:root {
  --navy: #0b1847;
  --navy-soft: #13245c;
  --cream: #fff6d8;
  --pink: #f07e9c;
  --aqua: #72c7eb;
  --sunset: #ffd25d;
  --line: rgba(255, 241, 201, 0.23);
  --muted: #c9d2e8;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--navy);
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 22%, rgba(84, 227, 210, 0.08), transparent 26rem),
    linear-gradient(145deg, var(--navy-soft) 0%, var(--navy) 58%, #091238 100%);
  color: var(--cream);
  font-family: var(--body);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--cream);
  color: var(--navy);
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-frame {
  width: min(100%, 1600px);
  min-height: 100vh;
  margin: 0 auto;
  border-inline: 1px solid rgba(255, 241, 201, 0.1);
}

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 50%;
  display: grid;
  width: min(100%, 1600px);
  grid-template-columns: auto 1fr auto;
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: 26px clamp(24px, 5vw, 76px);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 24, 71, 0.88);
  backdrop-filter: blur(14px);
  transform: translateX(-50%);
}

.header-logo {
  padding-block: 7px;
  font: 500 17px/1 var(--display);
  letter-spacing: 0.1em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.header-logo:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 6px;
}

.language-menu {
  position: relative;
  grid-column: 3;
  justify-self: end;
}

.language-menu::after {
  position: absolute;
  top: 50%;
  right: 12px;
  width: 5px;
  height: 5px;
  border-right: 1px solid var(--cream);
  border-bottom: 1px solid var(--cream);
  content: "";
  pointer-events: none;
  transform: translateY(-70%) rotate(45deg);
}

.language-menu select {
  min-width: 66px;
  padding: 9px 28px 9px 12px;
  border: 1px solid rgba(255, 241, 201, 0.34);
  border-radius: 0;
  appearance: none;
  background: rgba(11, 24, 71, 0.25);
  color: var(--cream);
  cursor: pointer;
  font: 500 11px/1 var(--display);
  letter-spacing: 0.16em;
}

.language-menu select:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 4px;
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: 100svh;
  overflow: hidden;
  align-items: center;
  padding: 140px clamp(24px, 6.5vw, 104px) 94px;
}

.hero::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  content: "";
  mask-image: linear-gradient(to bottom, #000, transparent 82%);
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(300px, 0.84fr);
  gap: clamp(56px, 8vw, 136px);
  align-items: center;
}

.hero-logo {
  margin: 0;
  font: 400 clamp(4.7rem, 8.8vw, 9.5rem)/0.84 var(--display);
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.hero-logo > span {
  display: block;
}

.hero-logo-accent {
  color: var(--aqua);
}

.hero-copy {
  max-width: 420px;
  padding-top: clamp(90px, 15vh, 170px);
}

.tagline {
  margin: 0;
  font: 400 clamp(2.2rem, 3.6vw, 4rem)/1.02 var(--display);
  letter-spacing: 0.01em;
}

.tagline em {
  display: inline-block;
  margin-top: 0.1em;
  padding: 0.02em 0.15em 0.08em;
  background: var(--pink);
  box-shadow: 8px 8px 0 var(--aqua);
  color: var(--navy);
  font-style: normal;
  transform: rotate(-1deg);
}

.tagline-ja {
  margin: 28px 0 0;
  font-size: clamp(0.9rem, 1.1vw, 1rem);
  font-weight: 500;
  letter-spacing: 0.07em;
}

.intro {
  grid-column: 1 / -1;
  margin: clamp(56px, 8vh, 88px) 0 0;
  width: fit-content;
  max-width: 100%;
  padding: 13px 18px 14px;
  background: var(--cream);
  box-shadow: 9px 9px 0 rgba(114, 199, 235, 0.68);
  color: var(--navy);
  font-size: clamp(0.78rem, 1vw, 0.9rem);
  letter-spacing: 0.025em;
  line-height: 2;
  white-space: nowrap;
}

