:root {
  --bg: #ecf3f1;
  --panel: rgba(255, 255, 255, 0.96);
  --panel-strong: #ffffff;
  --text: #10201d;
  --muted: #58706a;
  --line: #d7e3df;
  --accent: #0f766e;
  --accent-dark: #134e4a;
  --accent-soft: #e6fffa;
  --danger: #b91c1c;
  --shadow: 0 20px 45px rgba(16, 32, 29, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(20, 184, 166, 0.18), transparent 24%),
    radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.12), transparent 24%),
    linear-gradient(180deg, #f6fbfa 0%, var(--bg) 100%);
}

.app-shell {
  height: 100vh;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr) 320px 280px;
  gap: 16px;
  padding: 16px;
  overflow: hidden;
}

.panel {
  min-width: 0;
  min-height: 0;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow-y: auto;
  overflow-x: hidden;
  backdrop-filter: blur(18px);
}

.panel-inner {
  padding: 18px;
}

.panel-head {
  margin-bottom: 16px;
}

.panel-head h1,
.panel-head h2,
.section-card-head h2,
.result-head h2 {
  margin: 0;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-weight: 700;
}

.lede {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.section-card {
  margin-top: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, var(--panel-strong), #f8fcfb);
}

.section-card-head {
  margin-bottom: 12px;
}

.section-card-head h2 {
  font-size: 15px;
}

.compact-card {
  padding: 12px;
}

.action-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  text-decoration: none;
  border: 1px solid #99f6e4;
  background: linear-gradient(135deg, #ecfdf5, #dffaf4);
  color: var(--accent-dark);
  transition: transform 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
}

.action-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.12);
  border-color: #5eead4;
}

.action-link-title {
  font-weight: 700;
}

.action-link-subtitle {
  font-size: 12px;
  color: var(--muted);
}

.json-import {
  cursor: pointer;
}

.json-import input[type="file"] {
  margin-top: 8px;
}

.settings-grid,
.template-card-grid,
.data-fields {
  display: grid;
  gap: 12px;
}

.settings-grid,
.data-fields {
  grid-template-columns: 1fr;
}

.data-field.multiline textarea {
  min-height: 96px;
}

label,
.data-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label span,
.data-field span {
  font-size: 13px;
  color: var(--muted);
}

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

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  background: #fff;
  color: var(--text);
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(15, 118, 110, 0.18);
  border-color: var(--accent);
}

textarea {
  resize: vertical;
  min-height: 110px;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 12px 14px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  font-weight: 700;
}

.secondary-btn,
.icon-btn {
  background: var(--accent-soft);
  color: var(--accent-dark);
  border: 1px solid #99f6e4;
}

.danger-btn {
  color: white;
  background: var(--danger);
  border-color: var(--danger);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  text-decoration: none;
}

.panel-actions,
.header-actions,
.move-actions,
.template-card-actions {
  display: flex;
  gap: 8px;
}

.panel-actions {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.preview-surface {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: white;
  overflow: hidden;
}

#preview-frame {
  width: 100%;
  min-height: 720px;
  border: 0;
  display: block;
  background: white;
}

.json-card {
  margin-top: 16px;
}

.blocks-nav-card,
.editor-card {
  margin-top: 0;
}

.blocks-nav {
  display: grid;
  gap: 8px;
}

.block-nav-item {
  width: 100%;
  text-align: left;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #f8fffd;
  color: var(--text);
}

.block-nav-item.active {
  border-color: #99f6e4;
  background: #e6fffa;
}

.block-nav-title,
.block-nav-subtitle {
  display: block;
}

.block-nav-title {
  font-weight: 700;
}

.block-nav-subtitle {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.template-fields {
  min-height: 0;
}

.template-card {
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fbfffe;
  overflow: hidden;
}

.empty-editor {
  padding: 18px;
  border: 1px dashed var(--line);
  border-radius: 18px;
  color: var(--muted);
  background: #f8fffd;
}

.template-card-head,
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.template-details > summary {
  list-style: none;
}

.template-details > summary::-webkit-details-marker {
  display: none;
}

.template-card-head {
  margin: 0;
  padding: 16px;
  cursor: pointer;
  background: #f8fffd;
}

.template-details[open] .template-card-head {
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}

.template-card-summary {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.template-card-actions,
.template-card-grid,
.image-thumb {
  margin-left: 16px;
  margin-right: 16px;
}

.template-card-actions {
  margin-bottom: 14px;
}

.template-details[open] {
  padding-bottom: 16px;
}

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

code {
  padding: 2px 6px;
  border-radius: 999px;
  background: #e2e8f0;
  color: #0f172a;
}

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

.full-width {
  grid-column: 1 / -1;
}

.image-thumb {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: white;
}

.image-thumb img {
  display: block;
  max-width: 100%;
  max-height: 180px;
  margin: 0 auto;
}

.payload-layout {
  width: min(1100px, calc(100% - 32px));
  margin: 24px auto;
}

.payload-panel pre {
  min-height: 70vh;
  margin: 0;
}

pre {
  margin: 8px 0 18px;
  padding: 14px;
  min-height: 260px;
  overflow: auto;
  background: #0f172a;
  color: #e5eefc;
  border-radius: 16px;
  font-size: 13px;
}

@media (max-width: 1280px) {
  .app-shell {
    grid-template-columns: 320px minmax(0, 1fr) 280px;
  }

  .panel-editor {
    display: none;
  }
}

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 320px minmax(0, 1fr);
  }

  .panel-right,
  .panel-editor {
    display: none;
  }
}

@media (max-width: 900px) {
  body {
    overflow: auto;
  }

  .app-shell {
    height: auto;
    min-height: 100vh;
    grid-template-columns: 1fr;
  }

  .panel {
    overflow: visible;
  }

  .template-card-grid,
  .data-fields {
    grid-template-columns: 1fr;
  }
}