:root {
  --bg: #0c0d0f;
  --panel: #111214;
  --panel-2: #15171a;
  --panel-3: #191c20;
  --text: #e5e5e5;
  --text-dim: #9aa3b2;
  --text-soft: #6b7280;
  --border: #2a2a2a;
  --line: #1e1e1e;
  --accent: #c7d2fe;
  --accent-2: #e0e7ff;
  --good: #34d399;
  --radius: 0.35rem;
  --radius-sm: 0.3rem;
  --max-width: 1100px;
  --sans: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  scrollbar-gutter: stable both-edges;
  overflow-y: scroll;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.45;
  overflow-x: hidden;
  padding-bottom: 4.1rem;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-2);
}

button,
input,
select {
  font: inherit;
}

button,
input,
select,
a {
  transition:
    border-color 0.15s ease,
    background 0.15s ease,
    color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.15s ease;
}

:focus-visible {
  outline: 2px solid rgba(199, 210, 254, 0.52);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 10px;
  padding: 0.5rem 0.7rem;
  border-radius: 0.3rem;
  border: 2px solid var(--border);
  background: var(--panel);
  color: var(--text);
  transform: translateY(-140%);
  z-index: 20000;
}

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

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 18px 54px;
}

.site-header {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding-top: 3.2rem;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10001;
  background: linear-gradient(180deg, rgba(12, 13, 15, 0.96), rgba(12, 13, 15, 0.9));
  backdrop-filter: saturate(120%) blur(6px);
  border-bottom: 2px solid var(--line);
}

.topbar-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.ecosystem-nav {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.ecosystem-nav a,
.ecosystem-nav .active {
  font-family: var(--mono);
  font-size: 0.9rem;
  line-height: 1;
  padding: 0.35rem 0.45rem;
  border-radius: 0.2rem;
}

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

.ecosystem-nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.ecosystem-nav .active {
  color: #9ae6b4;
  background: rgba(72, 187, 120, 0.16);
  border: 2px solid rgba(72, 187, 120, 0.35);
}

.brand {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  text-decoration: none;
}

.brand:hover {
  color: var(--accent-2);
}

.container {
  margin-top: 14px;
  display: grid;
  gap: 12px;
}

.card {
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 1rem 1.1rem;
}

.hero-card,
.learning-card,
.subject-card,
.resource-card,
.filter-bar,
.about-panel,
.subject-overview-card,
.official-info-card {
  box-shadow: none;
}

.hero-card {
  padding: 1.1rem 1.2rem;
  background: linear-gradient(145deg, #111214 0%, #171a1f 55%, #111214 100%);
}

.hero-eyebrow,
.plan-kicker,
.subject-overview-duration,
.resource-provider {
  margin: 0 0 0.3rem;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-size: clamp(1.6rem, 4.2vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 13ch;
}

.hero-subtitle {
  margin: 0.65rem 0 0;
  max-width: 60ch;
  color: var(--text-dim);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.95rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 6px;
  border: 2px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  user-select: none;
}

.btn:hover,
.btn:focus-visible {
  border-color: rgba(199, 210, 254, 0.35);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  border-color: rgba(199, 210, 254, 0.55);
  background: linear-gradient(180deg, rgba(199, 210, 254, 0.24), rgba(199, 210, 254, 0.12));
}

.btn-primary:hover,
.btn-primary:focus-visible {
  border-color: rgba(199, 210, 254, 0.8);
  background: linear-gradient(180deg, rgba(199, 210, 254, 0.28), rgba(199, 210, 254, 0.14));
}

.btn-secondary,
.btn-ghost {
  color: var(--text-dim);
}

.trust-box {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 2px solid color-mix(in srgb, var(--accent-2) 24%, var(--border));
  background: rgba(255, 255, 255, 0.02);
}

.trust-title {
  margin: 0;
  font-size: 1rem;
}

.trust-list {
  margin: 0.7rem 0 0;
  padding-left: 1.15rem;
  color: var(--text-dim);
}

.section-head,
.browser-head,
.group-head,
.learning-card-head,
.plan-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.85rem;
}

