@font-face {
  font-family: "Oxanium";
  src: url("/assets/fonts/oxanium-700.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Rajdhani";
  src: url("/assets/fonts/rajdhani-500.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "Rajdhani";
  src: url("/assets/fonts/rajdhani-600.woff2") format("woff2");
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "Rajdhani";
  src: url("/assets/fonts/rajdhani-700.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --night: #070b24;
  --midnight: #0d1642;
  --cyan: #20dce5;
  --cyan-text: #20dce5;
  --cyan-display: #20dce5;
  --violet: #7b5af8;
  --pink: #ff4d8a;
  --pink-text: #ff4d8a;
  --pearl: #f7f8ff;
  --cloud: #dde5ff;
  --ink: #f7f8ff;
  --muted: #aeb9df;
  --line: rgba(171, 184, 238, 0.32);
  --panel: rgba(9, 17, 54, 0.74);
  --panel-strong: rgba(8, 14, 44, 0.92);
  --page-glow: rgba(32, 220, 229, 0.11);
  --shadow: 0 28px 80px rgba(1, 4, 22, 0.52);
  --focus-ring: #7ff8ff;
}

html[data-theme="light"] {
  --night: #f7f8ff;
  --midnight: #dde5ff;
  --cyan: #17c9d4;
  --cyan-text: #0b7680;
  --cyan-display: #0b858e;
  --violet: #6444e8;
  --pink: #f33e78;
  --pink-text: #c52258;
  --pearl: #111d66;
  --cloud: #ffffff;
  --ink: #111d66;
  --muted: #53649c;
  --line: rgba(81, 103, 173, 0.22);
  --panel: rgba(255, 255, 255, 0.72);
  --panel-strong: rgba(250, 251, 255, 0.94);
  --page-glow: rgba(23, 201, 212, 0.15);
  --shadow: 0 28px 80px rgba(64, 85, 156, 0.18);
  --focus-ring: #5a35d6;
}

html {
  scroll-behavior: smooth;
}

.system-page {
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 14%, rgba(32, 220, 229, 0.12), transparent 22rem),
    radial-gradient(circle at 88% 18%, rgba(123, 90, 248, 0.16), transparent 28rem),
    linear-gradient(145deg, var(--night), color-mix(in srgb, var(--night) 88%, var(--midnight)));
  font-family: "Rajdhani", sans-serif;
  font-weight: 500;
  font-synthesis: none;
  font-kerning: normal;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.system-page :is(a, button):focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 4px;
}

.system-page :is(h1, h2, h3) {
  text-wrap: balance;
}

.system-page :is(p, li) {
  text-wrap: pretty;
}

.system-page :is(
  .mode-number,
  .step-index,
  .guide-nav a,
  .anima-tile.missing b,
  .rule-card > span,
  .duel-steps > li > span,
  .info-card h3,
  .tips-grid h3,
  .duel-player span,
  .duel-player strong,
  .duel-question p,
  .duel-question i,
  .privacy-toc summary,
  .system-document-card h2,
  .system-document-card .email-button,
  .support-channel-label,
  .support-response,
  .email-copy-card a,
  .copy-email-button,
  .support-info-card h2,
  .support-notice strong
) {
  font-weight: 700;
}

.system-page::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.38;
  background-image:
    linear-gradient(rgba(91, 115, 190, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 115, 190, 0.12) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

.system-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  padding: 0 4vw;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--night) 78%, transparent);
  backdrop-filter: blur(22px) saturate(130%);
}

.system-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: "Rajdhani", sans-serif;
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  line-height: 1;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
}

.brand-mark img,
.theme-art img {
  max-width: 100%;
}

.brand-mark .for-light,
.theme-art .for-light {
  display: none;
}

html[data-theme="light"] .brand-mark .for-dark,
html[data-theme="light"] .theme-art .for-dark {
  display: none;
}

html[data-theme="light"] .brand-mark .for-light,
html[data-theme="light"] .theme-art .for-light {
  display: block;
}

.system-header nav {
  display: flex;
  align-items: center;
  gap: 1.7rem;
}

.system-header nav a {
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.system-header nav a:hover,
.system-header nav a:focus-visible {
  color: var(--cyan-text);
}

.language-toggle {
  display: inline-flex;
  height: 36px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: color-mix(in srgb, var(--panel-strong) 84%, transparent);
  align-items: center;
}

.language-toggle button {
  min-width: 34px;
  height: 28px;
  padding: 0 8px;
  color: var(--muted);
  border: 0;
  border-radius: 8px;
  background: transparent;
  font-family: "Rajdhani", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.language-toggle button[aria-pressed="true"] {
  color: var(--ink);
  background: color-mix(in srgb, var(--violet) 22%, var(--panel-strong));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--violet) 45%, transparent);
}

