:root {
  --primary: #0f766e;
  --primary-dark: #115e59;
  --accent: #22c55e;
  --dark: #0f172a;
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.08);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #eef6f4 100%);
  color: var(--text);
}

a {
  text-decoration: none;
  color: var(--primary);
}

a:hover {
  color: var(--primary-dark);
}

.navbar {
  background: var(--dark);
  color: white;
  padding: 20px 42px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 24px;
  font-weight: 800;
}

.nav-right a {
  color: white;
  margin-left: 18px;
  font-weight: 600;
}

.wrapper {
  max-width: 1180px;
  margin: 36px auto;
  padding: 0 20px;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: stretch;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.hero h1 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 40px;
  line-height: 1.1;
}

.hero p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.hero-box {
  border-radius: 24px;
  padding: 30px;
  background: linear-gradient(135deg, #0f766e 0%, #22c55e 100%);
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: 0 16px 34px rgba(15, 118, 110, 0.2);
}

.hero-box h2 {
  margin: 0 0 12px 0;
  font-size: 28px;
}

.hero-box p {
  margin: 0;
  color: rgba(255,255,255,0.92);
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  margin-right: 12px;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: white;
}

.form-card {
  max-width: 460px;
  margin: 40px auto;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  margin-top: 14px;
}

input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  font-size: 15px;
  outline: none;
}

input:focus {
  border-color: var(--primary);
}

.flash {
  padding: 14px 16px;
  border-radius: 12px;
  margin-bottom: 16px;
  font-weight: 600;
}

.flash.success {
  background: #e9f8ef;
  color: #188754;
  border: 1px solid #cdeed9;
}

.flash.error {
  background: #fff0ee;
  color: #c0392b;
  border: 1px solid #ffd6d0;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.metric-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.metric {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 8px;
}

.small {
  color: var(--muted);
  line-height: 1.6;
}

.badge {
  display: inline-block;
  background: #e6fffa;
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  padding: 7px 10px;
  margin-bottom: 14px;
}

.admin-box pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 16px;
  border-radius: 14px;
  overflow-x: auto;
}

.notice {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 12px;
  background: #fff7ed;
  color: #9a3412;
  border: 1px solid #fed7aa;
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .navbar {
    padding: 18px 20px;
  }

  .hero h1 {
    font-size: 32px;
  }
}