:root {
  --bg: #090a0c;
  --surface: #111214;
  --surface-2: #17181b;
  --text: #f4efe6;
  --muted: #aaa49a;
  --muted-2: #746f67;
  --accent: #c96a43;
  --accent-rgb: 201, 106, 67;
  --border: rgba(244, 239, 230, .1);
  --border-strong: rgba(244, 239, 230, .2);
  --success: #7bc69a;
  --max: 1080px;
}

*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: dark; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Outfit', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  font-weight: 300;
  line-height: 1.6;
}
body::before {
  position: fixed;
  inset: -22vh -14vw auto auto;
  width: 68vw;
  height: 68vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb), .12), transparent 66%);
  content: '';
  pointer-events: none;
  z-index: 0;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { color: inherit; }
.wrap { position: relative; z-index: 1; width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }

.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 17px max(24px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--border);
  background: rgba(9, 10, 12, .82);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-family: 'Fraunces', Georgia, serif; font-size: 1.08rem; font-weight: 600; }
.brand-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 20px; color: var(--muted); font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; }
.nav-links a:hover { color: var(--text); }

.breadcrumb { padding-top: 42px; color: var(--muted-2); font-size: .78rem; }
.breadcrumb a:hover { color: var(--text); }
.tool-hero { max-width: 850px; padding: 54px 0 58px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--accent); font-size: .72rem; font-weight: 500; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow::before { width: 20px; height: 1px; background: currentColor; content: ''; }
h1, h2, h3 { font-family: 'Fraunces', Georgia, serif; }
h1 { max-width: 15ch; margin: 18px 0 22px; font-size: clamp(2.8rem, 7vw, 5.25rem); font-weight: 500; letter-spacing: -.04em; line-height: 1; }
.hero-copy { max-width: 690px; margin: 0; color: var(--muted); font-size: clamp(1rem, 2vw, 1.16rem); }

.calculator-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(290px, .85fr); gap: 18px; align-items: start; padding-bottom: 90px; }
.panel { border: 1px solid var(--border); border-radius: 22px; background: rgba(17, 18, 20, .88); box-shadow: 0 26px 70px rgba(0, 0, 0, .2); }
.panel-main { padding: clamp(24px, 4vw, 38px); }
.panel-side { position: sticky; top: 88px; overflow: hidden; }
.panel-head { margin-bottom: 28px; }
.panel-head h2 { margin: 4px 0 7px; font-size: clamp(1.6rem, 4vw, 2.25rem); font-weight: 500; letter-spacing: -.02em; }
.panel-head p { margin: 0; color: var(--muted); font-size: .9rem; }

.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
label, .field-label { color: var(--muted); font-size: .77rem; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; }
input, select {
  width: 100%;
  min-height: 50px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  outline: 0;
  background: var(--surface-2);
  color: var(--text);
  transition: border-color .18s ease, box-shadow .18s ease;
}
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .16); }
input::placeholder { color: var(--muted-2); }
.input-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.segmented { display: inline-flex; padding: 4px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-2); }
.segmented button { min-width: 86px; padding: 8px 12px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; }
.segmented button[aria-pressed="true"] { background: var(--text); color: var(--bg); }
.action-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-weight: 500;
  cursor: pointer;
  transition: transform .18s ease, background .18s ease, border-color .18s ease;
}
.button:hover { transform: translateY(-1px); background: var(--accent); color: #fff; }
.button.secondary { border-color: var(--border-strong); background: transparent; color: var(--text); }
.button.small { min-height: 42px; padding-inline: 17px; font-size: .84rem; }
.button:focus-visible, .calendar-day:focus-visible { outline: 3px solid rgba(var(--accent-rgb), .45); outline-offset: 2px; }

.result-hero { padding: 30px; background: linear-gradient(145deg, rgba(var(--accent-rgb), .2), rgba(17, 18, 20, .35)); }
.result-label { display: block; margin-bottom: 5px; color: var(--muted); font-size: .7rem; font-weight: 500; letter-spacing: .14em; text-transform: uppercase; }
.result-big { display: block; font-family: 'Fraunces', Georgia, serif; font-size: clamp(2.3rem, 6vw, 3.6rem); font-weight: 500; letter-spacing: -.04em; line-height: 1.05; }
.result-note { display: block; margin-top: 7px; color: var(--muted); font-size: .82rem; }
.result-list { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--border); }
.result-item { padding: 20px 22px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.result-item:nth-child(2n) { border-right: 0; }
.result-item strong { display: block; margin-top: 3px; font-family: 'Fraunces', Georgia, serif; font-size: 1.28rem; font-weight: 500; }
.result-empty { padding: 28px; color: var(--muted); }
.result-empty strong { display: block; margin-bottom: 6px; color: var(--text); font-family: 'Fraunces', Georgia, serif; font-size: 1.15rem; }
.hidden { display: none !important; }
.error { min-height: 22px; margin: 10px 0 0; color: #ff9585; font-size: .84rem; }

.milestones { display: grid; gap: 8px; margin-top: 24px; }
.milestone { display: flex; justify-content: space-between; gap: 18px; padding: 13px 15px; border: 1px solid var(--border); border-radius: 11px; color: var(--muted); }
.milestone strong { color: var(--text); font-weight: 500; }