.hero-art {
  position: absolute;
  z-index: -1;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.sun {
  position: absolute;
  top: 17%;
  right: 10%;
  width: clamp(72px, 8vw, 130px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 70px rgba(255, 95, 150, 0.2);
}

.orbit {
  position: absolute;
  top: 27%;
  left: 35%;
  width: 64vw;
  height: 22vw;
  border: 1px solid rgba(255, 241, 201, 0.35);
  border-radius: 50%;
  transform: rotate(-12deg);
}

.orbit-two {
  top: 19%;
  left: 37%;
  width: 52vw;
  height: 15vw;
  border-color: rgba(84, 227, 210, 0.38);
  transform: rotate(7deg);
}

.orbit-two::after {
  position: absolute;
  top: 18%;
  left: 12%;
  width: 12px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--sunset);
  box-shadow: 150px 30px 0 -3px var(--aqua), 320px -8px 0 -1px var(--pink);
  content: "";
}

.star-field {
  position: absolute;
  top: 22%;
  right: 6%;
  width: 145px;
  height: 90px;
  opacity: 0.5;
  background-image: radial-gradient(circle, var(--cream) 1.2px, transparent 1.5px);
  background-size: 17px 17px;
}

.skyline {
  position: absolute;
  right: 2%;
  bottom: 12%;
  display: flex;
  width: 37%;
  height: 26%;
  align-items: end;
  gap: 5px;
  opacity: 0.2;
}

.skyline i {
  position: relative;
  flex: 1;
  height: 35%;
  border: 0;
  background: var(--aqua);
}

.skyline i:nth-child(3n) { background: var(--pink); }
.skyline i:nth-child(4n) { background: var(--sunset); }

.skyline i:nth-child(2) { height: 56%; }
.skyline i:nth-child(3) { height: 43%; }
.skyline i:nth-child(4) { height: 88%; }
.skyline i:nth-child(5) { height: 65%; }
.skyline i:nth-child(6) { height: 100%; }
.skyline i:nth-child(7) { height: 54%; }
.skyline i:nth-child(8) { height: 72%; }
.skyline i:nth-child(9) { height: 46%; }

.section-block {
  padding: clamp(120px, 13vw, 208px) clamp(24px, 7vw, 112px);
}

.section-heading {
  align-self: start;
}

.section-heading h2 {
  margin: 0;
  font: 400 clamp(3rem, 5vw, 5.8rem)/0.98 var(--display);
  letter-spacing: -0.015em;
  text-transform: uppercase;
}

.section-heading > p:last-child {
  max-width: 520px;
  margin: 44px 0 0;
  font-size: 0.92rem;
  line-height: 2;
}

.about {
  display: grid;
  grid-template-columns: minmax(240px, 0.67fr) minmax(0, 1.33fr);
  gap: clamp(88px, 12vw, 190px);
  background-color: var(--cream);
  background-image:
    linear-gradient(rgba(58, 145, 186, 0.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 145, 186, 0.075) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--navy);
}

.theme-list {
  border-top: 1px solid rgba(11, 24, 71, 0.28);
}

.theme-card {
  position: relative;
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: clamp(18px, 3vw, 44px);
  overflow: hidden;
  align-items: start;
  padding: 48px 4px 54px;
  border-bottom: 1px solid rgba(11, 24, 71, 0.28);
}

.theme-number {
  display: grid;
  width: 44px;
  height: 28px;
  place-items: center;
  margin: 3px 0 0;
  background: var(--aqua);
  color: var(--navy);
  font: 500 15px/1 var(--display);
  letter-spacing: 0.1em;
}

.theme-experiment .theme-number { background: var(--pink); }
.theme-reflect .theme-number { background: var(--sunset); }

.theme-name {
  margin: 0 0 12px;
  color: #bf3169;
  font: 500 17px/1 var(--display);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.theme-copy h3 {
  margin: 0;
  font-size: clamp(1.3rem, 1.9vw, 1.72rem);
  font-weight: 500;
  line-height: 1.4;
}

