:root {
  --bg: #f5f5f3;
  --panel: #ffffff;
  --panel-strong: #ffffff;
  --border: #dfdfda;
  --text: #202124;
  --muted: #676b73;
  --accent: #1f1f1f;
  --accent-dark: #111111;
  --accent-soft: #f1f1ef;
  --success: #1e6a43;
  --error: #a12d2d;
  --shadow: 0 8px 24px rgba(17, 17, 17, 0.06);
  --radius-xl: 18px;
  --radius-lg: 14px;
  --radius-md: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Plus Jakarta Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 28px;
}

.topbar {
  margin-bottom: 18px;
}

.eyebrow,
.panel-label {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--accent-dark);
}

.topbar h1,
.panel h2 {
  margin: 0;
  line-height: 1.05;
}

.topbar h1 {
  font-size: 1.2rem;
  font-weight: 700;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.summary-pill,
textarea,
.status-box,
.output-box {
  font-family: "IBM Plex Mono", monospace;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
}

.panel {
  min-height: 620px;
  padding: 10px;
  display: flex;
  flex-direction: column;
}

.panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
}

.panel-actions {
  display: flex;
  gap: 8px;
}

.panel h2 {
  font-size: 1rem;
}

.controls-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}

.control,
.editor-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 500;
  color: var(--muted);
  font-size: 0.88rem;
}

.output-controls {
  display: flex;
  align-items: end;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: nowrap;
}

.control-inline {
  min-width: 0;
  width: auto;
  flex: 0 0 auto;
}

.control-inline input[type="number"] {
  width: 84px;
}

.control input[type="file"],
.control input[type="number"],
.control select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel-strong);
  color: var(--text);
}

.control input[type="file"] {
  padding: 8px 10px;
}

.control input[type="number"] {
  padding: 9px 11px;
}

.control select {
  padding: 9px 11px;
}

textarea {
  min-height: 440px;
  resize: vertical;
  padding: 10px 12px;
  line-height: 1.45;
  font-size: 0.82rem;
}

textarea:focus,
input:focus,
select:focus,
button:focus {
  outline: 3px solid rgba(31, 31, 31, 0.08);
  outline-offset: 2px;
}

.primary-button,
.secondary-button,
.ghost-button {
  border-radius: 999px;
  padding: 9px 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.primary-button {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #ffffff;
  box-shadow: none;
}

.secondary-button,
.ghost-button {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--border);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover {
  transform: translateY(-1px);
}

.status-box {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: #fafaf9;
  border: 1px solid var(--border);
  line-height: 1.45;
  color: var(--muted);
  font-size: 0.82rem;
}

.status-box[hidden] {
  display: none;
}

.status-box.success {
  color: var(--success);
  border-color: rgba(35, 109, 77, 0.24);
  background: rgba(35, 109, 77, 0.08);
}

.status-box.error {
  color: var(--error);
  border-color: rgba(159, 45, 45, 0.24);
  background: rgba(159, 45, 45, 0.08);
}

.summary-pill {
  align-self: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.72rem;
  text-align: center;
}

.output-box {
  width: 100%;
  min-height: 440px;
  resize: vertical;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel-strong);
  color: var(--text);
  line-height: 1.45;
  font-size: 0.92rem;
}

.output-box-wrap {
  position: relative;
}

.output-box-wrap .output-box {
  padding-top: 36px;
}

.icon-button {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #ffffff;
  color: var(--muted);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.icon-button svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.icon-button.copied {
  color: var(--success);
  border-color: rgba(35, 109, 77, 0.3);
}

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

  .panel {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1240px);
    padding-top: 16px;
  }

  .controls-grid,
  .panel-header,
  .panel-actions {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .output-controls {
    flex-wrap: wrap;
    align-items: stretch;
  }

  .summary-pill {
    align-self: stretch;
  }

  textarea {
    min-height: 340px;
  }
}