.section-title,
.learning-card-title,
.group-title,
.plan-title,
.subject-card-title,
.official-info-title,
.subject-overview-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.24;
}

.section-copy,
.browser-copy,
.group-copy,
.learning-card-copy,
.official-info-copy,
.subject-card-copy,
.plan-description,
.plan-audience,
.subject-overview-copy,
.subject-overview-format {
  margin: 0.45rem 0 0;
  color: var(--text-dim);
}

.learning-grid,
.subjects-grid,
.plans-grid,
.subject-overview-grid,
.official-info-grid {
  display: grid;
  gap: 1rem;
}

.learning-card,
.subject-card {
  padding: 1rem 1.05rem;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--panel);
}

.learning-card-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  border: 2px solid color-mix(in srgb, var(--accent-2) 34%, var(--border));
  background: color-mix(in srgb, var(--accent-2) 12%, transparent);
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.learning-card-link,
.subject-card-link {
  display: inline-flex;
  align-items: center;
  margin-top: 1rem;
  color: var(--accent-2);
  font-size: 0.92rem;
}

.subject-card-topics,
.subject-overview-topics,
.tip-list,
.checklist,
.steps-list {
  margin: 0.8rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-dim);
}

.steps-list li,
.tip-list li,
.checklist li,
.subject-card-topics li,
.subject-overview-topics li {
  margin-top: 0.35rem;
}

.section-tabs {
  margin-top: 8px;
  display: inline-flex;
  align-items: stretch;
  gap: 0;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.02);
}

.view-tab-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 11px;
  border-left: 2px solid var(--border);
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1;
  white-space: nowrap;
}

.view-tab-link:first-child {
  border-left: 0;
}

.view-tab-link:hover,
.view-tab-link:focus-visible {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.view-tab-link.active {
  background: rgba(199, 210, 254, 0.14);
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(199, 210, 254, 0.2);
}

.browser-card {
  padding: 1rem 1.1rem;
}

.browser-results {
  margin: 0;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.filter-bar {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.field,
.toggle {
  display: grid;
  gap: 0.35rem;
  min-width: 0;
}

.field-filter-select {
  min-width: 13rem;
}

.toggle {
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.55rem;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.field-label,
.meta-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-soft);
}

.field input,
.field select {
  min-height: 2.7rem;
  width: 100%;
  border-radius: 6px;
  border: 2px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  padding: 0 0.85rem;
}

.field select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  font-size: 1rem;
  line-height: 1.2;
  padding-right: 2.6rem;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--text-dim) 50%),
    linear-gradient(135deg, var(--text-dim) 50%, transparent 50%);
  background-position:
    calc(100% - 1.1rem) calc(50% - 0.1rem),
    calc(100% - 0.75rem) calc(50% - 0.1rem);
  background-size: 0.4rem 0.4rem, 0.4rem 0.4rem;
  background-repeat: no-repeat;
}

.field input::placeholder {
  color: var(--text-soft);
}

.browser-body {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.resource-group {
  display: grid;
  gap: 0.8rem;
}

.resource-grid {
  display: grid;
  gap: 1rem;
}

.resource-card {
  display: grid;
  gap: 0.85rem;
  min-width: 0;
  padding: 1rem 1.05rem;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--panel);
}

.resource-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

.resource-title {
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.28;
}

.resource-description {
  margin: 0;
  color: var(--text-dim);
}

.meta-cluster {
  display: grid;
  gap: 0.7rem;
}

.meta-group {
  display: grid;
  gap: 0.35rem;
}

.token-list,
.badge-list,
.mini-resource-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.token,
.badge-chip {
  display: inline-flex;
  align-items: center;
  min-height: 1.9rem;
  padding: 0.28rem 0.58rem;
  border-radius: 999px;
  border: 2px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-dim);
  font-size: 0.78rem;
}

.badge-chip {
  font-size: 0.72rem;
  letter-spacing: 0.03em;
}

.badge-official,
.badge-free,
.badge-no-signup,
.badge-beginner-friendly {
  border-color: rgba(72, 187, 120, 0.35);
  background: rgba(72, 187, 120, 0.12);
  color: #9ae6b4;
}

