:root {
  --ink: #15202b;
  --muted: #5d6874;
  --navy: #17304d;
  --navy-deep: #0d1f31;
  --on-navy: #ffffff;
  --on-navy-muted: #a7b6c6;
  --signal: #f0b429;
  --accent: #ffd36e;
  --rule: #d6dce2;
  --grey: #eef1f4;
  --paper: #ffffff;
  --edge: clamp(20px, 4.5vw, 72px);
  --sans: "Instrument Sans", "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}

.edge { padding-left: var(--edge); padding-right: var(--edge); }

/* ================= hero ================= */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--navy-deep);
  color: var(--on-navy);
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

.hero-media { position: absolute; inset: 0; }
.hero-media video, .hero-media .scene { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero.has-video .scene { display: none; }
.hero.has-video .hero-shade {
  background:
    radial-gradient(ellipse at 50% 45%, rgba(9,20,32,.35) 0%, rgba(9,20,32,0) 70%),
    linear-gradient(to bottom, rgba(9,20,32,.62) 0%, rgba(9,20,32,.48) 40%, rgba(9,20,32,.55) 70%, rgba(9,20,32,.88) 100%);
}
.hero-shade {
  position: absolute; inset: 0;
  background:
    linear-gradient(to bottom, rgba(9,20,32,.55) 0%, rgba(9,20,32,.30) 38%, rgba(9,20,32,.45) 70%, rgba(9,20,32,.85) 100%);
}

/* drawn placeholder scene */
.scene .b-fill { fill: #0a1621; }
.scene .b-boom { stroke: #0a1621; stroke-width: 4.5; stroke-linecap: round; }
.scene .b-mast { stroke: #0a1621; stroke-width: 3.5; }
.scene .b-stay { stroke: #0a1621; stroke-width: 1.1; }
.scene .b-win { fill: #ffcf7a; }
.scene .b-light { fill: #fff6dc; }
.scene .b-wake { fill: none; stroke: #dbe8f1; stroke-opacity: .22; stroke-width: 2; }
.scene .boat-reflect { opacity: .22; }
.scene .boat { animation: bob 6s ease-in-out infinite alternate; transform-box: view-box; }
@keyframes bob { from { transform: translateY(0) rotate(-.5deg); } to { transform: translateY(2px) rotate(.5deg); } }

.topbar { position: relative; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-top: 22px; padding-bottom: 22px; }
.wordmark { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 17px; letter-spacing: -.01em; }
.logo { width: 30px; height: 19px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.draft { font-size: 12px; color: var(--accent); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }

.lang { display: flex; border: 1px solid rgba(255,255,255,.4); border-radius: 999px; overflow: hidden; }
.lang button { font: 600 13px var(--sans); background: none; border: 0; color: var(--on-navy); padding: 6px 13px; cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--on-navy); color: var(--navy-deep); }

.hero-center {
  position: relative;
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  padding-top: 2vh; padding-bottom: 12vh;
}

.date-pill {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0 0 26px; padding: 7px 16px;
  font-size: 14px; font-weight: 500;
  border: 1px solid rgba(255,255,255,.28); border-radius: 999px;
  background: rgba(255,255,255,.08); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.date-pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 rgba(255,211,110,.6); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(255,211,110,.55); } 70% { box-shadow: 0 0 0 10px rgba(255,211,110,0); } 100% { box-shadow: 0 0 0 0 rgba(255,211,110,0); } }

.kicker { margin: 0 0 14px; font-size: clamp(16px, 1.3vw, 20px); font-weight: 500; color: rgba(255,255,255,.8); letter-spacing: 0; }

/* main line: gas oil − floor = difference */
.big-eq { display: flex; align-items: flex-end; justify-content: center; gap: clamp(14px, 2.2vw, 40px); }
.be-item { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.be-l { font-size: clamp(12px, .95vw, 15px); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--on-navy-muted); display: inline-flex; align-items: center; gap: 8px; }
.be-v { font-size: clamp(48px, 7.4vw, 132px); font-weight: 600; line-height: .95; letter-spacing: -.04em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.be-muted { color: rgba(255,255,255,.62); }
.be-diff .be-v { color: var(--accent); }
.be-rel { letter-spacing: 0; text-transform: none; font-size: clamp(13px, 1vw, 16px); font-weight: 700; color: var(--navy-deep); background: var(--accent); padding: 2px 9px; border-radius: 999px; font-variant-numeric: tabular-nums; }
.be-op { font-size: clamp(36px, 5vw, 90px); font-weight: 300; line-height: 1; color: rgba(255,255,255,.55); padding-bottom: .1em; }

