:root {
  --bm-blue: #36a9e1;
  --bm-dark: #3c3b2d;
  --xmas-red: #b3272d;
  --xmas-green: #1b4332;
  --xmas-gold: #d4af37;
  --white: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Dosis", sans-serif;
  font-size: 1.1rem;
  color: var(--bm-dark);
  background: linear-gradient(180deg, #eaf6fc 0%, #ffffff 45%);
  text-align: center;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

a { color: var(--bm-blue); }
a:hover { color: var(--bm-dark); }

h1, h2, h3 {
  font-weight: 300;
  color: var(--bm-blue);
}

/* Header */
.site-header {
  background-color: var(--bm-blue);
  padding: 20px 24px;
  box-shadow: 0 2px 12px 0 rgba(0,0,0,.1);
  position: relative;
  z-index: 2;
}

.site-header__logo {
  color: var(--white);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

/* Hero */
.hero {
  padding: 56px 24px 32px;
  position: relative;
  z-index: 1;
}

.hero__eyebrow {
  color: var(--xmas-red);
  font-weight: 700;
  letter-spacing: 1px;
  margin: 0 0 8px;
}

.hero h1 {
  font-size: 3rem;
  margin: 0 0 8px;
}

.hero__date {
  color: var(--xmas-red);
  font-size: 1.4rem;
  font-weight: 500;
  margin: 0 0 20px;
}

.hero__intro {
  max-width: 600px;
  margin: 0 auto 24px;
  line-height: 1.7rem;
  color: var(--bm-dark);
}

.hero__cta {
  display: inline-block;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--bm-blue);
  padding-bottom: 2px;
}

/* Details strip */
.details {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  padding: 16px 24px 48px;
  max-width: 900px;
  margin: 0 auto;
}

.details__item {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 12px 0 rgba(0,0,0,.05), 0 8px 24px 0 rgba(0,0,0,.08);
  padding: 24px 20px;
  width: 220px;
}

.details__icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 8px;
}

.details__item h3 {
  margin: 0 0 6px;
  color: var(--xmas-green);
  font-size: 1.2rem;
}

.details__item p {
  margin: 0;
  font-size: 0.95rem;
}

/* Mystery programme teaser */
.mystery {
  position: relative;
  max-width: 640px;
  margin: 0 auto 56px;
  padding: 36px 28px;
  background: radial-gradient(ellipse at top, #16321f 0%, var(--xmas-dark-green, #10281c) 100%);
  border-radius: 12px;
  box-shadow: 0 8px 24px 0 rgba(0,0,0,.2);
  color: var(--white);
  border: 1px dashed var(--xmas-gold);
}

.mystery__icon {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 8px;
}

.mystery h2 {
  color: var(--xmas-gold);
  margin: 0 0 12px;
}

.mystery__text {
  margin: 0 auto;
  max-width: 480px;
  line-height: 1.7rem;
  color: #f1ece0;
}

/* RSVP section */
.rsvp {
  background-color: var(--xmas-green);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(255,255,255,0.06) 0, transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(255,255,255,0.06) 0, transparent 40%);
  padding: 56px 24px;
  flex: 1;
}

.card {
  background: var(--white);
  border-radius: 12px;
  padding: 32px 28px;
  max-width: 520px;
  width: 100%;
  margin: 0 auto;
  box-shadow: 0 8px 24px 0 rgba(0,0,0,.25);
  border-top: 6px solid var(--xmas-red);
  text-align: left;
}

.card h2 {
  text-align: center;
  color: var(--xmas-green);
  margin: 0 0 4px;
}

.card__subtitle {
  text-align: center;
  color: var(--xmas-red);
  font-weight: 500;
  margin: 0 0 24px;
}

.field {
  margin-bottom: 18px;
  border: none;
  padding: 0;
}

fieldset.field {
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 12px 14px;
}

legend {
  font-weight: 700;
  color: var(--bm-blue);
  padding: 0 4px;
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--bm-blue);
}

label.radio {
  font-weight: 400;
  color: var(--bm-dark);
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
}

label.radio input { width: auto; }

input[type="text"], input[type="email"], textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
}

input:focus, textarea:focus {
  outline: 2px solid var(--xmas-gold);
  border-color: var(--xmas-gold);
}

.conditional {
  display: none;
}

.conditional.visible {
  display: block;
}

button {
  width: 100%;
  padding: 14px;
  background: var(--xmas-red);
  color: var(--white);
  border: none;
  border-radius: 48px;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover { background: #8f1f24; }
button:disabled { opacity: 0.6; cursor: not-allowed; }

#form-status {
  text-align: center;
  font-weight: 700;
  min-height: 1.4em;
}

#form-status.error { color: var(--xmas-red); }
#form-status.success { color: var(--xmas-green); }

/* Footer */
.site-footer {
  background-color: var(--bm-dark);
  color: var(--white);
  padding: 20px;
  font-weight: 500;
}

/* Decorations */
.snow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(2px 2px at 20% 20%, white, transparent),
    radial-gradient(2px 2px at 60% 40%, white, transparent),
    radial-gradient(1.5px 1.5px at 80% 10%, white, transparent),
    radial-gradient(2px 2px at 40% 70%, white, transparent),
    radial-gradient(1.5px 1.5px at 90% 80%, white, transparent),
    radial-gradient(1.5px 1.5px at 10% 90%, white, transparent);
  background-size: 220px 220px;
  opacity: 0.6;
  animation: fall 14s linear infinite;
  z-index: 0;
}

@keyframes fall {
  from { background-position: 0 0; }
  to { background-position: 0 220px; }
}

.lights {
  position: absolute;
  top: 68px;
  left: 0;
  right: 0;
  height: 24px;
  z-index: 2;
  pointer-events: none;
  background-image: radial-gradient(circle, var(--xmas-red) 0 4px, transparent 5px),
    radial-gradient(circle, var(--xmas-gold) 0 4px, transparent 5px),
    radial-gradient(circle, var(--xmas-green) 0 4px, transparent 5px);
  background-repeat: repeat-x;
  background-size: 90px 24px;
  background-position: 0 0, 30px 6px, 60px 0;
  animation: twinkle 2.4s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.5; }
  to { opacity: 1; }
}

@media (max-width: 600px) {
  .hero h1 { font-size: 2.2rem; }
  .details__item { width: 100%; max-width: 320px; }
}