/* ===========================================================
   Calculads — Apple-inspired design system
   Monochrome (white / #F5F5F7 / near-black), color reserved
   strictly for good / neutral / poor rating signals.
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@400;500;600;700&display=swap');

:root {
  --bg: #FFFFFF;
  --section: #F5F5F7;
  --surface: #FFFFFF;
  --border: #D2D2D7;
  --border-soft: #E8E8ED;
  --ink: #1D1D1F;
  --muted: #6E6E73;
  --muted-2: #A1A1A6;

  --good: #2A7D46;
  --good-bg: #E7F3EA;
  --neutral: #B26A00;
  --neutral-bg: #FBF0DD;
  --poor: #C4372B;
  --poor-bg: #FBEAE8;

  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 980px;

  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SF Mono', monospace;

  --shadow-card: 0 1px 2px rgba(0,0,0,0.03), 0 12px 28px -14px rgba(0,0,0,0.14);
  --shadow-hover: 0 4px 10px rgba(0,0,0,0.05), 0 20px 40px -14px rgba(0,0,0,0.18);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }

/* ---------- Sticky translucent nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.75);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-soft);
}
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--ink);
}
.nav-logo .dot { color: var(--good); }
.nav-links { display: flex; gap: 30px; font-size: 13.5px; }
.nav-links a { text-decoration: none; color: #4C4C4F; transition: color 0.15s; font-weight: 600; }
.nav-links a:hover, .nav-links a.active { color: var(--ink); }

/* ---------- Container ---------- */
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 24px; }

/* ---------- Hero (Apple-style: huge centered type) ---------- */
.hero {
  text-align: center;
  padding: 84px 24px 28px;
  background: var(--bg);
  position: relative;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 auto 22px;
  max-width: 16ch;
  color: var(--ink);
}
.hero h1 .accent { color: var(--good); }
.hero p.lead {
  font-size: clamp(17px, 2vw, 21px);
  color: var(--muted);
  max-width: 46ch;
  margin: 0 auto 32px;
  line-height: 1.5;
}
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 20px; }
.scroll-cue {
  display: flex;
  justify-content: center;
  padding-top: 4px;
}
.scroll-cue svg {
  width: 20px; height: 20px;
  color: var(--muted-2);
  animation: scrollBounce 1.8s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(6px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .scroll-cue svg { animation: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
  border: 1px solid transparent;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: #3a3a3c; }
.btn-secondary { background: transparent; color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { background: var(--section); }
.btn-ghost { color: var(--ink); font-weight: 600; }
.btn-ghost .arrow { transition: transform 0.15s; display: inline-block; }
.btn-ghost:hover .arrow { transform: translateX(3px); }

/* ---------- Section wrapper (alternating bg like Apple) ---------- */
.section { padding: 64px 0; }
.section.alt { background: var(--section); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 44px; }
.section-head .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 12px;
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 3.6vw, 40px);
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
.section-head p { color: var(--muted); font-size: 16px; margin: 0; line-height: 1.55; }

/* ---------- Calculator cards grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  padding: 32px 30px 28px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--section);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
}
.card-icon svg { width: 22px; height: 22px; }

.platform-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--section);
  border: 1px solid var(--border-soft);
  color: var(--ink);
  margin: 0 auto 18px;
}
.platform-badge svg { width: 18px; height: 18px; }
.card h3 { font-family: var(--font-display); font-size: 23px; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 8px; }
.card p { font-size: 14.5px; color: var(--muted); margin: 0 0 22px; flex: 1; line-height: 1.55; }
.card-cta {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, gap 0.2s ease;
  width: fit-content;
}
.card-cta .arrow { transition: transform 0.15s; }
.card:hover .card-cta {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.card:hover .card-cta .arrow { transform: translateX(3px); }

/* ---------- Signature: benchmark strip ---------- */
.strip-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--muted-2);
  margin-bottom: 7px;
}
.strip {
  position: relative;
  height: 8px;
  border-radius: 999px;
  overflow: visible;
  display: flex;
  background: var(--border-soft);
}
.strip-seg { height: 100%; }
.strip-seg:first-child { border-radius: 999px 0 0 999px; }
.strip-seg:last-child { border-radius: 0 999px 999px 0; }
.strip-seg.poor { background: var(--poor); opacity: 0.65; }
.strip-seg.neutral { background: var(--neutral); opacity: 0.65; }
.strip-seg.good { background: var(--good); opacity: 0.65; }
.strip-marker {
  position: absolute;
  top: -4px;
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: var(--ink);
}
.strip-legend {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--muted-2);
  margin-top: 7px;
  font-family: var(--font-mono);
}

/* ---------- Disclaimer callouts ---------- */
.callout {
  background: var(--neutral-bg);
  border: 1px solid rgba(178,106,0,0.18);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}
.callout .callout-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 12px;
}
.callout .callout-head .mark {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--neutral);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.callout p { margin: 0 0 12px; }
.callout p:last-child { margin-bottom: 0; }
.callout b { color: var(--ink); }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border-soft);
  padding: 32px 0 56px;
  font-size: 13px;
  color: var(--muted-2);
  text-align: center;
}

/* ===========================================================
   Calculator page layout
   =========================================================== */
.calc-header {
  text-align: center;
  padding: 56px 24px 8px;
}
.calc-tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 16px;
}
.calc-header h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 52px);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.calc-header p {
  color: var(--muted);
  font-size: 17px;
  max-width: 56ch;
  margin: 0 auto 40px;
  line-height: 1.55;
}