.theme-toggle {
  display: grid;
  width: 42px;
  height: 42px;
  padding: 0;
  overflow: hidden;
  color: var(--cyan-text);
  border: 1px solid color-mix(in srgb, var(--cyan) 58%, var(--line));
  border-radius: 13px;
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  cursor: pointer;
  place-items: center;
}

.theme-toggle span {
  grid-area: 1 / 1;
  font-size: 1.15rem;
}

.theme-toggle-sun {
  opacity: 0;
  transform: rotate(-45deg) scale(0.6);
}

.theme-toggle-moon {
  opacity: 1;
}

html[data-theme="light"] .theme-toggle-sun {
  opacity: 1;
  transform: none;
}

html[data-theme="light"] .theme-toggle-moon {
  opacity: 0;
  transform: rotate(45deg) scale(0.6);
}

.mobile-menu-toggle,
.mobile-site-menu {
  display: none;
}

.mobile-menu-toggle {
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 13px;
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  cursor: pointer;
  place-content: center;
}

.mobile-menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 2px 0;
  border-radius: 999px;
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
}

.mobile-menu-toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mobile-menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-site-menu[hidden] { display: none; }

.system-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: min(1380px, 92vw);
  min-height: calc(100vh - 74px);
  margin: 0 auto;
  padding: clamp(32px, 4vw, 58px) 0;
  align-items: stretch;
}

.system-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 34px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--panel-strong) 90%, transparent), var(--panel)),
    radial-gradient(circle at 10% 0, var(--page-glow), transparent 45%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), var(--shadow);
}

.system-panel::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  border-radius: inherit;
  background: linear-gradient(125deg, rgba(255, 255, 255, 0.05), transparent 30%, rgba(32, 220, 229, 0.04));
}

.hero-copy {
  display: flex;
  min-height: clamp(620px, calc(100vh - 150px), 780px);
  min-width: 0;
  padding: clamp(40px, 6vw, 82px);
  flex-direction: column;
  justify-content: center;
}

.hero-lockup {
  position: relative;
  z-index: 1;
  width: min(430px, 72%);
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.hero-lockup img {
  display: block;
  width: 100%;
  height: auto;
}

.system-hero h1 {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 0 18px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-weight: 700;
  font-size: clamp(3rem, 7vw, 7rem);
  line-height: 1.01;
  letter-spacing: -0.025em;
  text-transform: uppercase;
}

.system-hero h1 em {
  color: transparent;
  background: linear-gradient(90deg, var(--cyan-display), var(--violet), var(--pink));
  background-clip: text;
  font-style: normal;
}

html[data-language="en"] .system-hero h1 {
  font-size: clamp(3rem, 7vw, 7rem);
}

.hero-lead {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.5vw, 1.32rem);
  line-height: 1.6;
}

.system-actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.system-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px 12px 3px 12px;
  font-family: "Rajdhani", sans-serif;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  text-transform: uppercase;
}

.system-button.primary {
  color: #06122c;
  border: 1px solid var(--cyan);
  background: linear-gradient(135deg, #7ff8ff, var(--cyan));
  box-shadow: 0 0 28px rgba(32, 220, 229, 0.25);
}

.system-button.secondary {
  color: var(--ink);
  border: 1px solid color-mix(in srgb, var(--violet) 65%, var(--line));
  background: color-mix(in srgb, var(--panel) 82%, transparent);
}

.release-note {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 18px 0 0;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.release-note i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 12px var(--pink);
}

.hero-console {
  display: flex;
  min-height: 600px;
  min-width: 0;
  padding: clamp(26px, 3.4vw, 46px);
  flex-direction: column;
}

.console-heading,
.console-status {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.console-heading p {
  margin: 0;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-weight: 700;
  font-size: clamp(1.4rem, 2.5vw, 2.2rem);
  letter-spacing: 0.12em;
}

.console-heading span,
.console-status {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.grid-orbit {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(430px, 90%);
  aspect-ratio: 1;
  margin: auto;
  border: 2px solid color-mix(in srgb, var(--muted) 55%, transparent);
  border-top-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
  place-items: center;
}

.grid-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(8px, 1.2vw, 14px);
  width: 72%;
}

.locked-grid-art {
  grid-template-columns: 1fr;
  width: 80%;
  height: 84%;
  place-items: center;
}

.locked-grid-art img {
  grid-area: 1 / 1;
  width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 12px 18px rgba(2, 5, 25, 0.34));
}

html[data-theme="light"] .locked-grid-art img {
  filter: drop-shadow(0 13px 18px rgba(50, 64, 130, 0.2));
}

.grid-cell {
  position: relative;
  display: grid;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  place-items: center;
}

.grid-cell::before {
  position: absolute;
  inset: 7px;
  content: "";
  border: 1px solid color-mix(in srgb, var(--muted) 42%, transparent);
  clip-path: inherit;
}

.grid-cell img {
  position: relative;
  z-index: 2;
  width: 90%;
  height: 90%;
  object-fit: contain;
  filter: saturate(0.92) contrast(1.08) drop-shadow(0 8px 12px rgba(0, 0, 0, 0.42));
}

html[data-theme="light"] .grid-cell img {
  filter: saturate(0.75) contrast(1.05) drop-shadow(0 9px 12px rgba(40, 52, 105, 0.26));
}

