:root {
  --bg: #0c0f14;
  --bg-elevated: #131820;
  --border: #243044;
  --text: #e8edf5;
  --muted: #8b98ab;
  --accent: #3d9eff;
  --accent-dim: #2568b8;
  --success: #3ecf8e;
  --warning: #f0c14c;
  --radius: 10px;
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(1200px 800px at 10% -10%, #1a2740 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 0%, #152a33 0%, transparent 50%), var(--bg);
  color: var(--text);
  line-height: 1.55;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #6bb8ff;
}

.app {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.header {
  margin-bottom: 1.5rem;
}

.status-banner {
  margin: 0 0 0.85rem;
  padding: 0.45rem 0.65rem;
  font-size: 0.82rem;
  font-weight: 600;
  text-align: center;
  border-radius: 8px;
  border: 1px solid rgba(240, 193, 76, 0.45);
  background: rgba(240, 193, 76, 0.12);
  color: #f5d88a;
}

.authorship-block {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.2);
}

.authorship-block p {
  margin: 0 0 0.45rem;
}

.authorship-block p:last-child {
  margin-bottom: 0;
}

.header h1 {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  max-width: 52rem;
}

.gpt-promo {
  margin-top: 1.35rem;
  padding: 1rem 1.15rem 1.1rem;
  border-radius: 12px;
  border: 1px solid rgba(94, 184, 255, 0.55);
  background: linear-gradient(
    155deg,
    rgba(61, 158, 255, 0.22) 0%,
    rgba(19, 24, 32, 0.92) 48%,
    rgba(12, 15, 20, 0.98) 100%
  );
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.35),
    0 10px 40px rgba(0, 0, 0, 0.45),
    0 0 48px rgba(61, 158, 255, 0.12);
}

.gpt-promo--footer {
  margin-top: 1.75rem;
  margin-bottom: 0.35rem;
  padding: 0.85rem 1rem 0.9rem;
  border-radius: 10px;
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.3),
    0 6px 24px rgba(0, 0, 0, 0.35),
    0 0 32px rgba(61, 158, 255, 0.1);
}

.gpt-promo-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #9ed4ff;
  margin: 0 0 0.65rem;
}

.gpt-promo--footer .gpt-promo-label {
  margin-bottom: 0.5rem;
}

.gpt-promo-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.1rem;
}

.gpt-promo-hint {
  margin: 0;
  flex: 1 1 12rem;
  font-size: 0.8rem;
  color: #c5d2e3;
  max-width: 32rem;
  line-height: 1.45;
}

.btn-gpt {
  font-family: var(--font);
  text-decoration: none;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.48rem 1rem;
  border-radius: 8px;
  border: 1px solid #7eb8ff;
  color: #030810;
  background: linear-gradient(180deg, #5eb4ff 0%, #2d7ec9 50%, #1a6aad 100%);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.28) inset,
    0 4px 14px rgba(61, 158, 255, 0.38),
    0 1px 4px rgba(0, 0, 0, 0.3);
  transition: transform 0.12s ease, filter 0.12s ease, box-shadow 0.12s ease;
}

.btn-gpt:hover {
  color: #02060c;
  filter: brightness(1.06);
  border-color: #a8d4ff;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.38) inset,
    0 5px 18px rgba(61, 158, 255, 0.48),
    0 2px 6px rgba(0, 0, 0, 0.32);
  transform: translateY(-1px);
}

.btn-gpt:active {
  transform: translateY(0);
  filter: brightness(0.97);
}

.footer {
  margin-top: 1rem;
  padding-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 0;
}

.progress {
  margin-bottom: 1.25rem;
}

.progress-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.progress-steps li {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(19, 24, 32, 0.6);
}

.progress-steps li.active {
  color: var(--text);
  border-color: var(--accent-dim);
  background: rgba(61, 158, 255, 0.12);
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.35rem 1rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.step-title {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.field-group {
  margin-bottom: 1.15rem;
}

.field-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
}

.help-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: help;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.help-trigger:hover,
.help-trigger:focus-visible {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: rgba(61, 158, 255, 0.1);
  outline: none;
}

.help-trigger[aria-expanded="true"] {
  color: var(--text);
  border-color: var(--accent);
}

.options {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.option {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.option:hover {
  background: rgba(255, 255, 255, 0.03);
}

.option:has(input:checked) {
  border-color: var(--accent-dim);
  background: rgba(61, 158, 255, 0.08);
}

.option input {
  margin-top: 0.2rem;
  accent-color: var(--accent);
}

.option-body strong {
  display: block;
  font-size: 0.92rem;
}

.option-body span {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.15rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.35rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.btn {
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  background: transparent;
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}

