/* ============================================================
   EXCAVATION SLOPE CALCULATOR — styles.css
   Clean, professional, construction-safety themed.
   ============================================================ */

/* ── CSS Custom Properties (Design Tokens) ─────────────────── */
:root {
  /* Brand Colors */
  --color-primary:       #F5A623;   /* Construction amber/yellow */
  --color-primary-dark:  #D4891A;
  --color-primary-light: rgba(245, 166, 35, 0.12);

  /* Dark Tones */
  --color-dark:          #1E2530;   /* Header / footer */
  --color-dark-2:        #2C3E50;   /* Hero gradient end */

  /* Neutral */
  --color-text:          #2D3440;
  --color-text-light:    #6B7280;
  --color-bg:            #F0F2F5;
  --color-white:         #FFFFFF;
  --color-border:        #D9DDE4;

  /* Status Colors */
  --color-warning-orange:    #E67E22;
  --color-warning-orange-bg: #FEF6EC;
  --color-warning-red:       #C0392B;
  --color-warning-red-bg:    #FDEDEC;
  --color-success:           #27AE60;
  --color-success-bg:        rgba(39, 174, 96, 0.08);

  /* Soil Classification Colors */
  --color-rock:   #7F8C8D;
  --color-type-a: #27AE60;
  --color-type-b: #E67E22;
  --color-type-c: #C0392B;

  /* Spacing & Shape */
  --radius:     8px;
  --radius-lg:  14px;
  --shadow:     0 2px 12px rgba(0, 0, 0, 0.07);
  --shadow-lg:  0 6px 28px rgba(0, 0, 0, 0.11);

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

  /* Transition */
  --transition: all 0.2s ease;
}

/* ── Reset & Base ───────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

/* ── Layout Helpers ─────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.hidden {
  display: none !important;
}

/* ================================================================
   HEADER
================================================================ */
.site-header {
  background: var(--color-dark);
  border-bottom: 3px solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 13px;
  padding-bottom: 13px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 600;
}

.logo-icon {
  font-size: 1.4rem;
}

.logo-text {
  color: rgba(255, 255, 255, 0.88);
}

.logo-text strong {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 22px;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
}

/* ================================================================
   HERO SECTION
================================================================ */
.hero {
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-2) 100%);
  color: var(--color-white);
  padding: 52px 0 44px;
  position: relative;
  overflow: hidden;
}

/* Subtle diagonal stripe texture */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -55deg,
    transparent,
    transparent 12px,
    rgba(245, 166, 35, 0.025) 12px,
    rgba(245, 166, 35, 0.025) 24px
  );
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-white);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 740px;
  margin-bottom: 24px;
  line-height: 1.75;
}

.hero-subtitle strong {
  color: var(--color-primary);
  font-weight: 600;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  background: rgba(245, 166, 35, 0.14);
  border: 1.5px solid rgba(245, 166, 35, 0.55);
  color: var(--color-primary);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* ================================================================
   AD PLACEHOLDERS
   Replace the div contents with your AdSense <ins> code
================================================================ */
.ad-placeholder {
  background: var(--color-white);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 24px 0;
  color: var(--color-text-light);
}

.ad-placeholder span {
  background: var(--color-border);
  color: var(--color-text-light);
  border-radius: 4px;
  padding: 4px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Smaller variant used inside results */
.ad-placeholder--small {
  min-height: 60px;
  margin: 16px 0 0;
}

/* ================================================================
   MAIN CONTENT
================================================================ */
.main-content {
  padding-top: 4px;
  padding-bottom: 56px;
}

/* ================================================================
   CALCULATOR CARD
================================================================ */
.calculator-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: 20px;
}

/* Card top bar */
.card-header {
  background: var(--color-dark);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.card-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.01em;
}

/* ── Unit Toggle ── */
.unit-toggle {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.unit-toggle-label {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.87rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
}

.toggle-label input[type="radio"] {
  accent-color: var(--color-primary);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

/* ── Two-column grid ── */
.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

/* ────── INPUT SIDE ────── */
.inputs-section {
  padding: 28px 28px 24px;
  border-right: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.unit-label {
  font-weight: 400;
  color: var(--color-text-light);
  font-size: 0.82rem;
  margin-left: 2px;
}

.optional {
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-light);
  font-size: 0.8rem;
}

.form-group input[type="number"],
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-white);
  transition: var(--transition);
  appearance: auto;
  -webkit-appearance: auto;
}