.theme-copy > p:last-child {
  max-width: 600px;
  margin: 22px 0 0;
  color: #31406d;
  font-size: 0.91rem;
  line-height: 2;
}

.calendar-section {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 86% 18%, rgba(255, 95, 150, 0.14) 0 8%, transparent 8.2%),
    linear-gradient(155deg, #102158 0%, var(--navy) 58%, #071137 100%);
}

.calendar-section::before {
  position: absolute;
  top: 3%;
  right: -6%;
  width: 40%;
  aspect-ratio: 1;
  border: 1px solid rgba(84, 227, 210, 0.25);
  border-radius: 50%;
  content: "";
}

.calendar-heading {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  column-gap: clamp(48px, 8vw, 120px);
  align-items: end;
  margin-bottom: clamp(54px, 8vw, 96px);
}

.calendar-heading > p:last-child {
  max-width: none;
  margin: 0;
  white-space: nowrap;
}

.calendar-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  border: 1px solid var(--line);
  background: rgba(5, 15, 51, 0.56);
  box-shadow: 18px 18px 0 rgba(255, 95, 150, 0.13);
  backdrop-filter: blur(10px);
}

.calendar-panel {
  padding: clamp(22px, 4vw, 54px);
}

.calendar-toolbar {
  display: grid;
  grid-template-columns: 46px 1fr 46px;
  gap: 16px;
  align-items: center;
  margin-bottom: 34px;
}

.calendar-month {
  margin: 0;
  font: 400 clamp(2rem, 3.4vw, 3.2rem)/1 var(--display);
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
}

.calendar-nav-button {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid rgba(255, 241, 201, 0.45);
  border-radius: 50%;
  background: transparent;
  color: var(--cream);
  cursor: pointer;
  font-size: 1.15rem;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.calendar-nav-button:hover {
  background: var(--aqua);
  color: var(--navy);
  transform: translateY(-2px);
}

.calendar-nav-button:focus-visible,
.calendar-day:focus-visible {
  outline: 2px solid var(--pink);
  outline-offset: 3px;
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.calendar-weekdays {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}

.calendar-grid {
  border-left: 1px solid rgba(255, 241, 201, 0.12);
}

.calendar-day {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 82px;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 12px;
  border: 0;
  border-right: 1px solid rgba(255, 241, 201, 0.12);
  border-bottom: 1px solid rgba(255, 241, 201, 0.12);
  background: transparent;
  color: var(--cream);
  cursor: pointer;
  font: 400 0.9rem/1 var(--display);
}

.calendar-day:hover {
  background: rgba(84, 227, 210, 0.09);
}

.calendar-day.is-outside {
  color: rgba(201, 210, 232, 0.38);
}

.calendar-day-number {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  margin: -5px -5px 0 0;
  line-height: 1;
}

.calendar-day.is-today .calendar-day-number {
  border: 1px solid var(--aqua);
  border-radius: 50%;
}

.calendar-day.is-selected {
  background: var(--cream);
  color: var(--navy);
}

.calendar-day.has-events::after {
  position: absolute;
  bottom: 10px;
  left: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 12px 0 0 -2px var(--aqua);
  content: "";
}

.calendar-day.is-selected.has-events::after {
  box-shadow: 12px 0 0 -2px #267a87;
}

.calendar-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  text-align: right;
}

.event-panel {
  min-width: 0;
  padding: clamp(28px, 4vw, 54px);
  border-left: 1px solid var(--line);
  background: rgba(11, 24, 71, 0.82);
}

.event-panel-label {
  margin: 0 0 12px;
  color: var(--pink);
  font: 500 11px/1 var(--display);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.event-date {
  margin: 0 0 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  font: 400 clamp(2rem, 3.2vw, 3rem)/1 var(--display);
}

.event-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.89rem;
  line-height: 2;
}

.event-card + .event-card {
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.event-card h4 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
}

.event-time,
.event-location {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.7;
}

.event-link {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-top: 17px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--pink);
  color: var(--cream);
  font: 500 0.75rem/1 var(--display);
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
}

