/* ==========================================================================
   LOGIC ROLL — Teaser Site (Dragalia-inspired layout)
   ========================================================================== */

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

:root {
  --color-base: #faf8f4;
  --color-cream: #fffef9;
  --color-sky-light: #e8f4fc;
  --color-sky-mid: #b8dff5;
  --color-sky-deep: #7ec8e8;
  --color-nav-active: #3d9ee8;

  --color-orange: #ff8c42;
  --color-orange-soft: #ffb366;
  --color-yellow: #ffd93d;
  --color-yellow-soft: #fff176;
  --color-green: #7dd87a;
  --color-green-soft: #a8e6a0;

  --color-text: #2d3a4a;
  --color-text-muted: #5a6b7d;
  --color-white: #ffffff;
  --color-nav-bar: #ffffff;

  --font-display: "Fredoka", "Ubuntu", system-ui, sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --shadow-card: 0 12px 40px rgba(45, 58, 74, 0.08);
  --shadow-card-hover: 0 20px 48px rgba(255, 140, 66, 0.22);
  --shadow-nav: 0 4px 24px rgba(45, 58, 74, 0.08);

  --nav-height: 72px;
  --title-height: min(72vh, 640px);

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 5rem;

  --transition: 0.35s cubic-bezier(0.34, 1.2, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-base);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

code {
  font-size: 0.85em;
  background: rgba(126, 200, 232, 0.2);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(184, 223, 245, 0.5) 0%, transparent 55%),
    linear-gradient(180deg, var(--color-sky-light) 0%, var(--color-base) 50%, var(--color-cream) 100%);
  pointer-events: none;
}

/* ==========================================================================
   Title screen — Carousel
   ========================================================================== */
.title-screen {
  position: relative;
  width: 100%;
  height: var(--title-height);
  min-height: 420px;
}

.carousel {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
}

.carousel__track {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s;
}

.carousel__slide.is-active {
  opacity: 1;
  visibility: visible;
  z-index: 1;
}

.carousel__visual {
  position: absolute;
  inset: 0;
  background-color: #000;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: contain;
  image-rendering: auto;
}

.carousel__visual--head1 {
  background-image: url("images/head_1.png");
}

.carousel__visual--head2 {
  background-image: url("images/head_2.png");
}

.carousel__mage-layout {
  position: absolute;
  inset: 0;
  background: #000;
  overflow: hidden;
}

.carousel__mage-art {
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(240px, 52%, 720px);
  height: 100%;
  background: url("images/hero-mage.png") no-repeat left bottom;
  background-size: auto min(115%, 100%);
  z-index: 1;
  pointer-events: none;
}

.carousel__hero-copy {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
  width: clamp(260px, 48%, 560px);
  padding: var(--space-lg) clamp(1rem, 3vw, 3rem);
  padding-bottom: calc(var(--nav-height) + var(--space-lg));
  box-sizing: border-box;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(0, 0, 0, 0.35) 18%,
    rgba(0, 0, 0, 0.72) 100%
  );
}

.carousel__catch--hero {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.05;
  white-space: normal;
  margin: 0 0 var(--space-md);
  padding: 0.35em 0.65em;
  background: linear-gradient(135deg, var(--color-nav-active) 0%, #2a6eb8 55%, #1e3a5f 100%);
  border-radius: var(--radius-md);
  box-shadow:
    0 10px 40px rgba(61, 158, 232, 0.45),
    0 4px 0 rgba(30, 90, 150, 0.8);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.carousel__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  text-align: right;
  padding: var(--space-xl) clamp(1.5rem, 6vw, 5rem);
  padding-bottom: calc(var(--nav-height) + var(--space-lg));
}

.carousel__catch {
  font-size: clamp(0.95rem, 2.5vw, 1.25rem);
  font-weight: 900;
  color: var(--color-white);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
  margin-bottom: var(--space-sm);
  max-width: 420px;
}

.carousel__catch.carousel__catch--hero {
  font-size: clamp(2.1rem, 5.2vw, 4.4rem);
  white-space: nowrap;
  max-width: 100%;
}

