/* =====================================================================
   SmartNest — Shared Stylesheet
   Palette: deep green #1B4D3E (primary), warm amber #E8A33D (accent),
   off-white #FAF7F2 (background), dark slate text.
   Mobile-first. System font stack only, no external font requests.
   ===================================================================== */

:root {
  --color-primary: #1B4D3E;
  --color-primary-dark: #123329;
  --color-primary-light: #24614e;
  --color-accent: #E8A33D;
  --color-accent-dark: #c9832a;
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-text: #2A2E2B;
  --color-text-muted: #5C6460;
  --color-border: #E4DFD5;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 2px 10px rgba(27, 77, 62, 0.08);
  --shadow-card-hover: 0 8px 24px rgba(27, 77, 62, 0.14);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--color-primary); text-decoration: underline; text-decoration-color: rgba(27,77,62,0.35); text-underline-offset: 2px; }
a:hover { color: var(--color-accent-dark); }

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  line-height: 1.2;
  color: var(--color-primary-dark);
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 48px 0; }
.section-narrow { padding: 32px 0; }

/* ---------------------------------------------------------------- */
/* Header / Nav                                                      */
/* ---------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 12px;
  padding-bottom: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}
.brand:hover { color: var(--color-primary-dark); }
.brand svg { width: 32px; height: 32px; flex-shrink: 0; }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle svg { width: 22px; height: 22px; }

.site-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: none;
  flex-direction: column;
  padding: 8px 20px 16px;
}
.site-nav.is-open { display: flex; }
.site-nav a {
  padding: 10px 0;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  border-bottom: 1px solid var(--color-border);
}
.site-nav a:last-child { border-bottom: none; }
.site-nav a:hover { color: var(--color-primary); }

@media (min-width: 820px) {
  .nav-toggle { display: none; }
  .site-nav {
    position: static;
    display: flex;
    flex-direction: row;
    background: transparent;
    border: none;
    padding: 0;
    gap: 24px;
  }
  .site-nav a { border-bottom: none; padding: 6px 0; }
}

/* ---------------------------------------------------------------- */
/* Hero                                                               */
/* ---------------------------------------------------------------- */

.hero {
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: 56px 0 64px;
}
.hero h1 { color: #fff; }
.hero p.lead { color: rgba(255,255,255,0.9); font-size: 1.15rem; max-width: 640px; }
.hero .badge {
  display: inline-block;
  background: rgba(232,163,61,0.18);
  color: var(--color-accent);
  border: 1px solid rgba(232,163,61,0.4);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.page-hero {
  background: var(--color-primary);
  color: #fff;
  padding: 40px 0 44px;
}
.page-hero h1 { color: #fff; margin-bottom: 8px; }
.page-hero p { color: rgba(255,255,255,0.88); font-size: 1.05rem; max-width: 700px; margin: 0; }

/* ---------------------------------------------------------------- */
/* Buttons                                                            */
/* ---------------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}
.btn-primary { background: var(--color-accent); color: var(--color-primary-dark); }
.btn-primary:hover { background: var(--color-accent-dark); color: var(--color-primary-dark); }
.btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.12); color: #fff; }

/* ---------------------------------------------------------------- */
/* Cards / Grid                                                       */
/* ---------------------------------------------------------------- */

.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 24px;
  border: 1px solid var(--color-border);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}
@media (min-width: 640px) {
  .calc-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 980px) {
  .calc-grid { grid-template-columns: 1fr 1fr 1fr 1fr; }
}

.calc-tile {
  display: block;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 22px;
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}
.calc-tile:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); color: var(--color-text); }
.calc-tile .icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(27,77,62,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.calc-tile .icon-wrap svg { width: 28px; height: 28px; color: var(--color-primary); }
.calc-tile h3 { margin-bottom: 6px; font-size: 1.1rem; }
.calc-tile p { color: var(--color-text-muted); font-size: 0.92rem; margin: 0; }

/* ---------------------------------------------------------------- */
/* Calculator card                                                    */
/* ---------------------------------------------------------------- */

