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

:root {
  --ink: #111;
  --paper: #f5f2eb;
  --rule: #111;
  --muted: #777;
  --accent: #c8392b;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
  padding: 0 0 6rem;
}

/* ── MASTHEAD ── */
.masthead {
  border-bottom: 3px solid var(--ink);
  padding: 1.2rem 2rem .8rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

a.masthead-brand {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1;
  text-decoration: none;
  color: var(--ink);
}

a.masthead-brand span { color: var(--accent); }

.masthead-meta {
  font-family: 'Space Mono', monospace;
  font-size: .65rem;
  color: var(--muted);
  text-align: right;
  line-height: 1.6;
}

/* ── LANG STRIP ── */
.lang-strip {
  border-bottom: 1px solid var(--ink);
  padding: .4rem 2rem;
  display: flex;
  gap: 0;
}

a.lang-btn {
  background: none;
  border: none;
  font-family: 'Space Mono', monospace;
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
  color: var(--muted);
  padding: 0 .8rem 0 0;
  text-decoration: none;
  transition: color .15s;
}

a.lang-btn.active { color: var(--ink); font-style: italic; }
a.lang-btn:hover { color: var(--ink); }

/* ── LAYOUT ── */
.page {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── HEADLINE ── */
.headline-block {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--ink);
}

.kicker {
  font-family: 'Space Mono', monospace;
  font-size: .65rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .6rem;
}

.headline {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.8rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: .95;
  letter-spacing: -.03em;
}

.headline em {
  font-style: italic;
  color: var(--accent);
}

.subhead {
  font-size: .9rem;
  color: var(--muted);
  margin-top: 1rem;
  font-weight: 300;
  max-width: 420px;
  line-height: 1.6;
}

/* ── FORM GRID ── */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid var(--ink);
}

.form-col {
  padding: 2rem 0;
}

.form-col:first-child {
  padding-right: 2.5rem;
  border-right: 1px solid var(--ink);
}

.form-col:last-child {
  padding-left: 2.5rem;
}

.field-label {
  font-family: 'Space Mono', monospace;
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .8rem;
}

.date-row {
  display: flex;
  align-items: baseline;
  gap: .5rem;
}

.date-row span {
  font-family: 'Playfair Display', serif;
  font-size: 1.4rem;
  color: #ccc;
}

input[type="number"] {
  -moz-appearance: textfield;
  appearance: none;
  background: none;
  border: none;
  border-bottom: 2px solid var(--ink);
  font-family: 'Playfair Display', serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ink);
  width: 3.2ch;
  padding: .1rem 0 .2rem;
  text-align: center;
  transition: border-color .15s;
  outline: none;
}

input[type="number"]:focus { border-color: var(--accent); }
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }
input[type="number"]#year,
input[type="number"]#y1,
input[type="number"]#y2,
input[type="number"]#rYear { width: 5ch; }
input[type="number"]::placeholder { color: #ccc; }

/* select (date-calculator op row) */
select {
  background: none;
  border: none;
  border-bottom: 2px solid var(--ink);
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
  padding: .1rem .2rem .2rem;
  cursor: pointer;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

select:focus { border-color: var(--accent); }

.op-row {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  flex-wrap: wrap;
}

#opAmount {
  width: 4ch;
}

/* Ref toggle */
.ref-toggle-row {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-top: 1.4rem;
  font-size: .8rem;
  color: var(--muted);
  cursor: pointer;
}

.ref-toggle-row input[type="checkbox"] {
  accent-color: var(--accent);
  width: 14px; height: 14px;
  cursor: pointer;
}

.ref-fields { margin-top: 1.2rem; display: none; }
.ref-fields.show { display: block; }

/* Button */
.calc-btn {
  margin-top: 1.6rem;
  background: var(--ink);
  color: var(--paper);
  border: none;
  font-family: 'Space Mono', monospace;
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: .75rem 2rem;
  cursor: pointer;
  transition: background .15s, color .15s;
}

.calc-btn:hover { background: var(--accent); }

/* Tip column */
.tip-text {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-style: italic;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.example-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.example-list li {
  font-size: .8rem;
  color: var(--muted);
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
  line-height: 1.4;
  cursor: pointer;
  transition: color .15s;
}

.example-list li:hover { color: var(--ink); }

/* Auto-info column (week-number, what-day, christmas) */
.auto-info {
  padding: 1.5rem 0;
}

.auto-info p {
  font-size: .85rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

/* ── RESULTS ── */
.results-section {
  display: none;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--ink);
  animation: fadeIn .4s ease;
}

.results-section.show,
.results-section.auto-show { display: block; }

.results-header {
  font-family: 'Space Mono', monospace;
  font-size: .62rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.age-display {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.age-number {
  font-family: 'Playfair Display', serif;
  font-size: clamp(5rem, 18vw, 10rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--ink);
}

.age-suffix {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-style: italic;
  color: var(--muted);
  padding-bottom: .5rem;
}

/* Live precise age / countdown */
.precise-age {
  font-family: 'Space Mono', monospace;
  font-size: clamp(.75rem, 2vw, 1rem);
  color: var(--muted);
  margin: -.8rem 0 1.8rem;
  letter-spacing: .04em;
  min-height: 1.4em;
}

/* Result date display (date-calc) */
.result-date {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.6rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.result-date-sub {
  font-family: 'Space Mono', monospace;
  font-size: .75rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

/* Stats strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  margin-bottom: 2rem;
}