.carousel__logo {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.95;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.05em;
}

.carousel__logo-main {
  font-size: clamp(2.8rem, 10vw, 5rem);
  background: linear-gradient(135deg, var(--color-yellow) 0%, var(--color-orange) 50%, var(--color-green) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.3));
}

.carousel__logo-accent {
  font-family: "Ubuntu", var(--font-display);
  font-size: clamp(2.8rem, 10vw, 5rem);
  color: var(--color-white);
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  letter-spacing: 0.06em;
}

.carousel__sub {
  font-size: clamp(0.85rem, 2vw, 1rem);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  margin-top: 0.25rem;
  max-width: 420px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.carousel__sub.carousel__sub--hero {
  font-size: 3rem;
  line-height: 1.2;
  margin: 0;
  max-width: none;
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.8);
}

.carousel__sub-line1 {
  white-space: nowrap;
}

.carousel__overlay--terms {
  align-items: center;
  text-align: center;
}

.term-pair {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 400px;
}

.term-pair__item {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  text-align: left;
}

.term-pair__label {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  margin-right: 0.35rem;
}

.term-pair__label--roll {
  color: var(--color-orange);
}

.term-pair__label--logic {
  color: var(--color-nav-active);
}

.term-pair__mean {
  font-weight: 900;
  font-size: 1.1rem;
}

.term-pair__desc {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  font-weight: 700;
}

/* Carousel controls */
.carousel__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  color: var(--color-text);
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition), background var(--transition);
}

.carousel__arrow:hover {
  transform: translateY(-50%) scale(1.08);
  background: var(--color-white);
}

.carousel__arrow--prev { left: 1rem; }
.carousel__arrow--next { right: 1rem; }

.carousel__dots {
  position: absolute;
  bottom: calc(var(--nav-height) + 1rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 0.5rem;
}

.carousel__dot {
  width: 10px;
  height: 10px;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), transform var(--transition);
}

.carousel__dot.is-active,
.carousel__dot:hover {
  background: var(--color-white);
  transform: scale(1.2);
}

/* Event badge (carousel & about) */
.event-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.85rem 1.5rem;
  background: linear-gradient(145deg, var(--color-yellow) 0%, var(--color-orange) 100%);
  border-radius: var(--radius-lg);
  box-shadow:
    0 5px 0 rgba(230, 120, 50, 0.35),
    0 12px 32px rgba(255, 140, 66, 0.45);
  color: var(--color-text);
  position: relative;
}

.event-badge--compact {
  margin-top: var(--space-md);
}

.event-badge__spark {
  position: absolute;
  top: -6px;
  right: -4px;
  font-size: 1.1rem;
  color: var(--color-white);
}

.event-badge__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
}

.event-badge__date {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}

.event-badge__detail {
  font-size: 0.85rem;
  font-weight: 700;
}

/* ==========================================================================
   Global navigation (Dragalia-style white bar)
   ========================================================================== */
.global-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--color-nav-bar);
  box-shadow: var(--shadow-nav);
  margin-top: calc(-1 * var(--nav-height));
}

.global-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 2rem);
  gap: var(--space-md);
}

.global-nav__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  flex-shrink: 0;
  display: flex;
  gap: 0.2em;
}

.global-nav__logo-main {
  color: var(--color-orange);
}

.global-nav__logo-accent {
  color: var(--color-text);
}

.global-nav__menu {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-left: auto;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem clamp(1rem, 2.5vw, 2rem);
  min-width: 88px;
  border-bottom: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-item__en {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--color-text);
  line-height: 1.2;
}

.nav-item__ja {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.nav-item:hover .nav-item__en,
.nav-item.is-active .nav-item__en {
  color: var(--color-nav-active);
}

.nav-item.is-active {
  border-bottom-color: var(--color-nav-active);
}

.nav-item.is-active .nav-item__ja {
  color: var(--color-nav-active);
}

.global-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: none;
  background: var(--color-sky-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
}

