/* =========================================================
   Nonno Text Card Editor – UI v1.2 FINAL
   Additions:
   - Export Size (platform-based) UI
   - Same visual hierarchy as Letter Spacing
   - Calm, editorial, non-app-like
========================================================= */

/* ---------------------------------------------------------
   Design Tokens
--------------------------------------------------------- */
:root {
  --panel-width: 360px;

  --bg-app: #F9FAFB;
  --bg-panel: #FFFFFF;

  --border-soft: #E5E7EB;

  --text-main: #111827;
  --text-muted: #6B7280;
  --text-faint: #9CA3AF;

  --accent: #111827;
}

/* ---------------------------------------------------------
   Base Reset
--------------------------------------------------------- */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-main);
  background: var(--bg-app);
}

/* ---------------------------------------------------------
   App Layout
--------------------------------------------------------- */
.app {
  display: flex;
  height: 100vh;
}

/* ---------------------------------------------------------
   Preview Area (Editorial Canvas)
--------------------------------------------------------- */
.preview-area {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 32px;
  background: var(--bg-app);
}

/* Card = near-final output size */
.preview-card {
  width: 520px;
  min-height: 320px;

  background: #FFFFFF;
  border-radius: 24px;
  padding: 48px;

  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.1);

  display: flex;
  align-items: center;
  justify-content: center;

  position: relative;
}

/* Card text */
.card-text {
  width: 100%;
  text-align: center;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Optional theme tag */
.card-tag {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: rgba(17, 24, 39, 0.45);
  letter-spacing: 0.04em;
}

/* ---------------------------------------------------------
   Control Panel
--------------------------------------------------------- */
.control-panel {
  width: var(--panel-width);
  padding: 24px 24px 32px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-soft);
  overflow-y: auto;
}

.panel-title {
  margin: 0 0 20px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ---------------------------------------------------------
   Form Groups
--------------------------------------------------------- */
.form-group {
  margin-bottom: 22px;
}

.label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ---------------------------------------------------------
   Textarea
--------------------------------------------------------- */
.textarea {
  width: 100%;
  min-height: 96px;
  padding: 12px 14px;

  border: 1px solid var(--border-soft);
  border-radius: 12px;

  font-size: 14px;
  line-height: 1.6;

  resize: vertical;
  outline: none;
}

.textarea:focus {
  border-color: var(--text-main);
}

/* ---------------------------------------------------------
   Select
--------------------------------------------------------- */
.select {
  width: 100%;
  height: 40px;
  padding: 0 12px;

  border: 1px solid var(--border-soft);
  border-radius: 12px;

  background: #FFFFFF;
  font-size: 13px;
}

.select:focus {
  outline: none;
  border-color: var(--text-main);
}

/* ---------------------------------------------------------
   Style Grid (Theme Selector)
--------------------------------------------------------- */
.style-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.style-item {
  height: 56px;
  border-radius: 14px;
  border: 1px solid var(--border-soft);

  display: flex;
  align-items: center;
  justify-content: center;

  font-size: 13px;
  font-weight: 700;
  cursor: pointer;

  user-select: none;
  transition: border-color .15s ease, transform .15s ease;
}

.style-item:hover {
  border-color: #9CA3AF;
}

.style-item.is-active {
  border: 2px solid var(--accent);
  transform: translateY(-1px);
}

/* ---------------------------------------------------------
   Range Sliders
--------------------------------------------------------- */
.range-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.range-row input[type="range"] {
  flex: 1;
}

.range-value {
  width: 56px;
  text-align: right;
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------------------------------------------------------
   Text Alignment – Editorial Tabs
--------------------------------------------------------- */
.letter-spacing-group {
  display: flex;
  gap: 18px;
}

.align-btn {
  background: none;
  border: 0;
  padding: 6px 8px;

  font-size: 13px;
  font-weight: 600;
  color: var(--text-faint);

  cursor: pointer;
  position: relative;

  display: flex;
  align-items: center;
  justify-content: center;
}

.align-btn svg {
  display: block;
  width: 16px;
  height: 16px;
}

.align-btn:hover {
  color: var(--text-muted);
}

.align-btn.is-active {
  color: var(--text-main);
}

.align-btn.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
}

/* ---------------------------------------------------------
   Export Error Banner
--------------------------------------------------------- */
.export-error {
  background: #FEE2E2;
  color: #991B1B;
  padding: 8px 12px;
  border-radius: 10px;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.4;
}

/* ---------------------------------------------------------
   Export Size Selector
--------------------------------------------------------- */
.export-grid {
  display: flex;
  gap: 12px;
}

.export-btn {
  flex: 1;
  height: 40px;
  border-radius: 12px;
  background: #FFFFFF;
  border: 1px solid var(--border-soft);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}

.export-btn:hover {
  border-color: #9CA3AF;
}

.export-btn.is-active {
  border: 2px solid var(--accent);
  color: var(--text-main);
}

/* ---------------------------------------------------------
   Primary Action Button
--------------------------------------------------------- */
.btn-primary {
  width: 100%;
  height: 48px;

  border: 0;
  border-radius: 14px;

  background: var(--accent);
  color: #FFFFFF;

  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;

  cursor: pointer;
}

.btn-primary:hover {
  background: #000000;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---------------------------------------------------------
   Responsive
--------------------------------------------------------- */
@media (max-width: 768px) {
  .app {
    flex-direction: column;
  }

  .control-panel {
    width: 100%;
    border-left: 0;
    border-top: 1px solid var(--border-soft);
  }

  .preview-card {
    width: min(92%, 520px);
    padding: 36px;
  }
}