:root {
  --igas-primary: #1f3a8a;
  --igas-primary-dark: #15265e;
  --igas-accent: #f59e0b;
  --igas-bg: #f7f8fb;
  --igas-card-shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(15, 23, 42, .08);
}

html { font-size: 15px; position: relative; min-height: 100%; }
@media (min-width: 768px) { html { font-size: 16px; } }

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--igas-bg);
  color: #1f2937;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
  flex: 1 0 auto;
}

.navbar.igas-nav {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: 0 1px 0 rgba(0,0,0,.02);
}
.navbar.igas-nav .navbar-brand {
  font-weight: 700;
  color: var(--igas-primary);
  letter-spacing: .2px;
}

.btn-primary {
  background-color: var(--igas-primary);
  border-color: var(--igas-primary);
}
.btn-primary:hover, .btn-primary:focus {
  background-color: var(--igas-primary-dark);
  border-color: var(--igas-primary-dark);
}
.btn-outline-primary {
  color: var(--igas-primary);
  border-color: var(--igas-primary);
}
.btn-outline-primary:hover {
  background-color: var(--igas-primary);
  border-color: var(--igas-primary);
}

.igas-hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
}
.igas-hero h1 {
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--igas-primary);
  letter-spacing: -.5px;
}
.igas-hero p.lead {
  color: #4b5563;
  max-width: 36rem;
  margin: 0.75rem auto 1.5rem;
}

.igas-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--igas-card-shadow);
  padding: 2rem;
  border: 1px solid #eef0f4;
}
.igas-card h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--igas-primary);
}
.igas-card p.muted {
  color: #6b7280;
  font-size: 0.92rem;
  margin-bottom: 1.25rem;
}

.igas-form .form-label { font-weight: 500; color: #374151; }
.igas-form .form-control { padding: 0.65rem 0.85rem; }
.igas-form .form-text { color: #6b7280; }

.btn-google {
  background: #fff;
  color: #1f2937;
  border: 1px solid #d1d5db;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}
.btn-google:hover { background: #f3f4f6; border-color: #9ca3af; }
.btn-google svg { width: 18px; height: 18px; }

.otp-input {
  letter-spacing: 0.5em;
  text-align: center;
  font-size: 1.4rem;
  font-weight: 600;
}

.igas-status-pill {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.igas-status-pill.signed-up { background: #fef3c7; color: #92400e; }
.igas-status-pill.verified  { background: #dbeafe; color: #1e3a8a; }
.igas-status-pill.registrant{ background: #d1fae5; color: #065f46; }

.igas-success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 14px;
  padding: 2.5rem 2rem;
  text-align: center;
}
.igas-success h1 {
  color: #065f46;
  font-weight: 700;
}
.igas-success p { color: #065f46; }

footer.igas-footer {
  background: transparent;
  color: #9ca3af;
  flex-shrink: 0;
  margin-top: auto;
}