:root {
  --page-bg: 224 219 206;
  --paper: 247 241 227;
  --flap-1: 236 221 190;
  --flap-2: 221 202 165;
  --ink: 42 34 28;
  --muted: 124 109 92;
  --wine: 107 39 55;
  --wine-deep: 78 25 39;
  --border: 214 197 165;

  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
  background: rgb(var(--page-bg));
  color: rgb(var(--ink));
  font-family: 'EB Garamond', serif;
}

.page {
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.page-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgb(var(--wine));
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.page-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 2.3rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.page-lede {
  font-size: 0.95rem;
  color: rgb(var(--muted));
  margin-bottom: 1.75rem;
}

/* ---------- Envelope ---------- */
.envelope {
  position: relative;
  background: rgb(var(--paper));
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 30px 60px -28px rgb(30 20 14 / 0.5);
}

.flap {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 108px;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  background: linear-gradient(160deg, rgb(var(--flap-1)), rgb(var(--flap-2)));
}

.seal {
  position: absolute;
  top: 108px;
  left: 50%;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 35% 30%, rgb(150 55 74), rgb(var(--wine)) 55%, rgb(var(--wine-deep)));
  box-shadow: 0 8px 16px -6px rgb(0 0 0 / 0.45);
}

.seal.is-stamped {
  animation: stamp-down 420ms var(--ease-out-expo) both;
}

@keyframes stamp-down {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.8) rotate(0deg);
  }
  65% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(0.94) rotate(-8deg);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1) rotate(-4deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .seal.is-stamped {
    animation: seal-fade 200ms ease both;
  }

  @keyframes seal-fade {
    from {
      opacity: 0;
    }
    to {
      opacity: 1;
      transform: translate(-50%, -50%) scale(1) rotate(-4deg);
    }
  }
}

.seal-mark {
  font-family: 'Cormorant Garamond', serif;
  font-style: italic;
  font-weight: 700;
  font-size: 1.6rem;
  color: rgb(232 216 180);
  text-shadow: 0 1px 1px rgb(0 0 0 / 0.35);
}

.letter {
  padding: 7.5rem 2rem 2.25rem;
}

.letter-title {
  font-family: 'Cormorant Garamond', serif;
  font-size: 1.7rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.letter-lede {
  font-size: 0.95rem;
  color: rgb(var(--muted));
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.letter-form {
  margin-bottom: 1.5rem;
}

.field {
  margin-bottom: 1rem;
}

.field input {
  width: 100%;
  padding: 0.5rem 0 0.6rem;
  font-family: 'EB Garamond', serif;
  font-size: 1.05rem;
  text-align: center;
  color: rgb(var(--ink));
  background: none;
  border: none;
  border-bottom: 1.5px solid rgb(var(--border));
  outline: none;
  transition: border-color 200ms ease;
}

.field input::placeholder {
  color: rgb(var(--muted) / 0.55);
}

.field input:focus {
  border-color: rgb(var(--wine));
}

.field input.is-invalid {
  border-color: rgb(var(--wine-deep));
  animation: shake 380ms var(--ease-out-quad);
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-6px);
  }
  40% {
    transform: translateX(5px);
  }
  60% {
    transform: translateX(-4px);
  }
  80% {
    transform: translateX(3px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .field input.is-invalid {
    animation: none;
  }
}

.field-error {
  min-height: 1.2em;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: rgb(var(--wine-deep));
  opacity: 0;
  transition: opacity 150ms ease;
}

.field-error.is-visible {
  opacity: 1;
}

.subscribe-btn {
  width: 100%;
  padding: 0.75rem;
  font-family: 'EB Garamond', serif;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgb(var(--paper));
  background: rgb(var(--wine));
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition:
    background-color 200ms ease,
    transform 150ms var(--ease-out-quad);
}

.subscribe-btn:hover:not(:disabled) {
  background: rgb(var(--wine-deep));
}

.subscribe-btn:active:not(:disabled) {
  transform: scale(0.98);
}

.subscribe-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: rgb(var(--muted));
}

.benefits[hidden] {
  display: none;
}

.benefits li::before {
  content: '\2713';
  color: rgb(var(--wine));
  margin-right: 0.4rem;
}

.success[hidden] {
  display: none;
}

.success {
  animation: rise-in 320ms var(--ease-out-expo) both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .success {
    animation: none;
  }
}

.success p {
  font-size: 0.92rem;
  margin-bottom: 0.9rem;
}

.reset-btn {
  font-family: 'EB Garamond', serif;
  font-size: 0.82rem;
  color: rgb(var(--wine));
  background: none;
  border: none;
  border-bottom: 1px solid rgb(var(--wine) / 0.4);
  cursor: pointer;
  padding: 0;
}

.reset-btn:hover {
  border-bottom-color: rgb(var(--wine));
}