.calculator {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  padding: 24px;
  margin-top: -40px;
  position: relative;
  z-index: 5;
}
@media (min-width: 640px) { .calculator { padding: 32px; } }

.calc-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 640px) {
  .calc-form { grid-template-columns: 1fr 1fr; }
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 700; font-size: 0.92rem; color: var(--color-primary-dark); }
.field .hint { font-size: 0.8rem; color: var(--color-text-muted); font-weight: 400; }

.field input[type="number"],
.field input[type="text"],
.field select {
  padding: 11px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  font-family: var(--font-sans);
}
.field input:focus, .field select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.field-checkbox {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}
.field-checkbox input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--color-primary); }
.field-checkbox label { font-weight: 600; }

.field-radio-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.field-radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.92rem;
}
.field-radio-group input { accent-color: var(--color-primary); }

.calc-result {
  margin-top: 24px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  color: #fff;
  text-align: center;
}
.calc-result .result-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.75);
  margin-bottom: 6px;
}
.calc-result .result-range {
  font-size: clamp(1.7rem, 5vw, 2.4rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}
.calc-result .result-typical {
  font-size: 1rem;
  color: rgba(255,255,255,0.9);
}
.calc-result .result-typical strong { color: var(--color-accent); }

/* ---------------------------------------------------------------- */
/* Ad slot                                                            */
/* ---------------------------------------------------------------- */

.ad-slot {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(45deg, #f1efe9, #f1efe9 10px, #ece9e1 10px, #ece9e1 20px);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  color: #9a9a94;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 32px 0;
}

/* ---------------------------------------------------------------- */
/* Article content                                                    */
/* ---------------------------------------------------------------- */

.article {
  max-width: 860px;
}
.article h2 { margin-top: 1.6em; }
.article h2:first-child { margin-top: 0; }
.article ul, .article ol { padding-left: 1.4em; }
.article li { margin-bottom: 0.4em; }

.cost-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: 0.95rem;
}
.cost-table th, .cost-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
}
.cost-table th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
}
.cost-table tr:last-child td { border-bottom: none; }
.cost-table tr:nth-child(even) td { background: rgba(27,77,62,0.03); }

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.tip-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5em;
  display: grid;
  gap: 12px;
}
.tip-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
}
.faq-item:first-child { padding-top: 0; }
.faq-item h3 { margin-bottom: 8px; font-size: 1.05rem; }
.faq-item p { margin: 0; color: var(--color-text-muted); }

/* Related calculators */
.related-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 20px 0 8px;
}
@media (min-width: 640px) { .related-strip { grid-template-columns: repeat(3, 1fr); } }
.related-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
}
.related-card:hover { border-color: var(--color-accent); color: var(--color-primary-dark); }
.related-card span { display: block; font-weight: 400; color: var(--color-text-muted); font-size: 0.85rem; margin-top: 4px; }

.disclaimer-box {
  background: rgba(232,163,61,0.12);
  border: 1px solid rgba(232,163,61,0.35);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  font-size: 0.9rem;
  color: var(--color-text);
  margin: 24px 0;
}
.updated-line {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.breadcrumbs {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 12px;
}
.breadcrumbs a { color: rgba(255,255,255,0.85); text-decoration: underline; }
.breadcrumbs a:hover { color: #fff; }

/* How it works / trust section on homepage */
.trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 24px;
}
@media (min-width: 780px) { .trust-grid { grid-template-columns: 1fr 1fr; } }

/* ---------------------------------------------------------------- */
/* Footer                                                             */
/* ---------------------------------------------------------------- */

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.85);
  padding: 44px 0 28px;
  margin-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}
.site-footer h4 { color: #fff; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }
.site-footer .brand { color: #fff; margin-bottom: 10px; }
.site-footer p { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.footer-nav { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 8px; }
.footer-nav a { color: rgba(255,255,255,0.78); text-decoration: none; font-size: 0.92rem; }
.footer-nav a:hover { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  margin-top: 32px;
  padding-top: 20px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  justify-content: space-between;
}
.footer-disclaimer {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
  margin-top: 18px;
  line-height: 1.5;
}

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}