:root {
  --formula: max(1px, 100vw / 1440);
  --clr-background: #e0eee8;
  --clr-neutral-1000: #000000;
  --clr-neutral-900: #1f1f1f;
  --clr-neutral-100: #ffffff;
  --clr-primary: #012169;
  --clr-link: #007cb0;
  --clr-accent: #86bc25;

  --font-primary: "Noto Sans JP", "Helvetica", Arial, "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ Pro W3", "メイリオ", "ＭＳ Ｐゴシック", "Osaka‐等幅", sans-serif;
}

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

body {
  display: flex;
  min-width: 0vw;
  min-height: 100vh;
  line-height: 1.5;
  color: var(--clr-neutral-900);
  font-family: var(--font-primary);
  background-color: var(--clr-background);
  flex-direction: column;
}

main {
  display: flex;
  flex: 1;
  flex-direction: column;
}

ul {
  list-style: none;
}

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

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

/* Layout */
.sec-wrap {
  --max-width: calc(1100 * var(--formula));
  --padding: calc(40 * var(--formula));

  width: min(var(--max-width), 100% - var(--padding));
  margin-inline: auto;
}

/* Header */
.header {
  display: flex;
  height: calc(48 * var(--formula));
  background-color: var(--clr-neutral-1000);
  align-items: center;
  padding-inline: calc(20 * var(--formula));
}

.logo {
  display: flex;
  width: calc(86 * var(--formula));
  color: var(--clr-neutral-100);
  align-items: center;
}

.logo img {
  width: 100%;
}

/* Footer */
.footer {
  display: flex;
  height: calc(48 * var(--formula));
  background-color: var(--clr-neutral-1000);
  align-items: center;
  justify-content: center;
  padding-inline: calc(20 * var(--formula));
}

.copyright {
  line-height: 2;
  color: var(--clr-neutral-100);
  font-size: calc(12 * var(--formula));
  font-weight: 500;
  text-align: center;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  width: 100%;
  max-width: calc(280 * var(--formula));
  line-height: 1.5;
  padding-top: calc(8 * var(--formula));
  padding-bottom: calc(13 * var(--formula));
  border: none;
  border-radius: calc(28 * var(--formula));
  color: var(--clr-neutral-100);
  font-size: calc(24 * var(--formula));
  font-weight: bold;
  align-items: center;
  justify-content: center;
  background-color: var(--clr-primary);
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.btn-primary:hover,
.btn-primary:focus {
  opacity: 0.8;
}

/* Intro Section */
.sec-intro {
  text-align: center;
  padding-block: calc(37 * var(--formula)) calc(40 * var(--formula));
}

.intro-title {
  line-height: 1.2;
  margin-bottom: calc(40 * var(--formula));
  font-size: calc(28 * var(--formula));
  font-weight: bold;
}

.intro-text {
  line-height: 1.75;
  font-size: calc(16 * var(--formula));
  font-weight: 500;
  text-align: center;
}

/* Schedule Section */
.sec-schedule {
  padding-bottom: calc(60 * var(--formula));
}

.schedule-grid {
  display: grid;
  margin-bottom: calc(40 * var(--formula));
  grid-template-columns: 1fr;
  gap: calc(20 * var(--formula));
}

.day-card {
  display: grid;
  overflow: hidden;
  border-radius: calc(10 * var(--formula));
  background-color: var(--clr-neutral-100);
  grid-template-rows: subgrid;
  grid-row: span 3;
  gap: 0;
}

.day-title {
  display: flex;
  height: calc(48 * var(--formula));
  background: linear-gradient(90deg, #86bc25, #26890d);
  color: var(--clr-neutral-100);
  font-size: calc(24 * var(--formula));
  font-weight: bold;
  align-items: center;
  padding-inline: calc(20 * var(--formula));
}

.schedule-upper,
.schedule-lower {
  margin-inline: calc(20 * var(--formula));
  padding-block: calc(19 * var(--formula));
}

.schedule-lower {
  border-top: 1px solid var(--clr-neutral-900);
}

.schedule-lower .schedule-access {
  font-size: calc(16 * var(--formula));
}

.schedule-lower .schedule-access a {
  line-height: 2;
  color: var(--clr-link);
  font-weight: 500;
  text-decoration: underline;
}