.grid-cell.cyan { border-color: var(--cyan-display); box-shadow: 0 0 20px rgba(32, 220, 229, 0.24); }
.grid-cell.violet { border-color: var(--violet); box-shadow: 0 0 20px rgba(123, 90, 248, 0.28); }
.grid-cell.pink { border-color: var(--pink); box-shadow: 0 0 28px rgba(255, 77, 138, 0.38); }
.grid-cell.active { transform: scale(1.07); }

.orbit-dot {
  position: absolute;
  width: 13px;
  height: 13px;
  border: 3px solid var(--cyan-display);
  border-radius: 50%;
  background: var(--night);
  box-shadow: 0 0 14px rgba(32, 220, 229, 0.5);
}

.dot-one { top: 5%; left: 21%; }
.dot-two { top: 34%; right: -1%; border-color: var(--violet); }
.dot-three { bottom: 4%; right: 20%; }

.grid-trace {
  position: absolute;
  z-index: 3;
  width: 2px;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}

.trace-a {
  top: 22%;
  left: 37%;
  height: 27%;
  color: var(--cyan-display);
  transform: rotate(-38deg);
}

.trace-b {
  bottom: 15%;
  left: 50%;
  height: 26%;
  color: var(--pink);
}

.console-status {
  gap: 14px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.console-status span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.console-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.status-cyan { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.status-pink { background: var(--pink); box-shadow: 0 0 10px var(--pink); }

@media (max-width: 980px) {
  .system-header nav a:nth-child(-n + 2) { display: none; }

  .system-hero {
    grid-template-columns: 1fr;
    padding-top: 26px;
  }

  .hero-copy { min-height: auto; }
  .hero-console { min-height: auto; }
}

@media (max-width: 620px) {
  .system-header { padding: 0 12px; }
  .system-brand { gap: 7px; font-size: 0.9rem; }
  .system-header > nav:not(.mobile-site-menu) { gap: 6px; }
  .system-header > nav:not(.mobile-site-menu) > a { display: none; }
  .mobile-menu-toggle { display: grid; }
  .mobile-site-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 12px;
    left: 12px;
    display: grid;
    gap: 6px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: color-mix(in srgb, var(--panel-strong) 96%, var(--night));
    box-shadow: var(--shadow);
    backdrop-filter: blur(22px) saturate(130%);
  }
  .system-header .mobile-site-menu a:nth-child(n) {
    display: flex;
    min-height: 48px;
    padding: 0 16px;
    border-radius: 12px;
    align-items: center;
  }
  .system-header .mobile-site-menu a:hover,
  .system-header .mobile-site-menu a:focus-visible,
  .system-header .mobile-site-menu a[aria-current="page"] {
    color: var(--ink);
    background: color-mix(in srgb, var(--violet) 18%, var(--panel));
  }
  .language-toggle { height: 44px; padding: 1px; }
  .language-toggle button { min-width: 34px; height: 40px; padding-inline: 6px; }
  .theme-toggle { width: 44px; height: 44px; }
  .system-hero { width: min(100% - 24px, 1380px); }
  .system-panel { border-radius: 24px; }
  .hero-copy, .hero-console { padding: 24px 20px; }
  .hero-lockup { width: min(360px, 94%); }
  .system-actions { flex-direction: column; }
  .system-button { width: 100%; }
  .console-heading { align-items: flex-start; gap: 8px; flex-direction: column; }
  .grid-orbit { width: 100%; margin-block: 32px 24px; }
  .console-status { font-size: 0.62rem; }
}

@media (max-width: 360px) {
  .system-brand > span:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-menu-toggle span { transition: none; }
}

.system-section {
  width: min(1380px, 92vw);
  margin: 0 auto;
  padding: clamp(64px, 7vw, 104px) 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 34px;
}

html[data-language="en"] .modes-section .section-heading {
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

html[data-language="en"] .modes-section .section-heading h2 {
  font-size: clamp(2.9rem, 4.8vw, 4.3rem);
  line-height: 1.08;
}

html[data-language="en"] .modes-section .section-heading > p {
  max-width: 34rem;
  margin: 0;
  justify-self: start;
}

.section-heading > p,
.how-intro > p,
.system-copy > p {
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.65;
}

.section-heading > p {
  max-width: 760px;
  margin: 0;
}

.section-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 17px;
  color: var(--cyan-text) !important;
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
  font-size: 0.76rem !important;
  letter-spacing: 0.14em;
}

.section-eyebrow span {
  width: 42px;
  height: 1px;
  background: currentColor;
}

.system-section h2,
.system-page .system-document-card h1,
.inner-hero h1 {
  margin: 0;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-weight: 700;
  font-size: clamp(2.4rem, 5vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  text-transform: uppercase;
}

