:root {
  --algo-bg: #07111f;
  --algo-surface: rgba(8, 25, 46, 0.7);
  --algo-surface-strong: rgba(8, 25, 46, 0.88);
  --algo-line: rgba(142, 208, 255, 0.18);
  --algo-text: #ebf4ff;
  --algo-muted: #9ab0c9;
  --algo-accent: #5ad1ff;
  --algo-accent-2: #ffd166;
  --algo-accent-3: #49f3b3;
  --algo-shadow: 0 30px 80px rgba(0, 0, 0, 0.32);
}

.algo-page {
  position: relative;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(90, 209, 255, 0.18), transparent 30%),
    radial-gradient(circle at 80% 20%, rgba(255, 209, 102, 0.14), transparent 24%),
    linear-gradient(180deg, #081120 0%, #07111f 55%, #0d1b30 100%);
  color: var(--algo-text);
}

.algo-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.algo-orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(14px);
  opacity: 0.45;
}

.orb-a {
  top: 80px;
  left: -80px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(90, 209, 255, 0.45), transparent 70%);
}

.orb-b {
  right: -40px;
  top: 280px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(73, 243, 179, 0.28), transparent 70%);
}

.algo-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.42), transparent 90%);
}

.algo-shell {
  position: relative;
  z-index: 1;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 64px;
}

.algo-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 28px;
  align-items: center;
  padding: 32px 0 24px;
}

.algo-kicker,
.algo-section-head span,
.algo-banner-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--algo-line);
  background: rgba(255, 255, 255, 0.05);
  color: #cbe5ff;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.algo-hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.02;
  color: #f7fbff;
}

.algo-hero p {
  max-width: 680px;
  margin: 0;
  color: var(--algo-muted);
  font-size: 18px;
  line-height: 1.8;
}

.algo-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.algo-primary,
.algo-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  text-decoration: none;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.algo-primary {
  color: #051220;
  font-weight: 700;
  background: linear-gradient(135deg, var(--algo-accent) 0%, var(--algo-accent-2) 100%);
  box-shadow: 0 18px 36px rgba(90, 209, 255, 0.22);
}

.algo-secondary {
  color: var(--algo-text);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
}

.algo-primary:hover,
.algo-secondary:hover {
  transform: translateY(-2px);
}

.algo-stat-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  margin: 30px 0 0;
  list-style: none;
}

.algo-stat-list li,
.algo-code-card,
.algo-mini-card,
.algo-road-card,
.algo-topic-card,
.algo-method-card,
.algo-banner {
  border: 1px solid var(--algo-line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  box-shadow: var(--algo-shadow);
  backdrop-filter: blur(14px);
}

.algo-stat-list li {
  padding: 18px;
  border-radius: 18px;
}

.algo-stat-list strong {
  display: block;
  font-size: 28px;
  color: #ffffff;
}

.algo-stat-list span {
  display: block;
  margin-top: 6px;
  color: var(--algo-muted);
  font-size: 14px;
}

.algo-hero-panel {
  display: grid;
  gap: 18px;
}

.algo-code-card,
.algo-mini-card {
  border-radius: 24px;
}

.algo-code-card {
  overflow: hidden;
}

.algo-code-head {
  display: flex;
  gap: 8px;
  padding: 16px 18px 0;
}

.algo-code-head span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.4);
}

.algo-code-card pre {
  margin: 0;
  padding: 18px 20px 22px;
  color: #daf4ff;
  font-size: 15px;
  line-height: 1.8;
  overflow: auto;
}

.algo-mini-card {
  padding: 20px;
}

.algo-mini-card p {
  margin: 0 0 8px;
  color: var(--algo-muted);
}

.algo-mini-card strong {
  font-size: 22px;
  line-height: 1.45;
}

.algo-section {
  margin-top: 34px;
}

.algo-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.algo-section-head h2,
.algo-banner h2 {
  margin: 14px 0 0;
  padding-top: 0;
  color: #f4f8ff;
  font-size: clamp(28px, 4vw, 40px);
}

