/* =========================================================
   The Long Math — FINAL LOCKED STYLES
   Dark-first. Amber hierarchy. Stable layout.
   ========================================================= */

/* =========================
   THEME TOKENS
   ========================= */
:root{
  /* DARK = DEFAULT */
  --bg:#202a39;
  --text:#eef2f7;
  --muted:rgba(238,242,247,.72);

  --card:#263246;
  --card2:#1f2a3d;

  --surface:#141c2b;
  --surface2:#111827;

  --border:rgba(238,242,247,.14);
  --inputBorder:rgba(238,242,247,.12);

  --accent:#d9b46a;
  --accent2:#b99243;
  --accentSoft:rgba(217,180,106,.14);

  --shadow:0 14px 40px rgba(0,0,0,.33);
  --inset:inset 0 1px 0 rgba(255,255,255,.03);


/* Calculator-only grid (fixed 2 columns) */
.calc-grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:16px;
  margin-top:18px;
  width:100%;
}

@media (max-width:980px){
  .calc-grid{ grid-template-columns:1fr; }
}

.panel{
  padding:16px;
  border:1px solid var(--border);
  border-radius:12px;
  background:rgba(255,255,255,.03);
}

.lead{
  color:var(--muted);
  margin:0 0 12px;
  font-size:14px;
  line-height:1.5;
}


}

/* LIGHT (toggle only) */
html[data-theme="light"]{
  --bg:#f6f4ee;
  --text:#0b1b34;
  --muted:rgba(11,27,52,.72);

  --card:#ffffff;
  --card2:#f1f4f8;

  --surface:#f7f8fb;
  --surface2:#eef2f7;

  --border:rgba(11,27,52,.14);
  --inputBorder:rgba(11,27,52,.18);

  --accent:#c89a3a;
  --accent2:#9a7728;
  --accentSoft:rgba(200,154,58,.14);

  --shadow:0 10px 30px rgba(11,27,52,.08);
  --inset:inset 0 1px 0 rgba(255,255,255,.5);
}

/* =========================
   BASE
   ========================= */
*{ box-sizing:border-box; }

html{
  overflow-y:scroll;
}

body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.35;
}

a{
  color:var(--accent);
  text-decoration:none;
}
a:hover{ text-decoration:underline; }

/* Editorial / long-form: reading comfort (Substack, Medium, Stripe Docs ~1.65–1.7) */
main p{
  line-height:1.7;
}

/* =========================
   WRAP
   ========================= */
.wrap{
  max-width:980px;
  margin:0 auto;
  padding:24px 16px 48px;
}

/* Narrower content for methodology / documentation pages */
.methodology-content{
  max-width:720px;
  margin:0 auto;
}
.methodology-meta{
  font-size:13px;
  color:var(--muted);
  font-weight:400;
  margin:0 0 1em;
}

/* Article reading time (non-distracting one-liner under title) */
.reading-time{
  font-size:13px;
  color:var(--muted);
  margin:0.35em 0 0;
  font-weight:400;
}

/* Last updated (educational articles only; light, subtle) */
.article-content .last-updated{
  font-size:12px;
  color:var(--muted);
  margin:0.2em 0 0;
  font-weight:400;
}

.methodology-content .formula-block{
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Courier New",monospace;
  font-size:14px;
  line-height:1.6;
  padding:12px 14px;
  background:var(--surface2);
  border:1px solid var(--border);
  border-radius:8px;
  overflow-x:auto;
  margin:4px 0 6px;
  font-variant-numeric:tabular-nums;
}
.methodology-content .formula-block sub,
.methodology-content .formula-block sup{
  font-size:0.75em;
  line-height:0;
  position:relative;
  vertical-align:baseline;
  font-style:normal;
}
.methodology-content .formula-block sup{
  vertical-align:super;
  top:-0.35em;
}
.methodology-content .formula-block sub{
  vertical-align:sub;
  bottom:-0.2em;
}
.methodology-content .formula-meta{
  margin:0 0 4px;
  font-size:14px;
}
.methodology-content .formula-meta strong{
  font-weight:700;
}
.methodology-content h3{
  margin:1.25em 0 0;
  font-size:1.05em;
  font-weight:700;
}

