:root {
  --ink: #0b1f33;
  --ink-soft: #14384b;
  --teal: #0e7c86;
  --teal-deep: #0a6570;
  --mint: #2a9d8f;
  --mint-light: #8ed7d2;
  --coral: #e76f51;
  --amber: #e9c46a;
  --orange: #f4a261;
  --cream: #f7f5f0;
  --paper: #ffffff;
  --muted: #61717b;
  --muted-dark: #4b5e69;
  --line: #e1e6e9;
  --line-strong: #d2dade;
  --max: 1180px;
  --shadow: 0 18px 50px rgba(11, 31, 51, 0.08);
  --shadow-soft: 0 8px 24px rgba(11, 31, 51, 0.05);
  --font: "Segoe UI", "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }

a { color: inherit; }

::selection { background: rgba(42, 157, 143, 0.24); }

:focus-visible {
  outline: 3px solid rgba(14, 124, 134, 0.42);
  outline-offset: 3px;
}

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 100;
  background: var(--paper);
  color: var(--ink);
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  box-shadow: var(--shadow);
  transition: top 0.2s ease;
}

.skip:focus { top: 14px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 240, 0.92);
  border-bottom: 1px solid rgba(11, 31, 51, 0.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.02em;
  font-size: 1rem;
  white-space: nowrap;
}

.brand-mark {
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--ink);
  color: var(--mint-light);
  font-size: 0.88rem;
  line-height: 1;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-shrink: 0;
  font-size: 0.82rem;
  font-weight: 600;
}

.nav a {
  color: #53636c;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease;
}

.nav a:hover, .nav a:focus-visible { color: var(--teal); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--ink);
  color: #ffffff !important;
  border-radius: 999px;
  padding: 9px 15px;
  transition: background 0.18s ease;
}

.nav-cta:hover { background: var(--teal); }

.hero {
  position: relative;
  overflow: hidden;
  background: #081828;
  color: #ffffff;
  padding: 66px 0 58px;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.78fr);
  gap: 56px;
  align-items: center;
}

.hero-copy { animation: rise 0.7s ease both; }

.eyebrow {
  margin: 0 0 13px;
  color: var(--teal);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 760px;
  margin: 0 0 20px;
  font-size: clamp(2.55rem, 4.7vw, 4.15rem);
  font-weight: 760;
  line-height: 1.01;
  letter-spacing: -0.052em;
}

.h1-accent { color: var(--mint-light); }

.hero-lead {
  max-width: 620px;
  margin: 0;
  color: #c8dce3;
  font-size: 1.02rem;
  line-height: 1.68;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
  margin-top: 27px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 43px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-family: var(--font);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--mint);
  color: #ffffff;
}

.btn-primary:hover { background: #238779; }

.btn-secondary {
  background: var(--paper);
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-secondary:hover { border-color: var(--teal); color: var(--teal-deep); }

.btn-quiet {
  background: transparent;
  border-color: transparent;
  color: var(--teal-deep);
  padding-inline: 8px;
}

.btn-quiet:hover { background: rgba(42, 157, 143, 0.08); }

.btn-small {
  min-height: 34px;
  padding: 6px 11px;
  font-size: 0.75rem;
  border-radius: 8px;
}

.btn:disabled { cursor: not-allowed; opacity: 0.5; transform: none; }

.btn-ghost {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.18);
  color: #ffffff;
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.13); }

.btn:disabled { cursor: not-allowed; opacity: 0.5; transform: none; }

.hero-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  background: rgba(9, 28, 43, 0.84);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.35);
}

.hero-metric {
  padding: 18px 21px 10px;
}

.hero-metric-value {
  display: block;
  color: #ffffff;
  font-size: clamp(2rem, 3.4vw, 2.8rem);
  font-weight: 760;
  line-height: 1;
  letter-spacing: -0.05em;
}

.hero-panel-top {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 21px 0;
}

.hero-panel-label {
  margin: 0;
  color: #8eb4c2;
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.live-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 9px;
  border: 1px solid rgba(142, 215, 210, 0.28);
  border-radius: 999px;
  background: rgba(42, 157, 143, 0.12);
  color: #c7efeb;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-mini-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 20px 21px 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-mini {
  padding: 12px 13px;
  background: rgba(8, 24, 38, 0.76);
}

