* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background: linear-gradient(135deg, #1e1e2f, #2b2b40);
  color: #fff;
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

.container {
  max-width: 1060px;
  margin: 40px auto;
  padding: 20px;
}

h1 {
  text-align: center;
  margin-bottom: 5px;
  font-size: 26px;
}

.subtitle {
  text-align: center;
  color: #aaa;
  margin-bottom: 25px;
  font-size: 14px;
}

/* Top input card — centered, narrow */
.card {
  background: #1f2033;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.card:first-of-type {
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Bottom row: two cards side by side */
.bottom-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: start;
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  font-size: 13px;
  margin-bottom: 6px;
  color: #ccc;
}

textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #2e3050;
  background: #2a2d45;
  color: #fff;
  font-size: 13px;
  font-family: 'Courier New', monospace;
  outline: none;
  resize: vertical;
  line-height: 1.5;
  transition: border-color 0.2s;
}

textarea:focus {
  border-color: #4f46e5;
}

textarea::placeholder {
  color: #555;
}

.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 8px;
}

button {
  width: 100%;
  padding: 11px;
  background: #4f46e5;
  border: none;
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background: #4338ca;
}

button.secondary {
  background: #2e3050;
}

button.secondary:hover {
  background: #374169;
}

.error {
  display: none;
  margin-top: 12px;
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
}

/* Result breakdown card */

.result-card,
.copy-card {
  padding: 22px;
}

.result-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.result-icon {
  font-size: 20px;
}

.result-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.result-intro {
  font-size: 12px;
  color: #aaa;
  line-height: 1.6;
  margin: 0 0 14px;
  padding: 10px 12px;
  background: #2a2d45;
  border-radius: 8px;
  border-left: 3px solid #4f46e5;
}

.section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #666;
  margin: 0 0 6px;
}

.value-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 0;
  font-size: 13px;
  border-bottom: 1px solid #2a2d45;
}

.value-row:last-of-type {
  border-bottom: none;
}

.vr-label {
  color: #bbb;
}

.vr-value {
  font-weight: 600;
  color: #fff;
}

.total-row .vr-label {
  color: #ddd;
  font-weight: 600;
}

.divider {
  height: 1px;
  background: #2e3050;
  margin: 10px 0;
}

.cashback-highlight {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(135deg, #312e81, #3730a3);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 14px 0 12px;
}

.cb-label {
  font-size: 14px;
  font-weight: 600;
  color: #c7d2fe;
}

.cb-value {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.cb-value.zero {
  color: #a5b4fc;
}

.cb-value.positive {
  color: #86efac;
}

.result-footer {
  font-size: 11px;
  color: #666;
  line-height: 1.6;
  margin: 4px 0 0;
}

.result-footer a {
  color: #818cf8;
  text-decoration: none;
}

.result-footer a:hover {
  text-decoration: underline;
}

/* Copy card */

.copy-card textarea {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 13px;
  color: #ddd;
  margin-top: 10px;
  line-height: 1.65;
}

.copy-btn {
  margin-top: 12px;
  background: #059669;
}

.copy-btn:hover {
  background: #047857;
}

.copy-feedback {
  display: none;
  margin-top: 8px;
  font-size: 13px;
  color: #86efac;
  text-align: center;
}

/* Responsive: stack on small screens */
@media (max-width: 720px) {
  .bottom-row {
    grid-template-columns: 1fr;
  }

  .btn-row {
    grid-template-columns: 1fr;
  }
}