/* ─────────────────────────────────────────
   FONTS
───────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700&family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;1,400&display=swap');

/* ─────────────────────────────────────────
   CSS VARIABLES
───────────────────────────────────────── */
:root {
  --ink:        #0e1117;
  --ink-mid:    #3b4454;
  --ink-muted:  #7c8799;
  --bg:         #f8f9fc;
  --bg-alt:     #eef0f6;
  --white:      #ffffff;
  --border:     #dde1ec;
  --blue:       #1a56db;
  --blue-lt:    #2563eb;
  --blue-bg:    #eff4ff;
  --amber:      #b45309;
  --amber-bg:   #fffbeb;
  --green:      #0f7c4a;
  --green-bg:   #ecfdf5;
  --red:        #c0392b;
  --red-bg:     #fef2f2;
  --offer-a:    #1a56db;
  --offer-b:    #7c3aed;
  --shadow-sm:  0 1px 2px rgba(14,17,23,0.06);
  --shadow:     0 2px 8px rgba(14,17,23,0.08), 0 0 1px rgba(14,17,23,0.04);
  --radius:     8px;
  --radius-sm:  5px;
  --font-head:  'Syne', system-ui, sans-serif;
  --font-body:  'IBM Plex Sans', system-ui, sans-serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;
}

/* ─────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─────────────────────────────────────────
   COLLAPSE UTILITY
───────────────────────────────────────── */
.is-off { display: none !important; }
.is-on  { display: block; }

/* ─────────────────────────────────────────
   AD SLOTS
───────────────────────────────────────── */
.ad-slot {
  width: 100%;
  text-align: center;
  background: transparent;
}
.ad-slot-top,
.ad-slot-bottom {
  display: block;
}

.sponsor-bar {
  background: var(--amber-bg);
  border: 1px solid #fcd34d;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--amber);
  margin: 12px 0;
}

/* ─────────────────────────────────────────
   LAYOUT
───────────────────────────────────────── */
.page-wrap { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }
.container { width: 100%; max-width: 940px; margin: 0 auto; padding: 0 20px; }

/* ─────────────────────────────────────────
   HEADER
───────────────────────────────────────── */
.site-header {
  background: var(--ink);
  padding: 14px 0;
  border-bottom: 3px solid var(--blue);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.site-logo {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}
.site-logo span { color: #7dd3fc; }
.site-tagline {
  font-size: 0.73rem;
  color: #64748b;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ─────────────────────────────────────────
   HERO
───────────────────────────────────────── */
.tool-hero {
  background: var(--ink);
  padding: 44px 0 38px;
}
.tool-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 12px;
}
.tool-hero p {
  color: #94a3b8;
  font-size: 0.97rem;
  max-width: 540px;
  font-weight: 300;
}
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 20px;
  background: rgba(125,211,252,0.1);
  border: 1px solid rgba(125,211,252,0.25);
  color: #7dd3fc;
}

/* ─────────────────────────────────────────
   OFFER GRID
───────────────────────────────────────── */
.offer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 32px 0 0;
}
@media (max-width: 680px) {
  .offer-grid { grid-template-columns: 1fr; }
}

.offer-card {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.offer-card.offer-a { border-top-color: var(--offer-a); }
.offer-card.offer-b { border-top-color: var(--offer-b); }

.offer-header {
  padding: 14px 20px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border);
}
.offer-tag {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 10px;
  border-radius: 20px;
}
.offer-a .offer-tag { background: var(--blue-bg); color: var(--offer-a); }
.offer-b .offer-tag { background: #f5f3ff; color: var(--offer-b); }
.offer-header-label {
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-mid);
}

.offer-body { padding: 20px; }

/* ─────────────────────────────────────────
   FORM FIELDS
───────────────────────────────────────── */
.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 14px;
}
.field:last-child { margin-bottom: 0; }

label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-mid);
  letter-spacing: 0.01em;
}
label .req { color: var(--blue); margin-left: 2px; }
label .opt { font-size: 0.72rem; font-weight: 400; color: var(--ink-muted); }

.input-prefix { position: relative; }
.input-prefix::before {
  content: "$";
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  pointer-events: none;
}
.input-prefix input { padding-left: 22px; }

.pct-suffix { position: relative; }
.pct-suffix::after {
  content: "%";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  pointer-events: none;
}
.pct-suffix input { padding-right: 28px; }

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 9px 11px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}
select {
  font-family: var(--font-body);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237c8799' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}
input:focus, select:focus {
  border-color: var(--blue-lt);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
  background: var(--white);
}
input.input-error { border-color: var(--red); box-shadow: 0 0 0 3px rgba(192,57,43,0.08); }

.field-hint { font-size: 0.72rem; color: var(--ink-muted); line-height: 1.4; }
.field-error { font-size: 0.72rem; color: var(--red); min-height: 0.9em; }

.section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 18px 0 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--bg-alt);
}
.section-label:first-child { margin-top: 0; }

/* ─────────────────────────────────────────
   HORIZON + SUBMIT ROW
───────────────────────────────────────── */
.controls-row {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin: 24px 0 0;
  flex-wrap: wrap;
}
.horizon-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.horizon-field label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--ink-mid);
}
.horizon-field select { width: 180px; }

.btn-primary {
  flex: 1;
  min-width: 180px;
  background: var(--blue);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 11px 24px;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: background 0.15s, transform 0.1s;
}
.btn-primary:hover { background: var(--blue-lt); }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  background: transparent;
  color: var(--ink-mid);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 11px 18px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  cursor: pointer;
  transition: border-color 0.15s;
}
.btn-secondary:hover { border-color: var(--ink-mid); color: var(--ink); }

