:root {
  --color-primary:          #76E1FF;
  --color-primary-dark:     #00708F;
  --color-primary-darker:   #004E5E;
  --color-tertiary:         #3F863A;

  --color-bg:               #FFFFFF;
  --color-surface:          #D8EDF5;
  --color-surface-variant:  #E3F9FF;
  --color-surface-container:#EFF4F7;

  --color-text:             #171C1E;
  --color-text-muted:       #40484B;

  --color-error:            #904B3E;
  --color-error-bg:         #FFDAD4;
  --color-outline:          #70787C;
  --color-outline-subtle:   #BFC8CB;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-surface-container);
  color: var(--color-text);
  margin: 0;
  min-height: 100vh;
}

/* ── Header ── */
.site-header {
  background: var(--color-surface);
  padding: 0.625rem 1.5rem;
  border-bottom: 2px solid var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.site-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  flex-shrink: 0;
}

.site-header .brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary-darker);
  letter-spacing: -0.01em;
}

/* ── Card ── */
.card {
  background: var(--color-bg);
  max-width: 480px;
  margin: 2.5rem auto;
  padding: 2rem;
  border-radius: 8px;
  border: 1px solid var(--color-outline-subtle);
}

/* ── Typography ── */
h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-darker);
  margin: 0 0 0.375rem;
}

h2 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 1.75rem 0 0;
}

p {
  color: var(--color-text-muted);
  margin: 0.25rem 0 0.75rem;
  line-height: 1.5;
}

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

/* ── Form ── */
label {
  display: block;
  margin-top: 1rem;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text);
}

input[type=text],
input[type=email],
input[type=password] {
  width: 100%;
  padding: 0.625rem 0.75rem;
  margin-top: 0.25rem;
  border: 1.5px solid var(--color-outline-subtle);
  border-radius: 6px;
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color 0.15s;
}

input[type=text]:focus,
input[type=email]:focus,
input[type=password]:focus {
  outline: none;
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 0 3px rgba(118, 225, 255, 0.4);
}

small {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

button[type=submit] {
  margin-top: 1.5rem;
  width: 100%;
  padding: 0.75rem;
  background: var(--color-primary-dark);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

button[type=submit]:hover  { background: var(--color-primary-darker); }
button[type=submit]:focus  { outline: none; box-shadow: 0 0 0 3px rgba(118, 225, 255, 0.5); }

/* ── Wide card (shopfront landing) ── */
.card--wide {
  max-width: 760px;
}

/* ── Option grid ── */
.option-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.option-grid--single {
  grid-template-columns: 1fr;
  max-width: 360px;
}

@media (max-width: 600px) {
  .option-grid { grid-template-columns: 1fr; }
  .card--wide  { max-width: 480px; }
}

.option-card {
  border: 1.5px solid var(--color-outline-subtle);
  border-radius: 8px;
  padding: 1.5rem;
  background: var(--color-surface-variant);
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.option-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary-darker);
  margin: 0;
  text-transform: none;
  letter-spacing: normal;
}

.option-card .price {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text);
}

.option-card .price span {
  font-size: 0.9375rem;
  font-weight: 400;
}

.option-card p {
  margin: 0;
  flex: 1;
  font-size: 0.9375rem;
}

.option-card ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ── Buttons (link-style, for option cards) ── */
.btn {
  display: block;
  text-align: center;
  padding: 0.75rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: auto;
}

.btn-primary {
  background: var(--color-primary-dark);
  color: #fff;
  border: none;
}
.btn-primary:hover { background: var(--color-primary-darker); color: #fff; }

.btn-secondary {
  background: transparent;
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary-dark);
}
.btn-secondary:hover { background: var(--color-surface); color: var(--color-primary-darker); }

/* ── Order summary (checkout) ── */
.order-summary {
  background: var(--color-surface-variant);
  border: 1px solid var(--color-outline-subtle);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.75rem;
}

.order-summary h2 {
  margin: 0 0 0.875rem;
}

.order-summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.order-summary-table td {
  padding: 0.375rem 0;
  color: var(--color-text);
}

.order-summary-table td.amount {
  text-align: right;
  white-space: nowrap;
  padding-left: 1rem;
}

.order-summary-table tr + tr td {
  border-top: 1px solid var(--color-outline-subtle);
}

.discount-row td {
  color: var(--color-tertiary);
  font-size: 0.875rem;
}

.total-row td {
  padding-top: 0.625rem !important;
  border-top: 2px solid var(--color-outline-subtle) !important;
  font-size: 1rem;
}

.tax-note,
.charge-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0.625rem 0 0;
  line-height: 1.4;
}

/* ── Feedback ── */
.field-error {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--color-error);
}

.field-ok {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--color-tertiary);
}

.error-banner {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error);
  color: var(--color-error);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  border-radius: 6px;
  font-size: 0.9375rem;
}