.hero-sub { margin: 26px 0 0; max-width: 48ch; text-wrap: balance; font-size: clamp(17px, 1.35vw, 21px); line-height: 1.45; color: rgba(255,255,255,.88); }
.hero-sub strong { color: var(--accent); font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

.cta-row { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 30px; flex-wrap: wrap; }

/* what follows from the difference */
.derived {
  display: flex; align-items: center; gap: 4px;
  padding: 7px 10px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.28);
  background: rgba(13,31,49,.45); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.chip { display: flex; flex-direction: column; align-items: flex-start; padding: 4px 16px; text-align: left; }
.chip-l { font-size: 11px; font-weight: 600; letter-spacing: .07em; text-transform: uppercase; color: var(--on-navy-muted); }
.chip-v { font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }
.chip-sep { width: 1px; height: 32px; background: rgba(255,255,255,.2); }

.btn-white {
  display: inline-flex; align-items: center; height: 62px; padding: 0 30px;
  border-radius: 999px; background: var(--on-navy); color: var(--navy-deep);
  font-weight: 600; font-size: 18px; text-decoration: none;
  transition: transform .2s, box-shadow .2s;
}
.btn-white:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,0,0,.25); }

.applies { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 26px; font-size: 15px; color: rgba(255,255,255,.82); }

.scroll-cue { position: absolute; left: 50%; bottom: 22px; transform: translateX(-50%); width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; border: 1px solid rgba(255,255,255,.3); }
.scroll-cue svg { width: 18px; height: 18px; fill: none; stroke: #fff; stroke-width: 2; animation: nudge 2s ease-in-out infinite; }
@keyframes nudge { 0%, 100% { transform: translateY(-2px); } 50% { transform: translateY(3px); } }

/* entrance */
.js .hero-center > *, .js .topbar { opacity: 0; transform: translateY(16px); }
.is-in .topbar { animation: rise .8s ease-out forwards; }
.is-in .hero-center > * { animation: rise .9s cubic-bezier(.2,.7,.2,1) forwards; }
.is-in .hero-center > :nth-child(1) { animation-delay: .05s; }
.is-in .hero-center > :nth-child(2) { animation-delay: .15s; }
.is-in .hero-center > :nth-child(3) { animation-delay: .35s; }
.is-in .hero-center > :nth-child(4) { animation-delay: .55s; }
.is-in .hero-center > :nth-child(5) { animation-delay: .8s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* flatfish icons */
.species { list-style: none; margin: 0; padding: 0; display: flex; }
.species li { display: flex; margin-left: -10px; }
.species li:first-child { margin-left: 0; }
.species li > span { display: none; }
.species svg { width: 46px; height: 22px; overflow: visible; }
.species .fringe { fill: none; stroke: rgba(255,255,255,.55); stroke-width: 9; stroke-dasharray: .5 1.7; }
.species .body { fill: #1b3047; stroke: var(--on-navy); stroke-width: 1.8; }
.species .tail { fill: #1b3047; stroke: var(--on-navy); stroke-width: 1.8; }
.species .rays line { stroke: rgba(255,255,255,.5); stroke-width: .8; }
.species .lateral { fill: none; stroke: rgba(255,255,255,.35); stroke-width: 1; }
.species .eye { fill: var(--on-navy); }
.species .knob { fill: rgba(255,255,255,.45); }

