/* ============================================
   TimeToWalk.net — Shared Design System
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Brand Colours */
  --green: #2E7D5C;
  --green-light: #3D9E74;
  --green-dark: #1E5C41;
  --green-pale: #EAF5F0;
  --green-mid: #C8E8DA;

  /* Neutrals */
  --bg: #F7F9F8;
  --white: #FFFFFF;
  --border: #D8E5DF;
  --text: #1A2820;
  --text-muted: #5A7066;
  --text-light: #8FA89F;

  /* Accents */
  --amber: #E8933A;
  --amber-light: #FDF3E7;

  /* Typography */
  --font-head: 'Outfit', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;

  /* Sizing */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 2px 12px rgba(30,88,65,0.08);
  --shadow-md: 0 4px 24px rgba(30,88,65,0.12);
  --shadow-lg: 0 8px 40px rgba(30,88,65,0.15);

  /* Layout */
  --max-w: 860px;
  --max-w-wide: 1100px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; display: block; }
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  line-height: 1.2;
  color: var(--text);
  font-weight: 700;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.1rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.1rem; font-weight: 600; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container-wide {
  width: 100%;
  max-width: var(--max-w-wide);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 4rem 0;
}

.section-sm {
  padding: 2.5rem 0;
}

/* --- Navigation --- */
.site-nav {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 1px 8px rgba(30,88,65,0.06);
  /* Needed so mobile dropdown anchors to the nav bar */
  isolation: isolate;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.25rem;
  max-width: var(--max-w-wide);
  margin: 0 auto;
}

.nav-logo {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--green);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-logo span { color: var(--text); }

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* --- Hero --- */
.hero {
  background: linear-gradient(160deg, var(--green-dark) 0%, var(--green) 60%, var(--green-light) 100%);
  color: white;
  padding: 4rem 1.25rem 5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

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

.hero-eyebrow {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.9);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  color: white;
  max-width: 700px;
  margin: 0 auto 1rem;
}

.hero-sub {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.85);
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

/* --- Calculator Card --- */
.calc-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
  max-width: 680px;
  margin: 0 auto;
  text-align: left;
}

.calc-card.hero-calc {
  margin-top: -1rem;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.calc-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.calc-group.full { grid-column: 1 / -1; }

.calc-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-row {
  display: flex;
  gap: 0.5rem;
}

.calc-input, .calc-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.2s;
  appearance: none;
  -webkit-appearance: none;
}

.calc-input:focus, .calc-select:focus {
  outline: none;
  border-color: var(--green);
}

.calc-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235A7066' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.unit-select {
  width: auto;
  min-width: 90px;
  flex-shrink: 0;
}

/* Optional toggles */
.calc-optional {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 0.25rem;
}

.optional-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 1rem;
  user-select: none;
}

.optional-toggle svg { transition: transform 0.2s; }
.optional-toggle.open svg { transform: rotate(180deg); }

.optional-fields {
  display: none;
  gap: 1.25rem;
  grid-template-columns: 1fr 1fr;
}

.optional-fields.visible { display: grid; }

/* Results */
.calc-results {
  background: var(--green-pale);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1.25rem;
}

.result-primary {
  text-align: center;
  margin-bottom: 1.25rem;
}

.result-time {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 800;
  color: var(--green);
  line-height: 1;
}

.result-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.result-item {
  background: var(--white);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  text-align: center;
}

.result-item-val {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}

.result-item-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* --- Pace Table --- */
.pace-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
}

.pace-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.pace-table th {
  background: var(--green);
  color: white;
  font-family: var(--font-head);
  font-weight: 600;
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.85rem;
}

.pace-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.pace-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }

.pace-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

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

.pace-table tr:nth-child(even) td { background: var(--green-pale); }

.pace-table .highlight td {
  background: var(--green-mid);
  font-weight: 600;
}

/* --- Stat Cards / Why Walk --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

.card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --- Popular Distances Grid --- */
.distances-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.distance-link {
  display: block;
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.distance-link:hover {
  border-color: var(--green);
  background: var(--green-pale);
  color: var(--green);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.distance-link .dist-num {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--green);
  line-height: 1;
  margin-bottom: 0.3rem;
}

/* --- Equivalents Section --- */
.equiv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.equiv-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.equiv-icon { font-size: 1.5rem; flex-shrink: 0; }

.equiv-text-val {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.equiv-text-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --- Calories Table --- */
.calorie-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 1.25rem 0;
}

.calorie-table th {
  background: var(--amber-light);
  color: var(--text);
  font-weight: 600;
  padding: 0.65rem 0.85rem;
  text-align: left;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calorie-table td {
  padding: 0.65rem 0.85rem;
  border-bottom: 1px solid var(--border);
}

