*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-bg: #F0EBE1;
  --content-bg: #FFFDF8;
  --border:     #D5CBBC;
  --border-lt:  #E5DDD0;
  --ink:        #2C1810;
  --ink-mid:    #3D2E1E;
  --ink-soft:   #9A8070;
  --cedar:      #A0522D;
  --cedar-lt:   #EDE0D0;
  --cedar-dk:   #7A3D20;
  --sidebar-w:  210px;
  --font-d: 'Lora', Georgia, serif;
  --font-b: 'Inter', system-ui, sans-serif;
  --font-m: 'DM Mono', monospace;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-b);
  font-size: 16px;
  line-height: 1.72;
  color: var(--ink-mid);
  background: var(--sidebar-bg);
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ── */
.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-w); height: 100vh;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  z-index: 100; overflow-y: auto;
}

.sidebar-header {
  padding: 24px 18px 18px;
  border-bottom: 1px solid var(--border);
}
.sidebar-header a { text-decoration: none; }
.sidebar-header::after {
  content: ''; display: block;
  width: 24px; height: 2px;
  background: var(--cedar);
  margin-top: 12px; border-radius: 1px;
}
.site-title {
  font-family: var(--font-d);
  font-size: 0.95rem; font-weight: 700;
  color: var(--ink); line-height: 1.3; margin-bottom: 3px;
}
.site-sub {
  font-size: 0.62rem; color: var(--ink-soft);
  letter-spacing: 0.07em; text-transform: uppercase;
  font-family: var(--font-m);
}

.section-group-label {
  font-family: var(--font-m);
  font-size: 0.58rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-soft);
  padding: 16px 18px 6px;
}

nav a {
  display: flex; align-items: baseline; gap: 9px;
  padding: 7px 18px; text-decoration: none;
  color: var(--ink-soft); font-size: 0.8rem; font-family: var(--font-b);
  border-left: 2px solid transparent;
  transition: color 0.13s, background 0.13s;
}
nav a:hover { color: var(--cedar); background: var(--cedar-lt); border-left-color: var(--cedar); }
nav a.active { color: var(--ink); background: var(--cedar-lt); border-left-color: var(--cedar); font-weight: 600; }
nav a .step-num { font-family: var(--font-m); font-size: 0.6rem; color: var(--border); min-width: 18px; flex-shrink: 0; }
nav a:hover .step-num, nav a.active .step-num { color: var(--cedar); }

/* ── MAIN ── */
.main {
  margin-left: var(--sidebar-w); flex: 1; min-width: 0;
  background: var(--content-bg);
  border-left: 1px solid var(--border);
}

.page-content { max-width: 680px; margin: 0 auto; padding: 68px 48px 96px; }

/* Eyebrow */
.eyebrow {
  font-family: var(--font-m); font-size: 0.65rem;
  color: var(--cedar); letter-spacing: 0.1em; text-transform: uppercase;
  margin-bottom: 11px; display: flex; align-items: center; gap: 8px;
}
.eyebrow::after { content: ''; width: 24px; height: 1px; background: var(--cedar); opacity: 0.4; }

h1 {
  font-family: var(--font-d); font-size: 2.5rem; font-weight: 700;
  line-height: 1.12; letter-spacing: -0.02em; color: var(--ink); margin-bottom: 0;
}
.hero-rule {
  width: 0; height: 2px; background: var(--cedar);
  margin: 18px 0 22px; border-radius: 1px;
  animation: ruleIn 0.8s cubic-bezier(0.16,1,0.3,1) 0.15s forwards;
}
@keyframes ruleIn { to { width: 56px; } }

h2 {
  font-family: var(--font-d); font-size: 1.35rem; font-weight: 600;
  color: var(--ink); margin: 48px 0 12px; padding-top: 44px;
  border-top: 1px solid var(--border-lt);
}
h2:first-of-type { margin-top: 28px; padding-top: 0; border-top: none; }
h3 { font-family: var(--font-d); font-size: 1.05rem; font-weight: 600; color: var(--ink); margin: 26px 0 6px; }

