:root {
  --bg: #0f172a;
  --surface: #111827;
  --surface-2: #1f2937;
  --border: rgba(255,255,255,.08);
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #22c55e;
  --accent-2: #38bdf8;
  --danger: #ef4444;
  --shadow: 0 20px 50px rgba(0,0,0,.25);
  --radius: 22px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(56,189,248,.18), transparent 25%),
    radial-gradient(circle at top right, rgba(34,197,94,.14), transparent 22%),
    var(--bg);
  color: var(--text);
}

.app-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 18px 60px;
}

.view.hidden { display:none; }

.hero {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 18px;
  align-items: stretch;
  margin-bottom: 18px;
}

.hero-landing {
  align-items: center;
  margin-bottom: 28px;
}

.hero h1 {
  margin: 6px 0 10px;
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.05;
}

.eyebrow, .label {
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .75rem;
  font-weight: 700;
}

.subtitle, .muted { color: var(--muted); }
.subtitle.large { max-width: 720px; font-size: 1.08rem; }
.small { font-size: .92rem; }

.hero-actions {
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  margin-top:20px;
}
.hero-actions.compact { justify-content:flex-end; }

.hero-card,
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.status-card,
.card { padding: 20px; }

.status-card {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 16px;
}

.metric-card {
  height: 100%;
  padding: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.steps-list {
  margin: 14px 0 0;
  padding-left: 20px;
  color: var(--text);
  display:grid;
  gap:12px;
}

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

.feature-card h2 {
  margin-top: 10px;
  margin-bottom: 10px;
  font-size: 1.25rem;
}

.info-section { margin-bottom: 12px; }
.section-head h2 { margin:4px 0 0; }
.info-columns {
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:24px;
}
.bullet-list {
  margin: 10px 0 0;
  padding-left: 20px;
  display:grid;
  gap:10px;
  color: var(--muted);
}

.auth-wrap {
  min-height: calc(100vh - 120px);
  display:grid;
  place-items:center;
}

.auth-card {
  width:min(520px, 100%);
  padding:28px;
}

.auth-brand h2 {
  margin: 6px 0 10px;
  font-size: 2rem;
}

.auth-form {
  margin-top: 24px;
  display:grid;
  gap: 14px;
}

.full { width:100%; }

.grid {
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap:18px;
}

.card-wide { grid-column: 1 / -1; }

.card-header {
  display:flex;
  justify-content:space-between;
  gap:12px;
  align-items:center;
  margin-bottom:18px;
}

.card-header h2 {
  margin:4px 0 0;
  font-size:1.35rem;
}

.form-row {
  display:grid;
  gap:8px;
  margin-bottom:14px;
}

label { color: var(--muted); font-size:.95rem; }

input {
  width:100%;
  border:1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
  border-radius:14px;
  padding:14px 16px;
  outline:none;
}

input:focus {
  border-color: rgba(56,189,248,.75);
  box-shadow: 0 0 0 4px rgba(56,189,248,.12);
}

.btn {
  border:0;
  border-radius:14px;
  padding:12px 16px;
  font-weight:700;
  cursor:pointer;
  color:#04111f;
  background: linear-gradient(135deg, var(--accent), #4ade80);
}
.btn:hover { filter: brightness(1.03); }

.btn-secondary {
  background: rgba(56,189,248,.14);
  color: #dff4ff;
  border:1px solid rgba(56,189,248,.25);
}

.btn-ghost {
  background: rgba(255,255,255,.04);
  color: var(--text);
  border:1px solid var(--border);
}

.btn-accent {
  background: linear-gradient(135deg, #38bdf8, #22c55e);
  color:#031722;
}

.inline-actions {
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.inline-actions.compact { justify-content:flex-end; }

.info-box,
.question-box,
.output-panel {
  border:1px solid var(--border);
  border-radius:18px;
  background: rgba(255,255,255,.025);
}

.info-box { margin-top:14px; padding:14px 16px; }
.question-box { padding:20px; min-height:190px; }
.question-box.empty { color: var(--muted); }
.question-title { margin:0 0 14px; font-size:1.2rem; }
.options { display:grid; gap:10px; }
.option {
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 14px;
  background: rgba(255,255,255,.03);
}
.option.correct {
  border-color: rgba(34,197,94,.45);
  background: rgba(34,197,94,.12);
}

.tabs { display:flex; gap:10px; margin-bottom:14px; }
.tab {
  border:1px solid var(--border);
  border-radius:999px;
  padding:10px 14px;
  background: rgba(255,255,255,.03);
  color: var(--text);
  cursor:pointer;
}
.tab.active {
  background: rgba(56,189,248,.15);
  border-color: rgba(56,189,248,.28);
}

.output-panel {
  padding:16px;
  overflow:auto;
  min-height:280px;
  white-space: pre-wrap;
}
.output-table { width:100%; border-collapse:collapse; }
.output-table th,
.output-table td {
  border-bottom:1px solid var(--border);
  text-align:left;
  padding:10px 8px;
  font-size:.92rem;
  vertical-align:top;
}

.toast {
  position:fixed;
  right:18px;
  bottom:18px;
  max-width:380px;
  border-radius:16px;
  padding:14px 16px;
  background: rgba(2,6,23,.95);
  border:1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow);
}

.hidden { display:none !important; }

@media (max-width: 960px) {
  .hero,
  .feature-grid,
  .info-columns,
  .grid {
    grid-template-columns: 1fr;
  }

  .status-card,
  .card-header {
    align-items:flex-start;
    flex-direction:column;
  }
}