:root {
  --bg-main: #f3fbf8;
  --bg-soft: #e4f8f0;
  --bg-letter: #ffffff;
  --text-primary: #243331;
  --text-muted: rgba(36, 51, 49, 0.72);
  --accent: #2ec4a6;
  --accent-dark: #1ea689;
  --accent-light: rgba(46, 196, 166, 0.18);
  --shadow-soft: 0 20px 46px rgba(46, 196, 166, 0.16);
  --shadow-card: 0 14px 32px rgba(30, 166, 137, 0.16);
  --font-serif: 'Shippori Mincho', serif;
  --font-sans: 'Zen Maru Gothic', 'Hiragino Sans', '游ゴシック体', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(46, 196, 166, 0.4);
  outline-offset: 4px;
  border-radius: 6px;
}

.hero {
  position: relative;
  min-height: 75vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 120px 16px 84px;
  background: linear-gradient(160deg, #c1f7ea 0%, #f3fbf8 45%, #bcf1e5 100%);
  overflow: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
}

.hero__overlay::before,
.hero__overlay::after {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 50%;
  filter: blur(44px);
  animation: float 18s ease-in-out infinite;
}

.hero__overlay::before {
  top: -80px;
  left: 12%;
}

.hero__overlay::after {
  bottom: -130px;
  right: 8%;
  animation-delay: 5s;
}

.hero__content {
  position: relative;
  max-width: 630px;
  padding: 44px 40px;
  border-radius: 40px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(14px);
}

.hero__eyebrow {
  margin: 0 0 12px;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.hero__title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 6vw, 3.8rem);
  letter-spacing: 0.05em;
}

.hero__lead {
  margin: 0 0 34px;
  font-size: 1.05rem;
  color: var(--text-muted);
}

.hero__cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  border-radius: 999px;
  border: none;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  cursor: pointer;
}

.button:hover {
  transform: translateY(-2px);
  background: var(--accent-dark);
  box-shadow: var(--shadow-card);
}

.button:active {
  transform: translateY(1px);
}

.button--outline {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.button--outline:hover {
  background: var(--accent-light);
}

.section {
  padding: 96px 16px;
}

.section--soft {
  background: var(--bg-soft);
}

.section--letter {
  background: linear-gradient(180deg, #dff7ed 0%, #ffffff 45%);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section--letter.is-visible {
  opacity: 1;
  transform: none;
}

.section__inner {
  max-width: 960px;
  margin: 0 auto;
}

.section__inner--narrow {
  max-width: 620px;
}

.section__inner--letter {
  max-width: 720px;
  background: var(--bg-letter);
  padding: 56px 48px;
  border-radius: 32px;
  box-shadow: var(--shadow-card);
}

.section__title {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 4vw, 2.6rem);
  text-align: center;
}

.section__lead {
  margin: 0 auto 48px;
  max-width: 640px;
  text-align: center;
  color: var(--text-muted);
}

.ritual-form {
  display: grid;
  gap: 20px;
  padding: 36px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(46, 196, 166, 0.18);
  box-shadow: var(--shadow-card);
}

.ritual-form__label {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.ritual-form__field {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.ritual-form__input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(30, 166, 137, 0.22);
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.95);
}

.ritual-form__input::placeholder {
  color: rgba(36, 51, 49, 0.42);
}

.ritual-form__feedback {
  margin: 0;
  min-height: 1.2em;
  font-size: 0.95rem;
  color: var(--accent);
}

.ritual-form__aside {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(36, 51, 49, 0.55);
}

.section--letter[hidden] {
  display: none;
}

.letter__intro {
  margin: 0 0 24px;
  text-align: center;
  color: var(--text-muted);
}

.letter__body {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: #243331;
  display: grid;
  gap: 18px;
}

.letter__closing {
  text-align: right;
  font-weight: 600;
}

.letter__actions {
  margin-top: 32px;
  text-align: center;
}

.footer {
  padding: 40px 16px;
  text-align: center;
  color: var(--text-muted);
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-18px) scale(1.03);
  }
}

@media (max-width: 599px) {
  .hero {
    padding: 100px 16px 70px;
  }

  .hero__content {
    padding: 34px 26px;
  }

  .section__inner--letter {
    padding: 42px 28px;
  }

  .ritual-form {
    padding: 28px;
  }
}

/* Countdown Styles */
.countdown-overlay {
  position: fixed;
  inset: 0;
  background: rgba(243, 251, 248, 0.95);
  backdrop-filter: blur(10px);
  z-index: 100;
  display: grid;
  place-items: center;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s, visibility 0.5s;
}

.countdown-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

.countdown-content h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin-bottom: 32px;
}

.timer {
  display: flex;
  gap: 24px;
  justify-content: center;
}

.timer__unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 16px;
  box-shadow: var(--shadow-soft);
  min-width: 100px;
}

.timer__unit span {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
}

.timer__unit small {
  font-size: 1rem;
  color: var(--text-muted);
}