:root {
  --bg: #07131d;
  --bg-2: #0d1d2b;
  --panel: rgba(13, 29, 43, 0.78);
  --panel-strong: rgba(9, 20, 30, 0.92);
  --line: rgba(92, 140, 173, 0.35);
  --line-strong: rgba(122, 183, 212, 0.55);
  --text: #eaf5fb;
  --muted: #99b3c7;
  --accent: #1fc8a6;
  --accent-strong: #13a88a;
  --sand: #f6b443;
  --danger: #f17452;
  --goal: #77df83;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at 10% 15%, rgba(35, 88, 124, 0.45), transparent 28%),
    radial-gradient(circle at 88% 8%, rgba(31, 200, 166, 0.16), transparent 20%),
    linear-gradient(180deg, #08131d 0%, #091621 45%, #071019 100%);
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

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

.page-noise {
  opacity: 0.18;
  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: 24px 24px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 100%);
}

.orb-a {
  background: radial-gradient(circle at 18% 24%, rgba(31, 200, 166, 0.12), transparent 28%);
}

.orb-b {
  background: radial-gradient(circle at 82% 12%, rgba(246, 180, 67, 0.08), transparent 20%);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1240px, calc(100vw - 28px));
  margin: 14px auto 0;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(7, 17, 26, 0.82);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 1rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), #66f4d6);
  box-shadow: 0 0 18px rgba(31, 200, 166, 0.45);
}

.nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
}

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

.nav a:hover {
  color: var(--text);
}

.topbar-cta {
  white-space: nowrap;
}

main {
  width: min(1240px, calc(100vw - 28px));
  margin: 28px auto 40px;
  display: grid;
  gap: 24px;
}

.glass-panel,
.glass-subpanel {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(16, 33, 47, 0.84), rgba(8, 18, 28, 0.88));
  box-shadow: var(--shadow);
}

.glass-panel {
  padding: 28px;
}

.glass-subpanel {
  padding: 20px;
  background: linear-gradient(180deg, rgba(11, 24, 35, 0.88), rgba(7, 16, 25, 0.92));
}

.hero-grid,
.feature-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 24px;
}

.hero-copy-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 560px;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--accent);
  letter-spacing: 0.14em;
  font-size: 0.82rem;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 4.8vw, 4.8rem);
  line-height: 0.98;
  max-width: 10ch;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  line-height: 1.05;
  margin-bottom: 0.8rem;
}

.lead,
.section-copy p,
.value-card p,
.mission-panel p,
.exercise-card p,
.community-card li,
.tips-box p {
  color: var(--muted);
  line-height: 1.6;
}

.hero-actions,
.controls,
.command-chips,
.meta-pills,
.status-grid,
.legend,
.hero-metrics,
.check-grid,
.mission-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.72rem 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: transparent;
  color: var(--text);
  text-decoration: none;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.btn:hover,
.command-chip:hover {
  transform: translateY(-1px);
}

.btn-primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent), #66f4d6);
  color: #072016;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-strong), #52efcf);
}

.btn-ghost:hover {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
}

.hero-metrics {
  margin-top: 28px;
}

.hero-metrics article,
.value-card,
.exercise-card {
  position: relative;
  overflow: hidden;
}

.hero-metrics article {
  min-width: 140px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.hero-metrics strong {
  display: block;
  font-size: 1.9rem;
  color: var(--sand);
}

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

.hero-visual,
.image-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 560px;
}

.three-up {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.value-card {
  min-height: 220px;
}

.value-card::after,
.exercise-card::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 200, 166, 0.16), transparent 70%);
}

.pill,
.panel-tag,
.meta-pill,
.state-chip,
.muted-chip,
.command-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

.pill,
.panel-tag,
.meta-pill,
.muted-chip,
.command-chip {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.pill,
.panel-tag {
  color: var(--accent);
}

