:root {
  --bg: #13100f;
  --panel: rgba(28, 21, 18, 0.88);
  --panel-strong: rgba(35, 26, 22, 0.96);
  --panel-soft: rgba(255, 246, 238, 0.06);
  --text: #f9f0e7;
  --muted: #c5b3a6;
  --line: rgba(255, 240, 228, 0.12);
  --accent: #ef6d3f;
  --accent-strong: #f4a261;
  --good: #8bd3a8;
  --warn: #f9c74f;
  --danger: #f28482;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

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

body {
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(239, 109, 63, 0.18), transparent 24%),
    radial-gradient(circle at bottom right, rgba(122, 162, 247, 0.13), transparent 18%),
    linear-gradient(180deg, #0d0a09 0%, #171110 55%, #100d0c 100%);
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

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

a {
  color: inherit;
}

.app-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 22px 18px 36px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #f16d3f, #8c2f16);
  color: #fffaf7;
  font-weight: 800;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-copy span {
  color: var(--muted);
  font-size: 12px;
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(340px, 520px) minmax(0, 1fr);
  gap: 18px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.input-panel,
.output-panel {
  padding: 22px;
}

.panel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.panel-header.compact {
  margin-bottom: 14px;
}

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

h1,
h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  line-height: 0.95;
}

h1 {
  font-size: clamp(2.1rem, 4vw, 3rem);
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.supporting {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.mode-switch,
.tab-row,
.action-row,
.runtime-grid,
.summary-grid {
  display: flex;
  gap: 10px;
}

.mode-switch,
.tab-row {
  flex-wrap: wrap;
}

.mode-chip,
.tab,
.button,
.readout,
.status-banner,
.dropzone,
.summary-card,
.runtime-card {
  border: 1px solid var(--line);
}

.mode-chip,
.tab,
.button {
  appearance: none;
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.mode-chip,
.tab {
  padding: 10px 14px;
}

.mode-chip.is-active,
.tab.is-active {
  background: rgba(239, 109, 63, 0.18);
  border-color: rgba(239, 109, 63, 0.4);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  text-decoration: none;
}

.button:hover,
.mode-chip:hover,
.tab:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #d14e1f);
  border-color: transparent;
  color: #fff8f3;
}

.button-ghost {
  background: rgba(255, 255, 255, 0.02);
}

.mode-pane {
  display: none;
  margin-top: 18px;
}

.mode-pane.is-active {
  display: block;
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.field > span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

input,
textarea,
.readout,
.dropzone {
  width: 100%;
  border-radius: 22px;
  background: var(--panel-strong);
  color: var(--text);
}

input,
textarea {
  border: 1px solid var(--line);
  padding: 14px 16px;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: rgba(239, 109, 63, 0.48);
  box-shadow: 0 0 0 4px rgba(239, 109, 63, 0.12);
}

textarea {
  min-height: 280px;
  resize: vertical;
  line-height: 1.5;
}

.action-row {
  flex-wrap: wrap;
  margin-top: 16px;
}

.action-row.tight {
  margin-top: 0;
}

.status-banner {
  margin-top: 18px;
  border-radius: 20px;
  padding: 14px 16px;
  line-height: 1.55;
}

.status-banner[data-variant="info"] {
  background: rgba(122, 162, 247, 0.12);
}

.status-banner[data-variant="success"] {
  background: rgba(139, 211, 168, 0.12);
}

.status-banner[data-variant="warning"] {
  background: rgba(249, 199, 79, 0.12);
}

.status-banner[data-variant="error"] {
  background: rgba(242, 132, 130, 0.12);
}

.dropzone {
  margin-top: 18px;
  min-height: 220px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 20px;
  border-style: dashed;
}

.dropzone strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.dropzone p {
  margin: 0 0 16px;
  color: var(--muted);
}

.dropzone.is-dragging {
  border-color: rgba(239, 109, 63, 0.48);
  background: rgba(239, 109, 63, 0.08);
}

.compact-field {
  margin-top: 18px;
}

.readout {
  min-height: 50px;
  padding: 14px 16px;
  display: flex;
  align-items: center;
}

.inset-panel {
  margin-top: 22px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.runtime-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.runtime-card,
.summary-card {
  border-radius: 22px;
  padding: 16px;
  background: rgba(255, 250, 245, 0.04);
}

.runtime-card strong,
.summary-card strong {
  display: block;
  margin-top: 8px;
  font-size: 20px;
}

.runtime-label,
.summary-card span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.empty-state {
  margin-top: 20px;
  border-radius: 24px;
  padding: 22px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--line);
}

.summary-panel {
  margin-top: 20px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 16px;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.code-block {
  margin: 14px 0 0;
  min-height: 420px;
  max-height: 68vh;
  overflow: auto;
  padding: 18px;
  border-radius: 24px;
  background: #0f0c0b;
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: #f6eee7;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.preview-frame {
  width: 100%;
  min-height: 420px;
  margin-top: 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 24px;
  background: white;
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .app-shell {
    padding-inline: 12px;
  }

  .topbar,
  .panel-header {
    flex-direction: column;
    align-items: stretch;
  }

  .input-panel,
  .output-panel {
    padding: 18px;
  }

  .runtime-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .preview-frame,
  .code-block {
    min-height: 320px;
  }
}