.btn-primary {
  background: linear-gradient(180deg, #4fa8ff 0%, var(--accent-dim) 100%);
  border-color: #5a9fd4;
  color: #061018;
}

.btn-primary:hover {
  filter: brightness(1.06);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

.results {
  margin-top: 1.25rem;
}

.results h2 {
  margin-top: 0;
}

.results-panel-kicker {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin: 0 0 0.35rem;
}

.results-panel-title {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
}

.results-panel-lede {
  margin: 0 0 1rem;
  font-size: 0.88rem;
  color: var(--muted);
  max-width: 52ch;
}

/* Top-down report (Part I) */
.report-hero {
  margin-bottom: 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border);
}

.report-title {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
}

.report-section {
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(36, 48, 68, 0.85);
}

.report-section:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0.5rem;
}

.report-section--recommend {
  margin-top: 1rem;
  padding: 1rem 1.05rem 1.1rem;
  border-radius: 10px;
  border: 1px solid rgba(61, 158, 255, 0.45) !important;
  background: linear-gradient(165deg, rgba(61, 158, 255, 0.12) 0%, rgba(10, 14, 20, 0.92) 55%);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25), 0 6px 28px rgba(0, 0, 0, 0.28);
}

.report-section--recommend .report-h3 {
  color: #b8dcff;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
}

.recommend-glance-lede {
  margin: 0 0 0.85rem;
  font-size: 0.88rem;
  line-height: 1.5;
  color: #c5d4e8;
}

.recommend-glance-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: rg;
}

.recommend-glance-item {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  margin: 0 0 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(36, 48, 68, 0.75);
}

.recommend-glance-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.recommend-glance-n {
  flex-shrink: 0;
  width: 1.65rem;
  height: 1.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: #061018;
  background: linear-gradient(180deg, #6eb8ff 0%, #2a7fd4 100%);
  border-radius: 8px;
}

.recommend-glance-main {
  flex: 1;
  min-width: 0;
}

.recommend-glance-title {
  display: block;
  font-size: 1.02rem;
  font-weight: 700;
  color: #e8f2ff;
  margin: 0 0 0.45rem;
  line-height: 1.3;
}

.recommend-glance-role p,
.recommend-glance-tuning p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text);
}

.recommend-glance-role p + p {
  margin-top: 0.4rem;
}

.recommend-glance-arch {
  margin-top: 0.55rem;
  padding: 0.55rem 0 0;
  border-top: 1px dashed rgba(100, 200, 140, 0.35);
}

.recommend-glance-arch .arch-block + .arch-block {
  margin-top: 0.65rem;
  padding-top: 0.55rem;
  border-top: 1px dashed rgba(100, 200, 140, 0.22);
}

.recommend-glance-arch p {
  margin: 0.25rem 0 0;
  font-size: 0.86rem;
  line-height: 1.55;
  color: #d0e8dc;
}

.algo-architecture {
  margin-top: 0.35rem;
}

.algo-architecture .arch-block + .arch-block {
  margin-top: 0.55rem;
  padding-top: 0.45rem;
  border-top: 1px dashed rgba(36, 48, 68, 0.75);
}

.algo-architecture p {
  margin: 0.25rem 0 0;
  font-size: 0.87rem;
  line-height: 1.55;
}

.algo-sec--arch p {
  font-size: 0.87rem;
  line-height: 1.55;
}

.recommend-glance-tuning {
  margin-top: 0.65rem;
  padding-top: 0.6rem;
  border-top: 1px dashed rgba(61, 158, 255, 0.25);
}

.recommend-glance-k {
  display: block;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #8ec9ff;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.recommend-glance-path-wrap .path-enumeration {
  margin-top: 0;
}

.report-context-wrap {
  margin-top: 1.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border);
}

.report-context-wrap .report-part-title {
  font-size: 0.98rem;
  color: #a8b8d0;
}

.report-context-wrap .report-part-lede {
  margin-bottom: 0.75rem;
}

.report-context-wrap .report-section:first-of-type {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.report-h3 {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #a8b8d0;
  font-weight: 600;
}

.report-section-body {
  font-size: 0.9rem;
}

.report-section-body .paper-note:first-child {
  margin-top: 0;
}

.report-lede {
  margin: 0;
}

.report-subsection {
  margin-top: 0.75rem;
}

.report-h4 {
  margin: 0 0 0.25rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.report-list {
  margin: 0.35rem 0 0;
  padding-left: 1.15rem;
}