.algo-roadmap,
.algo-topic-grid,
.algo-method-grid {
  display: grid;
  gap: 18px;
}

.algo-roadmap {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

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

.algo-road-card,
.algo-topic-card,
.algo-method-card {
  position: relative;
  padding: 24px;
  border-radius: 22px;
}

.algo-road-index {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--algo-accent-2);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.algo-road-card h3,
.algo-topic-card h3,
.algo-method-card h3 {
  margin: 0 0 10px;
  padding-top: 0;
  color: #ffffff;
  font-size: 24px;
}

.algo-road-card p,
.algo-topic-card p,
.algo-method-card p {
  margin: 0;
  color: var(--algo-muted);
  line-height: 1.8;
}

.algo-road-card::after,
.algo-topic-card::after,
.algo-method-card::after {
  content: "";
  position: absolute;
  inset: auto 20px 0 20px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.algo-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px;
  border-radius: 28px;
}

.algo-panel {
  border: 1px solid var(--algo-line);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
  box-shadow: var(--algo-shadow);
  backdrop-filter: blur(14px);
  padding: 24px;
}

.algo-panel-head h3,
.algo-annotation-block h4 {
  margin: 0 0 8px;
  padding-top: 0;
  color: #ffffff;
  font-size: 24px;
}

.algo-panel-head p,
.algo-annotation-block p {
  margin: 0;
  color: var(--algo-muted);
}

.algo-workbench,
.algo-library-grid,
.algo-reader-grid {
  display: grid;
  gap: 18px;
}

.algo-workbench {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.algo-library-grid,
.algo-reader-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.algo-form {
  margin-top: 20px;
}

.algo-form-grid,
.algo-upload-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.algo-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.algo-field span,
.algo-upload-title {
  color: #dff3ff;
  font-size: 14px;
  font-weight: 700;
}

.algo-field input,
.algo-field select,
.algo-field textarea,
.algo-annotation-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  background: rgba(4, 17, 31, 0.62);
  color: var(--algo-text);
  padding: 14px 16px;
  outline: none;
  box-sizing: border-box;
}

.algo-field textarea,
.algo-annotation-form textarea {
  resize: vertical;
  min-height: 110px;
}

.algo-upload-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  background: rgba(4, 17, 31, 0.45);
  padding: 18px;
  cursor: pointer;
}

.algo-upload-card small,
.algo-form-status,
.algo-mini-item span,
.algo-entry-card p,
.algo-code-entry p,
.algo-code-entry small,
.algo-annotation-target,
.algo-empty-state {
  color: var(--algo-muted);
}

.algo-form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.algo-button {
  border: none;
  cursor: pointer;
  font: inherit;
}

.algo-form-status.is-error {
  color: #ffb1a7;
}

.algo-streak-card {
  padding: 20px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(90, 209, 255, 0.16), rgba(73, 243, 179, 0.08));
  border: 1px solid rgba(90, 209, 255, 0.24);
}

.algo-streak-card span {
  display: block;
  color: #d8f4ff;
}

.algo-streak-card strong {
  display: block;
  margin-top: 10px;
  color: #ffffff;
  font-size: 38px;
  line-height: 1.1;
}

.algo-streak-card p {
  margin: 10px 0 0;
  color: var(--algo-muted);
}

.algo-mini-list {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.algo-mini-item {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
}

.algo-mini-item strong {
  display: block;
  margin-top: 8px;
  color: #ffffff;
  font-size: 20px;
}

.algo-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.algo-chip,
.algo-empty-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #dff3ff;
  font-size: 13px;
}

.algo-entry-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.algo-entry-card,
.algo-code-entry {
  width: 100%;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(4, 17, 31, 0.5);
  padding: 18px;
  box-sizing: border-box;
}

.algo-entry-card {
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.algo-entry-card.is-active,
.algo-entry-card:hover {
  transform: translateY(-2px);
  border-color: rgba(90, 209, 255, 0.35);
  background: rgba(10, 31, 54, 0.75);
}