.hero-mini span {
  display: block;
  color: #7fa4b3;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.hero-mini strong {
  display: block;
  margin-top: 4px;
  color: #f3fbfa;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-panel-foot {
  position: relative;
  margin: 15px 21px 19px;
  color: #87a7b4;
  font-size: 0.72rem;
  line-height: 1.5;
}

.hero-panel-foot strong { color: #dcecef; }

.hero-metric-label {
  display: block;
  margin-top: 8px;
  color: #9db9c5;
  font-size: 0.79rem;
}

.section { padding: 68px 0; }

.section-tinted {
  background: linear-gradient(180deg, rgba(240, 237, 230, 0.66), rgba(240, 237, 230, 0.38)), var(--cream);
  border-top: 1px solid rgba(11, 31, 51, 0.05);
  border-bottom: 1px solid rgba(11, 31, 51, 0.05);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 36px;
  margin-bottom: 27px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.75rem, 2.7vw, 2.45rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.section-lead {
  max-width: 510px;
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.62;
}

.score-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(330px, 0.82fr);
  gap: 26px;
  align-items: start;
}

.form-card, .result-card, .lab-card, .batch-card, .method-card {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--paper);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--line);
}

.card-head h3 { margin: 0; font-size: 1.12rem; letter-spacing: -0.025em; }

.form-body { padding: 4px 24px 24px; }

.form-group { padding: 20px 0 2px; border-bottom: 1px solid var(--line); }
.form-group:last-child { border-bottom: 0; padding-bottom: 0; }

.form-group-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.form-group-head h4 {
  margin: 0;
  color: var(--ink);
  font-size: 0.83rem;
  font-weight: 750;
  letter-spacing: 0.02em;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px 14px;
}

.field { display: flex; min-width: 0; flex-direction: column; gap: 6px; }

.field label {
  display: flex;
  align-items: baseline;
  gap: 8px;
  color: var(--muted-dark);
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.015em;
}

.input, .select {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fcfcfb;
  color: var(--ink);
  font-family: var(--font);
  font-size: 0.82rem;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--teal);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(14, 124, 134, 0.12);
}

.select { appearance: none; padding-right: 32px; }

.field-help {
  margin: 0;
  color: #7d8c94;
  font-size: 0.67rem;
  line-height: 1.45;
}

.result-panel {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.result-card { overflow: hidden; border-color: rgba(11, 31, 51, 0.13); }

.result-head {
  position: relative;
  overflow: hidden;
  padding: 22px 23px 19px;
  background: linear-gradient(145deg, #0b1f33 0%, #102f40 100%);
  color: #ffffff;
}

.result-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #9cb9c4;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.probability-row {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-top: 15px;
}

.probability {
  margin: 0;
  color: #ffffff;
  font-size: clamp(2.8rem, 5.2vw, 4rem);
  font-weight: 760;
  line-height: 0.9;
  letter-spacing: -0.065em;
  font-variant-numeric: tabular-nums;
}

.probability small { margin-left: 3px; font-size: 0.4em; font-weight: 600; }

.risk-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--risk);
  font-size: 0.69rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.risk-low { color: var(--mint); }
.risk-medium { color: var(--amber); }
.risk-high { color: var(--orange); }
.risk-critical { color: var(--coral); }

.result-body { padding: 20px 23px 22px; }

.result-section + .result-section {
  margin-top: 21px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.result-section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 10px;
  color: var(--muted-dark);
  font-size: 0.67rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tier-row, .margin-row, .action-row, .priority-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 6px 0;
  font-size: 0.82rem;
}
.label { color: var(--muted); font-size: 0.72rem; font-weight: 650; }
.tier-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 8px;
  background: var(--line-strong); color: var(--ink);
  font-size: 0.75rem; font-weight: 700;
}
.tier-badge.recommended { background: rgba(42, 157, 143, 0.14); color: #1b6b5f; border: 1px solid rgba(42, 157, 143, 0.3); }
.value { color: var(--ink); font-weight: 700; font-variant-numeric: tabular-nums; }
.action-upsell { color: #1b6b5f; font-weight: 650; }
.action-retention { color: #9c3e2b; font-weight: 650; }
.action-maintain { color: #4b5e69; font-weight: 650; }