.system-section h2 em,
.inner-hero h1 em {
  color: transparent;
  background: linear-gradient(90deg, var(--cyan-display), var(--violet), var(--pink));
  background-clip: text;
  font-style: normal;
}

.modes-section {
  border-top: 1px solid var(--line);
  scroll-margin-top: 74px;
}

.mode-gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.mode-card {
  position: relative;
  display: grid;
  min-height: 410px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--panel-strong) 92%, transparent), var(--panel)),
    radial-gradient(circle at 90% 10%, var(--page-glow), transparent 35%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 22px 64px rgba(2, 6, 30, 0.2);
}

.element-mode {
  grid-column: span 7;
  grid-template-columns: minmax(250px, 0.82fr) minmax(270px, 1fr);
}

.duel-mode {
  grid-column: span 5;
  grid-template-rows: auto 1fr;
}

.store-mode {
  grid-column: span 12;
  grid-template-columns: minmax(190px, 0.34fr) 1fr;
  min-height: 240px;
  align-items: center;
}

.mode-number {
  position: absolute;
  top: 22px;
  right: 25px;
  z-index: 2;
  color: color-mix(in srgb, var(--muted) 48%, transparent);
  font-family: "Oxanium", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
}

.mode-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 4vw, 52px);
}

.mode-type {
  margin: 0 0 10px;
  color: var(--cyan-text);
  font-family: "Rajdhani", sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.13em;
}

.mode-card h3,
.step-list h3,
.guide-card h2,
.guide-card h3,
.rule-card h3 {
  margin: 0 0 13px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-weight: 700;
  font-size: clamp(1.55rem, 2.8vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
}

.mode-copy > p:not(.mode-type) {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.55;
}

.mode-copy ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 20px 0;
  list-style: none;
}

.mode-copy li,
.coming-pill,
.guide-chip {
  padding: 7px 10px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.mode-copy > a {
  color: var(--cyan-text);
  font-family: "Rajdhani", sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.mode-grid-preview {
  width: min(420px, 88%);
  margin: auto;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--pink) 8%, transparent), transparent 48%);
}

.anima-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: min(330px, 80%);
  margin: auto;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 77, 138, 0.12), transparent 38%),
    color-mix(in srgb, var(--night) 74%, transparent);
}

.anima-grid::before {
  position: absolute;
  inset: -28%;
  z-index: -1;
  content: "";
  border: 1px solid color-mix(in srgb, var(--cyan) 35%, transparent);
  border-top-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
}

.anima-tile {
  position: relative;
  display: grid;
  aspect-ratio: 1;
  overflow: hidden;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  place-items: center;
}

.anima-tile img {
  width: 90%;
  height: 90%;
  object-fit: contain;
  filter: saturate(0.82) contrast(1.08);
}

.anima-tile.cyan { border-color: var(--cyan-display); box-shadow: 0 0 18px rgba(32, 220, 229, 0.25); }
.anima-tile.violet { border-color: var(--violet); box-shadow: 0 0 18px rgba(123, 90, 248, 0.28); }
.anima-tile.pink { border-color: var(--pink); box-shadow: 0 0 24px rgba(255, 77, 138, 0.36); transform: scale(1.08); }

.duel-field {
  position: relative;
  display: grid;
  min-height: 215px;
  margin: 0 28px 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--violet) 10%, transparent), transparent 48%),
    color-mix(in srgb, var(--night) 72%, transparent);
  place-items: center;
}

.duel-art img {
  position: absolute;
  inset: 0;
  grid-area: 1 / 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(1.02) contrast(1.02);
}

.store-icon {
  width: min(180px, calc(100% - 52px));
  aspect-ratio: 1;
  margin: 30px auto;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--cyan-display) 44%, var(--line));
  border-radius: 30%;
  background: var(--panel-strong);
  box-shadow:
    0 20px 45px rgba(2, 6, 30, 0.28),
    0 0 42px color-mix(in srgb, var(--violet) 20%, transparent);
}

.store-icon img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.store-mode .mode-copy {
  max-width: 780px;
  padding-block: 34px;
}

.store-mode .coming-pill {
  align-self: flex-start;
  margin-top: 20px;
}

.how-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: clamp(40px, 7vw, 100px);
  align-items: start;
  border-top: 1px solid var(--line);
}

.how-intro {
  position: sticky;
  top: 120px;
}

.how-intro .system-button { margin-top: 18px; }

.step-list {
  display: grid;
  gap: 16px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.step-list li {
  display: grid;
  grid-template-columns: auto 92px 1fr;
  gap: 24px;
  min-height: 150px;
  padding: 24px;
  align-items: center;
}

.step-list h3 {
  margin-bottom: 6px;
  font-size: 1.42rem;
}

.step-list p {
  margin: 0;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.55;
}

