/* ==========================================================================
   UK Stamp Duty Calculator — shared styles
   ========================================================================== */

:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1a1d21;
  --text-secondary: #4b5563;
  --muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --accent: #1f4ed8;
  --accent-hover: #1a42b8;
  --accent-soft: #eef2ff;
  --success: #047857;
  --warning: #b45309;
  --warning-soft: #fef3c7;
  --row-alt: #fafbfc;
  --max-width: 1100px;
  --content-width: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

/* ----- Header / Nav ----- */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.logo:hover { text-decoration: none; }

.logo-mark {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 3px 7px;
  border-radius: 5px;
  margin-right: 6px;
  font-size: 13px;
}

nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
}

nav.main-nav a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: 6px;
  font-weight: 500;
}

nav.main-nav a:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

nav.main-nav a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 14px;
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  nav.main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
  }
  nav.main-nav.open { display: block; }
  nav.main-nav ul { flex-direction: column; gap: 2px; }
  nav.main-nav a { padding: 10px 12px; }
}

/* ----- Page layout ----- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 20px 48px 20px;
}

.content {
  max-width: var(--content-width);
  margin: 0 auto;
}

.page-title {
  text-align: center;
  margin-bottom: 28px;
}

.page-title h1 {
  font-size: 32px;
  font-weight: 700;
  margin: 0 0 8px 0;
  letter-spacing: -0.02em;
}

.page-title p {
  color: var(--muted);
  font-size: 15px;
  margin: 0;
}

/* ----- Cards ----- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  margin-bottom: 20px;
}

.card h2:first-child,
.card h3:first-child { margin-top: 0; }

/* ----- Typography ----- */
h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 32px 0 12px 0;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 24px 0 8px 0;
}

p { margin: 0 0 14px 0; }

p:last-child { margin-bottom: 0; }

ul, ol {
  margin: 0 0 14px 0;
  padding-left: 22px;
}

li { margin-bottom: 6px; }

.lead {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ----- Form / inputs ----- */
.field { margin-bottom: 20px; }
.field:last-child { margin-bottom: 0; }

label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text);
}

.price-input {
  position: relative;
}

.price-input::before {
  content: "£";
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 16px;
  pointer-events: none;
}

input[type="text"], input[type="email"] {
  width: 100%;
  padding: 12px 14px 12px 28px;
  font-size: 16px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-variant-numeric: tabular-nums;
  font-family: inherit;
}

input[type="text"]:focus, input[type="email"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31, 78, 216, 0.12);
}

.radio-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 8px;
}

.radio-option { position: relative; }

.radio-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.radio-option label {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 400;
  font-size: 14px;
  text-align: center;
  transition: all 0.15s;
  margin: 0;
  user-select: none;
}

.radio-option label:hover { border-color: var(--muted); }

.radio-option input:checked + label {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.radio-option input:focus-visible + label {
  box-shadow: 0 0 0 3px rgba(31, 78, 216, 0.12);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s;
  margin-top: 12px;
}

.checkbox-row:hover { border-color: var(--muted); }

.checkbox-row input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

.checkbox-row label {
  margin: 0;
  cursor: pointer;
  font-weight: 400;
  font-size: 14px;
}

/* ----- Buttons ----- */
button {
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

button:hover { border-color: var(--muted); }
button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(31, 78, 216, 0.20);
}

button.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

button.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

button.ghost {
  background: transparent;
  border-color: var(--border-strong);
}

/* ----- Calculator results ----- */
.results { display: none; }
.results.visible { display: block; }

.result-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.result-box {
  padding: 18px;
  background: var(--accent-soft);
  border-radius: 10px;
}

.result-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.result-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.result-value.accent { color: var(--accent); }

@media (max-width: 520px) {
  .result-summary { grid-template-columns: 1fr; }
  .page-title h1 { font-size: 26px; }
  .card { padding: 20px; }
}

/* ----- Tables ----- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  margin: 4px 0 8px 0;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

th {
  font-weight: 500;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

td.num, th.num { text-align: right; }

tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: var(--row-alt); }

tfoot td {
  font-weight: 600;
  border-top: 2px solid var(--border);
  border-bottom: none;
  padding-top: 12px;
}

table.rates-table {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

/* ----- Actions row ----- */
.actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
  align-items: center;
}

.copy-feedback {
  color: var(--success);
  font-size: 13px;
  opacity: 0;
  transition: opacity 0.2s;
}

.copy-feedback.visible { opacity: 1; }

/* ----- Notices / callouts ----- */
.notice {
  padding: 14px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 18px;
}

.notice.info {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
}

.notice.warning {
  background: var(--warning-soft);
  border-left: 3px solid var(--warning);
}

/* ----- FAQ accordion ----- */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}

.faq-item:first-child { padding-top: 0; }
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }

.faq-question {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 4px 0;
  list-style: none;
}

.faq-question::-webkit-details-marker { display: none; }

.faq-question::after {
  content: "+";
  color: var(--muted);
  font-size: 22px;
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.2s;
  line-height: 1;
}

details[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  margin-top: 10px;
  color: var(--text-secondary);
  font-size: 15px;
}

.faq-answer p:last-child { margin-bottom: 0; }

/* ----- Ad slots ----- */
.ad-slot {
  margin: 24px auto;
  text-align: center;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f3f4f6;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ad-slot.placeholder::before {
  content: "Advertisement";
}

.ad-slot.live { background: transparent; border: none; min-height: 0; }
.ad-slot.live::before { content: ""; }

/* ----- Footer ----- */
footer.site-footer {
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 28px 20px 24px;
  margin-top: 48px;
}

.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 32px;
}

.site-footer h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 10px 0;
  font-weight: 600;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li {
  margin-bottom: 6px;
}

.site-footer a {
  color: var(--text-secondary);
  font-size: 14px;
}

.site-footer-bottom {
  max-width: var(--max-width);
  margin: 24px auto 0;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 720px) {
  .site-footer-inner { grid-template-columns: 1fr; gap: 22px; }
  .site-footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ----- Cookie / consent banner ----- */
.consent-banner {
  position: fixed;
  bottom: 16px;
  left: 16px;
  right: 16px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
  background: var(--card);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 18px 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.10);
  z-index: 100;
  font-size: 14px;
  display: none;
}

.consent-banner.visible { display: block; }

.consent-banner h3 {
  margin: 0 0 6px 0;
  font-size: 15px;
  font-weight: 600;
}

.consent-banner p {
  margin: 0 0 14px 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.5;
}

.consent-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.consent-actions button {
  padding: 9px 14px;
  font-size: 13px;
  flex: 1;
  min-width: 100px;
}

@media (max-width: 520px) {
  .consent-banner {
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: 12px 12px 0 0;
    border-bottom: none;
    max-width: none;
  }
}

/* ----- Utilities ----- */
.muted { color: var(--muted); }
.center { text-align: center; }
.small { font-size: 13px; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 18px; }
.mb-0 { margin-bottom: 0; }