/* =========================
   HEADER / BRAND
   ========================= */
.sitehead{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:14px 0 16px;
  border-bottom:1px solid var(--border);
  margin-bottom:14px;
}

.sitehead-top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:24px;
}

.brandstack{
  display:flex;
  flex-direction:column;
  gap:6px;
}

.brand{
  font-size:40px;
  font-weight:900;
  letter-spacing:.4px;
  line-height:1.05;
  color:var(--text);
}

.sigil{
  display:inline-block;
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Courier New",monospace;
  font-size:20px;
  padding:9px 11px;
  border-radius:12px;
  border:1px solid rgba(217,180,106,.45);
  background:var(--accentSoft);
  color:var(--text);
  width:fit-content;
}

.primary-nav{
  display:none;
  flex:0 1 auto;
  margin-left:auto;
}

.primary-nav-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:18px;
  font-size:14px;
}

.primary-nav-list a{
  color:var(--muted);
  text-decoration:none;
  padding:4px 0;
}

.primary-nav-list a:hover{
  text-decoration:underline;
  color:var(--accent);
}

.sitehead-meta{
  display:flex;
  justify-content:flex-end;
  align-items:center;
  gap:12px;
}

/* =========================
   THEME TOGGLE
   ========================= */
.themebox{
  display:flex;
  align-items:center;
  gap:10px;
  user-select:none;
}

.tlabel{
  font-size:13px;
  color:var(--muted);
}

.switch{
  position:relative;
  width:48px;
  height:28px;
  border-radius:999px;
  background:var(--surface2);
  border:1px solid var(--border);
  cursor:pointer;
}
.switch input{
  position:absolute;
  inset:0;
  opacity:0;
}
.knob{
  position:absolute;
  top:3px;
  left:3px;
  width:22px;
  height:22px;
  border-radius:999px;
  background:var(--card);
  border:1px solid var(--border);
  transition:transform .18s ease;
}
.switch input:checked + .knob{
  transform:translateX(20px);
}

/* =========================
   TITLES / INTRO
   ========================= */
h1{
  margin:0 0 10px;
  font-size:24px;
  font-weight:700;
  letter-spacing:.3px;
}

.lede{
  max-width:860px;
  font-size:1.1rem;
  margin-bottom:1rem;
}
.lede p{
  margin:10px 0;
  color:var(--muted);
}
.lede strong{
  color:var(--text);
  font-weight:800;
}

.muted{
  opacity:0.8;
}

.hero-lede{
  font-size:1.25rem;
  font-weight:500;
  margin-bottom:1rem;
  opacity:0.95;
}

.featured-essay{
  margin-top:2rem;
}

.essay-list{
  list-style:none;
  padding:0;
  margin:1rem 0 0 0;
}
.essay-list li{
  margin-bottom:1.5rem;
}
.essay-item{
  margin-top:1.5rem;
}
.essay-status{
  font-size:0.85rem;
  margin-left:8px;
  opacity:0.65;
}
.essay-desc{
  margin-top:0.25rem;
  opacity:0.9;
}

/* =========================
   GRID (CRITICAL)
   ========================= */

/* Default (calculators): 2-up */
.grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:16px;
  margin-top:18px;
}

/* Homepage only: 3-up cards */
.home-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:16px;
  margin-top:18px;
}

@media (max-width: 980px){
  .home-grid{ grid-template-columns:1fr; }
}

@media (max-width: 980px){
  .grid{ grid-template-columns:1fr; }
}


@media (max-width:860px){
  .grid{ grid-template-columns:1fr; }
  .sitehead-top{ flex-direction:column; align-items:flex-start; gap:10px; }
  .sitehead-meta{ justify-content:flex-start; }
}

@media (min-width: 900px){
  .primary-nav{ display:flex; }
}

/* =========================
   CARDS
   ========================= */
.card{
  background:linear-gradient(180deg,var(--card),var(--card2));
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px;
  box-shadow:var(--shadow),var(--inset);
}