.schedule-heading {
  margin-bottom: calc(10 * var(--formula));
  color: var(--clr-primary);
  font-size: calc(16 * var(--formula));
  font-weight: 800;
}

.schedule-detail {
  line-height: 1.5;
  font-size: calc(18 * var(--formula));
  font-weight: bold;
}

.schedule-detail.lang-ja+.schedule-detail.lang-en {
  margin-top: 0;
}

.schedule-note {
  position: relative;
  line-height: 1.5;
  padding-left: calc(15 * var(--formula));
  font-size: calc(14 * var(--formula));
  font-weight: 500;
}

.schedule-note::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  content: "※";
}

.schedule-note.lang-en {
  margin-top: calc(4 * var(--formula));
}

.schedule-note.lang-ja+.schedule-note.lang-en {
  margin-top: calc(5 * var(--formula));
}

.schedule-note.lang-ja {
  margin-top: calc(5 * var(--formula));
}

/* Bilingual spacing helpers */
.lang-ja+.lang-en {
  margin-top: calc(8 * var(--formula));
}

.intro-text.lang-ja+.intro-text.lang-en {
  margin-top: calc(40 * var(--formula));
}

.intro-text.lang-en {
  max-width: 100%;
  margin-inline: auto;
}

/* Login Area */
.login-wrap {
  text-align: center;
}

.login-note {
  line-height: 1.5;
  font-size: calc(14 * var(--formula));
  font-weight: 500;
}

.login-note.lang-ja {
  margin-bottom: calc(9 * var(--formula));
}

.login-note.lang-en {
  margin-bottom: calc(20 * var(--formula));
}

/* Contact Section */
.sec-contact {
  text-align: center;
  background-color: var(--clr-neutral-100);
  padding-block: calc(35 * var(--formula)) calc(40 * var(--formula));
}

.contact-grid {
  display: flex;
  margin-bottom: calc(40 * var(--formula));
  flex-direction: column;
  align-items: center;
  gap: calc(15 * var(--formula));
}

.contact-block {
  width: 100%;
  max-width: calc(340 * var(--formula));
  text-align: center;
}

.contact-info {
  line-height: 1.7;
  font-size: calc(16 * var(--formula));
  font-weight: 500;
}

.contact-info .mail {
  color: var(--clr-link);
  text-decoration: underline;
}

.contact-notes-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-notes {
  line-height: 1.5;
  font-size: calc(14 * var(--formula));
}

.contact-notes.lang-ja+.contact-notes.lang-en {
  margin-top: 0;
}

@media screen and (min-width: 769px) {
  .header {
    padding-inline: calc(56 * var(--formula));
  }

  .copyright {
    font-size: calc(14 * var(--formula));
  }

  .sec-intro {
    padding-block: calc(45 * var(--formula)) calc(40 * var(--formula));
  }

  .intro-title {
    font-size: calc(42 * var(--formula));
  }

  .intro-text {
    line-height: 1.7;
  }

  .intro-text.lang-ja {
    margin-block: calc(40 * var(--formula));
  }

  .intro-text.lang-ja+.intro-text.lang-en {
    margin-top: calc(8 * var(--formula));
  }

  .intro-text.lang-en {
    max-width: calc(478 * var(--formula));
  }

  .schedule-grid {
    margin-bottom: calc(35 * var(--formula));
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
  }

  .schedule-note {
    line-height: 1.6;
  }

  .schedule-note.lang-ja {
    margin-top: calc(10 * var(--formula));
  }

  .schedule-note.lang-ja+.schedule-note.lang-en {
    margin-top: 0;
  }

  .login-note {
    line-height: 1.6;
  }

  .login-note.lang-ja {
    margin-bottom: calc(4 * var(--formula));
  }

  .sec-contact {
    margin-top: auto;
    padding-block: calc(40 * var(--formula));
  }

  .contact-grid {
    max-width: calc(915 * var(--formula));
    margin-bottom: calc(35 * var(--formula));
    flex-direction: row;
    justify-content: space-between;
    gap: calc(40 * var(--formula));
    align-items: flex-start;
    margin-inline: auto;
  }

  .contact-grid .contact-block.lang-en {
    margin-top: 0;
  }

  .contact-notes-wrap {
    gap: calc(6 * var(--formula));
  }

  .contact-notes {
    line-height: 1.7;
  }
}