.global-nav__toggle span {
  display: block;
  height: 3px;
  background: var(--color-text);
  border-radius: 2px;
}

.global-nav__mobile {
  display: none;
  flex-direction: column;
  background: var(--color-white);
  border-top: 1px solid rgba(126, 200, 232, 0.3);
  padding: var(--space-sm);
}

.global-nav__mobile:not([hidden]) {
  display: flex;
}

.global-nav__mobile .nav-item {
  width: 100%;
  flex-direction: row;
  justify-content: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: none;
  border-left: 3px solid transparent;
}

.global-nav__mobile .nav-item.is-active {
  border-left-color: var(--color-nav-active);
  background: var(--color-sky-light);
}

/* ==========================================================================
   Main content sections
   ========================================================================== */
.main-content {
  position: relative;
  z-index: 1;
}

.main-content--subpage {
  padding-top: calc(var(--nav-height) + var(--space-md));
}

.page-section {
  padding: var(--space-2xl) clamp(1rem, 4vw, 2rem);
  scroll-margin-top: calc(var(--nav-height) + 12px);
}

.page-section--top {
  background: linear-gradient(180deg, var(--color-white) 0%, var(--color-base) 100%);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-header--left {
  text-align: left;
}

.section-header__eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--color-orange);
  margin-bottom: var(--space-xs);
}

.section-header__title {
  font-size: clamp(1.4rem, 4vw, 1.85rem);
  font-weight: 900;
  margin-bottom: var(--space-sm);
}

.section-header__lead {
  font-size: clamp(0.9rem, 2.5vw, 1.05rem);
  color: var(--color-text-muted);
  line-height: 1.85;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.section-header--left .section-header__lead {
  margin: 0;
}

.pitch-lead {
  max-width: 100%;
}

.pitch-lead strong {
  color: var(--color-text);
  font-weight: 900;
}

.about-intro {
  margin-bottom: var(--space-xl);
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  border: 2px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-card);
  padding: var(--space-md) var(--space-lg) 0;
  overflow: hidden;
}

.about-intro__eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--color-orange);
  margin-bottom: var(--space-sm);
}

.about-intro__layout {
  display: grid;
  grid-template-columns: 1fr minmax(160px, 36%);
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
}

.about-intro__title {
  font-size: clamp(1.4rem, 4vw, 1.85rem);
  font-weight: 900;
  margin: 0 0 var(--space-sm);
  color: var(--color-text);
}

.about-intro__lead {
  font-size: clamp(0.9rem, 2.5vw, 1.05rem);
  color: var(--color-text-muted);
  line-height: 1.85;
  margin: 0;
}

.about-intro__lead strong {
  color: var(--color-text);
  font-weight: 900;
}

.about-intro__visual {
  line-height: 0;
}

.about-intro__visual img {
  width: 100%;
  max-width: 280px;
  height: auto;
  display: block;
  margin: 0 auto;
  mix-blend-mode: multiply;
}

/* ==========================================================================
   TOP — 更新情報
   ========================================================================== */
.update-block {
  margin-bottom: var(--space-xl);
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  border: 2px solid rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-card);
  padding: var(--space-md) var(--space-lg);
}

.update-list-panel {
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.update-block__actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 0.35rem;
}

.update-block__more {
  padding: 0.35rem 1.1rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: lowercase;
  color: var(--color-nav-active);
  background: var(--color-white);
  border: 2px solid var(--color-sky-mid);
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(126, 200, 232, 0.2);
  transition: transform var(--transition), box-shadow var(--transition), color var(--transition);
}

.update-block__more:hover {
  color: var(--color-orange);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(255, 140, 66, 0.25);
}

.update-block__more[hidden] {
  display: none;
}

.update-block__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin: 0 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-sky-mid);
}

.update-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.update-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 1rem;
  padding: 0.65rem 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.update-item + .update-item {
  border-top: 1px solid rgba(126, 200, 232, 0.35);
}

.update-item__badge {
  display: inline-block;
  padding: 0.2em 0.65em;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-orange), #ff6b35);
  border-radius: var(--radius-pill);
}

