*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --green-dk: #0B4630;
  --green: #0E7C4C;
  --mint: #E7F5EC;
  --mint-2: #DDF3E4;
  --ink: #10241B;
  --muted: #55665D;
  --faint: #8FA097;
  --border: rgba(16,36,27,0.10);
  --border-bright: rgba(16,36,27,0.18);
  --white: #ffffff;
  --radius: 10px;
  --danger: #A32D2D;
  --danger-bg: #FCEBEB;
}

body {
  background: var(--mint);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 { font-family: 'Fraunces', serif; }
a { color: inherit; }

nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 48px;
  background: rgba(255,255,255,0.9);
  border-bottom: 1px solid var(--border);
}
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.nav-logo-mark {
  width: 40px; height: 40px; border-radius: 10px;
  background: linear-gradient(135deg, var(--green), var(--green-dk));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-family: 'Fraunces', serif; font-weight: 600; font-size: 16px;
  flex-shrink: 0;
}
.nav-logo-text { font-family: 'Fraunces', serif; font-weight: 600; font-size: 19px; letter-spacing: -0.01em; }
.nav-logo-text small { display: block; font-family: 'Inter', sans-serif; font-weight: 500; font-size: 10px; letter-spacing: 0.14em; color: var(--muted); }
.nav-links { display: flex; align-items: center; gap: 24px; list-style: none; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--green-dk); }

main { flex: 1; display: flex; align-items: center; justify-content: center; padding: 48px 20px; }

.auth-card {
  background: #fff; border-radius: 16px; border: 1px solid var(--border);
  padding: 44px; width: 100%; max-width: 420px;
}
.auth-title { font-size: 26px; font-weight: 600; color: var(--green-dk); margin-bottom: 6px; }
.auth-sub { font-size: 14px; color: var(--muted); margin-bottom: 28px; }
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.form-input {
  width: 100%; background: #fff; border: 1px solid var(--border-bright);
  color: var(--ink); padding: 12px 14px; font-family: 'Inter', sans-serif;
  font-size: 14px; border-radius: 8px; outline: none;
}
.form-input:focus { border-color: var(--green); }
.form-submit {
  width: 100%; background: var(--green-dk); color: #fff; border: none;
  padding: 14px; font-size: 15px; font-weight: 600; font-family: 'Inter', sans-serif;
  cursor: pointer; border-radius: 999px; margin-top: 8px;
}
.form-submit:hover { background: var(--green); }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.auth-switch { text-align: center; font-size: 13.5px; color: var(--muted); margin-top: 20px; }
.auth-switch a { color: var(--green-dk); font-weight: 600; text-decoration: none; }

.alert { padding: 12px 16px; border-radius: 8px; font-size: 13.5px; margin-bottom: 18px; display: none; }
.alert.show { display: block; }
.alert-error { background: var(--danger-bg); color: var(--danger); }
.alert-success { background: var(--mint); color: var(--green-dk); }

.portal-wrap { max-width: 900px; margin: 0 auto; padding: 48px 20px; width: 100%; }
.portal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; flex-wrap: wrap; gap: 16px; }
.portal-header h1 { font-size: 30px; color: var(--green-dk); }
.portal-header p { font-size: 14px; color: var(--muted); }
.btn-logout {
  background: #fff; border: 1px solid var(--border-bright); color: var(--ink);
  padding: 10px 20px; border-radius: 999px; font-size: 13.5px; font-weight: 600;
  cursor: pointer; font-family: 'Inter', sans-serif;
}
.btn-logout:hover { border-color: var(--green); color: var(--green-dk); }

.invoice-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid var(--border); }
.invoice-table th { background: var(--green-dk); color: #fff; text-align: left; font-size: 12px; letter-spacing: 0.04em; text-transform: uppercase; padding: 14px 16px; }
.invoice-table td { padding: 14px 16px; font-size: 14px; border-top: 1px solid var(--border); }
.status-pill { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.status-Paid { background: var(--mint); color: var(--green-dk); }
.status-Pending { background: #FFF6E0; color: #6b4c00; }
.status-Overdue { background: var(--danger-bg); color: var(--danger); }
.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); background: #fff; border-radius: 12px; border: 1px solid var(--border); }
.loading-state { text-align: center; padding: 60px 20px; color: var(--muted); }

.admin-wrap { max-width: 1040px; margin: 0 auto; padding: 48px 20px; width: 100%; }
.admin-section { background: #fff; border-radius: 12px; border: 1px solid var(--border); padding: 28px; margin-bottom: 28px; }
.admin-section h2 { font-size: 19px; color: var(--green-dk); margin-bottom: 18px; }
.admin-form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.admin-form-grid .full { grid-column: 1 / -1; }
select.form-input { appearance: none; background-color: #fff; }
.invoice-table select.form-input { padding: 8px 10px; font-size: 13px; border-radius: 6px; }
.invoice-table td.customer-cell { line-height: 1.4; }
.invoice-table td.customer-cell .email { display: block; font-size: 12px; color: var(--muted); }
.btn-delete {
  background: var(--danger-bg); color: var(--danger); border: none;
  padding: 7px 14px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
  cursor: pointer; font-family: 'Inter', sans-serif;
}
.btn-delete:hover { opacity: 0.85; }
@media (max-width: 640px) {
  .admin-form-grid { grid-template-columns: 1fr; }
}