/* ================= content rows ================= */
.row { position: relative; padding: clamp(56px, 9vh, 120px) 0; border-bottom: 1px solid var(--rule); }
.row > .edge { position: relative; }
.row-grey { background: var(--grey); border-bottom: 0; }
.row-signal { background: var(--signal); border-bottom: 0; }
.row-dark { background: var(--navy); color: var(--on-navy); border-bottom: 0; overflow: hidden; }
.row-grid { display: grid; grid-template-columns: minmax(200px, 3fr) minmax(0, 9fr); gap: 24px 4vw; align-items: start; }
h2 { font-size: clamp(30px, 2.8vw, 46px); line-height: 1.05; font-weight: 600; letter-spacing: -.025em; margin: 0; color: var(--navy); }
.row-dark h2 { color: var(--on-navy); }
.row-signal h2 { color: var(--navy-deep); }
.row-lead { margin: 16px 0 0; color: var(--on-navy-muted); font-size: 17px; max-width: 30ch; }

/* sea chart background on the dark row */
.row-dark > .seachart { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.seachart .contour { fill: none; stroke: rgba(255,255,255,.06); stroke-width: 1; }
.seachart .contour.major { stroke: rgba(255,255,255,.10); }
.seachart .sounding { font: italic 13px var(--sans); fill: rgba(255,255,255,.12); }

/* price ruler */
.ruler { display: block; width: 100%; height: 104px; }
.ruler .axis-cap { font: 600 12px var(--sans); fill: var(--on-navy-muted); letter-spacing: .06em; text-transform: uppercase; }
.ruler .tick { stroke: rgba(255,255,255,.45); stroke-width: 1; }
.ruler .tick-lbl { font: 500 13px var(--sans); fill: var(--on-navy-muted); }
.ruler .zone-none { fill: rgba(255,255,255,.12); }
.ruler .zone-base { fill: rgba(255,255,255,.28); }
.ruler .zone-diff { fill: var(--signal); }
.ruler .mk-floor { stroke: var(--on-navy); stroke-width: 1.5; stroke-dasharray: 3 3; }
.ruler .mk-today { stroke: var(--signal); stroke-width: 2.5; }
.ruler .mk-lbl { font: 600 14px var(--sans); fill: var(--on-navy); }
.ruler .mk-lbl-today { fill: var(--accent); }

/* history chart */
.chart-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; border-top: 1px solid rgba(255,255,255,.14); padding-top: 14px; margin-top: 18px; }
.chart-legend { display: flex; flex-wrap: wrap; gap: 6px 24px; font-size: 12px; color: var(--on-navy-muted); text-transform: uppercase; letter-spacing: .07em; font-weight: 600; }
.lg::before { content: ""; display: inline-block; width: 18px; vertical-align: middle; margin-right: 8px; }
.lg-price::before { border-top: 2.5px solid var(--on-navy); }
.lg-floor::before { border-top: 2px dashed var(--on-navy-muted); }
.lg-diff::before { height: 10px; background: repeating-linear-gradient(45deg, rgba(240,180,41,.85) 0 2px, transparent 2px 5px); }
.range { display: flex; border: 1px solid rgba(255,255,255,.4); border-radius: 999px; overflow: hidden; }
.range button { font: 600 13px var(--sans); background: none; border: 0; color: var(--on-navy); padding: 5px 12px; cursor: pointer; }
.range button[aria-pressed="true"] { background: var(--on-navy); color: var(--navy-deep); }

#heroChart { display: block; width: 100%; height: 220px; margin-top: 8px; touch-action: pan-y; }
#heroChart text { font: 13px var(--sans); fill: var(--on-navy-muted); }
#heroChart .r-axis { fill: var(--accent); font-weight: 600; }
#heroChart .grid { stroke: rgba(255,255,255,.10); }
#heroChart .diff-area { fill: url(#hatch); }
#heroChart .hatch-line { stroke: var(--signal); stroke-width: 2; opacity: .75; }
#heroChart .floor-line { fill: none; stroke: var(--on-navy-muted); stroke-width: 1.5; stroke-dasharray: 5 4; }
#heroChart .price-line { fill: none; stroke: var(--on-navy); stroke-width: 2.5; stroke-linejoin: round; }
#heroChart .last-dot { fill: var(--signal); stroke: var(--navy); stroke-width: 2; }
#heroChart .hit { fill: transparent; cursor: crosshair; }
#heroChart .tip line { stroke: rgba(255,255,255,.5); stroke-width: 1; }
#heroChart .tip circle { fill: var(--on-navy); }
#heroChart .tip rect { fill: var(--navy-deep); stroke: rgba(255,255,255,.25); }
#heroChart .tip text { fill: var(--on-navy); font-weight: 600; }