.update-item__date {
  font-weight: 700;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.update-item__text {
  font-weight: 700;
  color: var(--color-text);
}

.update-item__link {
  color: var(--color-nav-active);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.update-item__link:hover {
  color: var(--color-orange);
}

/* ==========================================================================
   TOP — YouTube & Twitter
   ========================================================================== */
.top-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.media-block {
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 2px solid rgba(255, 255, 255, 0.95);
  transition: transform var(--transition), box-shadow var(--transition);
}

.media-block:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.media-block__head {
  padding: var(--space-md) var(--space-md) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

.media-block__icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-orange), #ff6b35);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
}

.media-block__icon--x {
  background: linear-gradient(135deg, #2d3a4a, #1a1a2e);
}

.media-block__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  flex: 1;
}

.media-block__sub {
  width: 100%;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-left: calc(36px + 0.75rem);
  margin-top: -0.25rem;
  margin-bottom: var(--space-sm);
}

.media-block__body {
  padding: 0 var(--space-md) var(--space-md);
}

.youtube-wrap {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #1a2838;
}

.youtube-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.youtube-wrap .embed-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

.media-block__profile-link {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.media-block__profile-link:hover {
  color: var(--color-nav-active);
}

.x-profile-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(15, 20, 25, 0.12);
  transition: box-shadow var(--transition), transform var(--transition);
}

.x-profile-card:hover {
  box-shadow: 0 8px 28px rgba(15, 20, 25, 0.12);
  transform: translateY(-2px);
}

.x-profile-card__banner {
  aspect-ratio: 3 / 1;
  background: #cfd9de;
  overflow: hidden;
}

.x-profile-card__banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.x-profile-card__actions {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 0 1rem;
  margin-top: -2.5rem;
  position: relative;
  z-index: 1;
}

.x-profile-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 4px solid var(--color-white);
  object-fit: cover;
  background: var(--color-white);
  flex-shrink: 0;
}

.x-profile-card__follow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 7.5rem;
  padding: 0.45rem 1rem;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: #0f1419;
  background: var(--color-white);
  border: 1px solid #cfd9de;
  border-radius: var(--radius-pill);
  transition: background var(--transition);
}

.x-profile-card:hover .x-profile-card__follow {
  background: #f7f9f9;
}

.x-profile-card__body {
  padding: 0.5rem 1rem 0.9rem;
}

.x-profile-card__name {
  margin: 0 0 0.2rem;
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.3;
  color: #0f1419;
}

.x-profile-card__handle {
  margin: 0 0 0.4rem;
  font-size: 0.9rem;
  color: #536471;
}

.x-profile-card__bio {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.45;
  color: #0f1419;
}

.twitter-fallback-btn {
  display: inline-flex;
  margin-top: var(--space-sm);
  padding: 0.7rem 1.4rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-orange), #ff6b35);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 0 #e05a28;
  transition: transform var(--transition);
}

.twitter-fallback-btn:hover {
  transform: translateY(-2px);
}

.media-block__note {
  margin-top: var(--space-sm);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   TOP — ストアバッジ
   ========================================================================== */
.about-intro .platform-strip {
  margin: var(--space-md) calc(-1 * var(--space-lg)) 0;
  padding: var(--space-md) var(--space-lg);
  border-top: 2px solid var(--color-sky-mid);
  border-radius: 0;
  background: linear-gradient(
    180deg,
    var(--color-sky-light) 0%,
    rgba(184, 223, 245, 0.45) 100%
  );
  box-shadow: none;
}

.platform-strip__badges {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: 0.75rem;
}

.platform-strip__mask {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(45, 58, 74, 0.78);
  backdrop-filter: blur(2px);
  color: var(--color-white);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.4;
  text-align: center;
  pointer-events: none;
}

.store-badge {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: min(100%, 200px);
  flex: 1 1 180px;
  max-width: 220px;
  min-height: 58px;
  padding: 0.55rem 1rem;
  overflow: hidden;
  background: linear-gradient(145deg, #3d5266 0%, var(--color-text) 100%);
  border: 2px solid rgba(126, 200, 232, 0.55);
  border-radius: var(--radius-sm);
  color: var(--color-white);
}

