:root {
  --bg: #08111c;
  --bg-elevated: rgba(11, 22, 36, 0.88);
  --bg-panel: rgba(16, 30, 46, 0.86);
  --line: rgba(88, 140, 176, 0.34);
  --line-strong: rgba(120, 198, 220, 0.48);
  --text: #e8f1f7;
  --muted: #8ea8bc;
  --accent: #70f0ff;
  --accent-deep: #29b9d8;
  --warn: #ffb85c;
  --danger: #ff7f96;
  --success: #7ff2b3;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body.landing-page {
  font-family: Bahnschrift, "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(32, 126, 163, 0.24), transparent 26%),
    radial-gradient(circle at 88% 18%, rgba(255, 184, 92, 0.16), transparent 18%),
    linear-gradient(135deg, #071019 0%, #0b1622 48%, #08111c 100%);
}

body.landing-page::before,
body.landing-page::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body.landing-page::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.3;
}

body.landing-page::after {
  background:
    radial-gradient(circle at 10% 20%, rgba(112, 240, 255, 0.12), transparent 16%),
    radial-gradient(circle at 80% 78%, rgba(255, 184, 92, 0.08), transparent 20%);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

.landing-shell {
  position: relative;
  max-width: 1360px;
  margin: 0 auto;
  padding: 32px 28px 48px;
}

.grid-noise {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(112, 240, 255, 0.08);
  border-radius: 32px;
  background:
    linear-gradient(90deg, transparent 0 24%, rgba(112, 240, 255, 0.03) 24% 25%, transparent 25% 49%, rgba(112, 240, 255, 0.03) 49% 50%, transparent 50% 74%, rgba(112, 240, 255, 0.03) 74% 75%, transparent 75%),
    linear-gradient(transparent 0 24%, rgba(112, 240, 255, 0.03) 24% 25%, transparent 25% 49%, rgba(112, 240, 255, 0.03) 49% 50%, transparent 50% 74%, rgba(112, 240, 255, 0.03) 74% 75%, transparent 75%);
  opacity: 0.55;
  pointer-events: none;
}

.hero-grid,
.content-grid {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  align-items: start;
  margin-bottom: 24px;
}

.hero-copy {
  padding: 28px 0 12px;
  min-width: 0;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 12px;
  font-family: Consolas, "Courier New", monospace;
  letter-spacing: 0.24em;
  font-size: 12px;
  color: var(--accent);
}

.hero-copy h1,
.panel-head h2,
.feature-panel h3,
.admin-panel h3 {
  margin: 0;
  font-family: Bahnschrift, "Arial Narrow", sans-serif;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.hero-copy h1 {
  max-width: 1180px;
  font-size: clamp(2.4rem, 4vw, 4.6rem);
  line-height: 0.96;
}

.hero-lead {
  max-width: 1080px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.7;
}

.hero-actions,
.auth-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin: 26px 0 22px;
}

.quiz-cta {
  min-height: 54px;
  padding: 0 28px;
  font-size: 1rem;
  box-shadow: 0 20px 42px rgba(112, 240, 255, 0.34);
}

.hero-actions.compact {
  margin: 18px 0 0;
}

.action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 20, 32, 0.72);
  color: var(--text);
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.action:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.action.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent) 0%, #56c8ff 100%);
  color: #06111c;
  box-shadow: 0 12px 30px rgba(112, 240, 255, 0.24);
  font-weight: 700;
}

.action.secondary {
  background: rgba(112, 240, 255, 0.08);
  border-color: rgba(112, 240, 255, 0.28);
}

.action.ghost {
  background: linear-gradient(135deg, rgba(255, 184, 92, 0.08), rgba(112, 240, 255, 0.08));
  border-color: rgba(255, 184, 92, 0.3);
}

.action.subtle {
  background: rgba(255, 255, 255, 0.02);
}

.hero-stats,
.feature-list,
.signal-list,
.auth-layout {
  display: grid;
  gap: 14px;
}

.hero-stats {
  grid-template-columns: repeat(3, minmax(180px, 220px));
}

.stat-card,
.surface {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.stat-card {
  min-height: 134px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stat-card::after,
.surface::after {
  content: "";
  position: absolute;
  inset: auto 18px 14px auto;
  width: 92px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(112, 240, 255, 0.45));
}

.stat-value {
  font-family: Consolas, "Courier New", monospace;
  font-size: 2.1rem;
  color: var(--accent);
}

.stat-label,
.mini-note,
.small,
.feature-panel p,
.session-panel p,
.message-strip,
.field span,
.log-block h4,
.panel-head p {
  color: var(--muted);
}

