/* =========================================================
   SikaFes'26 Stylesheet
   Breakpoint: 525px / Max-width: 1200px / Base: 16px
   ========================================================= */

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* DAY1: 朝〜昼の爽やかなブルー〜シアン系 */
  --day1-primary: #00b8d4;
  --day1-secondary: #4dd0e1;
  --day1-accent: #ffeb3b;
  --day1-deep: #006064;
  --day1-grad: linear-gradient(135deg, #00b8d4 0%, #4dd0e1 50%, #ffeb3b 100%);
  --day1-grad-soft: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%);

  /* DAY2: 夕方〜夜の高揚感あるマゼンタ〜オレンジ系 */
  --day2-primary: #ff4081;
  --day2-secondary: #ff6e40;
  --day2-accent: #ffd54f;
  --day2-deep: #4a148c;
  --day2-grad: linear-gradient(135deg, #4a148c 0%, #ff4081 50%, #ff6e40 100%);
  --day2-grad-soft: linear-gradient(135deg, #fce4ec 0%, #ffccbc 100%);

  /* Common */
  --bg-light: #fafafa;
  --bg-dark: #0a0a0f;
  --text-main: #1a1a1a;
  --text-sub: #555;
  --text-light: #fff;
  --max-width: 2400px;

  /* Typography */
  --font-display: 'Bebas Neue', 'Oswald', 'Impact', sans-serif;
  --font-jp: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-en: 'Montserrat', 'Helvetica Neue', sans-serif;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-jp);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-light);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  color: #fff;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1429962714451-bb934ecdc4ec?w=1600&q=80');
  background-size: cover;
  background-position: center;
  z-index: -2;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 15% 25%, rgb(0 66 114 / 77%) 0%, transparent 45%), radial-gradient(circle at 85% 75%, rgb(130 0 65 / 48%) 0%, transparent 45%), linear-gradient(135deg, rgba(10, 0, 60, 0.45) 0%, rgba(0, 0, 0, 0.25) 100%);
  z-index: -1;
}

.hero__inner {
  padding: 2rem 1rem;
  width: 100%;
  max-width: var(--max-width);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 18vw, 14rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  font-weight: 900;
  padding-top: 0.1em;
  background: linear-gradient(135deg, #00f5ff 0%, #ffeb3b 35%, #ff4081 70%, #ff6e40 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 30px rgba(255, 255, 255, 0.3));
  margin-bottom: 1rem;
  animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
  from { filter: drop-shadow(0 4px 30px rgba(0, 245, 255, 0.4)); }
  to { filter: drop-shadow(0 4px 30px rgba(255, 64, 129, 0.6)); }
}

.hero__date {
  font-family: var(--font-en);
  font-size: clamp(1rem, 3vw, 1.75rem);
  font-weight: 300;
  letter-spacing: 0.3em;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  margin-top: 1rem;
}

.hero__date::before,
.hero__date::after {
  content: '✦';
  display: inline-block;
  margin: 0 1rem;
  color: var(--day1-accent);
  animation: twinkle 2s ease-in-out infinite alternate;
}

@keyframes twinkle {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  color: #fff;
  opacity: 0.7;
  animation: scrollHint 2s ease-in-out infinite;
}

@keyframes scrollHint {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.7; }
  50% { transform: translate(-50%, 8px); opacity: 0.3; }
}

/* ---------- Sticky Day Nav ---------- */
.day-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.day-nav__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 1rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  color: var(--text-main);
  position: relative;
  transition: all 0.3s ease;
  overflow: hidden;
}

.day-nav__btn small {
  font-family: var(--font-en);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  font-weight: 400;
  margin-top: 0.25rem;
  opacity: 0.7;
}

.day-nav__btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.day-nav__btn--day1::before { background: var(--day1-grad); }
.day-nav__btn--day2::before { background: var(--day2-grad); }