.store-badge__icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.store-badge__icon--steam {
  color: #c7d5e0;
}

.store-badge__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.store-badge__brand {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.store-badge__sub {
  font-size: 0.62rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.78);
  margin-top: 0.15rem;
}

.store-badge--steam .store-badge__brand {
  font-size: 1.35rem;
  letter-spacing: 0.12em;
}

.platform-strip__note {
  margin: var(--space-md) 0 0;
  font-size: 0.68rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  text-align: center;
}

@media (max-width: 640px) {
  .platform-strip__badges {
    flex-direction: column;
    align-items: center;
  }

  .store-badge {
    max-width: 280px;
    width: 100%;
  }
}

/* ==========================================================================
   SYSTEM — Strategy flow with illustrations
   ========================================================================== */
#page-system {
  background: linear-gradient(180deg, var(--color-cream) 0%, var(--color-base) 100%);
}

.system-summary--top {
  margin-bottom: var(--space-xl);
}

.system-flow {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.system-step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.system-step--reverse .system-step__visual {
  order: 2;
}

.system-step--reverse .system-step__body {
  order: 1;
}

.system-step__visual {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-card);
  border: 2px solid rgba(255, 255, 255, 0.95);
  transition: transform var(--transition), box-shadow var(--transition);
}

.system-step:hover .system-step__visual {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.system-step__visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: contain;
}

.system-step__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  line-height: 1;
  background: linear-gradient(135deg, var(--color-orange), var(--color-yellow));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.85;
  margin-bottom: 0.25rem;
}

.system-step__tag {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-sm);
}

.system-step__tag--logic {
  background: linear-gradient(135deg, var(--color-sky-light), #d4ecff);
  color: var(--color-nav-active);
}

.system-step__tag--roll {
  background: linear-gradient(135deg, var(--color-yellow-soft), var(--color-orange-soft));
  color: var(--color-text);
}

.system-step__tag--finish {
  background: linear-gradient(135deg, #c8f0ff, var(--color-sky-mid));
  color: #2a6a8a;
}

.system-step__title {
  font-size: clamp(1.2rem, 3.2vw, 1.55rem);
  font-weight: 900;
  line-height: 1.45;
  margin-bottom: var(--space-md);
}

.system-step__text {
  font-size: clamp(0.92rem, 2.2vw, 1rem);
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: var(--space-sm);
}

.system-step__text strong {
  color: var(--color-text);
  font-weight: 900;
}

.system-step__text--sub {
  font-size: 0.88rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--color-orange-soft);
  margin-bottom: 0;
}

.system-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 2px solid rgba(126, 200, 232, 0.25);
}

.system-summary__roll,
.system-summary__logic {
  flex: 1 1 240px;
  max-width: 380px;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.system-summary__label {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  margin-bottom: 0.35rem;
}

.system-summary__roll .system-summary__label {
  color: var(--color-orange);
}

.system-summary__logic .system-summary__label {
  color: var(--color-nav-active);
}

.system-summary__arrow {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-green);
  flex-shrink: 0;
}

/* ==========================================================================
   GALLERY — Screenshots
   ========================================================================== */
.page-section--gallery {
  background: linear-gradient(180deg, var(--color-base) 0%, var(--color-white) 50%, var(--color-base) 100%);
}

.section-inner--wide {
  max-width: 1200px;
}

.gallery-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.gallery-item {
  display: block;
  width: 100%;
  padding: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: zoom-in;
  background: var(--color-cream);
  box-shadow: var(--shadow-card);
  border: 2px solid rgba(255, 255, 255, 0.95);
  transition: transform var(--transition), box-shadow var(--transition);
  aspect-ratio: 4 / 3;
}

.gallery-item:hover,
.gallery-item:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  outline: none;
}