.algo-entry-kind {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(90, 209, 255, 0.12);
  color: #c8efff;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.algo-entry-card strong,
.algo-code-entry strong {
  display: block;
  color: #ffffff;
  font-size: 18px;
}

.algo-entry-card p,
.algo-entry-card small,
.algo-code-entry p {
  margin: 8px 0 0;
}

.algo-code-entry-head {
  display: flex;
  flex-direction: column;
}

.algo-code-entry pre,
.algo-source-line code {
  margin: 14px 0 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.algo-rendered {
  margin-top: 18px;
  min-height: 360px;
}

.algo-rendered h1,
.algo-rendered h2,
.algo-rendered h3 {
  padding-top: 0;
  color: #ffffff;
}

.algo-rendered p,
.algo-rendered li,
.algo-rendered blockquote {
  color: #d6e6f7;
  line-height: 1.8;
}

.algo-rendered a {
  color: var(--algo-accent);
}

.algo-rendered blockquote,
.algo-rendered pre,
.algo-code-entry pre {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(4, 17, 31, 0.72);
  padding: 16px;
  overflow: auto;
}

.algo-rendered code,
.algo-code-entry code,
.algo-source-line code {
  font-family: Consolas, "Courier New", monospace;
}

.algo-annotation-target {
  margin-top: 18px;
}

.algo-annotation-form {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.algo-source-lines {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  max-height: 430px;
  overflow: auto;
}

.algo-source-line {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(4, 17, 31, 0.5);
  color: var(--algo-text);
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
}

.algo-source-line.has-comment {
  border-color: rgba(90, 209, 255, 0.28);
}

.algo-source-line.is-selected {
  border-color: rgba(255, 209, 102, 0.38);
  background: rgba(48, 37, 10, 0.34);
}

.algo-line-no {
  color: #86a9c8;
  font-family: Consolas, "Courier New", monospace;
}

.algo-line-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: 999px;
  background: rgba(90, 209, 255, 0.16);
  color: #d8f4ff;
  font-size: 12px;
}

.algo-annotation-block {
  margin-top: 22px;
}

.algo-annotation-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.algo-annotation-item {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  background: rgba(4, 17, 31, 0.48);
  padding: 16px;
}

.algo-annotation-item strong {
  color: #ffffff;
}

.algo-annotation-item p {
  margin: 8px 0;
  color: #d6e6f7;
  line-height: 1.75;
}

.algo-annotation-item small {
  color: var(--algo-muted);
}

.algo-banner h2 {
  max-width: 720px;
}

.algo-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(6, 12, 22, 0.78);
  backdrop-filter: blur(12px);
}

.algo-footer-inner {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.algo-footer-inner p {
  margin: 0;
  color: var(--algo-muted);
}

.algo-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.algo-footer-links a {
  color: #dff3ff;
  text-decoration: none;
}

@media (max-width: 980px) {
  .algo-hero,
  .algo-roadmap,
  .algo-topic-grid,
  .algo-method-grid,
  .algo-banner,
  .algo-footer-inner,
  .algo-workbench,
  .algo-library-grid,
  .algo-reader-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .algo-footer-inner {
    justify-content: normal;
  }
}

@media (max-width: 820px) {
  .algo-hero {
    grid-template-columns: 1fr;
  }

  .algo-roadmap,
  .algo-topic-grid,
  .algo-method-grid,
  .algo-stat-list,
  .algo-form-grid,
  .algo-upload-grid {
    grid-template-columns: 1fr;
  }

  .algo-shell {
    width: min(100% - 24px, 1160px);
    padding-top: 34px;
  }

  .algo-road-card,
  .algo-topic-card,
  .algo-method-card,
  .algo-banner,
  .algo-code-card,
  .algo-mini-card,
  .algo-panel {
    border-radius: 20px;
  }

  .algo-source-line {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .algo-line-badge {
    grid-column: 2;
    justify-self: start;
    margin-top: 8px;
  }
}