:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-input: #12141c;
  --border: #2a2d3a;
  --border-light: #23263a;
  --text: #e4e6ed;
  --text-dim: #8b8fa3;
  --accent: #4f8cff;
  --accent-hover: #6da0ff;
  --danger: #ef4444;
  --shadow: rgba(0,0,0,0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.hidden { display: none !important; }

/* Login */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.login-card h1 { font-size: 22px; margin-bottom: 8px; }
.login-card p { color: var(--text-dim); margin-bottom: 24px; font-size: 14px; }

.login-card input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-input);
  color: var(--text);
  font-size: 15px;
  margin-bottom: 16px;
}

.login-card input:focus { outline: none; border-color: var(--accent); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 9px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-sm { padding: 4px 10px; font-size: 12px; background: var(--border); color: var(--text-dim); border-radius: 6px; }
.btn-sm:hover { background: var(--border-light); color: var(--text); }

.btn-danger { background: var(--danger); color: #fff; }

.error-message { color: var(--danger); font-size: 13px; margin-top: 8px; }
.loading { color: var(--text-dim); padding: 20px 0; text-align: center; }

/* Layout */
header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

header h1 { font-size: 18px; font-weight: 600; }

main { padding: 24px; max-width: 800px; margin: 0 auto; }

/* Form */
.calc-form { display: flex; flex-direction: column; gap: 0; }

.form-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
}

.form-section h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.form-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.form-row:last-child { margin-bottom: 0; }

.field { flex: 1; min-width: 0; }
.field.sm { flex: 0 0 110px; }
.field.xs { flex: 0 0 65px; }
.field.flex-2 { flex: 2; }

.field label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.field input,
.field select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-input);
  color: var(--text);
  font-size: 13px;
}

.field input:focus,
.field select:focus { outline: none; border-color: var(--accent); }

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] { accent-color: var(--accent); }

.package-row, .commodity-row { margin-bottom: 6px; }
.package-row .form-row, .commodity-row .form-row { margin-bottom: 0; }

.customs-footer {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  font-weight: 500;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  align-items: flex-end;
  gap: 12px;
  margin-top: 4px;
}

/* Results */
.results { margin-top: 24px; }
.results h3 { font-size: 15px; font-weight: 600; margin-bottom: 14px; }

.address-type {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--border);
  color: var(--text-dim);
  text-transform: capitalize;
}

.rate-list { display: flex; flex-direction: column; gap: 8px; }

.rate-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  flex-wrap: wrap;
}

.carrier-logo { width: 32px; height: 32px; object-fit: contain; flex-shrink: 0; }

.rate-info { flex: 1; min-width: 0; }

.rate-service {
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.rate-delivery { font-size: 12px; color: var(--text-dim); margin-top: 2px; }

.rate-price {
  font-size: 16px;
  font-weight: 600;
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

/* Badges */
.badge {
  font-size: 10px;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 4px;
}

.badge-account { background: #1e3a5f; color: #7eb8ff; }
.badge-shippo { background: #3a1e5f; color: #b87eff; }
.badge-guaranteed { background: #1e5f3a; color: #7effb8; }

/* View Details */
.btn-details {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
  color: var(--text-dim);
  cursor: pointer;
}

.btn-details:hover { background: var(--bg-input); color: var(--text); }

.charge-details {
  width: 100%;
  padding: 10px 14px 4px 56px;
  border-top: 1px solid var(--border-light);
  margin-top: 8px;
}

.detail-row {
  display: flex;
  justify-content: space-between;
  padding: 2px 0;
  font-size: 12px;
  color: var(--text-dim);
  max-width: 300px;
}

.detail-row.detail-info { font-style: italic; font-size: 11px; }

/* Responsive */
@media (max-width: 600px) {
  main { padding: 16px; }
  .form-section { padding: 14px; }
  .form-row { flex-wrap: wrap; gap: 8px; }
  .field.sm { flex: 0 0 calc(50% - 4px); }
  .field.xs { flex: 0 0 60px; }
  .rate-card { padding: 10px 12px; }
  .charge-details { padding-left: 12px; }
}