:root {
  color-scheme: light;
  --bg: #f4f7fc;
  --bg-elev: #ffffff;
  --bg-soft: #eaf0f9;
  --text: #0b1526;
  --muted: #5a6b84;
  --line: #d7e1f0;
  --accent: #0066ff;
  --accent-text: #0052cc;
  --cyan: #00a6c4;
  --accent-soft: rgba(0, 102, 255, 0.16);
  --glow-a: rgba(0, 102, 255, 0.14);
  --glow-b: rgba(0, 166, 196, 0.12);
  --shadow: 0 18px 50px rgba(15, 35, 70, 0.1);
  --shadow-sm: 0 8px 24px rgba(15, 35, 70, 0.07);
  --card-media: #f3f8ff;
  --header: rgba(244, 247, 252, 0.94);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1240px;
  --lvl-1: #22a06b;
  --lvl-2: #3b82f6;
  --lvl-3: #d97706;
  --lvl-4: #ea580c;
  --lvl-5: #dc2626;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #070b12;
  --bg-elev: #0c1421;
  --bg-soft: #101b2b;
  --text: #e8eefb;
  --muted: #93a4bd;
  --line: #1d2b40;
  --accent: #5b9dff;
  --accent-text: #8bb8ff;
  --cyan: #22d3ee;
  --accent-soft: rgba(91, 157, 255, 0.2);
  --glow-a: rgba(91, 157, 255, 0.2);
  --glow-b: rgba(34, 211, 238, 0.14);
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 10px 26px rgba(0, 0, 0, 0.35);
  --card-media: #f3f8ff;
  --header: rgba(7, 11, 18, 0.9);
  --lvl-1: #4ade80;
  --lvl-2: #60a5fa;
  --lvl-3: #fbbf24;
  --lvl-4: #fb923c;
  --lvl-5: #f87171;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

svg {
  display: block;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  display: block;
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  object-fit: cover;
  box-shadow: 0 6px 18px var(--accent-soft);
}

.hero-logo {
  display: block;
  width: 56px;
  height: 56px;
  margin-bottom: 22px;
  border-radius: 14px;
  box-shadow: 0 12px 30px var(--accent-soft);
}

.brand-dot {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13.5px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.18s ease, background 0.18s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: var(--bg-soft);
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-button {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elev);
  color: var(--muted);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.icon-button:hover,
.icon-button:focus-visible {
  border-color: var(--accent);
  color: var(--accent-text);
}

.icon-button svg {
  width: 17px;
  height: 17px;
}

.theme-toggle .moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon {
  display: block;
}

.github-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elev);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.github-button:hover,
.github-button:focus-visible {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.github-button svg {
  width: 16px;
  height: 16px;
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero::before,
.hero::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.hero::before {
  inset: -30% -10% auto;
  height: 560px;
  background:
    radial-gradient(520px 280px at 18% 30%, var(--glow-a), transparent 70%),
    radial-gradient(480px 260px at 82% 18%, var(--glow-b), transparent 70%);
}

.hero::after {
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.32;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 20%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 20%, #000 20%, transparent 75%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 56px;
  align-items: center;
  padding: 82px 0 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--accent-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  content: "";
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(2.5rem, 5.4vw, 4.6rem);
  font-weight: 850;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.hero h1 span {
  background: linear-gradient(120deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lede {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button svg {
  width: 15px;
  height: 15px;
}

.button-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 28px var(--accent-soft);
}

.button-primary:hover,
.button-primary:focus-visible {
  background: var(--accent-text);
}

.button-secondary {
  border-color: var(--line);
  background: var(--bg-elev);
  color: var(--text);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: var(--accent);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.stat strong {
  display: block;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.stat span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.terminal {
  overflow: hidden;
  border: 1px solid #1d3550;
  border-radius: 16px;
  background: #08111f;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.34);
  transform: rotate(0.6deg);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 14px;
  border-bottom: 1px solid #16283d;
  background: #0b1727;
}

