:root {
  --bg: #0f1722;
  --bg-soft: #162130;
  --panel: rgba(14, 24, 37, 0.82);
  --panel-strong: rgba(10, 18, 30, 0.92);
  --line: rgba(118, 213, 193, 0.16);
  --line-strong: rgba(118, 213, 193, 0.32);
  --text: #eff7f3;
  --muted: #a6b8b4;
  --teal: #76d5c1;
  --gold: #f1b24a;
  --gold-soft: rgba(241, 178, 74, 0.14);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(118, 213, 193, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(241, 178, 74, 0.12), transparent 24%),
    linear-gradient(180deg, #172433 0%, #0f1722 52%, #0a1018 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 90%);
}

a {
  color: inherit;
}

img,
svg,
video,
canvas,
iframe {
  max-width: 100%;
}

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

p,
h1,
h2,
h3,
h4,
li,
dt,
dd,
small,
strong,
span,
a,
code {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-shell {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.glow {
  position: absolute;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  filter: blur(20px);
  opacity: 0.5;
  pointer-events: none;
}

.glow-left {
  top: 12px;
  left: -120px;
  background: radial-gradient(circle, rgba(118, 213, 193, 0.3), transparent 68%);
}

.glow-right {
  top: 90px;
  right: -120px;
  background: radial-gradient(circle, rgba(241, 178, 74, 0.22), transparent 68%);
}

.hero,
.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero::before,
.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(118, 213, 193, 0.08), transparent 45%, rgba(241, 178, 74, 0.04));
}

.landing-hero,
.compact-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 32px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.hero-content,
.hero-side,
.panel > * {
  position: relative;
  z-index: 1;
}

.eyebrow,
.side-label {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.74rem;
  color: var(--teal);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}

h2 {
  font-size: 1.4rem;
  margin-bottom: 0;
}

h3 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.hero-copy,
.service-card p,
.page-note,
.topic-summary,
.question-meta,
.answer-list li,
.practice-block li,
.side-note,
.inline-note,
.empty-state {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions,
.cards,
.preview-grid,
.pill-list,
.topic-nav,
.question-sections,
.answer-list,
.practice-block ul {
  display: grid;
  gap: 16px;
}

.hero-actions {
  grid-template-columns: repeat(2, minmax(0, max-content));
  margin-top: 24px;
}

.btn,
.nav-link,
.topic-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 999px;
  text-decoration: none;
  transition: transform 140ms ease, border-color 140ms ease, background-color 140ms ease;
}

.btn:hover,
.nav-link:hover,
.topic-link:hover {
  transform: translateY(-1px);
}

.btn-primary {
  border: 1px solid rgba(118, 213, 193, 0.34);
  background: linear-gradient(135deg, rgba(118, 213, 193, 0.24), rgba(118, 213, 193, 0.1));
  color: var(--text);
  font-weight: 700;
}

.btn-secondary,
.nav-link,
.topic-link {
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.top-nav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 18px;
  position: relative;
  z-index: 3;
}

.language-switch {
  display: inline-flex;
  gap: 8px;
  margin-left: auto;
  position: relative;
  z-index: 5;
  pointer-events: auto;
}

.hero > .language-switch {
  position: absolute;
  top: 24px;
  right: 24px;
}

.language-pill {
  min-height: 40px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.08em;
  position: relative;
  z-index: 6;
  pointer-events: auto;
}

.language-pill.active {
  border-color: rgba(118, 213, 193, 0.42);
  background: rgba(118, 213, 193, 0.12);
  color: var(--teal);
}

.nav-link.active {
  border-color: rgba(118, 213, 193, 0.32);
  background: rgba(118, 213, 193, 0.08);
}

.pill-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
}

.pill-list li {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(118, 213, 193, 0.14);
  background: rgba(255, 255, 255, 0.04);
  text-align: center;
}

.panel {
  padding: 28px;
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
}

.panel h2 {
  margin-bottom: 24px;
}

.cards.two-cols,
.preview-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cards.single-col {
  margin-top: 15px;
  grid-template-columns: 1fr;
}

.service-card,
.preview-card,
.question-card,
.topic-link,
.topic-block {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
}