/* draw-in when the section scrolls into view */
.play .zone-diff { transform-box: fill-box; transform-origin: left center; animation: grow 1.3s cubic-bezier(.2,.7,.2,1) both .2s; }
.play .mk-today, .play .mk-lbl-today { animation: fade .5s both 1.3s; }
.play #heroChart .price-line { stroke-dasharray: 1; animation: draw 1.8s ease-out both .3s; }
.play #heroChart .diff-area { animation: fade 1s both 1s; }
.play #heroChart .last-dot { animation: fade .4s both 2s; }
@keyframes grow { from { transform: scaleX(0); } }
@keyframes draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
@keyframes fade { from { opacity: 0; } }

/* calculator */
.calc label { display: block; font-weight: 600; color: var(--navy-deep); margin-bottom: 10px; }
.calc-line { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; }
.calc input {
  font: 700 clamp(44px, 5vw, 80px)/1 var(--sans);
  color: var(--navy-deep);
  width: 4.2em;
  padding: 4px 0;
  border: 0;
  border-bottom: 4px solid var(--navy-deep);
  background: transparent;
  font-variant-numeric: tabular-nums;
}
.calc input:focus { outline: none; border-bottom-color: var(--paper); }
.calc-arrow { font-size: clamp(32px, 3vw, 52px); color: var(--navy-deep); }
.calc output { font-size: clamp(18px, 1.5vw, 24px); color: var(--navy-deep); font-weight: 500; }
.calc output strong { display: block; font-size: clamp(44px, 5vw, 80px); line-height: 1; font-weight: 700; letter-spacing: -.03em; }

/* tables */
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 17px; }
th, td { text-align: left; padding: 11px 12px 11px 0; border-bottom: 1px solid var(--rule); }
thead th { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border-bottom: 2px solid var(--navy); font-weight: 600; }
.num { text-align: right; padding-right: 0; padding-left: 12px; }
.history tbody tr:first-child td { font-weight: 700; }
.table-actions { display: flex; gap: 24px; margin-top: 18px; }
.linkish { font: 600 17px var(--sans); color: var(--navy); background: none; border: 0; padding: 0; text-decoration: underline; cursor: pointer; }

/* rules */
.rules { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px 4vw; align-items: start; }
.formula { font: 15px/1.8 Consolas, "Courier New", monospace; margin: 0; white-space: pre-wrap; color: var(--ink); }
.params th { font-weight: 400; color: var(--muted); }
.params td { font-weight: 600; text-align: right; padding-right: 0; }

/* faq */
details.q { border-top: 1px solid var(--rule); padding: 20px 0; }
details.q:last-child { border-bottom: 1px solid var(--rule); }
details.q summary { cursor: pointer; font-weight: 600; font-size: clamp(19px, 1.5vw, 23px); list-style: none; display: flex; justify-content: space-between; gap: 16px; }
details.q summary::-webkit-details-marker { display: none; }
details.q summary::after { content: "+"; color: var(--navy); font-weight: 400; font-size: 28px; line-height: .9; }
details.q[open] summary::after { content: "−"; }
details.q p { margin: 10px 0 0; color: var(--muted); max-width: 60ch; }

.footer { background: var(--navy-deep); color: var(--on-navy-muted); padding: 36px 0; font-size: 15px; }
.footer-row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; }

/* ================= surcharge calculator ================= */
.btn-ghost {
  display: inline-flex; align-items: center; height: 62px; padding: 0 28px;
  border-radius: 999px; border: 1px solid rgba(255,255,255,.45); color: var(--on-navy);
  font-weight: 600; font-size: 18px; text-decoration: none;
  background: rgba(13,31,49,.35); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transition: background .2s;
}
.btn-ghost:hover { background: rgba(255,255,255,.12); }

.row-lead-light { color: var(--muted); }
.sim-intro .s-ratio { margin: 20px 0 14px; padding-left: 12px; border-left: 3px solid var(--signal); color: var(--ink); font-size: 15px; max-width: 30ch; }
.sim-intro .linkish { font-size: 15px; }