.form-group input[type="number"]:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Remove number input spinners on Firefox */
.form-group input[type="number"] {
  -moz-appearance: textfield;
}

/* Remove spinners on Chrome/Safari */
.form-group input[type="number"]::-webkit-outer-spin-button,
.form-group input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

/* ── Buttons ── */
.button-row {
  display: flex;
  gap: 10px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 18px;
  border-radius: var(--radius);
  border: none;
  font-size: 0.875rem;
  font-family: var(--font);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
}

/* ────── RESULTS SIDE ────── */
.results-section {
  padding: 28px 28px 24px;
}

/* Warning Callouts */
.warning-callout {
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 0.87rem;
  line-height: 1.55;
}

.warning-orange {
  background: var(--color-warning-orange-bg);
  border-left: 4px solid var(--color-warning-orange);
  color: #7A4510;
}

.warning-red {
  background: var(--color-warning-red-bg);
  border-left: 4px solid var(--color-warning-red);
  color: #7B1A1A;
}

/* Results Box */
.results-box {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 20px;
}

.results-box h3 {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  margin-bottom: 14px;
}

.result-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  gap: 12px;
}

.result-item:last-of-type {
  border-bottom: none;
  margin-bottom: 2px;
}

.result-label {
  font-size: 0.875rem;
  color: var(--color-text-light);
  flex-shrink: 0;
}

.result-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-dark);
  text-align: right;
}

/* Safety Note — green left-border callout */
.safety-note {
  margin-top: 14px;
  padding: 12px 15px;
  background: var(--color-success-bg);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: #1A5C35;
  line-height: 1.6;
}

/* ================================================================
   DISCLAIMER ASIDE
================================================================ */
.disclaimer {
  background: #FFFBEA;
  border: 1.5px solid #F0C040;
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.85rem;
  color: #5A4500;
  margin-bottom: 36px;
  line-height: 1.65;
}

/* ================================================================
   SOIL TYPES INFO SECTION
================================================================ */
.info-section {
  margin-bottom: 36px;
}

.info-section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.info-section > p {
  color: var(--color-text-light);
  margin-bottom: 22px;
  max-width: 680px;
  line-height: 1.7;
}

.soil-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.soil-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  border-top: 4px solid;
}

.soil-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 5px;
}

.slope-ratio {
  font-size: 1rem !important;
  font-weight: 700 !important;
  color: var(--color-text) !important;
  margin-bottom: 8px !important;
  line-height: 1.3;
}

.soil-card p {
  font-size: 0.83rem;
  color: var(--color-text-light);
  line-height: 1.55;
}

/* Per-type accent colors */
.soil-card--rock { border-top-color: var(--color-rock); }
.soil-card--rock h3 { color: var(--color-rock); }

.soil-card--a { border-top-color: var(--color-type-a); }
.soil-card--a h3 { color: var(--color-type-a); }

.soil-card--b { border-top-color: var(--color-type-b); }
.soil-card--b h3 { color: var(--color-type-b); }

.soil-card--c { border-top-color: var(--color-type-c); }
.soil-card--c h3 { color: var(--color-type-c); }

/* ================================================================
   HOW TO USE SECTION
================================================================ */
.how-to-section {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow);
  margin-bottom: 36px;
}

.how-to-section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.how-to-section > p {
  color: var(--color-text-light);
  margin-bottom: 18px;
}

.how-to-steps {
  list-style: none;
  counter-reset: step-counter;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 18px;
}

.how-to-steps li {
  counter-increment: step-counter;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  font-size: 0.925rem;
  line-height: 1.6;
  color: var(--color-text);
}

.how-to-steps li::before {
  content: counter(step-counter);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.8rem;
  font-weight: 800;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 1px;
}

.how-to-steps li strong {
  color: var(--color-dark);
}

.how-to-note {
  font-size: 0.875rem;
  color: #5A4500;
  background: #FFFBEA;
  border-left: 4px solid #F0C040;
  border-radius: var(--radius);
  padding: 12px 16px;
  line-height: 1.6;
}

/* ================================================================
   SLOPE REFERENCE TABLE
================================================================ */
.slope-table-wrapper {
  margin-top: 28px;
}

.slope-table-wrapper h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.slope-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  font-size: 0.9rem;
  min-width: 520px;
}

.slope-table thead {
  background: var(--color-dark);
  color: var(--color-white);
}

