/* VoltageGoblin education — ages 13–18 (high school) */

:root {
  --bg: #0c0a12;
  --bg-elevated: #161222;
  --bg-panel: #1c1730;
  --line: rgba(163, 255, 0, 0.18);
  --line-soft: rgba(255, 255, 255, 0.08);
  --text: #f4f1fb;
  --muted: #a79aba;
  --primary: #a3ff00;
  --primary-ink: #102000;
  --accent: #7b5cff;
  --accent-soft: rgba(123, 92, 255, 0.22);
  --danger: #ff6b7a;
  --success: #3dd68c;
  --warning: #ffc857;
  --radius: 18px;
  --radius-sm: 10px;
  --max: 1120px;
  --font: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --font-display: "Syne", "Source Sans 3", system-ui, sans-serif;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%, rgba(123, 92, 255, 0.28), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 0%, rgba(163, 255, 0, 0.12), transparent 50%),
    linear-gradient(180deg, #120e1c 0%, var(--bg) 45%, #0a0810 100%);
  line-height: 1.55;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary);
  color: var(--primary-ink);
  padding: 8px 12px;
  z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: linear-gradient(180deg, #9727dd 0%, #b531f0 100%);
  border-bottom: 0;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: grid;
  grid-template-columns: 180px 1fr;
  grid-template-rows: minmax(102px, auto) auto;
  gap: 0;
  min-height: 148px;
  align-items: stretch;
  padding: 0;
}
.header-inner::before {
  content: "LET'S LEVEL UP!";
  grid-column: 2;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.5rem 0.8rem;
  color: #fff7ff;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
  color: #f7ffca;
  text-decoration: none;
  background: #27110f;
  border-right: 2px solid rgba(0, 0, 0, 0.25);
  grid-column: 1;
  grid-row: 1 / span 2;
  min-height: 100%;
  padding: 1rem 0.9rem;
  text-align: center;
}
.brand-lockup:hover { text-decoration: none; }
.brand-lockup img {
  width: 88px;
  height: 88px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.35rem;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-text strong {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  color: #d7ff3f;
}
.brand-text span {
  color: #fff;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: nowrap;
  background: var(--primary);
  grid-column: 2;
  grid-row: 2;
  min-height: 46px;
  border-radius: 0 12px 12px 0;
  overflow-x: auto;
  justify-content: stretch;
}
.site-nav a {
  color: #231509;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  opacity: 1;
  padding: 0.85rem 1.1rem;
  white-space: nowrap;
  border-right: 1px solid rgba(39, 17, 15, 0.16);
  flex: 1 0 auto;
  text-align: center;
}
.site-nav a:hover { color: #231509; background: rgba(255, 255, 255, 0.18); }
.site-nav .btn {
  border-radius: 0;
  border: 0;
  min-height: 100%;
  padding-inline: 1.2rem;
}
.site-nav .btn-primary {
  background: var(--accent);
  color: #fff;
}

.menu-toggle {
  display: none;
  border: 0;
  background: rgba(39, 17, 15, 0.18);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 1.1rem;
  cursor: pointer;
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  align-self: start;
  margin: 0.75rem 0.75rem 0 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--primary);
  color: var(--primary-ink);
}
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-danger {
  background: transparent;
  border-color: rgba(255, 107, 122, 0.45);
  color: var(--danger);
}

.hero {
  padding: 4.5rem 0 3.5rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin-bottom: 1rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}
.hero-lead {
  color: var(--muted);
  font-size: 1.12rem;
  max-width: 36rem;
  margin: 0 0 1.5rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.badge {
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.03);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.hero-panel {
  background: linear-gradient(160deg, rgba(123, 92, 255, 0.22), rgba(163, 255, 0, 0.08));
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 8px);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.hero-panel h2 {
  font-family: var(--font-display);
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}
.stat {
  background: rgba(0, 0, 0, 0.28);
  border-radius: var(--radius-sm);
  padding: 0.9rem;
}
.stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
}
.stat span {
  color: var(--muted);
  font-size: 0.85rem;
}

.section {
  padding: 3.25rem 0;
}
.section-alt {
  background: rgba(255, 255, 255, 0.02);
  border-block: 1px solid var(--line-soft);
}
.section-head {
  max-width: 40rem;
  margin-bottom: 1.75rem;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin: 0 0 0.6rem;
}
.section-head p {
  margin: 0;
  color: var(--muted);
}

.card-grid {
  display: grid;
  gap: 1rem;
}
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.card h3 {
  font-family: var(--font-display);
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}
.card p {
  margin: 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: start;
}