.sim-card { background: var(--paper); border-radius: 20px; box-shadow: 0 1px 2px rgba(16,32,48,.06), 0 12px 40px rgba(16,32,48,.08); padding: clamp(20px, 2.6vw, 40px); }

.sim-inputs { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 28px; }
.s-group { min-width: 0; }
.s-gh { display: flex; align-items: center; gap: 10px; min-height: 26px; margin-bottom: 14px; font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.s-test { padding-left: 28px; border-left: 1px dashed var(--rule); }
.s-tag { border: 0; padding: 2px 9px; border-radius: 999px; background: #fdf0cf; color: #8a5a00; font: 600 11px var(--sans); letter-spacing: .04em; text-transform: uppercase; cursor: pointer; }
.s-tag:hover { background: #f9e2a6; }
.s-today { border: 1px solid var(--rule); background: none; border-radius: 999px; padding: 2px 10px; font: 600 11px var(--sans); letter-spacing: .04em; text-transform: uppercase; color: var(--navy); cursor: pointer; }
.s-today:hover { border-color: var(--navy); }

.s-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.s-fields-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.field { display: flex; flex-direction: column; min-width: 0; }
.f-l { font-size: 14px; color: var(--muted); margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.f-in { display: flex; align-items: baseline; gap: 6px; border-bottom: 2px solid var(--rule); transition: border-color .2s; }
.f-in:focus-within { border-color: var(--navy); }
.f-in input {
  min-width: 0; width: 100%; border: 0; background: none; padding: 2px 0 4px;
  font: 600 clamp(22px, 2vw, 30px) var(--sans); color: var(--ink); letter-spacing: -.02em; font-variant-numeric: tabular-nums;
  -moz-appearance: textfield; appearance: textfield;
}
.f-in input:focus { outline: none; }
.f-in input::-webkit-outer-spin-button, .f-in input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.f-u { font-size: 14px; color: var(--muted); white-space: nowrap; }

.slider {
  -webkit-appearance: none; appearance: none; width: 100%; height: 6px; margin: 16px 0 4px; border-radius: 999px; outline: none; cursor: pointer;
  background: linear-gradient(to right, var(--navy) 0 var(--p, 50%), #dde3e8 var(--p, 50%) 100%);
}
.s-test .slider { background: linear-gradient(to right, var(--signal) 0 var(--p, 50%), #dde3e8 var(--p, 50%) 100%); }
.slider::-webkit-slider-thumb { -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 3px solid var(--navy); box-shadow: 0 1px 4px rgba(0,0,0,.18); }
.slider::-moz-range-thumb { width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 3px solid var(--navy); box-shadow: 0 1px 4px rgba(0,0,0,.18); }
.s-test .slider::-webkit-slider-thumb { border-color: #d39a12; }
.s-test .slider::-moz-range-thumb { border-color: #d39a12; }

/* revenue bar */
.sim-bar { margin-top: 34px; padding-top: 26px; border-top: 1px solid var(--rule); }
.sb-head { display: flex; justify-content: space-between; align-items: baseline; font-size: 14px; color: var(--muted); margin-bottom: 10px; }
.sb-head b { color: var(--ink); font-size: 16px; font-variant-numeric: tabular-nums; }
.sb-track { height: 44px; border-radius: 10px; background: repeating-linear-gradient(90deg, #e9edf1 0 24px, #e3e8ed 24px 25px); overflow: hidden; }
.sb-cost { height: 100%; border-radius: 10px 0 0 10px; background: repeating-linear-gradient(45deg, rgba(23,48,77,.16) 0 3px, transparent 3px 7px); box-shadow: inset 0 0 0 2px var(--navy); transition: width .45s cubic-bezier(.2,.7,.2,1); position: relative; }
.sb-applied { height: 100%; background: var(--signal); transition: width .45s cubic-bezier(.2,.7,.2,1); border-radius: 10px 0 0 10px; }
.sb-legend { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 12px; font-size: 15px; color: var(--muted); }
.sl b { color: var(--ink); font-variant-numeric: tabular-nums; }
.sl::before { content: ""; display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 8px; vertical-align: -1px; }
.sl-a::before { background: var(--signal); }
.sl-b::before { background: repeating-linear-gradient(45deg, rgba(23,48,77,.35) 0 2px, transparent 2px 4px); box-shadow: inset 0 0 0 1.5px var(--navy); }

