:root {
  color-scheme: dark;
  --bg: #060711;
  --surface: rgba(15, 18, 36, 0.82);
  --surface-strong: rgba(18, 22, 44, 0.94);
  --surface-soft: rgba(255, 255, 255, 0.03);
  --border: rgba(147, 92, 255, 0.2);
  --border-strong: rgba(68, 224, 255, 0.34);
  --text: #eff2ff;
  --muted: rgba(220, 228, 255, 0.68);
  --accent: #8e6bff;
  --accent-cyan: #3fe6ff;
  --accent-pink: #ff5edb;
  --shadow: 0 28px 70px rgba(4, 8, 24, 0.48);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  font-family: "Manrope", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(100, 91, 255, 0.18), transparent 28%),
    radial-gradient(circle at 85% 18%, rgba(63, 230, 255, 0.16), transparent 24%),
    linear-gradient(180deg, #070914 0%, #05060d 55%, #04050a 100%);
  color: var(--text);
  overflow-x: hidden;
}

.page-noise,
.page-grid,
.page-orb {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.page-noise {
  opacity: 0.05;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.55) 1px, transparent 0);
  background-size: 22px 22px;
}

.page-grid {
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(142, 107, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(142, 107, 255, 0.12) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.44), transparent 90%);
}

.page-orb {
  filter: blur(80px);
  opacity: 0.42;
}

.page-orb--violet {
  inset: auto auto 68% -6%;
  width: 420px;
  height: 420px;
  background: rgba(142, 107, 255, 0.25);
}

.page-orb--cyan {
  inset: 12% -8% auto auto;
  width: 360px;
  height: 360px;
  background: rgba(63, 230, 255, 0.18);
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1320px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 24px 0 72px;
}

.app-header,
.hero-panel,
.panel,
.footer-panel {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(15, 18, 36, 0.9), rgba(10, 13, 26, 0.86));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 22px;
  border-radius: var(--radius-lg);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  color: var(--accent-cyan);
  background: linear-gradient(135deg, rgba(142, 107, 255, 0.24), rgba(63, 230, 255, 0.14));
  border: 1px solid rgba(143, 118, 255, 0.26);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.12);
}

.brand-icon svg {
  width: 28px;
  height: 28px;
}

.brand-kicker,
.panel-eyebrow,
.hero-eyebrow {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  font-family: "Orbitron", sans-serif;
}

.brand-name {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.1);
  text-decoration: none;
  color: var(--text);
  background: rgba(255,255,255,0.03);
  transition: transform 180ms ease, border-color 180ms ease, color 180ms ease;
}

.back-link:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
  color: var(--accent-cyan);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

.hero-panel {
  margin-top: 20px;
  padding: 34px 34px 30px;
  border-radius: var(--radius-xl);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.hero-copy {
  max-width: 760px;
}

.hero-title {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: baseline;
  font-size: clamp(34px, 6vw, 68px);
  line-height: 0.98;
  font-weight: 800;
}

.accent-word {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-description {
  margin: 18px 0 0;
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
  justify-content: flex-end;
}

.hero-badge {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
  font-size: 13px;
  color: rgba(239, 242, 255, 0.8);
}

.workspace {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 22px;
}

.panel {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.panel-header h2 {
  margin: 0;
  font-size: 28px;
}

.control-block + .control-block,
.editor-shell,
.action-row,
.signal-meta,
.preview-card,
.preview-meta,
.notes-list {
  margin-top: 18px;
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  color: rgba(239, 242, 255, 0.88);
  font-size: 14px;
}

.toolbar-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.toolbar-btn,
.action-btn {
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.toolbar-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  min-height: 84px;
  padding: 14px;
  border-radius: 18px;
  text-align: left;
}

.toolbar-btn strong {
  font-size: 16px;
}

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

.toolbar-btn:hover,
.action-btn:hover {
  transform: translateY(-1px);
  border-color: var(--border-strong);
  box-shadow: 0 14px 34px rgba(63, 230, 255, 0.12);
}

.editor-shell {
  display: flex;
  flex-direction: column;
}

#markdown-input,
#html-output {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(8, 10, 22, 0.95), rgba(10, 13, 28, 0.88));
  color: var(--text);
  border-radius: 22px;
  padding: 20px 22px;
  font: 500 15px/1.8 "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  outline: none;
  resize: none;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

#markdown-input {
  min-height: 560px;
}

#html-output {
  min-height: 220px;
}

#markdown-input:focus,
#html-output:focus {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 4px rgba(63, 230, 255, 0.08);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.action-btn {
  padding: 12px 16px;
  border-radius: 999px;
  font-size: 14px;
}