.nimbo-callout {
  border: 1px dashed rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  background: rgba(255, 255, 255, 0.03);
}
.nimbo-callout h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
}
.nimbo-callout p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.site-footer {
  margin-top: 2rem;
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 0.92rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--primary); }

/* Videos gallery */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}
.chip {
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
}
.chip.is-active,
.chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(163, 255, 0, 0.08);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.video-card {
  background: var(--bg-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.video-thumb {
  aspect-ratio: 16 / 9;
  background: #000;
  object-fit: cover;
  width: 100%;
}
.video-thumb-placeholder {
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #241b3d, #132015);
  color: var(--muted);
  font-weight: 700;
}
.video-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  flex: 1;
}
.video-body h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
}
.video-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  flex: 1;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.65rem;
}
.tag {
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
}

.empty-state,
.status-banner {
  border: 1px solid var(--line-soft);
  background: var(--bg-elevated);
  border-radius: var(--radius);
  padding: 1.25rem;
  color: var(--muted);
}
.status-banner.is-error {
  border-color: rgba(255, 107, 122, 0.4);
  color: #ffc0c7;
}
.status-banner.is-ok {
  border-color: rgba(61, 214, 140, 0.35);
  color: #b8f5d4;
}

/* Auth */
.auth-page {
  min-height: calc(100vh - 2rem);
  display: grid;
  place-items: center;
  padding: 2rem 1rem;
}
.auth-card {
  width: min(100%, 440px);
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}
.auth-card h1 {
  font-family: var(--font-display);
  margin: 0.75rem 0 0.5rem;
}
.auth-card .lead {
  color: var(--muted);
  margin: 0 0 1.25rem;
}
.filters-panel {
  margin: 1rem 0 1.25rem;
  padding: 1rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
}
.filter-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}
.form-field label {
  font-weight: 700;
  font-size: 0.9rem;
}
.form-field input,
.form-field textarea,
.form-field select {
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);
  padding: 0.75rem 0.85rem;
  font: inherit;
}
.form-field textarea {
  min-height: 110px;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: 2px solid rgba(163, 255, 0, 0.35);
  border-color: var(--primary);
}
.dev-link {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  word-break: break-all;
}

/* Members shell */
.members-shell {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  padding: 1.75rem 0 3rem;
  align-items: start;
}
.members-nav {
  position: sticky;
  top: 92px;
  background: var(--bg-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.members-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  font-weight: 650;
}
.members-nav a:hover,
.members-nav a.is-active {
  background: rgba(163, 255, 0, 0.1);
  color: var(--primary);
}
.members-nav .nav-meta {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 0.82rem;
}
.members-main h1 {
  font-family: var(--font-display);
  margin: 0 0 0.35rem;
}
.members-main .page-lead {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.progress-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.progress-bar > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--primary));
}

.lesson-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.lesson-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.9rem;
  align-items: center;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background: var(--bg-panel);
}
.lesson-item.is-locked { opacity: 0.55; }
.lesson-status {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.05);
}
.lesson-status.done { background: rgba(61, 214, 140, 0.18); color: var(--success); }
.lesson-status.available { background: rgba(163, 255, 0, 0.14); color: var(--primary); }
.lesson-item h3 {
  margin: 0 0 0.25rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
}
.lesson-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.video-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--line-soft);
  margin-bottom: 1.25rem;
}
.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.markdown-block {
  white-space: pre-wrap;
  color: var(--text);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.hint-list {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.hint-list li { margin-bottom: 0.35rem; }

@media (max-width: 900px) {
  .hero-grid,
  .split,
  .card-grid-3,
  .card-grid-2,
  .members-shell {
    grid-template-columns: 1fr;
  }
  .filter-grid {
    grid-template-columns: 1fr;
  }
  .menu-toggle { display: inline-flex; }
  .header-inner {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    min-height: 0;
  }
  .header-inner::before {
    grid-column: 1;
    grid-row: 2;
    font-size: clamp(1.5rem, 8vw, 2.4rem);
    padding: 0.5rem 1rem 0.75rem;
  }
  .brand-lockup {
    grid-column: 1;
    grid-row: 1;
    flex-direction: row;
    justify-content: flex-start;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 82px;
  }
  .brand-lockup img {
    width: 54px;
    height: 54px;
  }
  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    grid-column: 1;
    grid-row: 3;
    border-radius: 0 0 12px 12px;
  }
  .site-header.is-open .site-nav { display: flex; }
  .members-nav { position: static; flex-direction: row; flex-wrap: wrap; }
}