.slope-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.slope-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

.slope-table tbody tr:last-child td {
  border-bottom: none;
}

.slope-table tbody tr:hover {
  background: var(--color-bg);
}

.table-row--highlight td {
  background: rgba(245, 166, 35, 0.06);
}

.table-note {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin-top: 8px;
  padding-left: 4px;
}

/* ================================================================
   FAQ SECTION
================================================================ */
.faq-section {
  margin-bottom: 36px;
}

.faq-section h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.faq-item {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 16px 20px;
  text-align: left;
  font-size: 0.97rem;
  font-family: var(--font);
  font-weight: 600;
  color: var(--color-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
  line-height: 1.4;
}

.faq-question:hover {
  background: var(--color-bg);
}

.faq-question[aria-expanded="true"] {
  color: var(--color-primary-dark);
  border-bottom: 1px solid var(--color-border);
}

.faq-icon {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform 0.25s ease;
  line-height: 1;
  display: inline-block;
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

/* Accordion open/close */
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer.open {
  max-height: 500px;
}

.faq-answer p {
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.75;
}

.faq-answer strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ================================================================
   RELATED CALCULATORS
================================================================ */
.related-calculators {
  margin-bottom: 36px;
}

.related-calculators h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.related-calculators > p {
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.calc-links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.calc-link-card {
  background: var(--color-white);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--color-text);
  border: 1.5px solid transparent;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-link-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.calc-link-icon {
  font-size: 1.6rem;
  display: block;
}

.calc-link-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-dark);
  display: block;
}

.calc-link-desc {
  font-size: 0.82rem;
  color: var(--color-text-light);
  line-height: 1.4;
  display: block;
}

/* ── Coming Soon Cards ── */
.calc-link-card--coming-soon {
  background: #F3F4F6;
  border-color: transparent;
  cursor: not-allowed;
  pointer-events: none;
  user-select: none;
}

.calc-link-card--coming-soon .calc-link-icon,
.calc-link-card--coming-soon .calc-link-title,
.calc-link-card--coming-soon .calc-link-desc {
  opacity: 0.45;
}

.calc-link-card--coming-soon:hover {
  border-color: transparent;
  transform: none;
  box-shadow: var(--shadow);
}

.coming-soon-badge {
  display: inline-block;
  background: #E5E7EB;
  color: #6B7280;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 6px;
  border: 1px solid #D1D5DB;
}

/* ================================================================
   FOOTER
================================================================ */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.65);
  padding: 30px 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-footer p {
  font-size: 0.85rem;
  line-height: 1.65;
}

.site-footer strong {
  color: var(--color-primary);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  font-size: 0.82rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-link-disabled {
  color: rgba(255, 255, 255, 0.3);
  font-size: 0.82rem;
  cursor: default;
}

/* ================================================================
   LEGAL PAGES (terms.html / privacy.html)
================================================================ */

/* Mini hero for legal pages */
.legal-hero {
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-2) 100%);
  padding: 36px 0 30px;
  border-bottom: 3px solid var(--color-primary);
}

.legal-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.legal-hero-sub {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.95rem;
  max-width: 600px;
}

/* Outer wrapper */
.legal-content {
  padding-top: 36px;
  padding-bottom: 60px;
  max-width: 820px;
}

/* Effective date chip */
.legal-last-updated {
  font-size: 0.82rem;
  color: var(--color-text-light);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 16px;
  margin-bottom: 20px;
  display: inline-block;
}

/* Top alert / important notice box */
.legal-alert {
  background: #FDF2F0;
  border-left: 4px solid var(--color-warning-red);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.9rem;
  color: #6B1A1A;
  line-height: 1.65;
  margin-bottom: 32px;
}

.legal-alert strong {
  color: var(--color-warning-red);
}

/* Plain-English summary box (privacy page) */
.legal-summary-box {
  background: var(--color-success-bg);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 32px;
}

.legal-summary-box h2 {
  font-size: 1rem;
  font-weight: 700;
  color: #1A5C35;
  margin-bottom: 10px;
}

.legal-summary-box ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legal-summary-box li {
  font-size: 0.9rem;
  color: #1A5C35;
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}

.legal-summary-box li::before {
  content: '✓';
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--color-success);
}

/* Individual sections */
.legal-section {
  margin-bottom: 36px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.legal-section:last-child {
  border-bottom: none;
}

.legal-section h2 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.legal-section h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin: 18px 0 8px;
}