.report-list li {
  margin-bottom: 0.35rem;
}

.report-list li:last-child {
  margin-bottom: 0;
}

/* Part II — algorithms */
.report-body-intro {
  margin: 1.5rem 0 0.85rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.report-part-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.report-part-lede {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
  max-width: 58ch;
}

.algo-title {
  font-size: 1rem;
  margin: 0 0 0.65rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(36, 48, 68, 0.65);
}

.algo-h4 {
  margin: 0 0 0.25rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.algo-sec {
  margin-top: 0.65rem;
}

.algo-sec:first-of-type {
  margin-top: 0;
}

.extras-h3 {
  margin: 0 0 0.45rem;
  font-size: 0.92rem;
}

.extras-further {
  margin-top: 1rem;
}

.article-snippet {
  margin-top: 0.85rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(36, 48, 68, 0.55);
}

.article-snippet:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.article-snippet-title {
  margin: 0 0 0.4rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: #c5d4eb;
}

.article-snippet-body p {
  margin: 0.35rem 0 0;
  font-size: 0.88rem;
}

.article-snippet-body p:first-child {
  margin-top: 0;
}

.article-cite {
  margin: 1rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(36, 48, 68, 0.55);
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}

.article-cite cite {
  font-style: normal;
}

.repo-alignment-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  margin: 0.35rem 0 0;
}

.repo-alignment-table th,
.repo-alignment-table td {
  border: 1px solid var(--border);
  padding: 0.45rem 0.55rem;
  text-align: left;
  vertical-align: top;
}

.repo-alignment-table th {
  background: rgba(0, 0, 0, 0.25);
  color: #b8c8e0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.repo-alignment-note {
  margin: 0.65rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.45;
}

.repo-alignment-note:last-child {
  margin-top: 0.4rem;
}

.path-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: rgba(61, 158, 255, 0.15);
  color: #9fd0ff;
  margin-bottom: 0.75rem;
}

.flag-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.75rem 0 1rem;
}

.pill {
  font-size: 0.75rem;
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.pill.nn {
  border-color: #5a7a4a;
  color: #b8e0a0;
  background: rgba(100, 180, 80, 0.1);
}

.pill.mha {
  border-color: #7a6a4a;
  color: #f0d090;
  background: rgba(200, 160, 80, 0.1);
}

.pill.tinyml {
  border-color: #4a6a8a;
  color: #9fd0ff;
  background: rgba(80, 140, 200, 0.12);
}

.pill.piml {
  border-color: #6a4a7a;
  color: #e0b0ff;
  background: rgba(160, 100, 200, 0.1);
}

.algo-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1rem 0.85rem;
  margin-bottom: 1rem;
  background: rgba(0, 0, 0, 0.15);
}

.algo-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: #cfe4ff;
}

.algo-card section {
  margin-bottom: 0.65rem;
  font-size: 0.88rem;
}

.algo-card h4 {
  margin: 0 0 0.25rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  font-weight: 600;
}

.link-list {
  margin: 0;
  padding-left: 1.1rem;
}

.link-list li {
  margin-bottom: 0.25rem;
}

.paper-note {
  font-size: 0.85rem;
  color: var(--muted);
  border-left: 3px solid var(--accent-dim);
  padding: 0.5rem 0.75rem;
  margin: 0.5rem 0 0;
  background: rgba(61, 158, 255, 0.06);
  border-radius: 0 6px 6px 0;
}

.extras-box {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  font-size: 0.86rem;
}

.extras-box h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
}

.enrich-box {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(19, 24, 32, 0.65);
  font-size: 0.86rem;
}

.enrich-box h3 {
  margin: 0 0 0.55rem;
  font-size: 0.95rem;
  color: #c5d4eb;
}

.enrich-box h4 {
  margin: 0.65rem 0 0.25rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.enrich-section p {
  margin: 0.25rem 0 0;
}

.enrich-subsections p {
  margin: 0.45rem 0 0;
}

.enrich-path-enum .scarce-path {
  border-left-color: var(--warning);
  background: rgba(240, 193, 76, 0.08);
}

/* Tooltip */
.tooltip-layer {
  position: fixed;
  z-index: 1000;
  pointer-events: none;
  max-width: min(420px, calc(100vw - 24px));
}

.tooltip-bubble {
  pointer-events: none;
  background: #1a2332;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  font-size: 0.82rem;
  line-height: 1.45;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

.tooltip-bubble strong {
  color: #b8d4ff;
}

@media (max-width: 540px) {
  .header h1 {
    font-size: 1.3rem;
  }
}