.badge-nonprofit,
.badge-open {
  border-color: color-mix(in srgb, var(--accent-2) 30%, var(--border));
  background: color-mix(in srgb, var(--accent-2) 10%, transparent);
  color: var(--accent-2);
}

.badge-signup-required,
.badge-printable,
.badge-practice,
.badge-video {
  border-color: rgba(199, 210, 254, 0.35);
  background: rgba(199, 210, 254, 0.12);
  color: var(--accent-2);
}

.resource-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  min-height: 40px;
  padding: 9px 12px;
  border-radius: 6px;
  border: 2px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  color: var(--text);
  width: fit-content;
}

.resource-link:hover,
.resource-link:focus-visible {
  border-color: rgba(199, 210, 254, 0.4);
  background: rgba(199, 210, 254, 0.1);
}

.browser-empty {
  margin: 1rem 0 0;
  padding: 0.9rem 1rem;
  border-radius: 6px;
  border: 1px dashed var(--border);
  color: var(--text-dim);
}

.plan-card {
  display: grid;
  gap: 1rem;
}

.plan-steps {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 1rem;
}

.plan-step {
  padding-left: 0.15rem;
}

.plan-step-head {
  display: grid;
  gap: 0.25rem;
}

.plan-step-title,
.plan-step-focus {
  margin: 0;
}

.plan-step-focus {
  color: var(--accent-2);
}

.plan-step-meta {
  margin: 0.4rem 0 0;
  color: var(--text-dim);
}

.mini-resource-list {
  margin-top: 0.6rem;
}

.mini-resource-list a {
  color: var(--accent-2);
}

.official-info-grid,
.subject-overview-grid {
  margin-top: 1rem;
}

.subject-overview-format {
  margin-top: 0.65rem;
}

.fineprint {
  margin: 18px auto 0;
  max-width: var(--max-width);
  border-top: 2px solid var(--line);
  padding: 14px 18px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
  position: relative;
}

.fineprint-sources {
  padding: 0.6rem 0;
}

.footer-about-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.about-panel {
  margin: 10px auto 0;
  max-width: 720px;
  text-align: left;
  border: 2px solid var(--line);
  border-radius: 0.3rem;
  background: rgba(255, 255, 255, 0.02);
  padding: 0.45rem 0.6rem;
}

.about-panel summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
  list-style: none;
}

.about-panel summary::-webkit-details-marker {
  display: none;
}

.about-panel p {
  margin: 0.5rem 0 0;
  color: var(--text-dim);
  font-size: 0.76rem;
  line-height: 1.45;
}

.footer-controls {
  position: absolute;
  right: 18px;
  top: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-badge {
  border: 2px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.55rem;
  font-size: 0.72rem;
  line-height: 1;
  background: var(--panel);
  color: var(--text-dim);
  font-family: var(--mono);
}

.status-ok {
  border-color: rgba(72, 187, 120, 0.45);
  color: #9ae6b4;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .site-header {
    padding-top: 5.4rem;
  }

  .topbar-content {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .ecosystem-nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.1rem;
    flex-wrap: nowrap;
  }

  .ecosystem-nav a,
  .ecosystem-nav .active {
    white-space: nowrap;
  }

  .section-tabs {
    display: flex;
    width: calc(100vw - 36px);
    max-width: 100%;
  }

  .footer-controls {
    position: static;
    margin: 10px auto 0;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (min-width: 720px) {
  .filter-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: end;
  }

  .field-search {
    grid-column: 1 / -1;
  }

  .subjects-grid,
  .learning-grid,
  .official-info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .resource-grid,
  .plans-grid,
  .subject-overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .container {
    gap: 1.25rem;
  }

  .hero-card {
    padding: 1.35rem 1.4rem;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .filter-bar {
    grid-template-columns: 2fr minmax(13rem, 1fr) minmax(13rem, 1fr) repeat(4, auto);
  }

  .field-search {
    grid-column: auto;
  }

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

  .resource-grid,
  .plans-grid,
  .subject-overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}