.priority-bar {
  height: 8px; border-radius: 999px; background: #e9edef;
  overflow: hidden; margin-top: 4px;
}
.priority-fill {
  height: 100%; border-radius: inherit;
  background: linear-gradient(90deg, var(--mint), var(--teal));
  transition: width 0.3s ease;
}
.priority-value { color: var(--muted-dark); font-size: 0.72rem; font-weight: 700; margin-left: 6px; }

.margin-list, #marginList { display: grid; gap: 6px; margin-top: 8px; }
.margin-item {
  display: flex; justify-content: space-between;
  padding: 6px 8px; border-radius: 6px;
  background: #fbfaf7; font-size: 0.78rem;
}
.margin-value { font-variant-numeric: tabular-nums; font-weight: 700; }

.error-box {
  padding: 12px 14px;
  border: 1px solid rgba(231, 111, 81, 0.28);
  border-radius: 9px;
  background: rgba(231, 111, 81, 0.07);
  color: #9c3e2b;
  font-size: 0.75rem;
  line-height: 1.45;
}

.lab-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(0, 1.2fr);
  gap: 26px;
  align-items: start;
}

.lab-controls { padding: 25px 26px; border-right: 1px solid var(--line); }
.lab-controls h3 { margin: 0; font-size: 1.14rem; letter-spacing: -0.025em; }
.lab-controls p { margin: 6px 0 0; color: var(--muted); font-size: 0.79rem; line-height: 1.55; }

.threshold-readout {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-top: 24px;
}
.threshold-value {
  margin: 0; font-family: var(--mono); font-size: 2.2rem; font-weight: 700;
  line-height: 1; letter-spacing: -0.05em; font-variant-numeric: tabular-nums;
}
.threshold-chip {
  padding: 4px 7px; border: 1px solid var(--line); border-radius: 5px;
  background: #fbfaf7; color: var(--muted); font-size: 0.62rem; font-weight: 650;
}

.slider { width: 100%; margin: 18px 0 8px; accent-color: var(--teal); cursor: pointer; }
.slider-ticks {
  display: flex; justify-content: space-between;
  color: #8a989f; font-family: var(--mono); font-size: 0.59rem;
}

.lab-hint {
  margin: 19px 0 0; padding: 10px 11px;
  border-left: 3px solid var(--mint); border-radius: 0 7px 7px 0;
  background: rgba(42, 157, 143, 0.07);
  color: #4d6671; font-size: 0.68rem; line-height: 1.5;
}

.lab-chart { padding: 22px 26px 18px; }
.chart-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.chart-title {
  margin: 0; color: var(--ink-soft); font-size: 0.78rem; font-weight: 700;
}

.lab-metrics {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  background: #fbfaf7;
}
.lab-metric {
  padding: 15px 16px; border-right: 1px solid var(--line);
}
.lab-metric:last-child { border-right: 0; }
.lab-metric span {
  display: block; color: var(--muted);
  font-size: 0.59rem; font-weight: 650; letter-spacing: 0.07em; text-transform: uppercase;
}
.lab-metric strong {
  display: block; margin-top: 4px;
  color: var(--ink); font-size: 1.08rem; font-weight: 700;
  line-height: 1.1; letter-spacing: -0.03em; font-variant-numeric: tabular-nums;
}

.batch-card { overflow: hidden; }
.batch-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 24px; padding: 24px 26px 20px; border-bottom: 1px solid var(--line);
}
.batch-head h3 { margin: 0; font-size: 1.14rem; letter-spacing: -0.025em; }
.batch-head p {
  max-width: 620px; margin: 5px 0 0; color: var(--muted);
  font-size: 0.79rem; line-height: 1.55;
}

