:root {
  --bg0: #07121d;
  --bg1: #0f2436;
  --panel: rgba(18, 42, 62, 0.82);
  --line: rgba(148, 197, 220, 0.18);
  --text: #e8f2f8;
  --muted: #8eadc0;
  --accent: #3ecfba;
  --accent2: #f0b429;
  --danger: #ff7b72;
  --radius: 18px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  font-family: "DM Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, #1a4a63 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #16324a 0%, transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 55%, #0a1826);
}

body {
  min-height: 100dvh;
  -webkit-tap-highlight-color: transparent;
}

.app {
  width: min(480px, 100%);
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 16px 32px;
}

.top {
  padding: 8px 4px 18px;
  animation: rise 0.55s ease both;
}

.brand {
  margin: 0;
  letter-spacing: 0.28em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 700;
}

.top h1 {
  margin: 8px 0 6px;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  animation: rise 0.65s ease both;
}

.panel + .panel { margin-top: 14px; }

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.field input,
.field select {
  appearance: none;
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(5, 16, 27, 0.65);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
  font: 500 1rem/1.2 "IBM Plex Mono", monospace;
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(62, 207, 186, 0.45);
  border-color: var(--accent);
}

.more {
  margin: 4px 0 14px;
  border-top: 1px dashed var(--line);
  padding-top: 8px;
}

.more summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 8px 0;
  list-style: none;
}

.more summary::-webkit-details-marker { display: none; }

.grid2, .grid3 {
  display: grid;
  gap: 10px;
}

.grid2 { grid-template-columns: 1fr 1fr; }
.grid3 { grid-template-columns: 1fr 1fr 1fr; }

.hint {
  margin: 0 0 4px;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.45;
}

.cta {
  width: 100%;
  border: 0;
  border-radius: 14px;
  padding: 14px 16px;
  font: 700 1.05rem/1 "DM Sans", sans-serif;
  color: #052018;
  background: linear-gradient(135deg, #5fe3cf, var(--accent) 45%, #2aa894);
  box-shadow: 0 10px 24px rgba(62, 207, 186, 0.28);
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.cta:active { transform: scale(0.98); }
.cta:disabled {
  filter: grayscale(0.4) brightness(0.85);
  cursor: wait;
}

.status {
  min-height: 1.2em;
  margin: 10px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.status.error { color: var(--danger); }

.hidden { display: none !important; }

.meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 12px;
  line-height: 1.5;
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric {
  background: rgba(5, 16, 27, 0.45);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
}

.metric .k {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.metric .v {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  font-weight: 500;
  word-break: break-all;
}

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

.chart-wrap {
  margin-top: 18px;
}

.chart-wrap h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 600;
}

.chart-wrap canvas {
  max-height: 280px;
}

.species {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.species li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9rem;
}

.species li span:last-child {
  font-family: "IBM Plex Mono", monospace;
  color: var(--accent2);
}

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 720px) {
  .app { padding-top: 28px; }
}