.step-index {
  align-self: start;
  color: var(--cyan-text);
  font-family: "Oxanium", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.step-icon {
  position: relative;
  display: grid;
  width: 74px;
  aspect-ratio: 1;
  color: var(--cyan-display);
  border: 1px solid currentColor;
  background: color-mix(in srgb, currentColor 6%, transparent);
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  place-items: center;
}

.step-icon i {
  display: block;
  width: 25px;
  aspect-ratio: 1;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.scan-icon::after {
  position: absolute;
  right: 12px;
  bottom: 14px;
  width: 20px;
  height: 2px;
  content: "";
  background: currentColor;
  transform: rotate(42deg);
}

.connect-icon { color: var(--violet); }
.connect-icon i,
.connect-icon b {
  position: absolute;
  width: 13px;
  aspect-ratio: 1;
  border: 2px solid currentColor;
  border-radius: 50%;
}
.connect-icon i { top: 18px; left: 16px; }
.connect-icon b { right: 16px; bottom: 18px; }
.connect-icon::after {
  width: 33px;
  height: 2px;
  content: "";
  background: currentColor;
  transform: rotate(38deg);
}

.choose-icon { color: var(--pink); }
.choose-icon i {
  width: 32px;
  border-radius: 0;
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
}

.play-system { padding: 16px 0 clamp(64px, 7vw, 96px); }

.play-system-panel {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(32px, 4vw, 56px);
  padding: clamp(30px, 4vw, 56px);
  align-items: center;
}

.system-copy { position: relative; z-index: 2; }

.color-key {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.color-key span {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
  font-size: 0.8rem;
  font-weight: 700;
}

.color-key i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.key-cyan { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.key-violet { background: var(--violet); box-shadow: 0 0 8px var(--violet); }
.key-pink { background: var(--pink); box-shadow: 0 0 8px var(--pink); }

.app-navigation-preview {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 25px;
  background: color-mix(in srgb, var(--panel-strong) 88%, transparent);
}

.app-navigation-preview span {
  display: flex;
  min-height: 76px;
  padding: 10px 6px;
  color: var(--muted);
  border: 1px solid transparent;
  border-radius: 18px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.app-navigation-preview i {
  margin-bottom: 6px;
  color: currentColor;
  font-size: 1.65rem;
  font-style: normal;
}

.app-navigation-preview .active {
  color: var(--cyan-text);
  border-color: color-mix(in srgb, var(--cyan) 35%, var(--line));
  background: linear-gradient(145deg, rgba(32, 220, 229, 0.18), rgba(123, 90, 248, 0.18));
  box-shadow: 0 0 25px rgba(32, 220, 229, 0.16);
}

.system-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  width: min(1380px, 92vw);
  min-height: 100px;
  margin: 0 auto;
  color: var(--muted);
  border-top: 1px solid var(--line);
  align-items: center;
}

.system-footer p { margin: 0; text-align: center; }
.system-footer nav { display: flex; gap: 18px; justify-content: flex-end; }
.system-footer nav a { color: var(--muted); font-weight: 700; text-decoration: none; }
.system-footer nav a:hover { color: var(--cyan-text); }

@media (max-width: 1040px) {
  .element-mode,
  .duel-mode { grid-column: span 12; }
  .duel-mode { grid-template-columns: 0.85fr 1.15fr; grid-template-rows: 1fr; }
  .duel-field { margin: 28px; align-self: stretch; }
  .how-section { grid-template-columns: 1fr; }
  .how-intro { position: static; }
  .play-system-panel { grid-template-columns: 1fr; }
  .system-footer { grid-template-columns: 1fr; padding: 30px 0; text-align: center; }
  .system-footer .system-brand, .system-footer nav { justify-content: center; }
}

@media (max-width: 760px) {
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .element-mode,
  .duel-mode,
  .store-mode { grid-template-columns: 1fr; }
  .mode-card { min-height: auto; }
  .element-mode .mode-grid-preview { margin-bottom: 34px; }
  .store-mode { padding-top: 18px; text-align: center; }
  .mode-copy { align-items: flex-start; }
  .store-mode .mode-copy { align-items: center; padding-top: 8px; }
  .store-mode .coming-pill { align-self: center; }
  .duel-field { min-height: 240px; }
  .step-list li { grid-template-columns: auto 1fr; }
  .step-list li > div:last-child { grid-column: 2; }
  .app-navigation-preview { grid-template-columns: repeat(5, minmax(74px, 1fr)); overflow-x: auto; }
}

@media (max-width: 520px) {
  .system-section { width: min(100% - 24px, 1380px); padding-block: 56px; }
  .mode-grid-preview { width: calc(100% - 42px); }
  .anima-grid { width: calc(100% - 42px); padding: 15px; }
  .step-list li { gap: 14px; padding: 22px 18px; }
  .step-icon { width: 62px; }
  .play-system-panel { padding: 28px 20px; }
  .system-footer { width: min(100% - 24px, 1380px); }
}