.section-title{
  margin:0 0 12px;
  font-size:12px;
  color:var(--accent2);
  letter-spacing:.6px;
  text-transform:uppercase;
}

/* =========================
   INPUTS
   ========================= */
.btns{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin:10px 0 8px;
}

button{
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
  padding:10px 12px;
  border-radius:10px;
  cursor:pointer;
  font-size:13px;
}
button:hover{
  border-color:var(--accent);
}

.hint{
  margin:0 0 12px;
  font-size:12px;
  color:var(--muted);
}

.row{
  display:grid;
  grid-template-columns:1fr 190px;
  gap:10px;
  align-items:center;
  margin-bottom:12px;
}
.row label{ font-size:14px; }

input[type="number"],
input[type="text"]{
  width:100%;
  padding:10px;
  border-radius:10px;
  border:1px solid var(--inputBorder);
  background:var(--surface);
  color:var(--text);
  font-size:14px;
}

.toggle{
  display:flex;
  gap:10px;
  align-items:center;
  margin-top:10px;
  padding-top:10px;
  border-top:1px solid var(--border);
}
.toggle label{ font-size:13px; }

.helper{
  margin:-6px 0 10px;
  font-size:12px;
  color:var(--muted);
}

/* =========================
   SLIDER
   ========================= */
.slider-block{
  margin-top:6px;
  padding:12px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--surface);
}

.slider-top{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  margin-bottom:10px;
}
.slider-top .lbl{ font-size:14px; }
.slider-top .val{ font-size:13px; color:var(--muted); }

input[type="range"]{ width:100%; }

/* =========================
   RESULTS
   ========================= */
.results{
  display:grid;
  gap:12px;
}

.result{
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  background:var(--surface);
}

.result .k{
  font-size:12px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:.3px;
}

.result .v{
  font-size:20px;
  font-weight:700;
}

.result.prominent{
  border-color:rgba(217,180,106,.55);
  background:linear-gradient(180deg,rgba(217,180,106,.14),rgba(217,180,106,.06));
}

.result.prominent .k{
  color:var(--accent2);
  font-weight:700;
}

.result.prominent .v{
  font-size:32px;
  font-weight:900;
}

/* =========================
   METHODS
   ========================= */
.methods{
  margin-top:16px;
}

.methods-card{
  background:linear-gradient(180deg,var(--card),var(--card2));
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px;
  box-shadow:var(--shadow),var(--inset);
}

.methods h2{
  margin:0 0 12px;
  font-size:12px;
  color:var(--accent2);
  letter-spacing:.6px;
  text-transform:uppercase;
}

.method-item{
  padding:12px 14px;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--surface);
  margin-bottom:10px;
}

.method-item strong{
  display:block;
  margin-bottom:6px;
  font-size:13px;
  font-weight:800;
  color:var(--text);
}

/* =========================
   TABLE
   ========================= */
table{
  width:100%;
  border-collapse:collapse;
  background:var(--surface);
  border-radius:12px;
  overflow:hidden;
}

th, td{
  padding:10px;
  border:1px solid var(--border);
  font-size:13px;
}

th{
  background:var(--surface2);
  color:var(--muted);
  text-transform:uppercase;
  font-size:11px;
}

/* =========================
   FOOTER / DISCLAIMER
   ========================= */
.disclaimer{
  margin-top:24px;
  padding-top:14px;
  padding-bottom:14px;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  font-size:12px;
  color:var(--muted);
}

.site-footer{
  margin-top:40px;
  padding-top:16px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:12px;
  text-align:center;
}
.site-footer p{ margin:6px 0; }

.home-link{
  display:inline-block;
  margin-bottom:18px;
  font-size:14px;
  font-weight:600;
}

/* Inspect the Arithmetic – visible button on calculator pages */
.inspect-arithmetic-btn{
  display:inline-block;
  padding:10px 18px;
  font-size:14px;
  font-weight:600;
  color:var(--text);
  background:var(--accentSoft);
  border:1px solid var(--accent);
  border-radius:10px;
  text-decoration:none;
}
.inspect-arithmetic-btn:hover{
  text-decoration:none;
  background:rgba(217,180,106,.22);
  border-color:var(--accent2);
}

