:root {
  --outer: #ececea;
  --paper: #ffffff;
  --ink: #18202a;
  --navy: #071522;
  --navy-soft: #102f4a;
  --red: #e33f3a;
  --orange: #f06400;
  --line: #e7e7e3;
  --soft: #f7f6f3;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--outer);
  color: var(--ink);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    Meiryo,
    sans-serif;
  line-height: 1.75;
  letter-spacing: 0.015em;
}

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

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

.page {
  width: min(1160px, calc(100% - 36px));
  margin: 22px auto 40px;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid #dfdfdc;
}

/* --------------------------------
   Header
-------------------------------- */

.header {
  min-height: 78px;
  padding: 0 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--navy);
}

.header-logo {
  width: 228px;
  height: auto;
}

.special {
  color: #f4f6f7;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

/* --------------------------------
   Hero
-------------------------------- */

.hero {
  min-height: 360px;
  display: grid;
  grid-template-columns: 49% 51%;
  overflow: hidden;
  background: #f5f4f1;
}

.hero-copy {
  padding: 38px 36px 34px 46px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: #f5f4f1;
}

.hero-event-logo {
  width: min(360px, 92%);
  height: auto;
  margin-bottom: 22px;
}

.hero h1 {
  margin: 0;
  color: #232a32;
  font-size: clamp(30px, 3.2vw, 42px);
  font-weight: 900;
  line-height: 1.38;
  letter-spacing: 0.002em;
}

.hero h1 em {
  color: var(--red);
  font-style: normal;
}

.hero-art {
  position: relative;
  min-height: 360px;
  overflow: hidden;
  background: #ecebea;
}

.hero-art::before {
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(
      90deg,
      #f5f4f1 0%,
      rgba(245, 244, 241, 0.88) 8%,
      rgba(245, 244, 241, 0.34) 19%,
      rgba(245, 244, 241, 0) 32%
    );
}

.hero-art img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}

/* --------------------------------
   Common section
-------------------------------- */

.section {
  padding: 52px 54px;
  border-top: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 20px;
  color: var(--navy-soft);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 900;
  line-height: 1.5;
}

.section p {
  margin: 0 0 12px;
  color: #454d58;
  font-size: 16px;
}

/* --------------------------------
   Support message
-------------------------------- */

.support {
  display: grid;
  grid-template-columns: 58% 42%;
  gap: 38px;
  align-items: center;
}

.support .eyebrow {
  margin-bottom: 12px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
}

.support-visual {
  height: 400px;
  overflow: hidden;
  background: #f6f5f2;
}

.support-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 44%;
}

/* --------------------------------
   Event information
-------------------------------- */

.event {
  background: var(--soft);
}

.event-grid {
  display: grid;
  grid-template-columns: 42% 58%;
  gap: 42px;
  align-items: center;
}

.event h2 {
  color: var(--red);
  font-size: clamp(28px, 2.8vw, 36px);
  line-height: 1.4;
}

.event-name {
  margin-bottom: 14px;
  color: var(--navy-soft);
  font-size: 22px;
  font-weight: 900;
  line-height: 1.45;
}

.event p {
  color: #535c67;
}

.event-detail {
  margin-top: 20px;
}

.poster-note {
  margin: 0 0 14px;
  color: #656c75;
  font-size: 14px;
}

.btn {
  min-width: 220px;
  padding: 12px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  background: var(--red);
  font-size: 15px;
  font-weight: 800;
  transition: 0.2s;
}

.btn:hover {
  filter: brightness(0.95);
}

.poster-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.poster {
  width: auto;
  max-width: 100%;
  max-height: 500px;
  background: #ffffff;
  border: 1px solid #ddd8d0;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

/* --------------------------------
   Closing message
-------------------------------- */

.closing {
  padding: 48px 36px 42px;
  text-align: center;
  background: #ffffff;
  border-top: 1px solid var(--line);
}

.support-line {
  max-width: 780px;
  margin: 0 auto 24px;
  color: var(--navy-soft);
  font-size: clamp(21px, 2.2vw, 28px);
  font-weight: 900;
  line-height: 1.55;
}