.terminal-bar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #2a3e57;
}

.terminal-bar i:nth-child(1) {
  background: #ff5f57;
}

.terminal-bar i:nth-child(2) {
  background: #febc2e;
}

.terminal-bar i:nth-child(3) {
  background: #28c840;
}

.terminal-bar span {
  margin-left: 7px;
  color: #6f86a3;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
}

.terminal pre {
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  color: #c7d7ec;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.85;
}

.terminal .prompt {
  color: #22d3ee;
}

.terminal .out {
  color: #9dbdff;
}

.terminal .good {
  color: #4ade80;
}

.terminal .dim {
  color: #8095b0;
}

.section {
  padding: 72px 0;
  scroll-margin-top: 84px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.section-kicker {
  margin: 0 0 8px;
  color: var(--accent-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.section-head p {
  max-width: 460px;
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.search {
  position: relative;
  flex: 1 1 280px;
  max-width: 390px;
}

.search svg {
  position: absolute;
  top: 50%;
  left: 14px;
  width: 16px;
  height: 16px;
  color: var(--muted);
  transform: translateY(-50%);
  pointer-events: none;
}

.search input {
  width: 100%;
  height: 46px;
  padding: 0 64px 0 40px;
  border: 1px solid var(--line);
  border-radius: 11px;
  outline: none;
  background: var(--bg-elev);
  color: var(--text);
  font-size: 14px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.search input::placeholder {
  color: var(--muted);
}

.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.search kbd {
  position: absolute;
  top: 50%;
  right: 11px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--bg-soft);
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  transform: translateY(-50%);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.filter {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--bg-elev);
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 650;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.filter:hover,
.filter:focus-visible {
  border-color: var(--accent);
  color: var(--text);
}

.filter[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.filter span {
  opacity: 0.7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
}

.results-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
  gap: 18px;
}

.card {
  min-width: 0;
}

.card > a {
  display: flex;
  height: 100%;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  color: inherit;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.card > a:hover,
.card > a:focus-visible {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.card > a:focus-visible {
  outline: 3px solid var(--accent-soft);
  outline-offset: 2px;
}

.card-media {
  display: grid;
  aspect-ratio: 2 / 1;
  place-items: center;
  overflow: hidden;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  background: var(--card-media);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.card > a:hover .card-media img {
  transform: scale(1.025);
}

.card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 15px 16px 16px;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 7px;
  border-radius: 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.tag-risk {
  background: rgba(59, 130, 246, 0.12);
  color: #2563eb;
}

.tag-puzzle {
  background: rgba(139, 92, 246, 0.12);
  color: #7c3aed;
}

.tag-text {
  background: rgba(217, 119, 6, 0.12);
  color: #b45309;
}

.tag-open {
  background: rgba(34, 160, 107, 0.13);
  color: #15803d;
}

[data-theme="dark"] .tag-risk {
  color: #93c5fd;
}

[data-theme="dark"] .tag-puzzle {
  color: #c4b5fd;
}

[data-theme="dark"] .tag-text {
  color: #fcd34d;
}

[data-theme="dark"] .tag-open {
  color: #86efac;
}

.level {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-transform: uppercase;
}

.level::before {
  width: 38px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(
    to right,
    var(--level-color) 0 var(--fill),
    var(--line) var(--fill) 100%
  );
  content: "";
}

.level[data-level="1"] {
  --fill: 20%;
  --level-color: var(--lvl-1);
}

.level[data-level="2"] {
  --fill: 40%;
  --level-color: var(--lvl-2);
}

.level[data-level="3"] {
  --fill: 60%;
  --level-color: var(--lvl-3);
}

.level[data-level="4"] {
  --fill: 80%;
  --level-color: var(--lvl-4);
}

.level[data-level="5"] {
  --fill: 100%;
  --level-color: var(--lvl-5);
}

.card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 750;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.card p {
  margin: 7px 0 14px;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
}