.lead { font-size: 1.05rem; line-height: 1.72; color: var(--ink-mid); margin-bottom: 24px; font-weight: 300; }
p { margin-bottom: 16px; color: var(--ink-mid); font-size: 0.95rem; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0 0 16px 20px; color: var(--ink-mid); font-size: 0.95rem; }
li { margin-bottom: 6px; }
strong { color: var(--ink); font-weight: 600; }
a { color: var(--cedar); text-decoration: none; }
a:hover { color: var(--cedar-dk); text-decoration: underline; }

.callout {
  background: var(--cedar-lt); border-left: 3px solid var(--cedar);
  padding: 16px 20px; margin: 26px 0; border-radius: 0;
}
.callout-label {
  font-family: var(--font-m); font-size: 0.62rem; color: var(--cedar-dk);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 8px; font-weight: 500;
}
.callout p { font-size: 0.91rem; margin-bottom: 7px; color: var(--ink); }
.callout p:last-child { margin-bottom: 0; }
.callout ul { margin-bottom: 0; color: var(--ink); font-size: 0.91rem; }
.callout li { color: var(--ink); }

table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 0.86rem; }
th {
  text-align: left; padding: 9px 12px;
  background: var(--sidebar-bg);
  font-family: var(--font-m); font-size: 0.64rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  color: var(--ink-soft); border-bottom: 2px solid var(--border);
}
td { padding: 10px 12px; border-bottom: 1px solid var(--border-lt); color: var(--ink-mid); vertical-align: top; }
td:first-child { color: var(--ink); font-weight: 500; }
tr:last-child td { border-bottom: none; }

.checklist { list-style: none; padding: 0; margin: 16px 0; }
.checklist li {
  display: flex; gap: 9px; padding: 9px 0;
  border-bottom: 1px solid var(--border-lt);
  font-size: 0.91rem; color: var(--ink-mid); align-items: flex-start;
}
.checklist li::before { content: '☐'; color: var(--cedar); font-size: 1rem; flex-shrink: 0; line-height: 1.5; }

code {
  font-family: var(--font-m); font-size: 0.8rem;
  background: var(--sidebar-bg); color: var(--cedar-dk);
  padding: 2px 6px; border-radius: 3px; border: 1px solid var(--border);
}

.photo-placeholder {
  width: 100%; aspect-ratio: 16/7;
  background: var(--sidebar-bg); border: 1px dashed var(--border); border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  margin: 26px 0; color: var(--ink-soft);
  font-family: var(--font-m); font-size: 0.67rem;
  letter-spacing: 0.08em; text-transform: uppercase;
}

/* ── CALCULATOR ── */
.calc-block {
  background: var(--sidebar-bg); border: 1px solid var(--border);
  border-top: 3px solid var(--cedar); border-radius: 0 0 4px 4px;
  padding: 22px 24px 20px; margin: 34px 0;
}
.calc-title {
  font-family: var(--font-m); font-size: 0.64rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--cedar); margin-bottom: 16px;
  display: flex; align-items: center; gap: 6px;
}
.calc-title::before { content: '⌗'; opacity: 0.7; }
.calc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-bottom: 20px; }
.calc-field { display: flex; flex-direction: column; gap: 4px; }
.calc-field label { font-family: var(--font-m); font-size: 0.62rem; color: var(--ink-soft); letter-spacing: 0.06em; text-transform: uppercase; }
.calc-field input, .calc-field select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 3px;
  background: var(--content-bg); font-family: var(--font-m); font-size: 0.85rem;
  color: var(--ink); width: 100%; transition: border-color 0.13s;
  -moz-appearance: textfield;
}
.calc-field input::-webkit-inner-spin-button, .calc-field input::-webkit-outer-spin-button { -webkit-appearance: none; }
.calc-field input:focus, .calc-field select:focus { outline: none; border-color: var(--cedar); box-shadow: 0 0 0 3px rgba(160,82,45,0.1); }
.calc-hint { font-size: 0.69rem; color: var(--ink-soft); margin-top: 2px; font-family: var(--font-m); }
.calc-results { background: var(--content-bg); border: 1px solid var(--border); border-radius: 3px; min-height: 68px; }
.calc-results-empty {
  display: flex; align-items: center; justify-content: center;
  padding: 24px; color: var(--ink-soft);
  font-family: var(--font-m); font-size: 0.71rem; letter-spacing: 0.04em;
}
.calc-saved { font-family: var(--font-m); font-size: 0.69rem; color: var(--cedar); margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.calc-saved a { color: inherit; text-decoration: underline; }
.calc-note { font-size: 0.75rem; color: var(--ink-soft); font-style: italic; margin-top: 10px; }

