:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --border: #e2ddd3;
  --text: #2b2a27;
  --muted: #767267;
  --accent: #3f6b4f;
  --accent-dark: #2e4f3a;
  --warn: #b3541e;
  --danger: #a33b3b;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: var(--accent-dark);
  color: #fff;
}

.brand { font-weight: 600; font-size: 1.1rem; }
.brand span { font-weight: 400; opacity: 0.75; font-size: 0.85rem; margin-left: 0.35rem; }

nav { display: flex; gap: 0.25rem; flex-wrap: wrap; }

.nav-link {
  color: #fff;
  text-decoration: none;
  padding: 0.4rem 0.7rem;
  border-radius: 6px;
  font-size: 0.9rem;
  opacity: 0.85;
}
.nav-link:hover { background: rgba(255,255,255,0.12); opacity: 1; }
.nav-link.active { background: rgba(255,255,255,0.2); opacity: 1; }

.content { max-width: 1000px; margin: 0 auto; padding: 1.75rem 1.5rem 4rem; }

h1 { margin-top: 0; font-size: 1.6rem; }
h2 { font-size: 1.1rem; }
.section-title { margin-top: 2rem; }
.muted { color: var(--muted); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.9rem;
  margin: 1.25rem 0 1.75rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.stat-value { font-size: 1.6rem; font-weight: 700; color: var(--accent-dark); }
.stat-label { font-size: 0.85rem; color: var(--muted); margin-top: 0.15rem; }
.stat-hint { font-size: 0.75rem; color: var(--muted); margin-top: 0.3rem; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}
@media (max-width: 720px) { .two-col { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  margin: 1rem 0;
}
.card h2 { margin-top: 0; }
.card-actions { margin-top: 0.8rem; }

.data-table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; }
.data-table th, .data-table td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.data-table th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
.data-table a { color: var(--accent-dark); }

.warn { color: var(--warn); font-weight: 600; }
.empty { color: var(--muted); font-style: italic; }
.total { font-size: 1.1rem; font-weight: 700; text-align: right; }

.form { display: flex; flex-direction: column; gap: 0.9rem; max-width: 480px; margin-top: 1rem; }
.field { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; }
.field span { color: var(--muted); }
.field input, .field select, .field textarea {
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--surface);
}
.field textarea { min-height: 5rem; resize: vertical; }

.user-box {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: #fff;
  font-size: 0.85rem;
  opacity: 0.9;
}
.user-box form { margin: 0; }
.user-box .btn-small { background: rgba(255,255,255,0.15); }
.user-box .btn-small:hover { background: rgba(255,255,255,0.28); }

.login-content { display: flex; justify-content: center; align-items: center; min-height: 90vh; }
.login-card { width: 100%; max-width: 360px; text-align: center; }
.login-card .form { text-align: left; }
.form-error { color: var(--danger); font-size: 0.9rem; }

.btn, .btn-small {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 7px;
  padding: 0.55rem 1rem;
  font-size: 0.92rem;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover, .btn-small:hover { background: var(--accent-dark); }
.btn-small { padding: 0.3rem 0.65rem; font-size: 0.82rem; }
.btn-small.danger { background: var(--danger); }