:root {
  --color-text: #0d1f8b;
  --color-accent: #4f73fb;
  --color-focus: #1e73be;
  --color-bg: #ffffff;
  --color-error: #b00020;
  --max-content: 600px;
  --font-display: 'Libre Caslon Display', 'Libre Caslon Text', Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--color-text);
  text-decoration: none;
}

.page {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.splash {
  width: 100%;
  max-width: 600px;
}
.splash img {
  width: 100%;
  height: auto;
  display: block;
}

.intro {
  text-align: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text);
  max-width: 32rem;
  line-height: 1.45;
}
.intro p { margin: 0 0 0.4rem; font-weight: 700; }
.intro p:last-child { margin-bottom: 0; }
.intro em { font-style: italic; }

.lang-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 360px;
}

.btn {
  display: inline-block;
  width: 100%;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.95rem 1.4rem;
  background: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
  border-radius: 0;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: opacity 0.15s ease;
}
.btn:hover { opacity: 0.85; color: #fff; }
.btn:disabled { opacity: 0.6; cursor: progress; }

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-text);
}
.btn-outline:hover { color: var(--color-text); }

.rsvp-form {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  font-family: var(--font-display);
  color: var(--color-text);
}

.rsvp-form .field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.rsvp-form .helper {
  font-style: italic;
  font-size: 1.05rem;
  color: var(--color-text);
  text-align: center;
  margin: 0.4rem 0 0;
  line-height: 1.4;
}

.rsvp-form textarea {
  width: 100%;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-style: italic;
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-text);
  border-radius: 0;
  padding: 0.4rem 0.1rem;
  resize: vertical;
  min-height: 2.2rem;
  outline: none;
}
.rsvp-form textarea:focus {
  border-bottom-color: var(--color-focus);
  color: var(--color-focus);
}

.rsvp-form textarea::placeholder {
  color: var(--color-text);
  opacity: 0.85;
  font-style: italic;
}
.rsvp-form textarea:focus::placeholder {
  color: var(--color-focus);
  opacity: 0.6;
}

.rsvp-form .radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.4rem 0;
}
.rsvp-form .radio-group label {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--color-text);
}
.rsvp-form .radio-group input[type="radio"] {
  margin-top: 0.35rem;
  accent-color: var(--color-accent);
  width: 1rem;
  height: 1rem;
}

.rsvp-form .submit-row {
  margin-top: 0.5rem;
}
.rsvp-form .submit-row .btn {
  width: 100%;
}

.field-error {
  color: var(--color-error);
  font-size: 0.95rem;
  font-style: italic;
  min-height: 1.1em;
}

.form-error {
  background: #ffecec;
  color: var(--color-error);
  padding: 0.7rem 1rem;
  border-radius: 0;
  font-size: 1rem;
  text-align: center;
}

.thank-you {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.2rem;
  color: #ffffff;
  text-align: center;
  background: var(--color-accent);
  padding: 1.4rem 1.4rem;
  max-width: 480px;
  line-height: 1.5;
}

.logo {
  width: 100%;
  max-width: 360px;
  margin-top: 1rem;
}

.hidden { display: none !important; }

.visually-hidden-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

fieldset.field {
  border: 0;
  margin: 0;
  padding: 0;
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

@media (max-width: 480px) {
  html, body { font-size: 17px; }
  .page { padding: 1.5rem 1rem 2.5rem; gap: 2rem; }
  .intro { font-size: 1.05rem; }
  .btn { font-size: 1.05rem; padding: 0.85rem 1.2rem; }
  .rsvp-form textarea { font-size: 1.05rem; }
  .rsvp-form .radio-group label { font-size: 1rem; }
}