.support-line span {
  color: var(--red);
}

/* --------------------------------
   Footer
-------------------------------- */

.footer {
  min-height: 100px;
  padding: 20px 34px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  background: var(--navy);
}

.footer-brand {
  width: 250px;
  max-width: 70vw;
  height: auto;
}

.footer-copy {
  color: #c5ccd1;
  font-size: 10px;
  letter-spacing: 0.1em;
}

/* --------------------------------
   Responsive
-------------------------------- */

@media (max-width: 820px) {
  .page {
    width: 100%;
    margin: 0;
    border: 0;
  }

  .header {
    min-height: 66px;
    padding: 0 20px;
  }

  .header-logo {
    width: 190px;
  }

  .special {
    font-size: 9px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    padding: 28px 22px 26px;
  }

  .hero-event-logo {
    width: min(300px, 88vw);
    margin-bottom: 18px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-art {
    min-height: 220px;
  }

  .hero-art img {
    object-position: 60% center;
  }

  .hero-art::before {
    background:
      linear-gradient(
        180deg,
        #f5f4f1 0%,
        rgba(245, 244, 241, 0.1) 12%,
        rgba(245, 244, 241, 0) 28%
      );
  }

  .section {
    padding: 40px 24px;
  }

  .support,
  .event-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .support h2 {
    font-size: 27px;
  }

  .support p,
  .event p {
    font-size: 15px;
  }

  .support-visual {
    height: 360px;
  }

  .event h2 {
    font-size: 29px;
  }

  .event-name {
    font-size: 20px;
  }

  .poster {
    max-height: 470px;
  }

  .poster-wrap {
    order: 2;
  }

  .event-copy {
    order: 1;
  }

  .closing {
    padding: 40px 22px 34px;
  }

  .support-line {
    font-size: 22px;
  }
}

@media (max-width: 480px) {
  .header {
    padding: 0 16px;
  }

  .header-logo {
    width: 165px;
  }

  .special {
    font-size: 8px;
    letter-spacing: 0.12em;
  }

  .hero-copy {
    padding: 24px 18px;
  }

  .hero-event-logo {
    width: min(280px, 86vw);
    margin-bottom: 16px;
  }

  .hero h1 {
    font-size: 27px;
    line-height: 1.42;
  }

  .hero-art {
    min-height: 190px;
  }

  .section {
    padding: 34px 18px;
  }

  .support h2 {
    font-size: 25px;
  }

  .support-visual {
    height: 320px;
  }

  .event h2 {
    font-size: 27px;
  }

  .poster {
    max-height: 440px;
  }

  .btn {
    width: 100%;
    min-width: 0;
  }
}


/* --------------------------------
   Event information - final layout
-------------------------------- */

.event-top {
  display: grid;
  grid-template-columns: 42% 58%;
  gap: 42px;
  align-items: center;
}

.event-label {
  margin-bottom: 14px;
  color: #7a8188;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.event-date {
  margin-bottom: 6px;
  color: var(--navy);
  font-size: clamp(24px, 2.4vw, 31px);
  font-weight: 900;
  line-height: 1.45;
}

.event-place {
  color: #4a535c;
  font-size: 17px;
  font-weight: 700;
}

.event-body {
  margin-top: 36px;
  padding-top: 30px;
  border-top: 1px solid #dddcd8;
}

.event-note {
  margin-top: 18px !important;
  color: var(--navy) !important;
  font-weight: 700;
}

.closing h2 {
  margin: 0 0 20px;
  color: var(--navy);
  font-size: clamp(27px, 2.8vw, 36px);
  font-weight: 900;
  line-height: 1.5;
}

.closing-copy {
  max-width: 760px;
  margin: 0 auto 26px;
  color: #515a63;
  font-size: 16px;
  line-height: 1.95;
}

@media (max-width: 820px) {
  .event-top {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .event-body {
    margin-top: 28px;
    padding-top: 24px;
  }

  .event-date {
    font-size: 26px;
  }

  .event-place {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .event-date {
    font-size: 23px;
  }
}