:root {
  --border: #e5e7eb;
  --border-soft: #f3f4f6;
  --muted: #6b7280;
  --text: #0b1020;
  --primary: #1d4ed8;
  --primary-soft: #eff6ff;
  --primary-hover: #1e40af;
}

.app-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.hero-chip {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  background: var(--primary-soft); color: var(--primary);
  border-radius: 9999px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
}

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

.app-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: 0 12px 40px rgba(11, 16, 32, 0.08);
  overflow: hidden;
}
.card-accent { position: relative; }
.card-accent::after {
  content: "";
  position: absolute; inset: auto 0 0 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), #5b7cf0);
}

/* Form primitives ------------------------------------------------------- */

.form-label { display: block; font-size: 0.75rem; font-weight: 600; margin-bottom: 0.25rem; }
.form-label .required { color: var(--primary); margin-left: 0.125rem; }

.form-input {
  display: block; width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem; color: var(--text);
  background: #fff; font-family: inherit;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.18);
}

/* Submit button --------------------------------------------------------- */

.submit-btn {
  width: 100%;
  background: var(--primary); color: #fff;
  padding: 0.625rem;
  border-radius: 0.5rem;
  font-weight: 600; font-size: 0.9375rem; font-family: inherit;
  border: 0; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  transition: background 0.15s;
}
.submit-btn:hover { background: var(--primary-hover); }
.submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }