:root {
  --bg: #0e141c;
  --bg2: #162030;
  --ink: #e6edf5;
  --muted: #8a9bb0;
  --accent: #f0a202;
  --accent-ink: #1a1200;
  --good: #3d8bfd;
  --better: #2ec4b6;
  --best: #f0a202;
  --line: rgba(230, 237, 245, 0.1);
  --warn: #ff7a7a;
  --font: "Outfit", system-ui, sans-serif;
  --display: "Sora", "Outfit", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, transparent 0%, rgba(14, 20, 28, 0.4) 100%),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 47px,
      rgba(240, 162, 2, 0.03) 47px,
      rgba(240, 162, 2, 0.03) 48px
    ),
    radial-gradient(ellipse 70% 55% at 85% 0%, rgba(46, 196, 182, 0.18), transparent 55%),
    radial-gradient(ellipse 55% 45% at 5% 90%, rgba(61, 139, 253, 0.16), transparent 50%),
    linear-gradient(160deg, var(--bg), var(--bg2));
}
.atmosphere::after {
  content: "";
  position: absolute;
  right: -4%;
  bottom: 8%;
  width: min(52vw, 28rem);
  height: min(52vw, 28rem);
  background:
    linear-gradient(135deg, transparent 48%, rgba(240, 162, 2, 0.12) 48%, rgba(240, 162, 2, 0.12) 52%, transparent 52%),
    linear-gradient(135deg, transparent 58%, rgba(46, 196, 182, 0.1) 58%, rgba(46, 196, 182, 0.1) 62%, transparent 62%),
    linear-gradient(135deg, transparent 68%, rgba(61, 139, 253, 0.1) 68%, rgba(61, 139, 253, 0.1) 72%, transparent 72%);
  clip-path: polygon(20% 100%, 100% 100%, 100% 0);
  pointer-events: none;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.03em;
}
.top nav { display: flex; gap: 0.75rem; align-items: center; }
.top nav a:not(.btn) { color: var(--muted); text-decoration: none; font-size: 0.95rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  text-decoration: none;
  font: inherit;
  font-weight: 600;
  padding: 0.65rem 1.1rem;
  border-radius: 2px;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover:not(:disabled) { transform: translateY(-1px); }
.btn.buy { background: var(--accent); color: var(--accent-ink); }
.btn.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.hero {
  min-height: calc(100vh - 4rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem 1.5rem 4rem;
  max-width: 42rem;
  position: relative;
}
.brand-hero {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.6rem, 9vw, 4.4rem);
  letter-spacing: -0.05em;
  margin: 0 0 1rem;
  line-height: 0.95;
  background: linear-gradient(120deg, var(--ink) 40%, var(--better) 75%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero h1 {
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  font-weight: 550;
  margin: 0 0 0.75rem;
  max-width: 24ch;
  letter-spacing: -0.02em;
}
.lede { color: var(--muted); margin: 0 0 1.75rem; max-width: 38ch; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.ladder-preview {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0 0 2rem;
  max-width: 18rem;
}
.ladder-preview span {
  display: block;
  height: 0.55rem;
  border-radius: 1px;
  opacity: 0.85;
  animation: climb 2.4s ease-in-out infinite;
}
.ladder-preview span:nth-child(1) {
  width: 42%;
  background: var(--good);
  animation-delay: 0s;
}
.ladder-preview span:nth-child(2) {
  width: 68%;
  background: var(--better);
  animation-delay: 0.2s;
}
.ladder-preview span:nth-child(3) {
  width: 100%;
  background: var(--best);
  animation-delay: 0.4s;
}
@keyframes climb {
  0%, 100% { transform: translateX(0); opacity: 0.7; }
  50% { transform: translateX(6px); opacity: 1; }
}

.strip {
  padding: 2.5rem 1.5rem 3rem;
  border-top: 1px solid var(--line);
  max-width: 40rem;
}
.strip h2 {
  font-family: var(--display);
  margin: 0 0 1rem;
  letter-spacing: -0.03em;
}
.strip ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.strip li { margin-bottom: 0.4rem; }

.foot {
  padding: 1.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
.foot a { color: var(--accent); }

/* —— App —— */
.app-body .workspace {
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.status {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
  font-family: var(--mono);
}
.status.on { color: var(--better); }

.gap-bar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}
.gap-chip {
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.22);
  padding: 0.85rem 1rem;
  border-radius: 2px;
}
.gap-chip .label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 0.25rem;
}
.gap-chip .value {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 500;
}
.gap-chip.thin .value { color: var(--warn); }

.tiers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: stretch;
}
.tier {
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.tier::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
}
.tier.good::before { background: var(--good); }
.tier.better::before { background: var(--better); }
.tier.best::before { background: var(--best); }
.tier-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}
.tier-head h2 {
  font-family: var(--display);
  font-size: 1rem;
  margin: 0;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
}
.tier.good .tier-head h2 { color: var(--good); }
.tier.better .tier-head h2 { color: var(--better); }
.tier.best .tier-head h2 { color: var(--best); }
.rung {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--muted);
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}
.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}
input, textarea {
  font: inherit;
  color: var(--ink);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 0.6rem 0.7rem;
  width: 100%;
}
input:focus, textarea:focus {
  outline: 1px solid rgba(240, 162, 2, 0.45);
  border-color: rgba(240, 162, 2, 0.35);
}
textarea {
  min-height: 7.5rem;
  resize: vertical;
  font-size: 0.9rem;
}

.margins {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.5rem;
  border-top: 1px dashed var(--line);
}
.margins div {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.55rem 0.65rem;
}
.margins .label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}
.margins .value {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
}
.margins .value.neg { color: var(--warn); }
.margins .value.ok { color: var(--better); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

dialog {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg2);
  color: var(--ink);
  padding: 1.25rem;
  max-width: 22rem;
  width: calc(100% - 2rem);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
dialog h2 {
  font-family: var(--display);
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
dialog p { color: var(--muted); font-size: 0.9rem; }
.err { color: var(--warn); font-size: 0.85rem; }

@media (max-width: 900px) {
  .tiers { grid-template-columns: 1fr; }
  .gap-bar { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .top { flex-wrap: wrap; gap: 0.75rem; }
  .field-row { grid-template-columns: 1fr; }
}