/* Results panel header: title left, Inspect button right – smaller, subtle outline */
.results-panel-header{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:8px;
}
.results-panel-header .section-title{
  margin:0;
}
.results-panel-header .inspect-buttons{
  display:flex;
  flex-direction:column;
  align-items:flex-end;
  gap:6px;
}
.results-panel-header .inspect-arithmetic-btn{
  padding:6px 12px;
  font-size:12px;
  font-weight:600;
  background:transparent;
  border:1px solid var(--border);
  color:var(--muted);
}
.results-panel-header .inspect-arithmetic-btn:hover{
  color:var(--text);
  border-color:var(--accent);
  background:var(--accentSoft);
}

/* Report an Issue button (below calculator, right side, secondary button look) */
.report-issue-wrap{
  display:flex;
  justify-content:flex-end;
  margin-top:12px;
  margin-bottom:8px;
}
.report-issue-link{
  font-size:13px;
  font-weight:600;
  color:var(--muted);
  text-decoration:none;
  border:1px solid var(--border);
  background:var(--surface);
  padding:8px 16px;
  border-radius:8px;
  display:inline-block;
  transition:color .15s, border-color .15s, background .15s;
  box-shadow:0 1px 2px rgba(0,0,0,.2);
}
.report-issue-link:hover{
  color:var(--accent);
  border-color:var(--accent);
  background:var(--accentSoft);
  text-decoration:none;
}

/* --- Methods layout to match “failed” version --- */

.methods{
  margin-top: 16px;
}

.methods-card{
  background: linear-gradient(180deg, var(--card), var(--card2));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  box-shadow: var(--shadow), var(--inset);
}

.methods h2{
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .6px;
  text-transform: uppercase;
  color: var(--accent);
}

.default-fee{
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 14px;
  align-items: start;
  padding: 14px;
  border: 1px solid rgba(217,180,106,.35);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(217,180,106,.10), rgba(217,180,106,.04));
}

html[data-theme="light"] .default-fee{
  border-color: rgba(200,154,58,.35);
  background: linear-gradient(180deg, rgba(200,154,58,.10), rgba(200,154,58,.04));
}

.default-fee h3{
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: .3px;
  text-transform: uppercase;
  color: var(--accent2);
}

.default-fee p{
  margin: 8px 0;
  color: var(--muted);
  font-size: 13px;
}

.default-note{
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.method-list{
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.method-item{
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}

.method-item strong{
  display: block;
  margin-bottom: 6px;
  color: var(--accent2);
  font-weight: 800;
  font-size: 13px;
}

.method-item div{
  color: var(--muted);
  font-size: 13px;
}

/* Calculator list semantic structure */
.calculator-list{
  margin-top: 14px;
  display: grid;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin-left: 0;
}

.calculator-card{
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
}

.calculator-card h3{
  margin: 0 0 6px;
  color: var(--accent2);
  font-weight: 800;
  font-size: 13px;
}

.calculator-card h3 a{
  color: var(--accent2);
  text-decoration: none;
}

.calculator-card h3 a:hover{
  text-decoration: underline;
}

.calculator-card p{
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.fee-table{
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: var(--surface);
  border-radius: 12px;
  overflow: hidden;
}

.fee-table th, .fee-table td{
  padding: 10px;
  border: 1px solid var(--border);
  text-align: left;
}

.fee-table th{
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .4px;
  font-size: 11px;
  background: var(--surface2);
}

.inline-note strong{
  color: var(--text);
}

@media (max-width: 900px){
  .default-fee{
    grid-template-columns: 1fr;
  }
}

/* =========================
   HOMEPAGE / NAV ADDITIONS (MATCH CALCULATOR TONE)
   ========================= */

.head-actions{
  display:flex;
  align-items:center;
  gap:12px;
}

.sep{
  border:0;
  border-top:1px solid var(--border);
  margin:18px 0;
}

/* Hamburger button */
.menu-btn{
  border:1px solid var(--accent);
  background:var(--accentSoft);
  color:var(--accent);
  width:44px;
  height:40px;
  border-radius:12px;
  cursor:pointer;
  font-size:20px;
  line-height:1;
  font-weight:700;
  transition:all 0.18s ease;
}