.day-nav__btn:hover {
  color: #fff;
}

.day-nav__btn:hover::before {
  opacity: 1;
}

.day-nav__btn--day1::after,
.day-nav__btn--day2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 4px;
  transition: width 0.3s ease;
}

.day-nav__btn--day1::after { background: var(--day1-grad); }
.day-nav__btn--day2::after { background: var(--day2-grad); }

.day-nav__btn:hover::after { width: 60%; }

/* ---------- Day Section ---------- */
.day-section {
  padding: 5rem 1rem 3rem;
  position: relative;
  overflow: hidden;
}

.day-section--1 {
  background: linear-gradient(180deg, #fff 0%, #e0f7fa 100%);
}

.day-section--2 {
  background: linear-gradient(180deg, #fff 0%, #fce4ec 100%);
}

.day-section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.day-section__heading {
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
}

.day-section__label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.5em;
  padding: 0.5rem 1.5rem;
  border-radius: 999px;
  margin-bottom: 1.5rem;
  color: #fff;
  font-weight: 600;
}

.day-section--1 .day-section__label { background: var(--day1-grad); }
.day-section--2 .day-section__label { background: var(--day2-grad); }

.day-section__title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 10vw, 7rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  padding-top: 0.1em;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
}

.day-section--1 .day-section__title { background-image: var(--day1-grad); }
.day-section--2 .day-section__title { background-image: var(--day2-grad); }

.day-section__sub {
  font-family: var(--font-en);
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--text-sub);
}

/* ---------- Band Anchors ---------- */
.band-anchors {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
  margin: 0 auto 5rem;
  padding: 0 1rem;
  max-width: 480px;
}

.band-anchor {
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.05em;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  border: 2px solid;
  transition: all 0.3s ease;
  background: #fff;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.day-section--1 .band-anchor {
  border-color: var(--day1-primary);
  color: var(--day1-deep);
}

.day-section--2 .band-anchor {
  border-color: var(--day2-primary);
  color: var(--day2-deep);
}

.band-anchor::before {
  content: '';
  position: absolute;
  inset: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  z-index: -1;
}

.day-section--1 .band-anchor::before { background: var(--day1-grad); }
.day-section--2 .band-anchor::before { background: var(--day2-grad); }

.band-anchor:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.band-anchor:hover::before {
  transform: scaleX(1);
}

/* ---------- Band Block ---------- */
.band {
  margin-bottom: 6rem;
  scroll-margin-top: 100px;
}

.band__visual {
  position: relative;
  width: 100%;
  margin-bottom: 2rem;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.band__visual::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: 0.3;
}

.day-section--1 .band__visual::after { background: var(--day1-grad); }
.day-section--2 .band__visual::after { background: var(--day2-grad); }

.band__photo {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.band:hover .band__photo {
  transform: scale(1.03);
}

.band__number {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.3em;
  margin-bottom: 0.75rem;
  color: var(--text-sub);
}

.day-section--1 .band__number { color: var(--day1-primary); }
.day-section--2 .band__number { color: var(--day2-primary); }

.band__name {
  font-family: var(--font-display), var(--font-jp);
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  padding-top: 0.1em;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  word-break: break-word;
}

.day-section--1 .band__name { background-image: var(--day1-grad); }
.day-section--2 .band__name { background-image: var(--day2-grad); }

.band__concept {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 2rem;
  padding-left: 1.5rem;
  border-left: 4px solid;
  font-weight: 500;
}

.day-section--1 .band__concept { border-color: var(--day1-primary); }
.day-section--2 .band__concept { border-color: var(--day2-primary); }

.band__members {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  list-style: none;
}

.band__member {
  flex: 1 1 calc(50% - 0.75rem);
  min-width: 180px;
  background: #fff;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  border-left: 3px solid;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.band__member:hover {
  transform: translateX(4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.day-section--1 .band__member { border-left-color: var(--day1-secondary); }
.day-section--2 .band__member { border-left-color: var(--day2-secondary); }