.muted-chip.success {
  border-color: rgba(119, 223, 131, 0.45);
  background: rgba(119, 223, 131, 0.16);
  color: #e2ffe7;
}

.muted-chip.error {
  border-color: rgba(241, 116, 82, 0.45);
  background: rgba(241, 116, 82, 0.16);
  color: #ffd8ce;
}

.muted-chip.neutral {
  color: var(--muted);
}

.feature-grid.reverse-grid {
  grid-template-columns: 0.92fr 1.08fr;
}

.section-copy,
.community-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.level-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.level-list article,
.tips-box,
.mission-stats div,
.program-box,
.community-card,
.mission-panel,
.code-panel,
.world-panel {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.level-list article {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
}

.level-list strong {
  color: var(--sand);
}

.level-list span,
.mission-stats span,
.mission-stats strong,
.legend span,
.status-grid span,
.community-list li {
  display: block;
}

.check-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.check-grid div {
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.lab-shell {
  padding-bottom: 24px;
}

.section-heading,
.panel-topline,
.compact-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.section-heading {
  margin-bottom: 20px;
}

.lab-layout-pro {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr 1fr;
  gap: 18px;
}

.mission-panel,
.world-panel,
.code-panel {
  height: 100%;
}

.mission-select-label,
.speed-box label {
  display: block;
  margin: 18px 0 8px;
  color: var(--muted);
  font-size: 0.92rem;
}

.mission-select,
.speed-box input {
  width: 100%;
}

.mission-select {
  min-height: 48px;
  padding: 0.75rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #07111a;
  color: var(--text);
  font-family: inherit;
}

.mission-panel h3,
.community-card h3 {
  font-size: 1.4rem;
}

.mission-stats {
  margin: 20px 0;
}

.mission-stats div {
  flex: 1;
  min-width: 120px;
  padding: 14px;
}

.mission-stats span {
  color: var(--muted);
  font-size: 0.88rem;
}

.mission-stats strong {
  margin-top: 6px;
  font-size: 1.1rem;
}

.objective-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.objective-list li {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
}

.objective-list li.done {
  border-color: rgba(119, 223, 131, 0.5);
  background: rgba(119, 223, 131, 0.12);
  color: var(--text);
}

.tips-box {
  margin-top: 18px;
  padding: 16px;
}

.syntax-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.syntax-box pre {
  margin: 0;
  color: #c8fee9;
  font-family: "JetBrains Mono", monospace;
  white-space: pre-wrap;
  line-height: 1.55;
}

.lesson-box,
.judge-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.lesson-checklist,
.history-list {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.lesson-checklist li {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.18);
  color: var(--muted);
}

.lesson-example {
  margin: 14px 0 0;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #07111a;
  color: #c8fee9;
  white-space: pre-wrap;
  font-family: "JetBrains Mono", monospace;
}

.world-panel canvas {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  margin: 16px auto 0;
  border-radius: 18px;
  border: 1px solid #dbe7ee;
  background: #eff5f8;
}

.legend {
  margin-top: 14px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

.legend i {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  display: inline-block;
}

.legend-goal {
  background: var(--goal);
}

.legend-wall {
  background: #395369;
}

.legend-beeper {
  border-radius: 50%;
  background: #d57a2e;
}

.legend-robot {
  background: var(--accent);
}

.status-grid {
  margin-top: 14px;
}

.status-grid span,
.community-list li {
  min-width: 120px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
}

.state-chip.neutral {
  border: 1px solid var(--line);
  color: var(--muted);
}

.state-chip.success {
  border: 1px solid rgba(119, 223, 131, 0.45);
  background: rgba(119, 223, 131, 0.16);
  color: #dfffe3;
}

.state-chip.error {
  border: 1px solid rgba(241, 116, 82, 0.45);
  background: rgba(241, 116, 82, 0.16);
  color: #ffd8ce;
}