.gallery-item:focus-visible {
  box-shadow: 0 0 0 3px var(--color-nav-active), var(--shadow-card-hover);
}

.gallery-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 12%;
  transform: scale(1.14);
}

.gallery-lightbox {
  padding: 0;
  border: none;
  max-width: none;
  max-height: none;
  width: 100%;
  height: 100%;
  background: transparent;
}

.gallery-lightbox::backdrop {
  background: rgba(20, 35, 50, 0.88);
  backdrop-filter: blur(4px);
}

.gallery-lightbox__inner {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  box-sizing: border-box;
}

.gallery-lightbox__img {
  max-width: min(96vw, 1280px);
  max-height: min(88vh, 900px);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

.gallery-lightbox__close {
  position: fixed;
  top: max(0.75rem, env(safe-area-inset-top));
  right: max(0.75rem, env(safe-area-inset-right));
  z-index: 2;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  font-size: 1.75rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-white);
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition);
}

.gallery-lightbox__close:hover {
  background: rgba(0, 0, 0, 0.65);
  transform: scale(1.05);
}

/* ==========================================================================
   CONTACT — Form
   ========================================================================== */
.page-section--contact {
  background: linear-gradient(180deg, var(--color-base) 0%, var(--color-sky-light) 100%);
}

.page-section--contact .section-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-section--contact .section-header {
  width: 100%;
  max-width: 720px;
}

.contact-form {
  position: relative;
  width: 100%;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  background: var(--color-cream);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 2px solid rgba(255, 255, 255, 0.95);
}

.form-row {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.form-required {
  font-size: 0.75rem;
  color: var(--color-orange);
  margin-left: 0.35rem;
}

.form-input {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-white);
  border: 2px solid rgba(126, 200, 232, 0.35);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-nav-active);
  box-shadow: 0 0 0 4px rgba(61, 158, 232, 0.15);
}

.form-input:invalid:not(:placeholder-shown) {
  border-color: #e85d5d;
}

.form-textarea {
  resize: vertical;
  min-height: 160px;
}

.contact-form__status {
  min-height: 1.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  text-align: center;
}

.contact-form__status--success {
  color: #2a8a4a;
}

.contact-form__status--error {
  color: #c44a3a;
}

.contact-form__status--pending {
  color: var(--color-text-muted);
}

.contact-form__submit {
  display: block;
  width: 100%;
  padding: 1rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-orange) 0%, #ff6b35 100%);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow:
    0 4px 0 #e05a28,
    0 10px 28px rgba(255, 107, 53, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.contact-form__submit:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow:
    0 6px 0 #e05a28,
    0 14px 32px rgba(255, 107, 53, 0.45);
}

.contact-form__notice {
  max-width: 640px;
  margin: 0 auto var(--space-md);
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-orange);
  text-align: center;
  background: rgba(255, 140, 66, 0.12);
  border: 2px solid rgba(255, 140, 66, 0.35);
  border-radius: var(--radius-sm);
}

.contact-form__submit:disabled,
.contact-form__submit.is-loading {
  opacity: 0.7;
  cursor: wait;
  transform: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  padding: var(--space-xl) clamp(1rem, 4vw, 2rem) var(--space-lg);
  background: linear-gradient(180deg, transparent 0%, rgba(232, 244, 252, 0.7) 100%);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.footer-contact-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-nav-active);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-contact-link:hover {
  color: var(--color-orange);
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.footer-x-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-orange) 0%, #ff6b35 100%);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 0 #e05a28, 0 10px 28px rgba(255, 107, 53, 0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}

.footer-x-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 0 #e05a28, 0 16px 36px rgba(255, 107, 53, 0.5);
}

.back-to-top {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 60;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-pill);
  display: grid;
  place-items: center;
  color: var(--color-white);
  background: linear-gradient(145deg, #3d5266 0%, var(--color-text) 100%);
  border: 2px solid rgba(126, 200, 232, 0.55);
  box-shadow: 0 10px 24px rgba(45, 58, 74, 0.18);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.back-to-top:hover {
  transform: translateY(-3px);
  border-color: var(--color-orange-soft);
  box-shadow: 0 14px 30px rgba(61, 158, 232, 0.22);
}