.calc-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 20px;
  align-items: start;
  margin-bottom: 24px;
}
@media (max-width: 800px) { .calc-grid { grid-template-columns: 1fr; } }

.panel {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  padding: 30px 28px;
  box-shadow: var(--shadow-card);
}
.panel-title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 22px;
}

.field { margin-bottom: 18px; }
.field label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 7px;
}
.field label .hint { font-weight: 400; text-transform: none; color: var(--muted-2); font-size: 11.5px; letter-spacing: 0; }
.field-input {
  display: flex;
  align-items: center;
  background: var(--section);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 11px 15px;
  transition: border-color 0.15s, background 0.15s;
}
.field-input:focus-within { border-color: var(--ink); background: #fff; }
.field-input span { font-family: var(--font-mono); color: var(--muted-2); font-size: 15px; }
.field-input input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--ink);
  width: 100%;
  -moz-appearance: textfield;
}
.field-input input::-webkit-outer-spin-button,
.field-input input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

/* Result readout */
.result-hero { margin-bottom: 14px; }
.result-hero .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 8px;
}
.result-hero .value {
  font-family: var(--font-mono);
  font-size: clamp(46px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  transition: color 0.2s;
}
.result-hero .status { font-size: 13.5px; margin-top: 12px; line-height: 1.55; }

.rating-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  margin-top: 10px;
}
.rating-pill.good { background: var(--good-bg); color: var(--good); }
.rating-pill.neutral { background: var(--neutral-bg); color: var(--neutral); }
.rating-pill.poor { background: var(--poor-bg); color: var(--poor); }
.rating-pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--border-soft);
  font-size: 13.5px;
}
.stat-row:last-child { border-bottom: none; }
.stat-row .k { color: var(--muted); }
.stat-row .v { font-family: var(--font-mono); font-weight: 600; font-size: 15.5px; }

.mini-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 22px; }
@media (max-width: 460px) { .mini-cards { grid-template-columns: 1fr; } }
.mini-card {
  background: var(--section);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 20px 20px 18px;
}
.mini-card .label { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 9px; }
.mini-card .value { font-family: var(--font-mono); font-size: 30px; font-weight: 700; line-height: 1; margin-bottom: 8px; letter-spacing: -0.01em; }
.mini-card .sub { font-size: 11.5px; color: var(--muted-2); }

/* Benchmark reference table */
.bench-table { width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 10px; }
.bench-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  padding: 10px;
  border-bottom: 1px solid var(--border);
}
.bench-table td { padding: 14px 10px; border-bottom: 1px solid var(--border-soft); color: var(--muted); }
.bench-table td:first-child { color: var(--ink); font-weight: 600; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  padding: 4px 10px;
  border-radius: 999px;
}
.pill.good { background: var(--good-bg); color: var(--good); }
.pill.neutral { background: var(--neutral-bg); color: var(--neutral); }
.pill.poor { background: var(--poor-bg); color: var(--poor); }
.pill::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.section-title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 56px 0 8px;
}
.section-sub { color: var(--muted); font-size: 15px; margin: 0 0 20px; line-height: 1.5; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}
.back-link:hover { color: var(--ink); }

.explainer { font-size: 13px; color: var(--muted-2); line-height: 1.75; max-width: 760px; margin-top: 8px; }
.explainer b { color: var(--muted); }

.calc-footer-space { margin-top: 56px; margin-bottom: 20px; }

/* ---------- ROI banner ---------- */
.roi-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-radius: var(--radius-lg);
  padding: 22px 26px;
  margin: 22px 0;
  flex-wrap: wrap;
}
.roi-banner.good { background: var(--good-bg); }
.roi-banner.neutral { background: var(--neutral-bg); }
.roi-banner.poor { background: var(--poor-bg); }
.roi-banner .rb-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.roi-banner.good .rb-label, .roi-banner.good .rb-sub { color: var(--good); }
.roi-banner.neutral .rb-label, .roi-banner.neutral .rb-sub { color: var(--neutral); }
.roi-banner.poor .rb-label, .roi-banner.poor .rb-sub { color: var(--poor); }
.roi-banner .rb-sub { font-size: 13.5px; }
.roi-banner .rb-pct {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.roi-banner.good .rb-pct { color: var(--good); }
.roi-banner.neutral .rb-pct { color: var(--neutral); }
.roi-banner.poor .rb-pct { color: var(--poor); }

/* ---------- Key results strip ---------- */
.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 18px 0; }
@media (max-width: 640px) { .kpi-row { grid-template-columns: 1fr 1fr; } }
.kpi-box {
  background: var(--section);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.kpi-box .kpi-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 6px; }
.kpi-box .kpi-value { font-family: var(--font-mono); font-size: 21px; font-weight: 700; }

/* ---------- Financial breakdown ---------- */
.breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: 12px 2px;
  border-bottom: 1px solid var(--border-soft);
  font-size: 14px;
}
.breakdown-row:last-child { border-bottom: none; padding-top: 14px; }
.breakdown-row .bd-k { color: var(--muted); }
.breakdown-row .bd-v { font-family: var(--font-mono); font-weight: 600; }
.breakdown-row.total .bd-k { color: var(--ink); font-weight: 700; }
.breakdown-row.total .bd-v { font-size: 17px; }

/* ---------- Scenario cards ---------- */
.scenario-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 16px; }
@media (max-width: 640px) { .scenario-row { grid-template-columns: 1fr; } }
.scenario-box {
  background: var(--section);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.scenario-box .sc-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.scenario-box .sc-value { font-family: var(--font-mono); font-size: 18px; font-weight: 700; color: var(--good); }

.subhead {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin: 26px 0 4px;
}