/* ─────────────────────────────────────────
   RESULTS
───────────────────────────────────────── */
#results { margin: 28px 0 40px; }

.results-title {
  font-family: var(--font-head);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--ink);
}

/* Winner box */
.winner-box {
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 22px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}
.winner-box::before {
  content: "▶";
  font-size: 0.75rem;
}
.winner-a  { background: var(--blue-bg); color: var(--offer-a); border: 1px solid #bfdbfe; }
.winner-b  { background: #f5f3ff; color: var(--offer-b); border: 1px solid #ddd6fe; }
.winner-close { background: var(--amber-bg); color: var(--amber); border: 1px solid #fde68a; }

/* Summary cards */
.summary-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 22px;
}
@media (max-width: 540px) { .summary-row { grid-template-columns: 1fr; } }

.summary-block {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.summary-block.block-a { border-top-color: var(--offer-a); }
.summary-block.block-b { border-top-color: var(--offer-b); }

.summary-block-header {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}
.block-a .summary-block-header { color: var(--offer-a); }
.block-b .summary-block-header { color: var(--offer-b); }

.summary-metrics { padding: 14px 16px; display: grid; gap: 10px; }

.metric { display: flex; flex-direction: column; gap: 2px; }
.metric-label {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.metric-value {
  font-family: var(--font-mono);
  font-size: 1.22rem;
  font-weight: 500;
  color: var(--ink);
}
.metric-value.primary { font-size: 1.45rem; }

/* Year-by-year table */
.table-wrap {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.table-wrap h3 {
  font-family: var(--font-head);
  font-size: 0.95rem;
  padding: 12px 16px;
  background: var(--ink);
  color: #fff;
  letter-spacing: 0.01em;
}
table { width: 100%; border-collapse: collapse; }
thead th {
  background: var(--bg-alt);
  padding: 9px 14px;
  text-align: left;
  font-size: 0.68rem;
  font-family: var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--border);
}
thead th.col-a { color: var(--offer-a); }
thead th.col-b { color: var(--offer-b); }

tbody tr { border-bottom: 1px solid var(--bg-alt); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg); }
td { padding: 10px 14px; font-size: 0.88rem; color: var(--ink); }
td.mono { font-family: var(--font-mono); }
td.lead-a { color: var(--offer-a); font-weight: 500; }
td.lead-b { color: var(--offer-b); font-weight: 500; }

tr.totals-row { background: var(--bg-alt); border-top: 2px solid var(--border); }
tr.totals-row td { font-weight: 600; font-family: var(--font-mono); font-size: 0.9rem; }

/* Disclaimer */
.disclaimer {
  font-size: 0.78rem;
  color: var(--ink-muted);
  background: var(--bg-alt);
  border-left: 3px solid var(--border);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

/* ─────────────────────────────────────────
   INFO PAGES
───────────────────────────────────────── */
.info-hero {
  background: var(--ink);
  padding: 40px 0 32px;
}
.info-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.info-hero p { color: #94a3b8; font-size: 0.93rem; font-weight: 300; }

.info-body { padding: 40px 0; }

.info-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.info-card h2 {
  font-family: var(--font-head);
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  color: var(--ink);
}
.info-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 16px 0 6px;
  color: var(--ink);
}
.info-card p {
  font-size: 0.88rem;
  color: var(--ink-mid);
  margin-bottom: 10px;
  line-height: 1.7;
}
.info-card p:last-child { margin-bottom: 0; }
.info-card ul { list-style: disc; padding-left: 18px; margin-bottom: 10px; }
.info-card ul li { font-size: 0.88rem; color: var(--ink-mid); margin-bottom: 5px; line-height: 1.6; }
.info-card a { color: var(--blue); }

.faq-item { border-bottom: 1px solid var(--bg-alt); padding: 14px 0; }
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-item h3 { font-size: 0.9rem; font-weight: 600; margin: 0 0 7px; }
.faq-item p { margin-bottom: 0; }

.contact-email-block {
  background: var(--blue-bg);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 16px;
}
.contact-email-block .email-label {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 3px;
}
.contact-email-block a {
  font-family: var(--font-mono);
  font-size: 0.93rem;
  color: var(--blue);
  font-weight: 500;
}
.contact-note { font-size: 0.8rem; color: var(--ink-muted); line-height: 1.6; }

/* ─────────────────────────────────────────
   FOOTER
───────────────────────────────────────── */
.site-footer {
  background: var(--ink);
  color: #64748b;
  padding: 36px 0 22px;
  margin-top: 40px;
  font-size: 0.83rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; gap: 20px; } }

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #334155;
  margin-bottom: 10px;
}
.footer-col a {
  display: block;
  color: #64748b;
  margin-bottom: 6px;
  font-size: 0.82rem;
  transition: color 0.15s;
}
.footer-col a:hover { color: #7dd3fc; text-decoration: none; }
.footer-col p { line-height: 1.6; }

#network-links a {
  display: block;
  color: #64748b;
  margin-bottom: 6px;
  font-size: 0.8rem;
  transition: color 0.15s;
}
#network-links a:hover { color: #7dd3fc; text-decoration: none; }

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: #334155;
}
.footer-bottom a { color: #334155; }
.footer-bottom a:hover { color: #64748b; text-decoration: none; }