.back-to-top:focus-visible {
  outline: 4px solid rgba(61, 158, 232, 0.45);
  outline-offset: 4px;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .top-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

@media (max-width: 1100px) and (min-width: 769px) {
  .carousel__mage-art {
    width: clamp(200px, 46%, 520px);
    background-size: auto min(105%, 100%);
  }

  .carousel__hero-copy {
    width: clamp(220px, 54%, 460px);
    align-items: center;
    text-align: center;
    padding-left: clamp(0.75rem, 2vw, 1.5rem);
    padding-right: clamp(0.75rem, 2vw, 1.5rem);
    background: linear-gradient(
      90deg,
      rgba(0, 0, 0, 0.15) 0%,
      rgba(0, 0, 0, 0.55) 35%,
      rgba(0, 0, 0, 0.8) 100%
    );
  }

  .carousel__catch.carousel__catch--hero {
    white-space: normal;
    font-size: clamp(1.6rem, 4.2vw, 3rem);
  }
}

@media (max-width: 768px) {
  :root {
    --title-height: 55vh;
    --nav-height: 64px;
  }

  .title-screen {
    height: auto;
    min-height: 0;
    aspect-ratio: 1024 / 472;
  }

  .carousel {
    background: transparent;
  }

  .carousel__visual--head1 {
    background-size: cover;
    background-position: center center;
    background-color: transparent;
  }

  .global-nav {
    margin-top: calc(-1 * var(--nav-height));
  }

  .carousel__arrow,
  .carousel__dots {
    display: none;
  }

  .carousel__slide:not(:first-child) {
    display: none;
  }

  .carousel__slide:first-child {
    opacity: 1;
    visibility: visible;
    z-index: 1;
  }

  .about-intro__layout {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .about-intro__visual img {
    max-width: 240px;
  }

  .about-intro__body {
    text-align: center;
  }

  .global-nav__menu {
    display: none;
  }

  .global-nav__toggle {
    display: flex;
  }

  .carousel__overlay {
    align-items: center;
    text-align: center;
    padding-bottom: calc(var(--nav-height) + 2.5rem);
  }

  .carousel__mage-art {
    display: none;
  }

  .carousel__hero-copy {
    left: 0;
    right: 0;
    width: 100%;
    padding: var(--space-md) 1.25rem;
    padding-bottom: calc(var(--nav-height) + 1rem);
    align-items: center;
    text-align: center;
    background: #000;
  }

  .carousel__catch--hero {
    font-size: clamp(2.4rem, 9.5vw, 4.25rem);
    white-space: normal;
  }

  .carousel__catch.carousel__catch--hero {
    font-size: clamp(2.4rem, 9.5vw, 4.25rem);
    white-space: normal;
  }

  .carousel__sub.carousel__sub--hero {
    font-size: clamp(1.1rem, 5vw, 1.65rem);
    max-width: 26em;
  }

  .carousel__sub-line1 {
    white-space: normal;
  }

  .carousel__logo {
    align-items: center;
  }

  .carousel__arrow {
    width: 40px;
    height: 40px;
    font-size: 1.4rem;
  }

  .system-step,
  .system-step--reverse {
    grid-template-columns: 1fr;
  }

  .system-step--reverse .system-step__visual,
  .system-step--reverse .system-step__body {
    order: unset;
  }

  .system-summary {
    flex-direction: column;
    text-align: center;
  }

  .system-summary__arrow {
    transform: rotate(90deg);
  }

  .nav-item {
    min-width: auto;
  }
}

@media (max-width: 480px) {
  .carousel__dots {
    bottom: calc(var(--nav-height) + 0.5rem);
  }

  .event-badge {
    padding: 0.7rem 1rem;
    font-size: 0.9rem;
  }
}

/* ==========================================================================
   Scroll reveal (main blocks — not global nav)
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--fade {
  transform: none;
}

.reveal--fade.is-visible {
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}