.status-panel,
.auth-panel,
.feature-panel,
.session-panel,
.admin-panel {
  padding: 24px;
}

.status-panel {
  margin-top: 20px;
  max-width: 1080px;
  font-size: 0.98rem;
  line-height: 1.7;
}

.hero-overview-panel {
  margin-top: 24px;
  width: 100%;
}

.auth-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-self: start;
}

.panel-head p {
  margin: 10px 0 0;
  line-height: 1.6;
}

.auth-layout {
  grid-template-columns: 1fr;
  margin: 22px 0 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field span {
  font-size: 0.92rem;
}

.field input,
.field select {
  font-size: 0.92rem;
}

.auth-flow-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.auth-flow-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.auth-flow-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(112, 240, 255, 0.14);
  border-radius: 999px;
  background: rgba(112, 240, 255, 0.05);
  color: #cfe6f4;
  font-size: 0.86rem;
}

.message-strip[data-state="error"] {
  color: var(--danger);
}

.message-strip[data-state="success"] {
  color: var(--success);
}

.message-strip[data-state="info"] {
  color: var(--warn);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  align-items: start;
}

.course-overview-panel {
  grid-column: 1 / -1;
}

.feature-list {
  margin-top: 18px;
}

.feature-list article {
  padding: 16px 0;
  border-top: 1px solid rgba(112, 240, 255, 0.14);
}

.feature-list article:first-child {
  border-top: 0;
  padding-top: 0;
}

.feature-list strong,
.session-top strong {
  display: block;
  font-size: 1.08rem;
}

.feature-list p,
.session-panel p {
  margin: 8px 0 0;
  line-height: 1.7;
}

.signal-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.module-teaser-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.module-teaser-grid article {
  min-height: 100%;
  padding: 16px;
  border: 1px solid rgba(112, 240, 255, 0.14);
  border-radius: 18px;
  background: rgba(8, 18, 30, 0.72);
}

.module-teaser-grid strong {
  display: block;
  font-size: 1rem;
  line-height: 1.4;
}

.module-teaser-grid p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.signal-list span {
  min-height: 54px;
  display: flex;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid rgba(112, 240, 255, 0.12);
  border-radius: 16px;
  background: rgba(8, 18, 30, 0.72);
  color: #cfe6f4;
}

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

.compact-head {
  margin-bottom: 18px;
}

.admin-actions {
  margin-bottom: 18px;
}

.users-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  margin: 10px 0;
  border: 1px solid rgba(112, 240, 255, 0.12);
  border-radius: 16px;
  background: rgba(5, 14, 24, 0.54);
}

.users-row input[type="checkbox"] {
  width: 22px;
  height: 22px;
  accent-color: var(--accent);
}

.log-block {
  margin-top: 20px;
}

.quiz-admin-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 20px;
}

.quiz-admin-head h4 {
  margin: 0;
  font-size: 0.96rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.quiz-results-grid {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.quiz-result-card {
  padding: 14px 16px;
  border: 1px solid rgba(112, 240, 255, 0.14);
  border-radius: 18px;
  background: rgba(5, 14, 24, 0.62);
}

.quiz-result-card strong {
  display: block;
  font-size: 1rem;
}

.quiz-result-meta {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.93rem;
}

.quiz-result-status {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin-top: 10px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid rgba(112, 240, 255, 0.2);
  color: var(--accent);
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
}

.quiz-result-status.pass {
  border-color: rgba(127, 242, 179, 0.3);
  color: var(--success);
}

.quiz-result-status.fail {
  border-color: rgba(255, 184, 92, 0.3);
  color: var(--warn);
}

.log-block h4 {
  margin: 0 0 12px;
  font-size: 0.96rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

#logs {
  min-height: 120px;
  margin: 0;
  padding: 16px;
  overflow: auto;
  border: 1px solid rgba(112, 240, 255, 0.12);
  border-radius: 16px;
  background: rgba(5, 14, 24, 0.6);
  white-space: pre-wrap;
}

.hide {
  display: none !important;
}

@media (max-width: 1120px) {
  .hero-copy {
    padding-right: 0;
  }

  .hero-stats {
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  }
}

@media (max-width: 720px) {
  .landing-shell {
    padding: 18px 16px 28px;
  }

  .hero-stats,
  .signal-list,
  .module-teaser-grid {
    grid-template-columns: 1fr;
  }

  .session-top,
  .hero-actions,
  .auth-actions {
    flex-direction: column;
  }

  .action {
    width: 100%;
  }
}