/* ════════════════════════════════════════════════════════════
   tools.css - layout primitives shared by all 7 calculator pages
   Loaded after site.css. Dark surfaces + lime accents.
   ════════════════════════════════════════════════════════════ */

/* ── PAGE SHELL ──────────────────────────────────────── */
.tool-page { max-width: 880px; margin: 0 auto; padding: 0 24px; }
.tool-section { margin-top: 56px; }
.tool-section > h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800; letter-spacing: -1px; line-height: 1.1;
  margin-bottom: 24px; text-wrap: balance;
}

/* ── HERO ────────────────────────────────────────────── */
.tool-hero { padding: 132px 0 12px; }
.tool-hero .eyebrow {
  font-size: 11px; font-weight: 600; letter-spacing: 2.5px;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 18px; display: flex; align-items: center; gap: 10px;
}
.tool-hero .eyebrow::before {
  content: ''; display: block; width: 28px; height: 1.5px; background: var(--accent);
}
.tool-hero h1 {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 800; line-height: 1.02; letter-spacing: -2px;
  margin-bottom: 16px; text-wrap: balance;
}
.tool-hero .sub {
  font-size: 18px; line-height: 1.6; color: rgba(255,255,255,0.5); max-width: 580px;
}
/* the breadcrumb is a <nav>; undo site.css's fixed top-bar nav styling */
nav.breadcrumb {
  position: static; display: block; height: auto; padding: 0;
  background: none; backdrop-filter: none; border-bottom: none;
}
.breadcrumb { font-size: 12px; color: var(--text-3); margin-bottom: 22px; }
.breadcrumb a { color: var(--text-2); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }

/* ── CALCULATOR CARD ─────────────────────────────────── */
.calc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  margin-top: 34px;
}
.calc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 20px;
}
.calc-grid .span-2 { grid-column: 1 / -1; }
@media (max-width: 620px) { .calc-grid { grid-template-columns: 1fr; } }

/* two capped number fields that should sit together (packed left) rather than
   spread across the 2-col grid, which leaves a dead gap between them */
.field-pair { display: flex; flex-wrap: wrap; gap: 18px 20px; }
.field-pair > .field { flex: 0 1 220px; }
.field-pair > .field-grow { flex: 1 1 240px; }   /* a select/wide control in the pair fills the rest */

/* ── FIELDS ──────────────────────────────────────────── */
.field { display: flex; flex-direction: column; gap: 8px; }
.field[hidden] { display: none; }  /* display:flex above beats the UA [hidden] rule without this */
.field > label {
  font-size: 11px; font-weight: 700; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--text-2);
}
.field input[type="number"],
.field input[type="text"],
.field select {
  width: 100%;
  background: var(--input);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 13px 14px;
  color: var(--text);
  font-family: var(--font);
  font-size: 16px; font-weight: 600;
  transition: border-color 160ms;
  appearance: none;
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--accent);
}
.field input::placeholder { color: var(--text-3); font-weight: 500; }
/* strip the native number spinner — the unit chip + custom ± steppers replace it */
.field input[type="number"] { -moz-appearance: textfield; appearance: textfield; }
.field input[type="number"]::-webkit-outer-spin-button,
.field input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.field select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat; background-position: right 14px center;
  padding-right: 38px; cursor: pointer;
}
.field .hint { font-size: 11px; color: var(--text-3); }

/* input with a trailing unit chip (recessed pill, like the app) */
.input-affix { position: relative; }
.input-affix .affix {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  display: flex; align-items: center;
  padding: 5px 9px; border-radius: 7px; background: var(--elevated);
  font-size: 12px; font-weight: 700; letter-spacing: 0.3px;
  color: var(--text-2); pointer-events: none;
}
.input-affix input { padding-right: 48px; }

/* ── SEGMENTED CONTROLS (unit toggle, sex, goal…) ─────── */
.segmented {
  display: inline-flex; gap: 4px;
  background: var(--input);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 4px;
}
.segmented.fill { display: flex; }
.segmented button {
  flex: 1; border: none; background: transparent;
  color: var(--text-2); font-family: var(--font);
  font-size: 13px; font-weight: 700; letter-spacing: 0.3px;
  padding: 9px 16px; border-radius: 7px; cursor: pointer;
  transition: background 160ms, color 160ms; white-space: nowrap;
}
.segmented button[aria-pressed="true"] { background: var(--accent); color: #181818; }

/* compact unit toggle that sits in the hero / next to a field */
.unit-toggle { display: inline-flex; }
/* keep it content-width — the column .field would otherwise stretch it full width */
.field .unit-toggle { align-self: flex-start; }