.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  color: var(--accent-text);
  font-size: 11.5px;
  font-weight: 700;
}

.card-cta svg {
  width: 13px;
  height: 13px;
  transition: transform 0.18s ease;
}

.card > a:hover .card-cta svg {
  transform: translateX(3px);
}

.card[hidden] {
  display: none;
}

.empty {
  padding: 48px 24px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.empty strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
}

.empty .button {
  margin-top: 16px;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  padding: 0 0 76px;
}

.principle {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
}

.principle span {
  display: block;
  margin-bottom: 12px;
  color: var(--accent-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.principle h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.principle p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.work-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.work-step {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
}

.work-step > span {
  display: block;
  margin-bottom: 12px;
  color: var(--accent-text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.work-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.work-step p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.difficulty-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.difficulty-legend > strong {
  margin-right: auto;
  font-size: 13px;
}

.difficulty-legend .level {
  font-size: 9px;
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 0 64px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(120deg, var(--bg-soft), var(--bg-elev));
}

.cta-band-main {
  display: flex;
  align-items: center;
  gap: 20px;
}

.cta-band-logo {
  width: 72px;
  height: 72px;
  flex: 0 0 auto;
  border-radius: 18px;
  box-shadow: 0 12px 30px var(--accent-soft);
}

.cta-band h2 {
  margin: 0 0 6px;
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  letter-spacing: -0.04em;
}

.cta-band p {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  padding: 36px 0;
}

.footer-brand {
  max-width: 420px;
}

.footer-brand p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.65;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 12.5px;
  font-weight: 650;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent-text);
}

.footer-note {
  margin: 0;
  padding: 0 0 28px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.04em;
}

@media (max-width: 980px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 66px 0 58px;
  }

  .terminal {
    max-width: 560px;
    transform: none;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .principles {
    grid-template-columns: 1fr;
  }

  .work-steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .nav-links {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

  .hero-stats {
    gap: 22px;
  }

  .toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .search {
    width: 100%;
    max-width: none;
    flex: 0 0 auto;
  }

  .search input {
    font-size: 16px;
  }

  .filters {
    width: 100%;
    min-width: 0;
    overflow-x: auto;
    padding-bottom: 4px;
    flex-wrap: nowrap;
    scrollbar-width: thin;
  }

  .filter {
    flex: 0 0 auto;
  }
}

@media (max-width: 560px) {
  .wrap {
    width: min(var(--max), calc(100% - 32px));
  }

  .hero-inner {
    padding-top: 50px;
  }

  .hero-lede {
    font-size: 15.5px;
  }

  .github-button span {
    display: none;
  }

  .github-button {
    width: 38px;
    padding: 0;
    justify-content: center;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
    gap: 12px;
  }

  .card-body {
    padding: 12px;
  }

  .card-top {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .card h3 {
    font-size: 14.5px;
  }

  .card p {
    margin: 6px 0 10px;
    font-size: 11.5px;
    line-height: 1.5;
  }

  .card-cta {
    font-size: 11px;
  }

  .level {
    gap: 5px;
    font-size: 8px;
  }

  .level::before {
    width: 28px;
  }

  .section {
    padding: 56px 0;
  }

  .principles {
    padding-bottom: 56px;
  }

  .difficulty-legend {
    align-items: flex-start;
    gap: 12px;
  }

  .difficulty-legend > strong {
    width: 100%;
  }

  .cta-band,
  .cta-band-main {
    align-items: flex-start;
    flex-direction: column;
  }

  .cta-band {
    margin-bottom: 48px;
    padding: 20px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

.notfound {
  display: grid;
  min-height: calc(100vh - 140px);
  place-items: center;
  padding: 72px 0;
  text-align: center;
}

.notfound .code {
  margin: 0;
  background: linear-gradient(120deg, var(--accent), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(3.5rem, 14vw, 7rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.notfound h1 {
  margin: 12px 0 10px;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.notfound p {
  max-width: 440px;
  margin: 0 auto 24px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.65;
}