.service-card,
.preview-card {
  padding: 22px;
}

.page-note {
  margin-bottom: 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.inline-link {
  color: var(--teal);
  text-decoration: none;
}

.code-block {
  margin: 0;
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--panel-strong);
  overflow: auto;
}

.interview-layout {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 24px;
}

.sidebar-panel,
.content-panel {
  align-self: start;
}

.topic-link {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  align-items: flex-start;
  justify-content: flex-start;
  text-align: left;
  width: 100%;
}

.topic-link.active-filter {
  border-color: rgba(118, 213, 193, 0.42);
  background: rgba(118, 213, 193, 0.1);
}

.topic-link strong {
  display: -webkit-box;
  margin-bottom: 8px;
  font-size: 1.02rem;
  line-height: 1.35;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.topic-link small,
.question-meta,
.topic-summary {
  color: var(--muted);
}

.topic-link small {
  display: -webkit-box;
  line-height: 1.55;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.topic-track {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(118, 213, 193, 0.18);
  background: rgba(118, 213, 193, 0.08);
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
  white-space: nowrap;
}

.topic-link-body {
  min-width: 0;
  width: 100%;
}

.question-sections {
  gap: 24px;
}

.question-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(180px, 0.8fr));
  gap: 14px;
  margin-bottom: 22px;
}

.toolbar-field {
  display: grid;
  gap: 8px;
}

.toolbar-field span {
  color: var(--muted);
  font-size: 0.92rem;
}

.toolbar-field input,
.toolbar-field select {
  width: 100%;
  min-height: 46px;
  padding: 10px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  outline: none;
}

.toolbar-field input::placeholder {
  color: rgba(166, 184, 180, 0.8);
}

mark.search-highlight {
  padding: 0 0.14em;
  border-radius: 0.28em;
  background: rgba(241, 178, 74, 0.3);
  color: var(--text);
}

.toolbar-field input:focus,
.toolbar-field select:focus {
  border-color: rgba(118, 213, 193, 0.4);
  box-shadow: 0 0 0 3px rgba(118, 213, 193, 0.08);
}

.topic-block {
  padding: 24px;
}

.topic-header {
  margin-bottom: 20px;
}

.question-card {
  padding: 20px;
  min-width: 0;
}

.question-card + .question-card {
  margin-top: 18px;
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 0.94rem;
}

.meta-pill {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(118, 213, 193, 0.08);
  border: 1px solid rgba(118, 213, 193, 0.16);
  color: var(--text);
}

.answer-list,
.practice-block ul {
  padding-left: 20px;
  margin-bottom: 0;
}

.qa-grid {
  display: grid;
  gap: 14px;
}

.qa-block {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.035);
}

.qa-block h4 {
  margin: 0 0 10px;
  color: var(--text);
}

.qa-block p {
  margin: 0;
  color: var(--text);
  line-height: 1.7;
}

.qa-block .answer-list {
  margin-top: 0;
}

.qa-block-primary {
  border-color: rgba(118, 213, 193, 0.2);
  background: rgba(118, 213, 193, 0.08);
}

.qa-block-warm {
  border-color: rgba(241, 178, 74, 0.18);
  background: rgba(241, 178, 74, 0.08);
}

.code-sample {
  margin: 16px 0 0;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.08);
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.practice-block {
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--gold-soft);
  border: 1px solid rgba(241, 178, 74, 0.18);
}

.practice-block h4 {
  margin: 0 0 10px;
  color: var(--gold);
}

.roadmap-intro-grid,
.roadmap-basics,
.knowledge-tree,
.technology-map,
.integration-flow,
.quiz-bundles,
.roadmap-phase-list,
.roadmap-pitfalls,
.practice-matrix {
  display: grid;
  gap: 18px;
}

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

.roadmap-basics {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.knowledge-tree {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.technology-map {
  grid-template-columns: 1fr;
}

.integration-flow,
.quiz-bundles,
.roadmap-pitfalls {
  grid-template-columns: 1fr;
}

.tree-branch,
.basic-card,
.technology-card,
.integration-card,
.quiz-bundle-card,
.quiz-question-card,
.quiz-result-card,
.pitfall-card,
.phase-card,
.practice-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
}

