:root {
  color-scheme: dark;
  --bg: #090d18;
  --panel: #111830;
  --panel-2: #1a2345;
  --text: #f2f5ff;
  --muted: #afbbdf;
  --accent: #73a4ff;
  --ok: #2ac487;
  --warn: #f2b24f;
  --bad: #ff6f79;
  --border: #2a396f;
  --glow: rgba(115, 164, 255, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Arial, sans-serif;
  background: radial-gradient(circle at top, #122050 0%, var(--bg) 45%);
  color: var(--text);
}

.container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 24px;
}

h1, h2, h3 {
  margin: 0 0 12px;
}

.hero {
  margin-bottom: 18px;
}

.hero h1 {
  font-size: 34px;
  letter-spacing: 0.2px;
}

.muted {
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 0 0 1px rgba(40, 55, 110, 0.25), 0 10px 30px rgba(0, 0, 0, 0.2);
}

details.card {
  padding-top: 8px;
}

details > summary {
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  margin: 2px 0 16px;
  color: #d8e0ff;
}

details > summary::marker,
details > summary::-webkit-details-marker {
  display: none;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.one {
  grid-template-columns: 1fr;
}

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

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

input {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 8px;
  padding: 10px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.actions {
  margin: 20px 0;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.actions.compact {
  justify-content: flex-start;
  margin: 10px 0 14px;
}

button {
  border: none;
  border-radius: 10px;
  padding: 12px 18px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(180deg, #8cb5ff, var(--accent));
  color: #0a132e;
  box-shadow: 0 10px 20px rgba(31, 74, 160, 0.35);
}

button:hover {
  transform: translateY(-1px);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 920px;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--border);
  padding: 8px;
}

.data-table th {
  text-align: left;
  font-size: 12px;
  color: #d6ddff;
  background: #1b2550;
}

.data-table td input {
  min-width: 110px;
  padding: 7px;
  font-size: 12px;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 40;
}

.modal.hidden {
  display: none;
}

.modal-card {
  width: min(520px, 92vw);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 18, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.loading-overlay.hidden {
  display: none;
}

.loading-card {
  width: min(420px, 90vw);
  text-align: center;
  padding: 22px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #15234d, #111830);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.spinner {
  width: 54px;
  height: 54px;
  margin: 0 auto 12px;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.15);
  border-top-color: #8cb5ff;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.metric-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  padding: 12px;
}

.metric-card h3 {
  font-size: 14px;
  margin-bottom: 10px;
  color: #ced5ff;
}

.metric-card p {
  margin: 5px 0;
  font-size: 13px;
}

.metric-card p strong {
  color: #d8e0ff;
}

.signal {
  font-weight: 700;
}

.signal.good {
  color: var(--ok);
}

.signal.mid {
  color: var(--warn);
}

.signal.bad {
  color: var(--bad);
}

@media (max-width: 980px) {
  .grid.four,
  .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .grid.two,
  .grid.four,
  .result-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 28px;
  }
}