:root {
  color-scheme: light;
  --bg: #f7f1e8;
  --bg-accent: #fde7c5;
  --panel: #ffffff;
  --panel-alt: #fff7ec;
  --ink: #1f1a16;
  --muted: #6f6258;
  --line: #e6d9ca;
  --accent: #f06c3a;
  --accent-soft: #ffd9c8;
  --valid: #1e7d5a;
  --invalid: #c23b30;
  --processing: #b56b1f;
  --radius: 14px;
  --shadow: 0 18px 45px rgba(53, 38, 27, 0.12);
  --editor-padding-y: 12px;
  --editor-padding-x: 14px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "DM Sans", "Gill Sans", "Trebuchet MS", sans-serif;
  background: radial-gradient(circle at 5% 0%, var(--bg-accent), var(--bg) 55%),
    linear-gradient(180deg, #fff7ef 0%, #f6efe6 60%, #f1e9de 100%);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 32px 16px 56px;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.12),
      rgba(255, 255, 255, 0.12) 1px,
      transparent 1px,
      transparent 80px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.08),
      rgba(255, 255, 255, 0.08) 1px,
      transparent 1px,
      transparent 80px
    );
  pointer-events: none;
  opacity: 0.4;
}

.app {
  width: min(1200px, 96vw);
  position: relative;
  z-index: 1;
  animation: fadeIn 0.6s ease forwards;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 24px;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.8rem);
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  background: var(--panel);
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.settings {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: center;
  flex: 1 1 420px;
}

.field {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  color: var(--muted);
  gap: 6px;
}

.field select {
  font-family: inherit;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.toggle input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

.compact-hint {
  font-size: 0.78rem;
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--panel-alt);
  border: 1px solid var(--line);
}

.toolbar {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  flex: 0 0 auto;
}

.tool-btn {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 8px 10px;
  font-size: 1.05rem;
  cursor: pointer;
  box-shadow: 0 6px 12px rgba(68, 40, 22, 0.08);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

.tool-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  display: block;
}

.tool-btn:hover:enabled {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(68, 40, 22, 0.12);
}

.tool-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
}

.toast {
  min-width: 140px;
  color: var(--muted);
  font-size: 0.85rem;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.toast.show {
  opacity: 1;
}

.editors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 26px;
}

.editor-pane {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 16px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: paneRise 0.5s ease forwards;
}

.editor-pane[data-pane="output"] {
  animation-delay: 0.1s;
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.pane-title {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--muted);
}

.caret-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.caret-display {
  font-family: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.jump-editor {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.jump-editor input {
  width: 86px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-family: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;
}

.jump-editor button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 6px 8px;
  cursor: pointer;
}

.jump-error {
  font-size: 0.75rem;
  color: var(--invalid);
}

.caret-control.is-editing .caret-display {
  display: none;
}

.caret-control.is-editing .jump-editor {
  display: inline-flex;
}

.pane-status {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.global-status {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.9rem;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel-alt);
}

.global-status.status-valid {
  border-color: rgba(30, 125, 90, 0.4);
  color: var(--valid);
}

.global-status.status-invalid {
  border-color: rgba(194, 59, 48, 0.4);
  color: var(--invalid);
}

.global-status.status-processing {
  border-color: rgba(181, 107, 31, 0.4);
  color: var(--processing);
}

.global-status.status-empty {
  color: var(--muted);
}

.status-location {
  color: var(--muted);
}

.link-button {
  border: none;
  background: none;
  color: var(--accent);
  cursor: pointer;
  font-weight: 600;
}

.error-details {
  font-size: 0.85rem;
  color: var(--muted);
}

.error-details pre {
  margin: 8px 0 0;
  padding: 10px 12px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid var(--line);
  overflow-x: auto;
}

.editor-body {
  display: grid;
  grid-template-columns: 3.4rem 1fr;
  border-radius: 12px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: #fff;
}

.gutter {
  background: #f4eee6;
  border-right: 1px solid var(--line);
  padding: var(--editor-padding-y) 8px;
  text-align: right;
  font-family: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #8a7a6b;
  user-select: none;
  overflow: hidden;
}

.gutter-line {
  line-height: 1.5;
}

textarea {
  width: 100%;
  min-height: 360px;
  padding: var(--editor-padding-y) var(--editor-padding-x);
  border: none;
  resize: vertical;
  font-family: "IBM Plex Mono", "SFMono-Regular", "Menlo", "Consolas", monospace;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--ink);
  background: #fff;
  outline: none;
}

textarea[readonly] {
  background: #fcf7f1;
}

.summary-panel {
  margin-top: 24px;
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  animation: fadeIn 0.4s ease;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px 18px;
  margin-bottom: 14px;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--panel-alt);
  border: 1px solid var(--line);
}

.summary-item .label {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.summary-item .value {
  font-weight: 600;
  color: var(--ink);
}

.summary-duplicates {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.duplicates-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.duplicates-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.duplicate-item {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.82rem;
  cursor: pointer;
}

.duplicate-item:hover {
  border-color: var(--accent);
  color: var(--accent);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes paneRise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .editors {
    grid-template-columns: 1fr;
  }

  textarea {
    min-height: 300px;
  }
}

@media (max-width: 680px) {
  body {
    padding: 24px 12px 48px;
  }

  .controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .toolbar {
    flex-wrap: wrap;
  }

  .compact-hint {
    width: 100%;
  }
}