.tree-branch {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  padding: 22px;
  align-items: start;
}

.tree-icon {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border-radius: 24px;
  font-size: 2rem;
  background: rgba(118, 213, 193, 0.08);
  border: 1px solid rgba(118, 213, 193, 0.16);
}

.tree-body h3,
.phase-card h3,
.practice-card h3 {
  margin-bottom: 10px;
}

.tree-body p,
.phase-summary,
.practice-card p {
  color: var(--muted);
  line-height: 1.65;
}

.tree-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.tree-chip,
.phase-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(118, 213, 193, 0.08);
  border: 1px solid rgba(118, 213, 193, 0.16);
}

.phase-card,
.practice-card {
  padding: 22px;
}

.basic-card {
  padding: 22px;
}

.technology-card {
  padding: 22px;
}

.integration-card,
.pitfall-card {
  padding: 22px;
}

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

.quiz-bundle-card,
.quiz-question-card,
.quiz-result-card {
  padding: 22px;
}

.quiz-bundle-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025)),
    rgba(16, 27, 40, 0.92);
  border: 1px solid rgba(118, 213, 193, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.quiz-bundle-card.active {
  border-color: rgba(118, 213, 193, 0.46);
  background:
    linear-gradient(180deg, rgba(118, 213, 193, 0.14), rgba(255, 255, 255, 0.03)),
    rgba(16, 32, 41, 0.96);
  box-shadow:
    0 16px 38px rgba(0, 0, 0, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.quiz-bundle-meta,
.quiz-summary-grid,
.quiz-actions {
  display: grid;
  gap: 12px;
}

.quiz-bundle-meta {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 16px 0;
}

.quiz-bundle-meta span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 6px 10px;
  border-radius: 14px;
  background: rgba(240, 248, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #d8e5e1;
  text-align: center;
}

.quiz-workspace {
  display: grid;
  gap: 18px;
}

.quiz-summary-card {
  position: sticky;
  top: 16px;
  z-index: 2;
  padding: 20px;
  border-radius: 22px;
  border: 1px solid rgba(118, 213, 193, 0.22);
  background:
    radial-gradient(circle at top right, rgba(118, 213, 193, 0.12), transparent 28%),
    linear-gradient(180deg, rgba(18, 30, 44, 0.98), rgba(12, 20, 32, 0.98));
  backdrop-filter: blur(12px);
  box-shadow: 0 22px 44px rgba(0, 0, 0, 0.24);
}

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

.quiz-summary-grid article {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.quiz-summary-grid span {
  color: #a9bab6;
}

.quiz-summary-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 1.15rem;
  color: #f4fbf8;
}

.quiz-action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.quiz-question-card h3 {
  margin-bottom: 16px;
}

.quiz-question-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02)),
    rgba(15, 26, 37, 0.92);
  border: 1px solid rgba(118, 213, 193, 0.16);
}

.quiz-options {
  display: grid;
  gap: 10px;
}

.quiz-option {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  background: rgba(240, 248, 255, 0.05);
  cursor: pointer;
  transition: border-color 140ms ease, background-color 140ms ease, transform 140ms ease;
}

.quiz-option:hover {
  border-color: rgba(118, 213, 193, 0.26);
  background: rgba(118, 213, 193, 0.08);
  transform: translateY(-1px);
}

.quiz-option:has(input:checked) {
  border-color: rgba(241, 178, 74, 0.42);
  background: rgba(241, 178, 74, 0.1);
}

.quiz-option.correct {
  border-color: rgba(118, 213, 193, 0.42);
  background: rgba(118, 213, 193, 0.14);
}

.quiz-option.incorrect {
  border-color: rgba(255, 125, 107, 0.4);
  background: rgba(255, 125, 107, 0.12);
}

.quiz-option input {
  margin-top: 2px;
  accent-color: #f1b24a;
}

.quiz-result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.quiz-result-grid article {
  padding: 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.09);
}

