/* ── Variables ──────────────────────────────────────────── */
:root {
  --blue:   #1a3a5c;
  --sand:   #f5f0e8;
  --coral:  #e05c3a;
  --white:  #ffffff;
  --grey:   #6b7280;
  --light:  #f9f8f6;
  --border: #e5e0d8;

  --font-sans:  'DM Sans', system-ui, sans-serif;
  --font-serif: 'DM Serif Display', Georgia, serif;

  --max-w: 680px;
  --radius: 6px;
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--white);
  color: #1a1a1a;
  line-height: 1.6;
}
img { display: block; max-width: 100%; }
a { color: var(--blue); text-decoration: underline; }
a:hover { color: var(--coral); }

/* ── Layout ─────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Nav ────────────────────────────────────────────────── */
nav {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}
nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
nav .site-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--blue);
  text-decoration: none;
  letter-spacing: -0.01em;
}
nav .nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}
nav .nav-links a {
  font-size: 0.875rem;
  color: var(--grey);
  text-decoration: none;
  letter-spacing: 0.01em;
}
nav .nav-links a:hover { color: var(--blue); }
nav .nav-links a.active { color: var(--blue); font-weight: 600; }

/* ── Hero (index) ───────────────────────────────────────── */
.hero {
  padding: 80px 0 64px;
  text-align: center;
}
.hero .eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1.1;
  color: var(--blue);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero p {
  font-size: 1.1rem;
  color: var(--grey);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.15s, transform 0.15s;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--coral); color: var(--white); }
.btn-secondary {
  background: transparent;
  color: var(--blue);
  border: 1.5px solid var(--blue);
}

/* ── Divider ────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ── Stats bar (index) ──────────────────────────────────── */
.stats-bar {
  background: var(--sand);
  padding: 28px 0;
  text-align: center;
}
.stats-bar .stat-number {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  color: var(--blue);
  display: block;
}
.stats-bar .stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey);
  margin-top: 4px;
}

/* ── How it works (index) ───────────────────────────────── */
.how-it-works {
  padding: 64px 0;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--blue);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}
.steps {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.step-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--blue);
  color: var(--white);
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 4px;
}
.step-body p { font-size: 0.95rem; color: var(--grey); }

/* ── Form page ──────────────────────────────────────────── */
.page-header {
  padding: 56px 0 40px;
}
.page-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  color: var(--blue);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.page-header p { font-size: 1rem; color: var(--grey); }

.form-card {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 36px;
  margin-bottom: 48px;
}

.form-group {
  margin-bottom: 24px;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 7px;
  letter-spacing: 0.01em;
}
.form-group .hint {
  font-size: 0.8rem;
  color: var(--grey);
  margin-top: 5px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: #1a1a1a;
  background: var(--white);
  transition: border-color 0.15s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--blue);
}
.form-group textarea {
  resize: vertical;
  min-height: 90px;
}

/* ── Map pin drop ───────────────────────────────────────── */
.map-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 8px;
  display: block;
}
.map-hint {
  font-size: 0.8rem;
  color: var(--grey);
  margin-bottom: 10px;
}
#pin-map {
  width: 100%;
  height: 340px;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  z-index: 0;
}
.pin-coords {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--grey);
  min-height: 18px;
}
.pin-required-msg {
  font-size: 0.8rem;
  color: var(--coral);
  margin-top: 6px;
  display: none;
}

/* ── Submit success state ───────────────────────────────── */
#success-message {
  display: none;
  text-align: center;
  padding: 60px 0;
}
#success-message .checkmark {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
#success-message h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--blue);
  margin-bottom: 10px;
}
#success-message p { color: var(--grey); margin-bottom: 24px; }

/* ── Heat map page ──────────────────────────────────────── */
.heatmap-header {
  padding: 48px 0 24px;
}
.heatmap-header h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  color: var(--blue);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.heatmap-header p { font-size: 0.95rem; color: var(--grey); }

#heat-map {
  width: 100%;
  height: 520px;
  border-radius: 10px;
  border: 1px solid var(--border);
  margin-bottom: 24px;
}

.legend {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--grey);
  margin-bottom: 48px;
}
.legend-gradient {
  width: 120px;
  height: 10px;
  border-radius: 5px;
  background: linear-gradient(to right, #4575b4, #fee090, #d73027);
  flex-shrink: 0;
}

.loading-msg {
  text-align: center;
  padding: 80px 0;
  color: var(--grey);
  font-size: 0.95rem;
}

/* ── Footer ─────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--grey);
}
footer a { color: var(--grey); }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 600px) {
  .form-card { padding: 24px 20px; }
  nav .nav-links { gap: 16px; }
  #pin-map { height: 260px; }
  #heat-map { height: 380px; }
  .hero { padding: 56px 0 48px; }
}