.event-link:hover {
  color: var(--aqua);
}

.event-link:focus-visible,
.site-footer a:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 5px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  place-items: center;
  padding: 58px clamp(24px, 6vw, 96px) 34px;
  border-top: 1px solid var(--line);
  background: #071137;
  text-align: center;
}

.footer-logo {
  margin: 0;
  font: 400 clamp(1.8rem, 2.7vw, 2.7rem)/1 var(--display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-logo + p {
  margin: 12px 0 0;
  color: var(--pink);
  font: 400 1rem/1 var(--display);
  letter-spacing: 0.08em;
}

.copyright {
  grid-column: 1 / -1;
  margin: 46px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 241, 201, 0.12);
  color: var(--muted);
  font: 400 0.7rem/1 var(--display);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

::selection {
  background: var(--pink);
  color: var(--navy);
}

@media (max-width: 900px) {
  .site-header {
    padding-inline: 24px;
  }

  .hero {
    align-items: start;
    padding: 132px 24px 96px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .hero-logo {
    font-size: clamp(4.4rem, 15vw, 7.8rem);
  }

  .hero-copy {
    max-width: 520px;
    padding-top: 0;
  }

  .tagline {
    font-size: clamp(2.55rem, 7.5vw, 4rem);
  }

  .intro {
    margin-top: 10px;
    white-space: normal;
  }

  .sun {
    top: 18%;
    right: -2%;
  }

  .orbit {
    top: 31%;
    left: 24%;
    width: 96vw;
    height: 34vw;
  }

  .star-field {
    top: 47%;
  }

  .skyline {
    width: 62%;
    height: 18%;
  }

  .section-block {
    padding-inline: 24px;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 72px;
  }

  .about .section-heading > p:last-child {
    max-width: 560px;
  }

  .calendar-heading {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .calendar-heading > p:last-child {
    white-space: normal;
  }

  .calendar-shell {
    grid-template-columns: 1fr;
    box-shadow: 10px 10px 0 rgba(255, 95, 150, 0.13);
  }

  .event-panel {
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 480px) {
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding: 18px 20px;
  }

  .header-logo {
    font-size: 15px;
  }

  .language-menu {
    grid-column: 2;
  }

  .hero {
    padding-top: 112px;
  }

  .hero-logo {
    font-size: clamp(3.6rem, 16.5vw, 4.85rem);
    line-height: 0.86;
  }

  .tagline-ja {
    letter-spacing: 0;
  }

  .intro {
    font-size: 0.875rem;
  }

  .section-heading h2 {
    font-size: clamp(2.8rem, 14vw, 4rem);
  }

  .theme-card {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 16px;
    padding-block: 30px;
  }

  .calendar-panel,
  .event-panel {
    padding: 24px 18px;
  }

  .calendar-toolbar {
    grid-template-columns: 38px 1fr 38px;
    gap: 10px;
  }

  .calendar-nav-button {
    width: 38px;
    height: 38px;
  }

  .calendar-day {
    min-height: 54px;
    padding: 9px 8px;
    font-size: 0.78rem;
  }

  .calendar-day-number {
    width: 26px;
    height: 26px;
    margin: -5px -4px 0 0;
  }

  .calendar-day.has-events::after {
    bottom: 7px;
    left: 7px;
    width: 6px;
    height: 6px;
    box-shadow: 9px 0 0 -2px var(--aqua);
  }

  .calendar-note {
    text-align: left;
  }

  .copyright {
    grid-column: auto;
    margin-top: 16px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .hero-identity,
  .hero-copy {
    animation: rise-in 700ms cubic-bezier(.2, .75, .25, 1) both;
  }

  .hero-copy {
    animation-delay: 120ms;
  }

  .sun {
    animation: sun-in 900ms cubic-bezier(.2, .75, .25, 1) both;
  }
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes sun-in {
  from { opacity: 0; transform: scale(0.72); }
  to { opacity: 1; transform: scale(1); }
}