.band__member-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.band__member-part {
  display: block;
  font-family: var(--font-en);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: 0.2rem;
  opacity: 0.7;
}

.day-section--1 .band__member-part { color: var(--day1-deep); }
.day-section--2 .band__member-part { color: var(--day2-deep); }

/* ---------- Footer ---------- */
.footer {
  background: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 100%);
  color: #fff;
  padding: 4rem 1rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(0, 184, 212, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(255, 64, 129, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

.footer__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.5rem);
  background: linear-gradient(135deg, #00f5ff 0%, #ffeb3b 50%, #ff4081 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 2rem;
  letter-spacing: -0.01em;
}

.footer__timetable {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2.5rem;
  background: linear-gradient(135deg, #00b8d4 0%, #ff4081 100%);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  border-radius: 999px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 3rem;
}

.footer__timetable:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(255, 64, 129, 0.4);
}

.footer__timetable::after {
  content: '→';
  font-size: 1.4rem;
  transition: transform 0.3s ease;
}

.footer__timetable:hover::after {
  transform: translateX(4px);
}

.footer__copyright {
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  opacity: 0.5;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ---------- Responsive: 525px breakpoint ---------- */
@media (min-width: 525px) {
  .hero__inner {
    padding: 3rem 2rem;
  }

  .day-section {
    padding: 7rem 2rem 5rem;
  }

  .band-anchor {
    font-size: 1.1rem;
    padding: 0.95rem 1.75rem;
  }

  .band {
    margin-bottom: 8rem;
  }

  .band__concept {
    font-size: 1.2rem;
  }

  .band__member {
    flex: 1 1 calc(33.333% - 0.5rem);
  }

  .day-nav__btn {
    font-size: 2rem;
    padding: 1.5rem;
  }

  .day-nav__btn small {
    font-size: 0.75rem;
  }
}

@media (min-width: 900px) {
  .band__member {
    flex: 1 1 calc(20% - 0.6rem);
  }
}

/* ---------- Desktop: Day1 / Day2 side-by-side ---------- */
@media (min-width: 1024px) {
  .days-wrapper {
    display: flex;
    align-items: stretch;
    max-width: var(--max-width);
    margin: 0 auto;
  }

  .days-wrapper .day-section {
    flex: 1 1 50%;
    min-width: 0;
    padding: 5rem 5.0rem 4rem;
  }

  /* Visual separator between days */
  .days-wrapper .day-section--1 {
    border-right: 1px solid rgba(0, 0, 0, 0.06);
  }

  /* Heading - scaled down for half-width column */
  .days-wrapper .day-section__heading {
    margin-bottom: 3rem;
  }

  .days-wrapper .day-section__title {
    font-size: clamp(2.5rem, 4.5vw, 4rem);
  }

  .days-wrapper .day-section__label {
    font-size: 0.7rem;
    padding: 0.45rem 1.2rem;
    margin-bottom: 1.25rem;
  }

  /* Anchors stay 1-column, narrower */
  .days-wrapper .band-anchors {
    max-width: 360px;
    margin-bottom: 4rem;
  }

  .days-wrapper .band-anchor {
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
  }

  /* Band blocks - scaled down */
  .days-wrapper .band {
    margin-bottom: 8rem;
  }

  .days-wrapper .band__name {
    font-size: clamp(2rem, 3.8vw, 3.5rem);
  }

  .days-wrapper .band__concept {
    font-size: 1rem;
    padding-left: 1.25rem;
    margin-bottom: 1.5rem;
  }

  .days-wrapper .band__number {
    font-size: 0.85rem;
  }

  /* Members back to 2-column inside narrow column */
  .days-wrapper .band__member {
    flex: 1 1 calc(50% - 0.4rem);
    min-width: 0;
    padding: 0.7rem 0.85rem;
  }

  .days-wrapper .band__member-name {
    font-size: 0.85rem;
  }

  .days-wrapper .band__member-part {
    font-size: 0.65rem;
  }
}