.stats-strip.cols-3 { grid-template-columns: repeat(3, 1fr); }

.stat-item {
  padding: 1.2rem 0;
  border-right: 1px solid var(--ink);
}

.stat-item:last-child { border-right: none; }
.stat-item:not(:first-child) { padding-left: 1.2rem; }

.stat-num {
  font-family: 'Space Mono', monospace;
  font-size: clamp(.95rem, 2.5vw, 1.25rem);
  color: var(--ink);
  line-height: 1;
}

.stat-lbl {
  font-size: .7rem;
  color: var(--muted);
  margin-top: .3rem;
  letter-spacing: .05em;
  text-transform: uppercase;
}

/* Fun facts row */
.facts-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid #ddd;
}

.fact-item {
  flex: 1 1 auto;
  min-width: 160px;
  padding: 1rem 1.2rem 1rem 0;
  border-right: 1px solid #ddd;
  margin-right: -1px;
}

.fact-item:last-child { border-right: none; }

.fact-key {
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: .25rem;
}

.fact-val {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

/* Birthday / info banner */
.bday-banner {
  margin-top: 1.5rem;
  border-left: 3px solid var(--accent);
  padding: .6rem 1rem;
  font-family: 'Playfair Display', serif;
  font-size: 1rem;
  font-style: italic;
  color: var(--ink);
}

/* Error */
.error-line {
  font-family: 'Space Mono', monospace;
  font-size: .75rem;
  color: var(--accent);
  margin-top: 1rem;
  display: none;
}
.error-line.show { display: block; }

/* ── TOOL NAV ── */
.tool-nav {
  padding: 1.4rem 0 1rem;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid #ddd;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.nav-group {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  align-items: start;
}

.nav-cat {
  font-family: 'Space Mono', monospace;
  font-size: .58rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: right;
  padding: .25rem .9rem 0 0;
  border-right: 1px solid #d5d1c8;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .1rem;
  padding-left: .6rem;
}

.nav-links a {
  font-size: .82rem;
  text-decoration: none;
  color: var(--ink);
  padding: .18rem .5rem;
  border-radius: 2px;
  transition: background .12s, color .12s;
  white-space: nowrap;
}

.nav-links a:hover { background: var(--ink); color: var(--paper); }
.nav-links a[aria-current="page"] { background: var(--accent); color: #fff; font-weight: 500; }

.nav-sep {
  color: #c8c4bb;
  font-size: .72rem;
  user-select: none;
  padding: 0 .05rem;
}

@media (max-width: 520px) {
  .nav-group { grid-template-columns: 1fr; }
  .nav-cat { text-align: left; border-right: none; border-bottom: 1px solid #d5d1c8; padding: 0 0 .2rem; margin-bottom: .2rem; }
  .nav-links { padding-left: 0; }
}

/* ── WORLD WHEN BORN ── */
.world-when {
  margin: 2rem 0 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 1.6rem 0 1.2rem;
}

.world-when-title {
  font-family: 'Space Mono', monospace;
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
  margin-bottom: 1.4rem;
}

.world-row {
  display: grid;
  grid-template-columns: 2rem 4.5rem 1fr;
  align-items: baseline;
  gap: .2rem .5rem;
  margin-bottom: .75rem;
  line-height: 1.5;
}

.world-icon { text-align: center; font-size: 1rem; }

.world-lbl {
  font-family: 'Space Mono', monospace;
  font-size: .58rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: .15rem;
}

.world-val {
  font-family: 'Playfair Display', serif;
  font-size: .95rem;
  color: var(--ink);
}

@media (max-width: 480px) {
  .world-row { grid-template-columns: 1.6rem 3.8rem 1fr; }
  .world-val { font-size: .88rem; }
}

/* ── SEO BLOCK ── */
.seo-block {
  padding: 2rem 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  border-bottom: 1px solid var(--ink);
}

.seo-block h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: .75rem;
  line-height: 1.2;
}

.seo-block p {
  font-size: .875rem;
  color: var(--muted);
  line-height: 1.75;
}

/* FAQ */
.faq-block {
  padding: 2rem 0;
  border-bottom: 1px solid var(--ink);
}

.faq-block h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.faq-item {
  border-top: 1px solid #ddd;
  padding: 1rem 0;
}

.faq-item h3 {
  font-family: 'Space Mono', monospace;
  font-size: .8rem;
  font-weight: 400;
  letter-spacing: .05em;
  margin-bottom: .5rem;
  color: var(--ink);
}

.faq-item p {
  font-size: .875rem;
  color: var(--muted);
  line-height: 1.75;
}

/* ── SOURCE BLOCK ── */
.source-block {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding: .6rem 0 1rem;
  border-top: 1px solid #ddd;
}

.source-lbl {
  font-family: 'Space Mono', monospace;
  font-size: .58rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  flex-shrink: 0;
}

.source-block a {
  font-size: .8rem;
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: #ccc;
  transition: color .15s;
}

.source-block a:hover { color: var(--accent); }

/* ── FOOTER ── */
footer {
  padding: 1rem 0 0;
  font-family: 'Space Mono', monospace;
  font-size: .6rem;
  color: var(--muted);
  letter-spacing: .05em;
}

/* ── ANIMATIONS ── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .masthead { padding: 1rem; }
  .page { padding: 0 1rem; }
  .form-grid { grid-template-columns: 1fr; }
  .form-col:first-child { border-right: none; padding-right: 0; border-bottom: 1px solid var(--ink); }
  .form-col:last-child { padding-left: 0; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-right: 1px solid var(--ink); }
  .seo-block { grid-template-columns: 1fr; gap: 1.5rem; }
  input[type="number"] { font-size: 1.5rem; }
}