.legal-section p {
  font-size: 0.925rem;
  color: var(--color-text);
  line-height: 1.75;
  margin-bottom: 12px;
}

.legal-section p:last-child {
  margin-bottom: 0;
}

.legal-section ul,
.legal-section ol {
  padding-left: 20px;
  margin: 10px 0 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.legal-section li {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.65;
}

.legal-section a {
  color: var(--color-primary-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-section a:hover {
  color: var(--color-primary);
}

/* Contact box */
.legal-contact-box {
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.legal-contact-box p {
  margin: 0 !important;
  font-size: 0.9rem !important;
}

/* Legal nav row in footer */
.footer-links--legal {
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 4px;
}

/* ================================================================
   PRINT STYLES
================================================================ */
@media print {
  /* Hide non-essential elements when printing */
  .site-header,
  .hero,
  .ad-placeholder,
  .button-row,
  .nav-links,
  .unit-toggle,
  .faq-section,
  .related-calculators,
  .site-footer,
  .info-section {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .calculator-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .calculator-grid {
    grid-template-columns: 1fr 1fr;
  }

  .results-box {
    background: #f5f5f5;
  }

  .disclaimer {
    border: 1px solid #aaa;
    background: #fffde7;
  }

  .main-content {
    padding: 0;
  }
}

/* ================================================================
   RESPONSIVE — TABLET (max-width: 900px)
================================================================ */
@media (max-width: 900px) {
  .soil-cards,
  .calc-links-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ================================================================
   RESPONSIVE — MOBILE (max-width: 768px)
================================================================ */
@media (max-width: 768px) {
  /* Hide nav links on mobile — page anchor links are enough */
  .nav-links {
    display: none;
  }

  .hero {
    padding: 28px 0 24px;
  }

  /* Stack calculator inputs and results vertically */
  .calculator-grid {
    grid-template-columns: 1fr;
  }

  .inputs-section {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding: 20px 16px;
  }

  .results-section {
    padding: 20px 16px;
  }

  .card-header {
    padding: 14px 16px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .results-box {
    padding: 14px;
  }

  /* Bigger touch targets for inputs and selects on mobile */
  .form-group input[type="number"],
  .form-group select {
    padding: 13px 14px;
    font-size: 1rem;      /* 16px prevents iOS auto-zoom */
    min-height: 48px;
  }

  /* Bigger tap area for radio toggle */
  .toggle-label {
    padding: 6px 4px;
    font-size: 0.95rem;
  }

  .toggle-label input[type="radio"] {
    width: 18px;
    height: 18px;
  }

  /* Buttons fill available width in a 2-column grid on mid-mobile */
  .button-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  /* Copy button spans both columns */
  #copy-btn {
    grid-column: 1 / -1;
  }

  .btn {
    min-height: 44px;
    text-align: center;
    justify-content: center;
  }

  /* Result items: stack label above value to prevent overflow */
  .result-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 10px 0;
  }

  .result-label {
    font-size: 0.8rem;
  }

  .result-value {
    text-align: left;
    font-size: 1.05rem;
  }

  .disclaimer {
    font-size: 0.82rem;
  }

  .info-section h2,
  .faq-section h2,
  .related-calculators h2,
  .how-to-section h2 {
    font-size: 1.3rem;
  }

  .how-to-section {
    padding: 20px 18px;
  }
}

/* ================================================================
   RESPONSIVE — SMALL MOBILE (max-width: 480px)
================================================================ */
@media (max-width: 480px) {
  .hero {
    padding: 22px 0 20px;
  }

  .hero h1 {
    font-size: 1.55rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
    line-height: 1.65;
  }

  .hero-badges {
    gap: 7px;
  }

  .badge {
    font-size: 0.72rem;
    padding: 4px 10px;
  }

  .container {
    padding: 0 14px;
  }

  .soil-cards,
  .calc-links-grid {
    grid-template-columns: 1fr;
  }

  /* Buttons go single-column on very small phones */
  .button-row {
    grid-template-columns: 1fr;
  }

  #copy-btn {
    grid-column: auto;
  }

  .faq-question {
    font-size: 0.88rem;
    padding: 14px 14px;
  }

  .faq-answer p {
    padding: 14px 14px;
    font-size: 0.875rem;
  }

  /* Keep footer links readable */
  .footer-links {
    flex-direction: column;
    gap: 8px;
  }
}