/* WebQR API demo — layout and theme */
:root {
  --bg-page: #eef1f7;
  --bg-panel: #ffffff;
  --bg-hero: #1a2744;
  --text: #1a1d26;
  --text-muted: #5a6780;
  --border: #d8deeb;
  --accent: #3d6ee6;
  --accent-dark: #2f56b8;
  --ok: #1b6e3b;
  --err: #b00020;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(20, 28, 48, 0.08);
  font-size: 15px;
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Ubuntu, sans-serif;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg-page);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 0.75rem;
  background: #fff;
  border-radius: 8px;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 1.15rem;
}

/* Hero */
.hero {
  background: linear-gradient(165deg, #1e2f52 0%, #141c2e 100%);
  color: #f4f6fb;
  padding: 2rem 0 1.75rem;
  margin-bottom: 0;
}

.hero-inner {
  max-width: 1040px;
}

.hero-badge {
  display: inline-block;
  margin: 0 0 0.65rem;
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #c7d7ff;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-lead {
  margin: 0;
  max-width: 58rem;
  font-size: 0.98rem;
  line-height: 1.55;
  opacity: 0.94;
}

.hero-lead code {
  font-size: 0.88em;
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.12);
}

/* Steps */
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0.75rem 0 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
}

.steps li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.steps-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
}

/* Layout */
.main-grid {
  padding: 0 0 2.75rem;
}

.split {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  align-items: start;
}

@media (min-width: 960px) {
  .split {
    grid-template-columns: minmax(0, 1fr) 340px;
  }

  .panel-sticky {
    position: sticky;
    top: 1rem;
  }
}

.panel {
  background: var(--bg-panel);
  border-radius: var(--radius);
  padding: 1.15rem 1.25rem 1.35rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.panel-accent {
  border-color: #c5d4f5;
  background: linear-gradient(180deg, #f8faff 0%, #fff 48%);
}

.panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
}

.panel-intro {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.panel-intro code {
  font-size: 0.88em;
  padding: 0.08rem 0.28rem;
  border-radius: 4px;
  background: #eef1f8;
}

.mini-hint {
  margin-top: 0.65rem !important;
}

.grid2 {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 700px) {
  .grid2 {
    grid-template-columns: 1fr;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field span {
  font-size: 0.82rem;
  font-weight: 600;
  color: #3d4d66;
}

.field span code {
  font-weight: 700;
  font-size: 0.92em;
}

.input-row {
  display: flex;
  gap: 0.45rem;
  align-items: stretch;
}

.input-grow {
  flex: 1;
  min-width: 0;
}

.btn-shrink {
  flex-shrink: 0;
  white-space: nowrap;
}

input[type='url'],
input[type='password'],
input[type='text'],
textarea {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border: 1px solid #c9d0df;
  border-radius: 8px;
  font: inherit;
  background: #fbfcfe;
}

textarea {
  resize: vertical;
  min-height: 10rem;
  font-family: ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 13px;
  line-height: 1.45;
}

.hint {
  margin: 0.35rem 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hint code {
  font-size: 0.88em;
  background: #eef1f8;
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

.checks {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.check {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: #334155;
  cursor: pointer;
}

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

.inline-check {
  margin: 0 0 0.65rem;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin: 0.85rem 0 1rem;
  padding: 0.65rem 0.75rem;
  background: #f4f6fb;
  border-radius: 8px;
  border: 1px dashed #c5ccd9;
}

.preset-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: #3d4d66;
}

.preset-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.docs-block {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.85rem;
  background: #fafbfd;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.88rem;
}

.docs-block summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--accent-dark);
}

.docs-list {
  margin: 0.5rem 0 0;
  padding-left: 1.15rem;
  color: var(--text-muted);
}

.docs-list li {
  margin-bottom: 0.35rem;
}

.docs-list code {
  font-size: 0.86em;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.65rem;
  margin-top: 0.95rem;
}

.btn {
  cursor: pointer;
  border: 1px solid #b8c2d6;
  background: #f4f6fb;
  color: #243047;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--accent);
  border-color: #355fcd;
  color: #fff;
}

.btn.primary:hover:not(:disabled) {
  background: var(--accent-dark);
}

.btn.ghost {
  background: transparent;
}

.btn.danger.ghost {
  border-color: #e2a4a4;
  color: #a02626;
}

.btn.sm {
  padding: 0.28rem 0.55rem;
  font-size: 0.82rem;
}

.status {
  margin: 0.65rem 0 0;
  min-height: 1.25em;
  font-size: 0.88rem;
}

.status.ok {
  color: var(--ok);
}

.status.err {
  color: var(--err);
}

.preview {
  margin-top: 0.35rem;
  min-height: 180px;
  padding: 1rem;
  background: #fafbfd;
  border: 1px dashed #c5ccd9;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview svg {
  max-width: 100%;
  height: auto;
}

.preview .placeholder {
  margin: 0;
  color: #6a758c;
  font-size: 0.9rem;
  text-align: center;
}

/* Tabs */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.65rem;
}

.tab {
  cursor: pointer;
  border: 1px solid var(--border);
  background: #f4f6fb;
  color: #334155;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
}

.tab:hover {
  border-color: #aeb9d0;
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.tab-panel.hidden {
  display: none;
}

.code-block {
  margin: 0 0 0.5rem;
  padding: 0.85rem 1rem;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 8px;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: min(420px, 55vh);
  overflow: auto;
  border: 1px solid #1e293b;
}

.copy-btn {
  margin-bottom: 0.35rem;
}

.row-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.35rem;
}

.saved-list {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.saved-empty {
  margin: 0;
  padding: 0.5rem 0;
  color: #6a758c;
  font-size: 0.9rem;
}

.saved-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #fbfcfe;
}

.saved-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  padding: 0.55rem 0.75rem;
  background: #eef1f8;
  border-bottom: 1px solid var(--border);
}

.saved-head strong {
  flex: 1 1 8rem;
  word-break: break-all;
  font-size: 0.88rem;
}

.saved-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.saved-design {
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
  border-bottom: 1px solid var(--border);
  background: #fafbfd;
}

.saved-design summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-dark);
}

.saved-json {
  margin: 0.5rem 0 0.35rem;
  padding: 0.5rem 0.65rem;
  background: #0f172a;
  color: #cbd5e1;
  border-radius: 6px;
  font-size: 11px;
  max-height: 160px;
  overflow: auto;
}

.saved-body {
  padding: 0.75rem;
  display: flex;
  justify-content: center;
  background: #fff;
}

.saved-body svg {
  max-width: 100%;
  height: auto;
}

.foot {
  padding: 1.25rem 0 2.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: #e8ecf4;
}

.foot-inner p {
  margin: 0;
}

.foot code {
  font-size: 0.92em;
  background: #dce2f0;
  padding: 0.12rem 0.35rem;
  border-radius: 4px;
}