/* ── ± STEPPERS (wrap a number field, injected by stepper.js) ── */
/* one unified control: [ − | value | + ] sharing a single frame */
.stepper {
  display: flex; align-items: stretch;
  background: var(--input);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 160ms;
}
.stepper:focus-within { border-color: var(--accent); }
.stepper > .input-affix,
.stepper > input { flex: 1 1 auto; min-width: 0; }
/* the .stepper is the frame now — the inner input drops its own box */
.stepper input { border: none; border-radius: 0; background: transparent; }
.step-btn {
  flex: 0 0 46px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; color: var(--text-2);
  font-family: var(--font); font-size: 22px; font-weight: 400; line-height: 1;
  cursor: pointer; user-select: none;
  transition: background 160ms, color 160ms;
}
.step-btn:first-child { border-right: 1px solid var(--border); }
.step-btn:last-child { border-left: 1px solid var(--border); }
.step-btn:hover { background: var(--elevated); color: var(--text); }
.step-btn:active { background: var(--border); }
/* Content-sized on desktop: a weight/rep value is a few digits, so a full-column
   control misreads as "type a lot" and leaves a dead gap before the unit chip.
   Cap the width and center the value between the − / + buttons. On phones the
   single-column grid reads fine, so the cap is released below (620px query). */
.stepper { max-width: 220px; }
.stepper input { text-align: center; }

/* ── BUTTONS ─────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font); font-size: 15px; font-weight: 700; letter-spacing: 0.2px;
  padding: 14px 26px; border-radius: 10px; border: none; cursor: pointer;
  text-decoration: none; transition: background 160ms, transform 160ms, border-color 160ms;
}
.btn-primary { background: var(--accent); color: #181818; }
.btn-primary:hover { background: var(--accent-d); }
.btn-ghost { background: transparent; color: var(--text-2); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--text-3); }
.calc-actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

/* ── RESULT PANEL ────────────────────────────────────── */
.calc-result {
  margin-top: 20px;
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 26px;
}
.calc-result[hidden] { display: none; }
.result-big {
  font-size: clamp(40px, 7vw, 64px); font-weight: 800;
  letter-spacing: -2px; line-height: 1; color: var(--accent);
}
.result-big .unit { font-size: 0.4em; color: var(--text-2); font-weight: 700; letter-spacing: 0; }
.result-label {
  font-size: 11px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--text-3); margin-bottom: 10px;
}
.result-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px; margin-top: 22px;
}
.result-cell {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
}
.result-cell .k { font-size: 11px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--text-3); }
.result-cell .v { font-size: 24px; font-weight: 800; letter-spacing: -0.5px; margin-top: 6px; }
.result-cell .v small { font-size: 13px; color: var(--text-2); font-weight: 700; }
.result-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 13px 0; border-bottom: 1px solid var(--border);
}
.result-row:last-child { border-bottom: none; }
.result-row .k { color: var(--text-2); font-size: 14px; }
.result-row .v { font-weight: 700; font-size: 15px; }
.note {
  margin-top: 16px; padding: 12px 14px; border-radius: 10px;
  background: rgba(212,255,0,0.06); border: 1px solid rgba(212,255,0,0.2);
  font-size: 13px; line-height: 1.55; color: rgba(255,255,255,0.7);
}
.note.warn { background: rgba(255,215,0,0.06); border-color: rgba(255,215,0,0.25); }
.note.error { background: rgba(255,90,90,0.08); border-color: rgba(255,90,90,0.3); }

/* result data tables (warm-up sets, %1RM, rep-max…) */
.result-table { width: 100%; border-collapse: collapse; margin-top: 8px; font-variant-numeric: tabular-nums; }
.result-table th, .result-table td {
  text-align: left; padding: 11px 12px; font-size: 14px;
  border-bottom: 1px solid var(--border);
}
.result-table th {
  font-size: 10px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-3);
}
.result-table td { color: rgba(255,255,255,0.85); }
.result-table tr.is-working td { background: rgba(212,255,0,0.06); color: var(--text); font-weight: 700; }
.result-table .accent { color: var(--accent); font-weight: 700; }

/* ── VIZ ─────────────────────────────────────────────── */
.viz { margin-top: 22px; }
.viz svg { width: 100%; height: auto; display: block; border-radius: 12px; }