.inner-main {
  width: min(1380px, 92vw);
  margin: 0 auto;
}

.inner-hero {
  display: grid;
  grid-template-columns: 1.2fr 0.62fr;
  gap: 60px;
  min-height: 520px;
  margin-top: clamp(28px, 5vw, 64px);
  padding: clamp(36px, 6vw, 82px);
  align-items: end;
}

.inner-hero > * { position: relative; z-index: 2; }

.inner-hero > div > p:last-child {
  max-width: 710px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.3rem);
  line-height: 1.65;
}

.guide-nav {
  display: grid;
  gap: 10px;
}

.guide-nav a {
  display: flex;
  min-height: 62px;
  padding: 0 16px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 14px 14px 3px 14px;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
  font-family: "Oxanium", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  align-items: center;
}

.guide-nav a:hover,
.guide-nav a:focus-visible {
  color: var(--cyan-text);
  border-color: var(--cyan-text);
}

.guide-nav span {
  width: 34px;
  color: var(--cyan-text);
}

.guide-section {
  padding: clamp(92px, 11vw, 160px) 0;
  scroll-margin-top: 80px;
}

.guide-section + .guide-section {
  border-top: 1px solid var(--line);
}

.guide-feature {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 40px;
  padding: clamp(28px, 5vw, 58px);
}

.guide-board-wrap,
.guide-rules { position: relative; z-index: 2; }

.anima-grid.large {
  width: min(420px, 88%);
}

.anima-tile.missing {
  color: var(--cyan-display);
  border-color: var(--cyan-display);
  background: color-mix(in srgb, var(--cyan) 8%, var(--panel-strong));
  box-shadow: inset 0 0 22px rgba(32, 220, 229, 0.12), 0 0 24px rgba(32, 220, 229, 0.18);
}

.anima-tile.missing b {
  font-family: "Oxanium", sans-serif;
  font-size: clamp(1.2rem, 3vw, 2.2rem);
}

.guide-rules {
  display: grid;
  align-content: center;
}

.rule-card {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.rule-card:last-child { border-bottom: 0; }

.rule-card > span,
.duel-steps > li > span {
  display: grid;
  width: 44px;
  height: 44px;
  color: var(--cyan-text);
  border: 1px solid currentColor;
  background: color-mix(in srgb, var(--cyan) 7%, transparent);
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  font-family: "Oxanium", sans-serif;
  font-size: 0.75rem;
  place-items: center;
}

.rule-card h3 { margin-bottom: 6px; font-size: 1.15rem; }
.rule-card p,
.info-card p,
.duel-steps p,
.tips-grid p,
.guide-cta p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.55;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 16px;
}

.info-card,
.tips-grid article {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
}

.info-card .guide-chip { display: inline-flex; margin: 0 0 30px; }
.info-card h3,
.tips-grid h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-size: 1.1rem;
}

.duel-guide-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 24px;
}

.duel-stage {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 0.8fr 1fr;
  gap: 14px;
  min-height: 470px;
  padding: clamp(26px, 5vw, 55px);
  align-items: center;
}

.duel-stage::before {
  position: absolute;
  inset: 15%;
  content: "";
  opacity: 0.58;
  background:
    radial-gradient(circle at 20% 50%, rgba(255, 77, 138, 0.55), transparent 30%),
    radial-gradient(circle at 80% 50%, rgba(32, 220, 229, 0.55), transparent 30%);
  filter: blur(24px);
}

.duel-player,
.duel-question {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.duel-player img {
  width: min(180px, 100%);
  filter: drop-shadow(0 0 24px currentColor);
}

.duel-player span {
  margin-top: 14px;
  color: currentColor;
  font-family: "Oxanium", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
}

.duel-player strong {
  margin-top: 8px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-size: 2rem;
}

.pink-player { color: var(--pink-text); }
.cyan-player { color: var(--cyan-text); }

.duel-question span {
  display: grid;
  width: 74px;
  aspect-ratio: 1;
  color: var(--violet);
  border: 1px solid currentColor;
  background: color-mix(in srgb, var(--violet) 10%, var(--panel-strong));
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  font-size: 1.7rem;
  box-shadow: 0 0 28px rgba(123, 90, 248, 0.28);
  place-items: center;
}

.duel-question p {
  margin: 22px 0 12px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-size: 0.72rem;
  line-height: 1.5;
  letter-spacing: 0.07em;
}

.duel-question i {
  color: var(--pink-text);
  font-family: "Oxanium", sans-serif;
  font-size: 1.3rem;
  font-style: normal;
}

.duel-steps {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.duel-steps li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
}

.duel-steps h3 { margin: 0 0 6px; font-size: 1rem; }

.tips-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.tips-grid article > span {
  display: grid;
  width: 58px;
  aspect-ratio: 1;
  margin-bottom: 40px;
  color: var(--cyan-display);
  border: 1px solid currentColor;
  background: color-mix(in srgb, var(--cyan) 6%, transparent);
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  font-size: 1.4rem;
  place-items: center;
}

