:root {
  --bg: #0f172a;
  --card: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --font: 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.app { max-width: 960px; margin: 0 auto; padding: 1.5rem; }

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; font-weight: 700;
}
h1 { font-size: 1.35rem; font-weight: 700; }
.subtitle { font-size: 0.8rem; color: var(--muted); }

.mode-switch { display: flex; gap: 0.25rem; background: var(--card); padding: 4px; border-radius: 8px; }
.mode-btn {
  padding: 0.4rem 1rem;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s;
}
.mode-btn.active { background: var(--primary); color: white; }

.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}
.tab {
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.2s;
}
.tab:hover { border-color: var(--primary); color: var(--text); }
.tab.active { background: var(--primary); border-color: var(--primary); color: white; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

h2 { font-size: 1.2rem; margin-bottom: 0.5rem; }
h3 { font-size: 1rem; margin: 1.25rem 0 0.75rem; color: var(--muted); }
.hint { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.25rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field label { font-size: 0.8rem; color: var(--muted); font-weight: 500; }
.field input, .field select {
  padding: 0.55rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
}

.spell-row {
  display: grid;
  grid-template-columns: 1fr 1fr 80px 80px auto;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  align-items: end;
}
@media (max-width: 640px) {
  .spell-row { grid-template-columns: 1fr 1fr; }
}

.btn {
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.2s;
  margin-top: 1rem;
}
.btn.primary { background: var(--primary); color: white; }
.btn.primary:hover { background: var(--primary-hover); }
.btn.secondary { background: transparent; border: 1px solid var(--border); color: var(--muted); }
.btn.secondary:hover { border-color: var(--primary); color: var(--text); }

.result-box {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
}
.result-box.hidden { display: none; }
.result-box h3 { color: var(--primary); margin-bottom: 0.75rem; }
.result-box .big { font-size: 1.8rem; font-weight: 700; color: var(--success); font-family: var(--mono); }
.result-box table { width: 100%; border-collapse: collapse; margin-top: 0.75rem; }
.result-box td { padding: 0.4rem 0; border-bottom: 1px solid var(--border); }
.result-box td:last-child { text-align: right; font-family: var(--mono); }
.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  margin: 0.15rem;
}
.badge.ok { background: rgba(34,197,94,0.15); color: var(--success); }
.badge.warn { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge.no { background: rgba(239,68,68,0.15); color: var(--danger); }

footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--muted);
  padding: 1rem;
}