@media (min-width: 900px){
  .menu-btn{ display:none; }
}
.menu-btn:hover{
  border-color:var(--accent2);
  background:rgba(217,180,106,.20);
  transform:scale(1.05);
}

/* Overlay */
.menu-overlay{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.35);
  opacity:0;
  pointer-events:none;
  transition:opacity .18s ease;
  z-index:50;
}
.menu-overlay.open{
  opacity:1;
  pointer-events:auto;
}

/* Slide-out panel */
.menu-panel{
  position:fixed;
  top:0;
  right:0;
  height:100%;
  width:280px;
  max-width:85vw;
  background:linear-gradient(180deg,var(--card),var(--card2));
  border-left:1px solid var(--border);
  box-shadow:var(--shadow);
  transform:translateX(110%);
  transition:transform .18s ease;
  z-index:60;
  padding:14px;
}
.menu-panel.open{
  transform:translateX(0);
}

.menu-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:10px;
  border-bottom:1px solid var(--border);
  margin-bottom:10px;
}

.menu-title{
  font-size:14px;
  font-weight:800;
  letter-spacing:.3px;
  color:var(--text);
}

.menu-close{
  border:1px solid var(--border);
  background:var(--surface);
  color:var(--text);
  width:40px;
  height:36px;
  border-radius:12px;
  cursor:pointer;
  font-size:22px;
  line-height:1;
}
.menu-close:hover{ border-color:var(--accent); }

.menu-link{
  display:block;
  padding:12px 10px;
  border:1px solid var(--border);
  border-radius:12px;
  background:var(--surface);
  color:var(--text);
  text-decoration:none;
  margin-bottom:10px;
}
.menu-link:hover{
  border-color:var(--accent);
  text-decoration:none;
}

/* =========================
   CALCULATORS LANDING PAGE
   ========================= */
.calc-landing-grid{
  margin-top:18px;
}

.calc-landing-card{
  display:flex;
  flex-direction:column;
}

.calc-landing-card h3{
  margin:0 0 8px;
  font-size:18px;
  font-weight:700;
}

.calc-landing-desc{
  margin:0 0 12px;
  font-size:13px;
  color:var(--muted);
  line-height:1.45;
}

.calc-landing-questions{
  margin:0 0 12px;
  padding-left:18px;
  font-size:13px;
  line-height:1.6;
}

.calc-landing-questions li{
  margin-bottom:6px;
}

.calc-landing-questions a{
  color:var(--accent);
  text-decoration:none;
}

.calc-landing-questions a:hover{
  text-decoration:underline;
}

.calc-landing-browse{
  margin:0;
  font-size:12px;
}

.calc-landing-browse a{
  color:var(--muted);
  text-decoration:none;
}

.calc-landing-browse a:hover{
  color:var(--accent);
  text-decoration:underline;
}

.calc-landing-teasers{
  margin:0 0 10px;
  padding-left:18px;
  font-size:13px;
  color:var(--muted);
  line-height:1.6;
}

.calc-landing-teasers li{
  margin-bottom:8px;
}

.calc-dev-tag{
  display:inline-block;
  margin-left:6px;
  padding:2px 8px;
  font-size:11px;
  color:var(--muted);
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:6px;
}

.calc-landing-muted{
  margin:0;
  font-size:12px;
  color:var(--muted);
}

.calc-landing-dev .calc-landing-desc{
  margin-bottom:10px;
}

.calc-category-section{
  margin-top:32px;
  padding-top:24px;
  border-top:1px solid var(--border);
}

.calc-category-section:first-of-type{
  margin-top:32px;
  padding-top:24px;
  border-top:1px solid var(--border);
}

.calc-category-section h2{
  margin:0 0 8px;
  font-size:20px;
  font-weight:700;
}

.calc-category-desc{
  margin:0 0 14px;
  font-size:13px;
  color:var(--muted);
}