.tips-grid article:nth-child(2) > span { color: var(--violet); }
.tips-grid article:nth-child(3) > span { color: var(--pink); }
.tips-grid article:nth-child(4) > span { color: var(--cyan-display); }

.guide-cta {
  display: grid;
  grid-template-columns: 1.1fr 0.65fr;
  gap: 60px;
  margin-bottom: 80px;
  padding: clamp(34px, 6vw, 72px);
  align-items: end;
}

.guide-cta > * { position: relative; z-index: 2; }
.guide-cta h2 { font-size: clamp(2.2rem, 4.5vw, 4.6rem); }
.guide-cta .system-button { margin-top: 18px; }

@media (max-width: 960px) {
  .inner-hero,
  .guide-feature,
  .duel-guide-grid,
  .guide-cta { grid-template-columns: 1fr; }
  .guide-nav { grid-template-columns: repeat(3, 1fr); }
  .guide-nav a { align-items: flex-start; flex-direction: column; justify-content: center; }
  .tips-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .inner-main { width: min(100% - 24px, 1380px); }
  .inner-hero { min-height: auto; gap: 30px; padding: 30px 22px; }
  .guide-nav { grid-template-columns: 1fr; }
  .guide-nav a { align-items: center; flex-direction: row; }
  .guide-feature { padding: 26px 18px; }
  .info-grid,
  .tips-grid { grid-template-columns: 1fr; }
  .duel-stage { grid-template-columns: 1fr 0.7fr 1fr; min-height: 360px; padding: 24px 12px; }
  .duel-player span { font-size: 0.62rem; }
  .duel-question p { font-size: 0.58rem; }
}

@media (max-width: 480px) {
  .duel-stage { grid-template-columns: 1fr 1fr; }
  .duel-question { grid-column: 1 / -1; grid-row: 1; }
  .duel-player { grid-row: 2; }
  .tips-grid article > span { margin-bottom: 24px; }
}

.system-document-shell {
  width: min(1000px, 92vw);
  margin: 0 auto;
  padding: clamp(38px, 7vw, 90px) 0;
}

.system-document-card {
  padding: clamp(30px, 6vw, 76px);
}

.system-document-card > * {
  position: relative;
  z-index: 2;
}

.system-page .system-document-card h1 {
  max-width: 760px;
  margin-bottom: 20px;
}

.system-document-card .document-intro {
  margin: 0 0 12px;
  color: var(--cyan-text);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
}

.system-document-card .updated {
  margin: 0 0 36px;
  color: var(--muted);
  font-size: 0.86rem;
  letter-spacing: 0.04em;
}

.privacy-toc {
  margin: 24px 0 34px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 80%, transparent);
}

.privacy-toc summary {
  display: flex;
  min-height: 52px;
  padding: 0 18px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  list-style: none;
  align-items: center;
  justify-content: space-between;
  text-transform: uppercase;
}

.privacy-toc summary::-webkit-details-marker { display: none; }
.privacy-toc summary::after { color: var(--cyan-text); content: "+"; font-size: 1.2rem; }
.privacy-toc[open] summary::after { content: "−"; }

.privacy-toc nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  padding: 0 10px 10px;
}

.system-document-card .privacy-toc a {
  display: flex;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--muted);
  border-radius: 10px;
  font-weight: 700;
  line-height: 1.25;
  text-decoration: none;
  align-items: center;
}

.system-document-card .privacy-toc a:hover,
.system-document-card .privacy-toc a:focus-visible {
  color: var(--cyan-text);
  background: color-mix(in srgb, var(--cyan) 8%, var(--panel));
}

.system-document-card h2[id] { scroll-margin-top: 96px; }

.system-document-card > p:not(.section-eyebrow):not(.document-intro):not(.updated),
.system-document-card li {
  color: var(--muted);
  font-size: 1.03rem;
  line-height: 1.72;
}

.system-document-card h2 {
  margin: 42px 0 12px;
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-size: clamp(1.2rem, 2.3vw, 1.8rem);
  letter-spacing: -0.025em;
}

.system-document-card a { color: var(--cyan-text); }

.system-document-card .email-button {
  display: inline-flex;
  min-height: 50px;
  padding: 0 20px;
  margin: 14px 0 8px;
  color: #06122c;
  border: 1px solid var(--cyan);
  border-radius: 12px 12px 3px 12px;
  background: linear-gradient(135deg, #7ff8ff, var(--cyan));
  box-shadow: 0 0 28px rgba(32, 220, 229, 0.18);
  font-family: "Oxanium", sans-serif;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  align-items: center;
}

.system-document-card .notice {
  padding: 18px 20px;
  color: var(--ink) !important;
  border: 1px solid color-mix(in srgb, var(--pink) 50%, var(--line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--pink) 8%, transparent);
}

.support-shell {
  width: min(1180px, 92vw);
  margin: 0 auto;
  padding: clamp(38px, 7vw, 92px) 0;
}