.action-btn--primary {
  background: linear-gradient(135deg, rgba(142, 107, 255, 0.24), rgba(63, 230, 255, 0.18));
  border-color: rgba(143, 118, 255, 0.34);
}

.signal-meta,
.preview-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.meta-item,
.meta-card {
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  padding: 14px 16px;
}

.meta-item span,
.meta-card span {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.meta-item strong,
.meta-card strong {
  font-size: 14px;
  line-height: 1.5;
}

.meta-card--wide {
  grid-column: span 2;
}

.preview-stage {
  position: relative;
  min-height: 420px;
}

.preview-empty,
.preview-surface {
  min-height: 420px;
  border-radius: 26px;
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, rgba(9, 11, 24, 0.96), rgba(11, 13, 28, 0.88));
}

.preview-empty {
  display: grid;
  place-items: center;
  text-align: center;
  padding: 36px;
}

.empty-icon {
  width: 84px;
  height: 84px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 24px;
  color: var(--accent-cyan);
  background: linear-gradient(135deg, rgba(142, 107, 255, 0.2), rgba(63, 230, 255, 0.16));
}

.empty-icon svg {
  width: 36px;
  height: 36px;
}

.preview-empty h3 {
  margin: 0;
  font-size: 28px;
}

.preview-empty p {
  max-width: 520px;
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.preview-surface {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.preview-surface__head,
.preview-card__head {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: var(--accent-cyan);
  font-family: "Orbitron", sans-serif;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.markdown-body {
  padding: 26px;
  overflow: auto;
  color: rgba(239, 242, 255, 0.92);
  line-height: 1.78;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  margin: 1.3em 0 0.6em;
  line-height: 1.2;
}

.markdown-body h1,
.markdown-body h2 {
  padding-bottom: 0.4em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body table,
.markdown-body blockquote,
.markdown-body pre {
  margin: 0 0 1em;
}

.markdown-body a {
  color: var(--accent-cyan);
}

.markdown-body code {
  padding: 0.18em 0.45em;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  font-family: "SFMono-Regular", Consolas, monospace;
}

.markdown-body pre {
  padding: 18px;
  overflow: auto;
  border-radius: 18px;
  background: rgba(0, 0, 0, 0.36);
  border: 1px solid rgba(255,255,255,0.08);
}

.markdown-body pre code {
  padding: 0;
  border: 0;
  background: transparent;
}

.markdown-body blockquote {
  padding: 14px 18px;
  border-left: 3px solid var(--accent-cyan);
  background: rgba(255,255,255,0.03);
  color: rgba(239, 242, 255, 0.72);
  border-radius: 0 16px 16px 0;
}

.markdown-body table {
  width: 100%;
  border-collapse: collapse;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid rgba(255,255,255,0.08);
  padding: 10px 12px;
  text-align: left;
}

.markdown-body th {
  color: var(--accent-cyan);
  background: rgba(255,255,255,0.04);
}

.preview-card {
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  overflow: hidden;
}

.preview-card__body {
  padding: 18px;
}

.notes-list {
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.03);
  padding: 20px 22px;
}

.notes-list h3 {
  margin: 0 0 14px;
  font-size: 18px;
}

.notes-list ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.footer-panel {
  margin-top: 24px;
  border-radius: var(--radius-xl);
  padding: 24px 28px;
}

.footer-copy h2 {
  margin: 0 0 10px;
  font-size: 28px;
}

.footer-copy p:last-child {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.markdown-toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 100;
  padding: 13px 16px;
  border-radius: 16px;
  border: 1px solid rgba(63, 230, 255, 0.26);
  background: rgba(6, 10, 22, 0.92);
  color: var(--text);
  box-shadow: 0 18px 40px rgba(0,0,0,0.34);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.markdown-toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  #markdown-input {
    min-height: 420px;
  }
}

@media (max-width: 760px) {
  .app-shell {
    width: min(100vw - 22px, 1320px);
    padding-top: 14px;
  }

  .app-header,
  .hero-panel,
  .panel,
  .footer-panel {
    padding-left: 18px;
    padding-right: 18px;
  }

  .app-header,
  .hero-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .toolbar-grid,
  .signal-meta,
  .preview-meta {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .toolbar-grid,
  .signal-meta,
  .preview-meta {
    grid-template-columns: 1fr;
  }

  .meta-card--wide {
    grid-column: span 1;
  }

  .hero-title {
    font-size: 34px;
  }
}