/* chain of steps */
.sim-steps { list-style: none; margin: 30px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; counter-reset: st; }
.sim-steps li { position: relative; display: flex; flex-direction: column; gap: 4px; padding: 16px 18px; counter-increment: st; border-radius: 14px; }
.sim-steps li + li::before { content: "→"; position: absolute; left: -9px; top: 44px; color: var(--muted); font-size: 18px; }
.ss-l { font-size: 13px; color: var(--muted); }
.ss-l::before { content: counter(st) " · "; color: #a3adb7; }
.ss-v { font-size: clamp(24px, 2.2vw, 34px); font-weight: 600; letter-spacing: -.02em; font-variant-numeric: tabular-nums; color: var(--ink); white-space: nowrap; }
.ss-c { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.ss-final { background: var(--signal); }
.ss-final .ss-l, .ss-final .ss-c, .ss-final .ss-l::before { color: var(--navy-deep); }
.ss-final .ss-v { color: var(--navy-deep); font-size: clamp(30px, 3vw, 46px); font-weight: 700; }

@media (max-width: 1200px) {
  .sim-inputs { grid-template-columns: 1fr; }
  .s-test { padding-left: 0; border-left: 0; padding-top: 22px; border-top: 1px dashed var(--rule); }
}
@media (max-width: 760px) {
  .s-fields-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sim-steps { grid-template-columns: 1fr 1fr; gap: 8px; }
  .sim-steps li + li::before { display: none; }
  .btn-ghost { width: 100%; justify-content: center; height: 54px; }
}
@media (max-width: 420px) {
  .s-fields, .s-fields-3 { grid-template-columns: 1fr; }
}

/* ================= smaller screens ================= */
@media (max-width: 1000px) {
  .row-grid { grid-template-columns: 1fr; gap: 28px; }
  .rules { grid-template-columns: 1fr; }
  .row-lead { max-width: none; }
}
@media (max-width: 760px) {
  .derived { width: 100%; border-radius: 18px; justify-content: space-around; }
  .chip { padding: 6px 8px; }
  /* receipt-style sum on phones */
  .big-eq { display: grid; grid-template-columns: auto 1fr; align-items: baseline; gap: 6px 14px; width: 100%; max-width: 340px; }
  .big-eq .be-op { grid-column: 1; font-size: 34px; padding: 0; }
  .be-item { grid-column: 2; flex-direction: row-reverse; justify-content: space-between; align-items: baseline; gap: 12px; }
  .big-eq > .be-item:first-child { grid-column: 2; }
  .be-diff { border-top: 1px solid rgba(255,255,255,.35); padding-top: 8px; }
  .be-v { font-size: 44px; }
  .btn-white { width: 100%; justify-content: center; height: 54px; }
}
@media (max-width: 560px) {
  body { font-size: 17px; }
  .wordmark { font-size: 14px; max-width: 200px; line-height: 1.2; }
  .logo { flex-shrink: 0; }
  .topbar-right { flex-direction: column-reverse; align-items: flex-end; gap: 6px; }
  .draft { font-size: 10px; }
  .hero-center { padding-bottom: 80px; }
  .date-pill { font-size: 12px; margin-bottom: 20px; }
  .chip-v { font-size: 18px; }
  .chip-l { font-size: 10px; }
  .applies { font-size: 13px; }
  .ruler .tick-lbl, .ruler .mk-lbl { font-size: 11px; }
  #heroChart { height: 170px; }
  #heroChart text { font-size: 11px; }
  .chart-head { flex-direction: column; align-items: flex-start; }
  .chart-legend { font-size: 11px; gap: 4px 14px; }
  .hide-s { display: none; }
  .table-actions { flex-wrap: wrap; gap: 12px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .hero-center > *, .js .topbar { opacity: 1; transform: none; }
}