/* barbell plate viz (plate calculator) — app-style loaded sleeve + colour legend */
.barbell-viz {
  display: flex; align-items: center; gap: 24px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px 22px 20px 0; overflow: hidden;
}
.barbell-figure { flex: 1 1 0; min-width: 0; display: flex; align-items: center; }
/* the bar shaft's left segment — grows to fill the gap so the bar reaches the edge
   while the plate SVG stays centered; butts flush against the SVG's (clipped) shaft */
.barbell-lead {
  flex: 1 1 0; min-width: 40px; height: 24px;
  background: #6E6E6E; border-radius: 4px 0 0 4px;
  display: flex; align-items: center; justify-content: center;
  color: #FFFFFF; font-family: var(--font); font-weight: 700; font-size: 13px;
  overflow: hidden;
}
.barbell-spacer { flex: 1 1 0; }
.barbell-viz .barbell-svg { flex: 0 0 auto; width: auto; max-width: 100%; height: auto; border-radius: 0; }
.barbell-svg text { font-family: var(--font); font-weight: 700; }
.plate-legend { flex: 0 0 auto; list-style: none; display: flex; flex-direction: column; gap: 12px; }
.plate-legend li { display: flex; align-items: center; gap: 14px; font-size: 26px; font-weight: 800; color: var(--text); letter-spacing: -0.5px; }
.plate-legend .lg-n { min-width: 20px; color: var(--text-2); font-weight: 700; }
.plate-legend .lg-dot { width: 13px; height: 13px; border-radius: 50%; flex: none; }
.plate-legend .lg-foot { margin-top: 4px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.2px; color: var(--text-3); }
@media (max-width: 620px) {
  .barbell-viz { flex-direction: column; align-items: stretch; gap: 16px; padding: 18px; }
  .barbell-figure { width: 100%; }
  .plate-legend { flex-direction: row; flex-wrap: wrap; justify-content: center; gap: 10px 20px; }
  .plate-legend .lg-foot { width: 100%; justify-content: center; margin-top: 0; }
}

/* ── HOW IT WORKS (prose) ────────────────────────────── */
.prose { color: rgba(255,255,255,0.7); line-height: 1.7; font-size: 16px; }
.prose p { margin-bottom: 16px; }
.prose h3 { font-size: 18px; font-weight: 800; color: var(--text); margin: 24px 0 10px; }
.prose ul { margin: 0 0 16px 20px; }
.prose li { margin-bottom: 8px; }
.prose code, .formula {
  font-family: "Courier New", monospace; font-size: 14px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 2px 7px; color: var(--accent);
}
.formula {
  display: block; padding: 16px 18px; margin: 8px 0 18px;
  color: rgba(255,255,255,0.85); line-height: 1.7; overflow-x: auto;
}
.formula b { color: var(--accent); }

/* ── FAQ (native details/summary) ────────────────────── */
.faq { margin-top: 12px; border-top: 1px solid var(--border); }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 36px 20px 0; position: relative;
  font-size: 17px; font-weight: 700; color: var(--text); letter-spacing: -0.2px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+'; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-size: 22px; font-weight: 400; color: var(--accent); transition: transform 200ms;
}
.faq details[open] summary::after { content: '\2212'; }
.faq .faq-a { padding: 0 0 22px; color: rgba(255,255,255,0.6); line-height: 1.7; font-size: 15px; }
.faq .faq-a p { margin-bottom: 12px; }
.faq .faq-a p:last-child { margin-bottom: 0; }

/* ── APP CTA ─────────────────────────────────────────── */
.app-cta {
  margin-top: 64px;
  background: linear-gradient(135deg, var(--surface), var(--elevated));
  border: 1px solid var(--border); border-radius: 22px;
  padding: 44px 40px; text-align: center;
}
.app-cta h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; letter-spacing: -1px; margin-bottom: 12px; text-wrap: balance; }
.app-cta p { font-size: 16px; color: rgba(255,255,255,0.55); max-width: 460px; margin: 0 auto 26px; line-height: 1.6; }
.app-cta .gplay-btn { margin: 0 auto; }

/* ── RELATED TOOLS ───────────────────────────────────── */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
@media (max-width: 620px) { .related-grid { grid-template-columns: 1fr; } }
.related-card {
  background: var(--elevated); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px; text-decoration: none; color: inherit;
  transition: border-color 200ms, transform 200ms;
}
.related-card:hover { border-color: rgba(212,255,0,0.35); transform: translateY(-3px); }
.related-card .rt-tag { font-size: 10px; font-weight: 700; letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-3); }
.related-card .rt-title { font-size: 16px; font-weight: 800; letter-spacing: -0.3px; margin-top: 8px; }
.related-card:hover .rt-title { color: var(--accent); }

.tool-page-foot { margin-top: 72px; }

/* ── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 620px) {
  /* long labels (e.g. "Enter squat / bench / deadlift") force page overflow when nowrap */
  .segmented button { white-space: normal; line-height: 1.3; }
  /* full-width unit toggle reads fine on a single-column phone layout */
  .field .unit-toggle { align-self: stretch; }
  /* let steppers fill the single column on phones (desktop cap looks fine here) */
  .stepper { max-width: none; }
  .field-pair > .field { flex-basis: 100%; }   /* stack the pair full-width on phones */
  .calc { padding: 22px 18px; }
  .calc-result { padding: 20px 18px; }
  .app-cta { padding: 36px 24px; }
}