:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: rgba(15, 23, 42, 0.82);
  --panel-border: rgba(148, 163, 184, 0.18);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --shadow: 0 24px 60px rgba(2, 6, 23, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(56, 189, 248, 0.18), transparent 30%),
    linear-gradient(180deg, #020617 0%, #0f172a 100%);
  color: var(--text);
}

button,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.topbar {
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 0;
}

h1 {
  margin-bottom: 10px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.subtitle {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.6;
}

.workspace {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.panel {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}

.panel-header h2 {
  margin: 0;
  font-size: 1rem;
}

#reset-button {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(56, 189, 248, 0.16);
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

#reset-button:hover {
  background: rgba(56, 189, 248, 0.28);
  transform: translateY(-1px);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.16);
  color: #86efac;
  font-size: 0.9rem;
}

.status-pill::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

#editor {
  flex: 1;
  width: 100%;
  border: 0;
  resize: none;
  padding: 20px;
  background: transparent;
  color: var(--text);
  line-height: 1.7;
  outline: none;
}

.preview-content {
  flex: 1;
  padding: 20px;
  overflow: auto;
  line-height: 1.75;
}

.preview-content a {
  color: #7dd3fc;
}

.preview-content pre,
.preview-content code {
  font-family: "SFMono-Regular", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
}

.preview-content pre {
  padding: 16px;
  border-radius: 14px;
  overflow: auto;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.16);
}

.preview-content :not(pre) > code {
  padding: 0.18em 0.4em;
  border-radius: 8px;
  background: rgba(148, 163, 184, 0.14);
}

.preview-content blockquote {
  margin: 1.25rem 0;
  padding: 0.2rem 0 0.2rem 1rem;
  border-left: 4px solid var(--accent-strong);
  color: #cbd5e1;
}

.preview-content table {
  width: 100%;
  border-collapse: collapse;
}

.preview-content th,
.preview-content td {
  padding: 10px 12px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  text-align: left;
}

.preview-content img {
  max-width: 100%;
  border-radius: 14px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .panel {
    min-height: 48vh;
  }
}