.dropzone {
  position: relative; display: flex; align-items: center; gap: 15px;
  margin: 22px 26px; padding: 17px 18px;
  border: 1px dashed #b9c7cc; border-radius: 12px;
  background: #fbfaf7; transition: border-color 0.18s ease;
}
.dropzone:hover { border-color: var(--teal); background: rgba(42, 157, 143, 0.04); }

.dropzone-icon {
  display: grid; place-items: center; width: 40px; height: 40px;
  border-radius: 10px; background: rgba(14, 124, 134, 0.1);
  color: var(--teal-deep); font-size: 1.05rem;
}

.dropzone-copy { min-width: 0; flex: 1; }
.dropzone-copy strong { display: block; color: var(--ink); font-size: 0.85rem; }
.dropzone-copy span {
  display: block; margin-top: 2px; color: var(--muted); font-size: 0.72rem;
}

.batch-status {
  margin: 0 26px 16px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px;
  background: #fbfaf7; color: var(--muted-dark);
  font-size: 0.74rem; line-height: 1.45;
}
.batch-status.is-success {
  border-color: rgba(42, 157, 143, 0.24);
  background: rgba(42, 157, 143, 0.06);
  color: #2b665d;
}

.table-wrap {
  margin: 0 26px 24px; overflow-x: auto;
  border: 1px solid var(--line); border-radius: 11px;
}
.data-table {
  width: 100%; border-collapse: collapse; white-space: nowrap;
  font-size: 0.7rem;
}
.data-table th {
  position: sticky; top: 0; padding: 9px 11px;
  border-bottom: 1px solid var(--line);
  background: #f7f5f0; color: var(--muted);
  font-size: 0.59rem; font-weight: 750; letter-spacing: 0.06em;
  text-align: left; text-transform: uppercase;
}
.data-table td {
  padding: 9px 11px; border-bottom: 1px solid #edf0f1;
  color: #334c58; font-variant-numeric: tabular-nums;
}
.data-table tbody tr:hover { background: #fbfaf7; }

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.method-card {
  padding: 22px 22px 20px;
}
.method-card h3 {
  margin: 14px 0 7px; font-size: 0.98rem; letter-spacing: -0.02em;
}
.method-card p {
  margin: 0; color: var(--muted);
  font-size: 0.78rem; line-height: 1.6;
}

.footer {
  padding: 0 0 32px; color: var(--muted);
  font-size: 0.72rem;
}
.footer-inner {
  display: flex; align-items: center;
  justify-content: space-between; gap: 22px;
  padding-top: 24px; border-top: 1px solid var(--line);
}
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer a { color: var(--muted-dark); text-decoration: none; }
.footer a:hover { color: var(--teal-deep); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1100px) {
  .nav { gap: 16px; }
  .nav a:not(.nav-cta) { display: none; }
}

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .score-layout { grid-template-columns: 1fr; }
  .result-panel { position: static; }
  .lab-grid { grid-template-columns: 1fr; }
  .lab-controls { border-right: 0; border-bottom: 1px solid var(--line); }
  .lab-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .method-grid { grid-template-columns: 1fr; }
  .batch-head { flex-direction: column; }
}

@media (max-width: 640px) {
  .wrap { width: min(var(--max), calc(100% - 32px)); }
  .site-header { position: static; }
  .header-inner { min-height: 62px; gap: 14px; }
  .brand-sub { display: none; }
  .nav { gap: 13px; font-size: 0.73rem; }
  .nav a:not(.nav-cta) { display: none; }
  .hero { padding: 42px 0 44px; }
  .hero h1 { font-size: clamp(2.2rem, 12vw, 3rem); }
  .section { padding: 44px 0; }
  .field-grid { grid-template-columns: 1fr; }
  .form-body { padding: 2px 17px 18px; }
  .result-body { padding: 17px 18px 19px; }
  .lab-controls, .lab-chart { padding: 19px 17px; }
  .lab-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .batch-head { padding: 19px 17px 16px; }
  .dropzone, .batch-status, .table-wrap { margin-left: 17px; margin-right: 17px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}