.quiz-result-card {
  background:
    linear-gradient(180deg, rgba(118, 213, 193, 0.08), rgba(255, 255, 255, 0.02)),
    rgba(14, 28, 37, 0.95);
  border: 1px solid rgba(118, 213, 193, 0.18);
}

body[data-page="quiz"] .service-card p,
body[data-page="quiz"] .technology-summary,
body[data-page="quiz"] .phase-summary,
body[data-page="quiz"] .practice-card p,
body[data-page="quiz"] .empty-state,
body[data-page="quiz"] .quiz-bundle-card p,
body[data-page="quiz"] .quiz-summary-card p,
body[data-page="quiz"] .quiz-question-card p,
body[data-page="quiz"] .quiz-result-card p {
  color: #c8d7d4;
}

body[data-page="quiz"] .panel {
  background:
    radial-gradient(circle at top left, rgba(118, 213, 193, 0.06), transparent 24%),
    linear-gradient(180deg, rgba(18, 31, 44, 0.95), rgba(12, 21, 31, 0.95));
}

body[data-page="quiz"] .btn-primary {
  color: #081217;
  background: linear-gradient(135deg, #7be0cc, #9be7d8);
  border-color: rgba(123, 224, 204, 0.52);
}

body[data-page="quiz"] .btn-secondary {
  color: #eef8f5;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.basic-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.basic-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  min-height: 42px;
  padding: 8px;
  border-radius: 14px;
  font-weight: 700;
  background: rgba(118, 213, 193, 0.1);
  border: 1px solid rgba(118, 213, 193, 0.16);
}

.technology-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.technology-summary {
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 16px;
}

.technology-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.integration-card {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.integration-index {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  font-weight: 700;
  font-size: 1.1rem;
  background: rgba(118, 213, 193, 0.1);
  border: 1px solid rgba(118, 213, 193, 0.16);
}

.integration-body p,
.pitfall-card p {
  color: var(--muted);
  line-height: 1.65;
}

.technology-block {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.technology-block h4 {
  margin: 0 0 10px;
  color: var(--gold);
}

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

.phase-subgrid,
.practice-matrix {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.phase-block {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.phase-block h4 {
  margin: 0 0 10px;
  color: var(--gold);
}

.phase-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.65;
}

.roadmap-visual {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  position: relative;
}

.visual-step-card {
  position: relative;
  padding: 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  min-height: 100%;
}

.visual-step-card::after {
  content: "";
  position: absolute;
  top: 34px;
  right: -18px;
  width: 18px;
  height: 2px;
  background: linear-gradient(90deg, rgba(118, 213, 193, 0.7), rgba(241, 178, 74, 0.65));
}

.visual-step-card:last-child::after {
  display: none;
}

.visual-step-index {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  border-radius: 999px;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(118, 213, 193, 0.2), rgba(241, 178, 74, 0.16));
  border: 1px solid rgba(118, 213, 193, 0.2);
}

.visual-step-body p {
  color: var(--muted);
  line-height: 1.6;
}

.stats-card .stat-list {
  margin: 0;
}

.sidebar-panel,
.content-panel,
.topic-nav,
.topic-block,
.topic-header,
.question-sections {
  min-width: 0;
}

.stat-list div + div {
  margin-top: 14px;
}

.stat-list dt {
  color: var(--muted);
  margin-bottom: 6px;
}

.stat-list dd {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.empty-state {
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(255, 255, 255, 0.12);
}

@media (max-width: 980px) {
  .landing-hero,
  .compact-hero,
  .interview-layout,
  .cards.two-cols,
  .preview-grid,
  .roadmap-intro-grid,
  .roadmap-basics,
  .knowledge-tree,
  .technology-grid,
  .integration-card,
  .question-toolbar,
  .quiz-bundles,
  .quiz-summary-grid,
  .quiz-result-grid,
  .phase-subgrid,
  .practice-matrix,
  .roadmap-visual {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    grid-template-columns: 1fr;
  }

  .pill-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-link {
    grid-template-columns: 1fr;
  }

  .tree-branch {
    grid-template-columns: 1fr;
  }

  .integration-card {
    grid-template-columns: 1fr;
  }

  .visual-step-card::after {
    display: none;
  }
}

@media (max-width: 640px) {
  .page-shell {
    padding: 18px 14px 40px;
  }

  .landing-hero,
  .compact-hero,
  .panel {
    padding: 22px;
  }

  .pill-list,
  .cards.two-cols,
  .preview-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.3rem;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
  }
}