.support-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.76fr);
  gap: clamp(34px, 7vw, 90px);
  padding: clamp(34px, 6vw, 78px);
  align-items: center;
}

.support-hero > *,
.support-info-grid > * {
  position: relative;
  z-index: 2;
}

.support-page .section-eyebrow,
.support-page .document-intro {
  color: var(--violet);
}

.support-page .section-eyebrow > span {
  background: var(--violet);
  box-shadow: 0 0 12px color-mix(in srgb, var(--violet) 72%, transparent);
}

.support-copy h1 {
  max-width: 660px;
  margin: 22px 0 18px;
  font-size: clamp(3rem, 7vw, 6.7rem);
}

.support-copy h1 em { color: var(--violet); }

.support-copy .document-intro {
  margin: 0 0 18px;
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  font-weight: 700;
}

.support-copy > p:last-child {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.7;
}

.support-channel {
  padding: 26px;
  border: 1px solid color-mix(in srgb, var(--violet) 38%, var(--line));
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0, color-mix(in srgb, var(--violet) 18%, transparent), transparent 52%),
    color-mix(in srgb, var(--panel-strong) 88%, transparent);
  box-shadow: 0 18px 50px color-mix(in srgb, var(--violet) 15%, transparent);
}

.support-channel-label,
.support-response {
  margin: 0;
  color: var(--muted);
  font-family: "Oxanium", sans-serif;
  font-size: 0.67rem;
  letter-spacing: 0.14em;
}

.email-copy-card {
  display: grid;
  gap: 17px;
  padding: 22px;
  margin: 18px 0 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: color-mix(in srgb, var(--night) 56%, transparent);
}

.email-copy-card small {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.email-copy-card a {
  color: var(--ink);
  font-family: "Oxanium", sans-serif;
  font-size: clamp(0.86rem, 1.4vw, 1rem);
  text-decoration: none;
}

.copy-email-button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 18px;
  color: #06122c;
  border: 1px solid var(--cyan);
  border-radius: 12px;
  background: linear-gradient(135deg, #7ff8ff, var(--cyan));
  box-shadow: 0 12px 26px color-mix(in srgb, var(--cyan) 28%, transparent);
  font-family: "Oxanium", sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.copy-email-button::before {
  margin-right: 9px;
  content: "◇";
  font-size: 1rem;
}

.support-mail-link {
  display: inline-flex;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  align-items: center;
}

.support-mail-link:hover { color: var(--violet); }

.support-info-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
  margin-top: 18px;
}

.support-info-card {
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 25px;
  background: color-mix(in srgb, var(--panel) 82%, transparent);
}

.support-info-card h2 {
  margin: 0 0 18px;
  font-family: "Oxanium", sans-serif;
  font-size: clamp(1.25rem, 2.3vw, 1.75rem);
}

.support-info-card ul {
  display: grid;
  gap: 13px;
  padding: 0;
  margin: 0;
  color: var(--muted);
  list-style: none;
}

.support-info-card li {
  display: grid;
  grid-template-columns: 25px 1fr;
  gap: 10px;
  line-height: 1.55;
}

.support-info-card li::before {
  display: grid;
  width: 21px;
  height: 21px;
  color: var(--violet);
  border: 1px solid currentColor;
  clip-path: polygon(24% 3%, 76% 3%, 97% 24%, 97% 76%, 76% 97%, 24% 97%, 3% 76%, 3% 24%);
  content: "·";
  place-items: center;
}

.support-privacy-card {
  display: flex;
  flex-direction: column;
}

.support-privacy-card > p {
  color: var(--muted);
  line-height: 1.65;
}

.support-privacy-card .system-button {
  width: fit-content;
  margin-top: auto;
  color: var(--ink);
  border-color: color-mix(in srgb, var(--violet) 55%, var(--line));
}

.support-notice {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 15px;
  margin-top: 18px;
  padding: 20px 24px;
  color: var(--muted);
  border: 1px solid color-mix(in srgb, var(--pink) 34%, var(--line));
  border-radius: 18px;
  background: color-mix(in srgb, var(--pink) 6%, var(--panel));
  align-items: center;
}

.support-notice strong {
  color: var(--pink-text);
  font-family: "Oxanium", sans-serif;
  font-size: 0.69rem;
  letter-spacing: 0.1em;
}

.support-notice p { margin: 0; line-height: 1.55; }

.support-response {
  margin-top: 32px;
  color: color-mix(in srgb, var(--violet) 78%, var(--muted));
  text-align: center;
}

@media (max-width: 820px) {
  .support-hero,
  .support-info-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .support-shell { width: min(100% - 24px, 1180px); }
  .support-hero { padding: 28px 20px; }
  .support-channel { padding: 18px; }
  .email-copy-card { padding: 17px; }
  .support-notice { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .system-document-shell { width: min(100% - 24px, 1000px); }
  .system-document-card { padding: 28px 20px; }
  .privacy-toc nav { grid-template-columns: 1fr; }
}