/* ── PREV/NEXT ── */
.page-nav { display: flex; gap: 12px; margin-top: 64px; padding-top: 28px; border-top: 2px solid var(--border); }
.page-nav a {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 18px; text-decoration: none; color: inherit;
  border: 1px solid var(--border); border-radius: 4px;
  flex: 1; max-width: 48%; background: var(--content-bg);
  transition: border-color 0.13s, background 0.13s, transform 0.11s;
}
.page-nav a:hover { border-color: var(--cedar); background: var(--cedar-lt); transform: translateY(-2px); text-decoration: none; }
.page-nav a.next { text-align: right; margin-left: auto; }
.page-nav a.prev { margin-right: auto; }
.page-nav .nav-dir { font-family: var(--font-m); font-size: 0.6rem; color: var(--ink-soft); letter-spacing: 0.08em; text-transform: uppercase; }
.page-nav .nav-title { font-family: var(--font-d); font-size: 0.92rem; font-weight: 600; color: var(--ink); line-height: 1.3; }
.page-nav a:hover .nav-title { color: var(--cedar-dk); }

/* ── HOME CARDS ── */
.steps-group { margin-bottom: 38px; }
.steps-group-label {
  font-family: var(--font-m); font-size: 0.6rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--ink-soft);
  padding-bottom: 9px; margin-bottom: 12px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.steps-group-label::before { content: ''; width: 14px; height: 2px; background: var(--cedar); border-radius: 1px; flex-shrink: 0; }
.step-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(185px, 1fr)); gap: 10px; }
.step-card {
  display: flex; flex-direction: column; gap: 6px;
  padding: 17px 16px 14px; border: 1px solid var(--border); border-radius: 4px;
  text-decoration: none; color: inherit; background: var(--content-bg);
  transition: border-color 0.14s, background 0.14s, transform 0.11s;
  position: relative; overflow: hidden;
}
.step-card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 100%; height: 2px; background: var(--cedar);
  transform: scaleX(0); transform-origin: left; transition: transform 0.18s ease;
}
.step-card:hover::before { transform: scaleX(1); }
.step-card:hover { border-color: var(--cedar); background: var(--cedar-lt); transform: translateY(-2px); }
.card-num { font-family: var(--font-m); font-size: 0.6rem; color: var(--border); }
.step-card:hover .card-num { color: var(--cedar); }
.card-title { font-family: var(--font-d); font-size: 0.93rem; font-weight: 600; color: var(--ink); line-height: 1.3; }
.step-card:hover .card-title { color: var(--cedar-dk); }
.card-desc { font-size: 0.77rem; color: var(--ink-soft); line-height: 1.5; margin-top: 1px; }

/* ── MOBILE ── */
.mobile-nav-toggle {
  display: none; position: fixed; top: 12px; left: 12px; z-index: 200;
  background: var(--ink); border: none; border-radius: 4px;
  padding: 8px 12px; font-size: 0.75rem; font-family: var(--font-m);
  cursor: pointer; color: var(--sidebar-bg);
}
@media (max-width: 768px) {
  body { flex-direction: column; }
  .sidebar { position: fixed; width: 100%; height: auto; max-height: 0; overflow: hidden; border-right: none; border-bottom: 1px solid var(--border); transition: max-height 0.3s ease; }
  .sidebar.open { max-height: 100vh; overflow-y: auto; }
  .main { margin-left: 0; padding-top: 50px; border-left: none; }
  .mobile-nav-toggle { display: block; }
  .page-content { padding: 36px 20px 60px; }
  h1 { font-size: 1.9rem; }
  h2 { font-size: 1.2rem; }
  .page-nav { flex-direction: column; }
  .page-nav a { max-width: 100%; }
  .page-nav a.next { text-align: left; }
}