.editor-label {
  display: block;
  margin: 14px 0 8px;
  color: var(--muted);
}

textarea {
  width: 100%;
  min-height: 210px;
  margin: 0;
  padding: 16px;
  resize: vertical;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #07111a;
  color: #c8fee9;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
}

.command-chip {
  font-family: "JetBrains Mono", monospace;
  color: var(--text);
  cursor: pointer;
}

.command-chips {
  margin: 14px 0 16px;
}

.speed-box {
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.speed-box label {
  margin-top: 0;
}

.speed-box input {
  accent-color: var(--accent);
}

.speed-box span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.program-box {
  margin-top: 18px;
  padding: 16px;
}

.program-list {
  margin: 14px 0 0;
  padding-left: 1.4rem;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
}

.program-list li {
  padding: 4px 0;
}

.program-list li.active {
  color: var(--accent);
}

.program-list li.error {
  color: #ffb8a9;
}

.log {
  min-height: 88px;
  margin: 18px 0 0;
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: 18px;
  background: #07111a;
  color: #ffd8ba;
  white-space: pre-wrap;
  font-family: "JetBrains Mono", monospace;
}

.console-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.history-list li {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.18);
  color: var(--muted);
  font-size: 0.92rem;
}

.history-list li.error {
  border-color: rgba(241, 116, 82, 0.42);
  color: #ffd8ce;
}

.history-list li.success {
  border-color: rgba(119, 223, 131, 0.42);
  color: #e2ffe7;
}

.judge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.judge-grid article {
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.18);
}

.judge-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
}

.judge-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 1.4rem;
}

.judge-diagnosis {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.exercise-section {
  display: grid;
  gap: 20px;
}

.rich-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.exercise-card {
  min-height: 220px;
}

.mexico-grid {
  grid-template-columns: 1.08fr 0.92fr;
}

.community-card {
  padding: 28px;
}

.community-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer {
  padding: 0 0 36px;
  text-align: center;
  color: var(--muted);
}

.study-tools {
  display: flex;
  gap: 10px;
  margin: 14px 0;
  align-items: center;
}

.study-tools > div {
  flex: 1;
}

.lesson-nav {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}

.nav-btn {
  flex: 1;
  font-size: 0.85rem;
  padding: 0.5rem 0.6rem;
}

.debug-prompt {
  margin-top: 12px;
  padding: 10px;
  border-radius: 10px;
  background: rgba(246, 180, 67, 0.12);
  border: 1px solid rgba(246, 180, 67, 0.35);
  color: #ffd9a8;
  font-size: 0.9rem;
}

.study-dashboard {
  padding: 24px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.dashboard-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.dashboard-card span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.dashboard-card strong {
  display: block;
  font-size: 2rem;
  margin: 8px 0;
}

.dashboard-card p {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.dashboard-card-accent {
  border-color: rgba(31, 200, 166, 0.35);
  background: rgba(31, 200, 166, 0.08);
}

.mission-progress-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.mission-progress-item {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mission-progress-item.completed {
  border-color: rgba(119, 223, 131, 0.4);
  background: rgba(119, 223, 131, 0.1);
}

.mission-progress-item strong {
  font-size: 1rem;
}

@media (max-width: 1100px) {
  .hero-grid,
  .feature-grid,
  .feature-grid.reverse-grid,
  .mexico-grid,
  .lab-layout-pro,
  .three-up,
  .rich-list {
    grid-template-columns: 1fr;
  }

  .hero-copy-panel,
  .hero-visual,
  .image-panel {
    min-height: auto;
  }
}

@media (max-width: 760px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .nav,
  .hero-actions,
  .section-heading,
  .panel-topline,
  .compact-topline {
    flex-direction: column;
    align-items: flex-start;
  }

  main {
    width: min(100vw - 18px, 1240px);
    margin-top: 18px;
  }

  .glass-panel {
    padding: 20px;
  }

  h1 {
    max-width: none;
  }

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

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