.calorie-table tr:last-child td { border-bottom: none; }
.calorie-table tr:nth-child(even) td { background: #FDFAF6; }

/* --- FAQ --- */
.faq-list { margin-top: 1.5rem; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  background: var(--white);
}

.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 1.1rem 1.25rem;
  text-align: left;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-q:hover { color: var(--green); }

.faq-chevron {
  flex-shrink: 0;
  transition: transform 0.25s;
  color: var(--green);
}

.faq-item.open .faq-chevron { transform: rotate(180deg); }

.faq-a {
  display: none;
  padding: 0 1.25rem 1.1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-a { display: block; }

/* --- Internal Links Bar --- */
.internal-links {
  background: var(--green-pale);
  border: 1px solid var(--green-mid);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}

.internal-links p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.internal-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.internal-link-chip {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--green);
  text-decoration: none;
  transition: all 0.15s;
}

.internal-link-chip:hover {
  background: var(--green);
  color: white;
  text-decoration: none;
  border-color: var(--green);
}

/* --- Breadcrumb --- */
.breadcrumb {
  font-size: 0.82rem;
  color: var(--text-light);
  padding: 0.75rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--green); }
.breadcrumb .sep { color: var(--text-light); }

/* --- Instant Answer Block --- */
.instant-answer {
  background: var(--green);
  color: white;
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  margin-bottom: 2rem;
}

.instant-answer .ia-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0.5rem;
}

.instant-answer .ia-answer {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.3;
}

.instant-answer .ia-sub {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
}

/* --- Section Titles --- */
.section-title {
  margin-bottom: 0.5rem;
}

.section-sub {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 0;
}

/* --- Ad Placeholders --- */
.ad-slot {
  background: #f0f4f2;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: var(--text-light);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin: 2.5rem 0;
}

/* --- Encouragement Block --- */
.encouragement {
  background: linear-gradient(135deg, var(--green-dark), var(--green));
  color: white;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  margin: 2rem 0;
}

.encouragement h2 { color: white; margin-bottom: 0.75rem; }
.encouragement p { color: rgba(255,255,255,0.85); max-width: 500px; margin: 0 auto; }

/* --- Footer --- */
.site-footer {
  background: var(--text);
  color: rgba(255,255,255,0.6);
  padding: 3rem 1.25rem;
  margin-top: auto;
  font-size: 0.875rem;
}

.footer-inner {
  max-width: var(--max-w-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}

.footer-brand {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.1rem;
  color: white;
  margin-bottom: 0.5rem;
}

.footer-tagline { margin-bottom: 1rem; }

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
}

.footer-nav a {
  color: rgba(255,255,255,0.5);
  text-decoration: none;
}

.footer-nav a:hover {
  color: white;
  text-decoration: none;
}

.footer-copy {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
}

/* --- Utility Classes --- */
.text-green { color: var(--green); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 640px) {
  .calc-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .optional-fields { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero { padding: 2.5rem 1.25rem 4rem; }
  .calc-card { padding: 1.25rem; }
  .section { padding: 2.5rem 0; }
}


@media (max-width: 400px) {
  .result-grid { grid-template-columns: 1fr 1fr 1fr; }
  .result-item-val { font-size: 1.05rem; }
}

/* ── Footer columns (added for PHP footer) ───────────────────────────────── */
.footer-cols {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-col-head {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 0.75rem;
}
@media (max-width: 768px) {
  .footer-cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-cols { grid-template-columns: 1fr; }
}

/* ── Nav dropdown ────────────────────────────────────────────────────────── */
.nav-dropdown { position: relative; }

/* Invisible bridge fills the gap between trigger and menu */
.nav-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 0.75rem;
  background: transparent;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  min-width: 190px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  list-style: none;
  padding: 0.5rem 0;
  z-index: 200;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
  pointer-events: none;
}

.nav-dropdown-menu.is-open {
  display: block;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-dropdown-menu li a {
  display: block;
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.12s, color 0.12s;
}
.nav-dropdown-menu li a:hover { background: var(--bg); color: var(--green); }

/* ── Mobile hamburger ─────────────────────────────────────────────────────── */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  color: var(--text);
}
.nav-hamburger svg { display: block; }

@media (max-width: 768px) {
  .nav-hamburger { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
    z-index: 300;
  }
  .nav-links.is-open { display: flex; }

  .nav-links > li > a {
    display: block;
    padding: 0.75rem 1.25rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-dropdown::after { display: none; }
  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    border-radius: 0;
    background: var(--bg);
    padding: 0;
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
  .nav-dropdown-menu.is-open { display: block; }
  .nav-dropdown-menu li a {
    padding: 0.65rem 2rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.95rem;
  }
}