04;
}

.lead {
  max-width: 62ch;
  margin: 1.3rem 0 0;
  font-size: 1.06rem;
}

.hero-card,
.sidebar-card,
.panel,
.notice-bar,
.stepper,
.feedback {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.45rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.76)),
    linear-gradient(140deg, rgba(216, 240, 234, 0.28), rgba(20, 89, 138, 0.09));
}

.hero-list {
  margin: 0;
  padding-left: 1.15rem;
}

.hero-list li + li {
  margin-top: 0.65rem;
}

.demo-section {
  padding: 0 0 4rem;
}

.workspace {
  display: grid;
  gap: 1rem;
}

.notice-bar {
  padding: 1rem 1.1rem;
  color: var(--warning);
  background: var(--warning-soft);
  box-shadow: none;
}

.stepper {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  padding: 0.8rem;
}

.step-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  min-height: 3.5rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.step-item.is-active {
  color: var(--ink);
  background: rgba(216, 240, 234, 0.64);
  border-color: rgba(13, 120, 109, 0.16);
}

.step-index {
  display: inline-grid;
  place-items: center;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 50%;
  color: var(--accent);
  font-weight: 800;
  background: #fff;
}

.sidebar {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.sidebar-card,
.panel {
  padding: 1.3rem;
}

.status-list {
  display: grid;
  gap: 0.9rem;
  margin: 0;
}

.status-list div {
  display: grid;
  gap: 0.25rem;
}

.status-list dt {
  font-size: 0.84rem;
  color: var(--muted);
}

.status-list dd {
  margin: 0;
  font-weight: 700;
  color: var(--ink);
}

.tip-list {
  margin: 0;
  padding-left: 1.15rem;
}

.tip-list li + li {
  margin-top: 0.65rem;
}

.action-stack {
  display: grid;
  gap: 0.75rem;
}

.panel-stack {
  display: grid;
  gap: 1rem;
}

.feedback {
  min-height: 3.2rem;
  padding: 0.9rem 1.1rem;
  display: none;
  align-items: center;
}

.feedback.is-visible {
  display: flex;
}

.feedback.is-success {
  color: var(--accent);
  background: rgba(216, 240, 234, 0.64);
}

.feedback.is-warning {
  color: var(--warning);
  background: var(--warning-soft);
}

.feedback.is-error {
  color: var(--danger);
  background: var(--danger-soft);
}

.panel-heading {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
}

.panel-heading h2 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.08;
}

.panel-heading p {
  margin: 0;
  max-width: 62ch;
}

.case-form {
  display: grid;
  gap: 1rem;
}

.field-grid {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field input,
.field textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(19, 49, 58, 0.14);
  border-radius: var(--radius-md);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.86);
  resize: vertical;
}

.field input:focus,
.field textarea:focus,
.checkbox input:focus {
  outline: 2px solid rgba(13, 120, 109, 0.22);
  outline-offset: 1px;
}

.field input.is-invalid,
.field textarea.is-invalid,
.checkbox.is-invalid {
  border-color: rgba(157, 49, 56, 0.44);
}

.field-error {
  min-height: 1.1rem;
  font-size: 0.88rem;
  color: var(--danger);
}

.checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.95rem 1rem;
  border: 1px solid rgba(19, 49, 58, 0.1);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.52);
}

.checkbox input {
  margin-top: 0.2rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.88rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 16px 28px rgba(20, 89, 138, 0.2);
}

.button-secondary {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.64);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  transform: none;
}

.review-grid,
.output-stack {
  display: grid;
  gap: 1rem;
}

.review-card,
.output-card {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
}

.summary-list {
  display: grid;
  gap: 0.85rem;
  margin: 0;
}

.summary-list div {
  display: grid;
  gap: 0.25rem;
}

.summary-list dt {
  color: var(--ink);
  font-weight: 700;
}

.summary-list dd {
  margin: 0;
  white-space: pre-wrap;
}

.check-list {
  margin: 0;
  padding-left: 1.15rem;
}

.check-list li + li {
  margin-top: 0.6rem;
}

.output-notice {
  padding: 1rem 1.1rem;
  border: 1px dashed rgba(19, 49, 58, 0.18);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.48);
}

.output-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}

.output-head h3 {
  margin: 0;
  font-size: 1.45rem;
}

.output-body {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.55;
}

.output-card-accent {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.72)),
    linear-gradient(135deg, rgba(216, 240, 234, 0.3), rgba(20, 89, 138, 0.08));
}

.review-note {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
}

.is-hidden {
  display: none;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(21rem, 0.85fr);
    align-items: center;
  }

  .app-grid {
    grid-template-columns: minmax(17rem, 0.34fr) minmax(0, 0.66fr);
    align-items: start;
  }

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

  .field-full,
  .checkbox,
  .form-actions,
  .panel-actions {
    grid-column: 1 / -1;
  }

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

@media (max-width: 759px) {
  .demo-header {
    position: static;
  }

  .brand-logo {
    height: 2.55rem;
  }

  .header-bar,
  .header-actions {
    justify-content: flex-start;
  }

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

  .output-head {
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}