:root {
  --primary: #176822;
  --primary-dark: #0d4515;
  --sand: #f6f1e8;
  --ink: #142117;
  --muted: #5e6c60;
  --white: #ffffff;
  --shadow: 0 20px 45px rgba(9, 38, 13, 0.14);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Barlow", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(23, 104, 34, 0.18), transparent 32%),
    linear-gradient(160deg, #edf5ee 0%, var(--sand) 58%, #fdfcf8 100%);
}

.app-shell {
  width: min(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero,
.panel {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(23, 104, 34, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 28px;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  align-items: center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -80px -80px auto;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 104, 34, 0.25), transparent 70%);
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 110px;
  padding: 20px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(23, 104, 34, 0.12), rgba(23, 104, 34, 0.02));
}

.brand-logo {
  max-width: 100%;
  max-height: 76px;
  object-fit: contain;
}

.brand-fallback {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--primary);
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--primary);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 0.95;
}

.intro {
  margin: 14px 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.1rem;
}

.panel {
  margin-top: 22px;
  padding: 28px;
}

.race-form label {
  display: block;
  margin-bottom: 10px;
  font-size: 1rem;
  font-weight: 700;
}

.input-row {
  display: flex;
  gap: 12px;
}

.input-row input {
  flex: 1;
  min-width: 0;
  padding: 18px 20px;
  font: inherit;
  font-size: 1.2rem;
  border: 2px solid rgba(23, 104, 34, 0.2);
  border-radius: 18px;
  background: var(--white);
  color: var(--ink);
}

.input-row input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 5px rgba(23, 104, 34, 0.14);
}

.input-row button {
  border: 0;
  border-radius: 18px;
  padding: 0 26px;
  font: inherit;
  font-weight: 800;
  font-size: 1rem;
  color: var(--white);
  background: linear-gradient(180deg, #1d7f2a 0%, var(--primary) 100%);
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.input-row button:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 24px rgba(23, 104, 34, 0.18);
}

.hint {
  margin: 10px 2px 0;
  color: var(--muted);
}

.status-card {
  margin-top: 18px;
  min-height: 64px;
  padding: 18px 20px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(23, 104, 34, 0.08), rgba(23, 104, 34, 0.02));
  color: #0d4515;
  font-size: 1.03rem;
  font-weight: 600;
}

.status-card.warning {
  background: linear-gradient(180deg, rgba(164, 92, 9, 0.12), rgba(164, 92, 9, 0.04));
  color: #7d4a0c;
}

.status-card.success {
  background: linear-gradient(180deg, rgba(14, 122, 54, 0.14), rgba(14, 122, 54, 0.05));
  color: #115f25;
}

.metrics {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card {
  padding: 18px;
  border-radius: 20px;
  background: var(--white);
  border: 1px solid rgba(23, 104, 34, 0.12);
}

.metric-label {
  display: block;
  margin-bottom: 10px;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.metric-card strong {
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1;
}

@media (max-width: 840px) {
  .hero {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 560px) {
  .app-shell {
    width: min(100% - 20px, 1080px);
    padding-top: 20px;
  }

  .hero,
  .panel {
    padding: 20px;
  }

  .input-row {
    flex-direction: column;
  }

  .input-row button {
    min-height: 58px;
  }

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