.exercise-list { display: grid; gap: 10px; }
.exercise-row { display: grid; grid-template-columns: 1.4fr .65fr .65fr .8fr 42px; gap: 8px; align-items: end; padding: 14px; border: 1px solid var(--border); border-radius: 14px; }
.exercise-row label { display: grid; gap: 5px; }
.exercise-row input { min-height: 44px; }
.icon-button { display: grid; width: 42px; height: 44px; place-items: center; border: 1px solid var(--border); border-radius: 10px; background: transparent; color: var(--muted); cursor: pointer; }
.icon-button:hover { border-color: var(--border-strong); color: var(--text); }
.timer { margin-top: 34px; padding-top: 30px; border-top: 1px solid var(--border); text-align: center; }
.timer-display { margin: 12px 0 18px; font-family: 'Fraunces', Georgia, serif; font-size: clamp(3.4rem, 10vw, 6rem); font-variant-numeric: tabular-nums; letter-spacing: -.05em; line-height: 1; }
.timer-presets { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }

.calendar-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.calendar-toolbar h3 { margin: 0; font-size: 1.35rem; font-weight: 500; }
.calendar-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 7px; }
.weekday { padding: 7px 0; color: var(--muted-2); font-size: .68rem; font-weight: 500; text-align: center; text-transform: uppercase; }
.calendar-day { aspect-ratio: 1; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-2); color: var(--muted); cursor: pointer; }
.calendar-day:hover { border-color: var(--border-strong); color: var(--text); }
.calendar-day.complete { border-color: rgba(123, 198, 154, .45); background: rgba(123, 198, 154, .16); color: var(--text); }
.calendar-day.today { box-shadow: inset 0 0 0 1px var(--accent); }
.calendar-day.outside { visibility: hidden; }

.content-section { padding: 78px 0; border-top: 1px solid var(--border); }
.content-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(36px, 8vw, 100px); }
.content-grid h2 { max-width: 13ch; margin: 0; font-size: clamp(2rem, 5vw, 3.1rem); font-weight: 500; letter-spacing: -.03em; line-height: 1.08; }
.prose { color: var(--muted); }
.prose p:first-child { margin-top: 0; }
.prose h3 { margin: 28px 0 8px; color: var(--text); font-size: 1.15rem; font-weight: 500; }
.prose a { color: var(--text); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }
.steps { display: grid; gap: 12px; margin-top: 28px; padding: 0; list-style: none; counter-reset: steps; }
.steps li { position: relative; padding: 18px 18px 18px 56px; border: 1px solid var(--border); border-radius: 13px; counter-increment: steps; }
.steps li::before { position: absolute; left: 18px; color: var(--accent); content: counter(steps, decimal-leading-zero); font-size: .72rem; font-weight: 500; }
.notice { margin-top: 24px; padding: 17px 19px; border: 1px solid rgba(var(--accent-rgb), .25); border-radius: 13px; background: rgba(var(--accent-rgb), .08); color: var(--muted); font-size: .84rem; }

.app-cta { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; padding: clamp(25px, 5vw, 42px); border: 1px solid rgba(var(--accent-rgb), .3); border-radius: 22px; background: linear-gradient(135deg, rgba(var(--accent-rgb), .14), var(--surface)); }
.app-cta h2 { margin: 5px 0 8px; font-size: clamp(1.7rem, 4vw, 2.5rem); font-weight: 500; }
.app-cta p { max-width: 650px; margin: 0; color: var(--muted); }

.tools-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; padding: 0 0 100px; }
.tool-card { min-height: 230px; padding: 28px; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); transition: transform .2s ease, border-color .2s ease; }
.tool-card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
.tool-card:last-child:nth-child(odd) { grid-column: 1 / -1; }
.tool-card .number { color: var(--accent); font-size: .7rem; letter-spacing: .14em; }
.tool-card h2 { margin: 44px 0 10px; font-size: 1.55rem; font-weight: 500; }
.tool-card p { max-width: 48ch; margin: 0; color: var(--muted); font-size: .9rem; }
.tool-card .arrow { display: inline-block; margin-top: 18px; color: var(--text); font-size: .82rem; font-weight: 500; }

.footer { position: relative; z-index: 1; margin-top: 90px; border-top: 1px solid var(--border); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 34px 0; color: var(--muted-2); font-size: .76rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer a:hover { color: var(--text); }

@media (max-width: 820px) {
  .calculator-layout, .content-grid { grid-template-columns: 1fr; }
  .panel-side { position: static; }
  .app-cta { grid-template-columns: 1fr; }
  .exercise-row { grid-template-columns: 1fr 1fr 1fr; }
  .exercise-row .exercise-name { grid-column: 1 / -1; }
}
@media (max-width: 580px) {
  .wrap { width: min(calc(100% - 30px), var(--max)); }
  .nav { padding-inline: 15px; }
  .nav-links a:first-child { display: none; }
  .breadcrumb { padding-top: 28px; }
  .tool-hero { padding: 38px 0 42px; }
  .fields, .tools-grid { grid-template-columns: 1fr; }
  .tool-card:last-child:nth-child(odd) { grid-column: auto; }
  .exercise-row { grid-template-columns: 1fr 1fr; }
  .exercise-row .exercise-name { grid-column: 1 / -1; }
  .exercise-row .remove-cell { grid-column: 2; justify-self: end; }
  .result-list { grid-template-columns: 1fr; }
  .result-item { border-right: 0; }
  .calendar-grid { gap: 4px; }
  .calendar-day { border-radius: 8px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .tool-card { transition: none; }
}