/* Official Light Theme Design System for Universal Document™ Creator */

:root {
  --ud-ink:      #1e2d3d;
  --ud-ink-2:    #2d4060;
  --ud-paper:    #f8f6f0;
  --ud-paper-2:  #f0ede4;
  --ud-paper-3:  #e2dbcc;
  --ud-gold:     #c9a84c;
  --ud-gold-2:   #bfa044;
  --ud-gold-3:   #fff8e6;
  --ud-teal:     #0a7a6a;
  --ud-teal-2:   #e0f5f0;
  --ud-border:   #e8e3d9;
  --ud-border-2: #dbd4c4;
  --ud-muted:    #6b7a8a;
  --ud-danger:   #e24b4a;
  --ud-success:  #1d9e75;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background-color: var(--ud-paper-2);
  color: var(--ud-ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Brand Header */
header {
  height: 56px;
  background: var(--ud-ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.25);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-left a {
  text-decoration: none;
  font-size: 18px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
}

.logo-img {
  width: 32px;
  height: 32px;
  border-radius: 5px;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: #ffffff;
  letter-spacing: -0.01em;
}

nav {
  display: flex;
  gap: 18px;
  align-items: center;
}

nav a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

nav a:hover {
  color: #ffffff;
}

nav .active-nav {
  color: var(--ud-gold);
  font-weight: 700;
}

/* Layout container */
.app-container {
  display: flex;
  flex-grow: 1;
  height: calc(100vh - 56px);
}

/* Sidebar configuration panel */
.sidebar {
  width: 320px;
  background: #ffffff;
  border-right: 1.5px solid var(--ud-border);
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: 2px 0 8px rgba(0,0,0,0.02);
}

.section-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ud-muted);
  margin-bottom: 0.75rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ud-ink);
}

input[type="text"], input[type="date"], input[type="number"], select {
  background: #ffffff;
  border: 1.5px solid var(--ud-border);
  color: var(--ud-ink);
  padding: 0.65rem 0.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: all 0.2s;
}

input:focus, select:focus {
  border-color: var(--ud-teal);
  box-shadow: 0 0 0 2px var(--ud-teal-2);
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
}

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

.checkbox-group label {
  cursor: pointer;
}

/* Editor Main Area */
.editor-area {
  flex-grow: 1;
  padding: 2rem 3rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: var(--ud-paper-2);
}

.editor-onboarding {
  text-align: center;
  margin-bottom: 2rem;
  max-width: 800px;
  width: 100%;
}

.editor-onboarding h1 {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--ud-ink);
  margin-bottom: 0.5rem;
}

.editor-onboarding p {
  color: var(--ud-muted);
  font-size: 1.05rem;
}

.editor-container {
  width: 100%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 4rem;
}

/* Live Document Sheet */
.document-sheet {
  background: #ffffff;
  border: 1px solid var(--ud-border-2);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
  padding: 3rem;
  min-height: 600px;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* Sheet Header Preview */
.sheet-meta-header {
  border-bottom: 2px solid var(--ud-paper-3);
  padding-bottom: 1.5rem;
  margin-bottom: 2.25rem;
}

.sheet-meta-header .meta-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ud-muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.sheet-meta-header h1 {
  font-family: var(--font-display);
  font-size: 2.4rem;
  color: var(--ud-ink);
  margin-bottom: 0.75rem;
}

.sheet-meta-header .meta-details {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--ud-muted);
}

.sheet-meta-header .meta-details strong {
  color: var(--ud-ink);
}

/* Block List Rendering inside Sheet */
.blocks-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex-grow: 1;
}

.block-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  position: relative;
}

.block-actions {
  display: flex;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity 0.2s;
  position: absolute;
  left: -48px;
  top: 8px;
}

.block-row:hover .block-actions {
  opacity: 1;
}

.btn-block-action {
  background: #ffffff;
  border: 1px solid var(--ud-border);
  border-radius: 4px;
  color: var(--ud-muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.25rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.btn-block-action:hover {
  color: var(--ud-danger);
  border-color: var(--ud-danger);
  background: rgba(226,75,74,0.05);
}

/* Content Editable block styling */
.block-input {
  flex-grow: 1;
  outline: none;
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--ud-ink);
  transition: all 0.15s;
}

.block-input:hover {
  border-color: var(--ud-border);
}

.block-input:focus {
  background: var(--ud-paper-2);
  border-color: var(--ud-teal);
}

.block-input[data-placeholder]:empty:before {
  content: attr(data-placeholder);
  color: var(--ud-muted);
  opacity: 0.5;
}

.block-heading {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 1rem;
}

.block-paragraph {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ud-muted);
}

.block-list-item {
  font-size: 1.05rem;
  display: list-item;
  list-style-type: disc;
  margin-left: 2rem;
  color: var(--ud-muted);
}

.block-divider-line {
  border: none;
  border-top: 1.5px solid var(--ud-border);
  margin: 1.5rem 0;
  width: 100%;
}

/* In-Sheet Toolbar */
.editor-toolbar {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.5rem 0 0;
  border-top: 1.5px solid var(--ud-paper-3);
  margin-top: 3rem;
}

.btn-toolbar {
  background: #ffffff;
  border: 1.5px solid var(--ud-border);
  color: var(--ud-ink);
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-toolbar:hover {
  background: var(--ud-paper-2);
  border-color: var(--ud-border-2);
}

/* Export Choices Panel */
.export-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.export-card {
  background: #ffffff;
  border: 1px solid var(--ud-border-2);
  border-radius: 12px;
  padding: 1.75rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.03);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.export-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ud-ink);
}

.export-card p {
  font-size: 0.875rem;
  color: var(--ud-muted);
  line-height: 1.5;
  flex-grow: 1;
}

.btn-export-choice {
  width: 100%;
  border: none;
  padding: 0.85rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.btn-export-choice.udr {
  background: transparent;
  border: 2px solid var(--ud-ink);
  color: var(--ud-ink);
}

.btn-export-choice.udr:hover {
  background: var(--ud-paper-2);
}

.btn-export-choice.uds {
  background: var(--ud-gold);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(200,150,10,0.2);
}

.btn-export-choice.uds:hover {
  background: #a67808;
  box-shadow: 0 4px 16px rgba(200,150,10,0.3);
}