/* =========================================================
   OKTAVIA CGI GAMES - BASE CSS
   ---------------------------------------------------------
   - 共通レイアウト
   - 共通コンポーネント
   - テーマ非依存の骨格
   ========================================================= */

/* =========================
   1) Common tokens
   ========================= */
:root {
  /* fonts */
  --font-body: "MS PGothic", "MS Gothic", "Meiryo", "Hiragino Kaku Gothic ProN",
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "MS Gothic", monospace;
  --font-title: var(--font-mono);

  /* base */
  --bg: #241915;
  --text: #f4ecd8;

  /* panel */
  --panel-bg-top: rgba(54, 38, 29, 0.92);
  --panel-bg-bottom: rgba(34, 24, 19, 0.92);
  --panel-border: rgba(255, 209, 117, 0.30);
  --panel-shadow-outer: rgba(0, 0, 0, 0.40);
  --panel-inner-line: rgba(255, 255, 255, 0.05);

  /* panel glow */
  --panel-glow-1: rgba(255, 220, 140, 0.12);
  --panel-glow-2: rgba(255, 220, 140, 0.08);
  --panel-glow-3: rgba(255, 220, 140, 0.07);

  /* titles */
  --title-color: rgba(255, 235, 200, 0.95);

  /* cards / menu */
  --card-border: rgba(255, 209, 117, 0.24);
  --card-bg: rgba(0, 0, 0, 0.14);
  --card-bg-hover: rgba(0, 0, 0, 0.22);

  /* accents */
  --accent: rgba(255, 209, 117, 0.62);
  --accent-strong: rgba(255, 209, 117, 0.46);
  --accent-soft: rgba(255, 209, 117, 0.15);

  /* menu text */
  --menu-label: #ffe9bd;
  --menu-desc: rgba(244, 236, 216, 0.88);
  --menu-textshadow: rgba(255, 209, 117, 0.08);

  /* pill */
  --pill-border: rgba(255, 209, 117, 0.28);
  --pill-bg: rgba(0, 0, 0, 0.18);
  --pill-text: rgba(255, 235, 200, 0.95);

  /* notice */
  --notice-border: rgba(120, 210, 255, 0.24);
  --notice-bg: rgba(0, 40, 55, 0.16);
  --notice-title: rgba(200, 250, 255, 0.92);
  --notice-body: rgba(245, 255, 255, 0.88);

  /* hero */
  --hero-border: rgba(255, 209, 117, 0.30);
  --hero-bg: rgba(0, 0, 0, 0.12);
  --hero-inner: rgba(255, 255, 255, 0.03);

  /* footer */
  --footer-small: rgba(244, 236, 216, 0.72);
}

/* =========================
   2) Base styles
   ========================= */
* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-body);
  line-height: 1.65;
}

/* 深夜帯に静かな表示　*/
body.late-night {
  filter: brightness(0.96);
}
/* ここまで*/

#page {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 22px auto 56px;
  padding: 0 16px;
}

.mono {
  font-family: var(--font-mono);
}

/* scanline elements exist in HTML, hidden by default */
.scanline,
.scanline2 {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
}

/* =========================
   3) Panels
   ========================= */
.panel {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, var(--panel-bg-top), var(--panel-bg-bottom));
  box-shadow:
    0 12px 30px var(--panel-shadow-outer),
    inset 0 0 0 1px var(--panel-inner-line);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.95;
  background:
    radial-gradient(circle at 18% 22%, var(--panel-glow-1), transparent 35%),
    radial-gradient(circle at 82% 18%, var(--panel-glow-2), transparent 30%),
    radial-gradient(circle at 40% 85%, var(--panel-glow-3), transparent 35%);
}

/* パネル内容を glow より前に出す */
.panel > * {
  position: relative;
  z-index: 2;
}

/* =========================
   4) Titles / labels
   ========================= */
.panel-title {
  position: relative;
  z-index: 2;
  margin: 0 0 12px;
  color: var(--title-color);
  font-family: var(--font-title);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.menu-label {
  color: var(--menu-label);
  font-family: var(--font-title);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-shadow: 0 0 10px var(--menu-textshadow);
}

/* =========================
   5) Header / hero
   ========================= */
#header.panel {
  max-width: 1050px;
  margin: 0 auto 10px;
  padding: 12px;
}

#header {
  padding: 0;
  margin-bottom: 18px;
}

.header-inner {
  display: grid;
  gap: 8px;
}

.hero {
  display: flex;
  justify-content: center;
}

/* 画像未読込でも高さ確保 */
.hero-card {
  position: relative;
  display: grid;
  grid-template-columns: 52px 1fr 52px;
  align-items: center;
  gap: 10px;

  width: min(100%, 980px);
  min-height: clamp(220px, 32vw, 420px);
  padding: 10px;

  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--hero-border);
  background: var(--hero-bg);
  box-shadow: inset 0 0 0 1px var(--hero-inner);

  cursor: default;
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.hero-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 12px var(--accent-soft);
}

.hero-card img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 400px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 10px;
  filter: contrast(1.03) saturate(1.06);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.28);
  animation: heroBreath 8s ease-in-out infinite; /* 画像に微かな呼吸アニメーション */
}

@keyframes heroBreath {
  0%,
  100% {
    filter: contrast(1.03) saturate(1.06) brightness(1);
  }
  50% {
    filter: contrast(1.04) saturate(1.07) brightness(1.03);
  }
}

/* 画像切り替え時のフェード効果 */
#hero-banner {
  opacity: 1;
  transition: opacity 220ms ease;
}

#hero-banner.is-changing {
  opacity: 0.82;
}

/* =========================
   6) Hero navigation
   ========================= */
.hero-nav {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;

  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);

  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
  user-select: none;

  transition:
    transform 120ms ease,
    box-shadow 120ms ease,
    background 120ms ease,
    border-color 120ms ease;
}

.hero-nav:hover {
  transform: scale(1.05);
  border-color: var(--accent);
  box-shadow: 0 0 14px var(--accent-soft);
  background: rgba(0, 0, 0, 0.45);
}

.hero-nav:active {
  transform: scale(0.98);
}

.hero-nav:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
}

/* =========================
   7) Theme switch
   ========================= */
.theme-switch {
  display: flex;
  justify-content: flex-end;
  margin: 0;
}

.theme-btn {
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: rgba(0, 0, 0, 0.18);
  color: var(--text);

  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.10em;
  cursor: pointer;

  transition:
      transform 120ms ease,
      box-shadow 120ms ease,
      border-color 120ms ease,
      background 120ms ease;
}

.theme-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-soft);
}

/* クリックで軽く沈む */
.theme-btn:active {
  transform: translateY(1px) scale(0.99);
}

/* =========================
   8) Layout
   ========================= */
.grid3 {
  display: grid;
  grid-template-columns: 330px 1fr 420px;
  gap: 18px;
  align-items: start;
}

#navigation {
  position: sticky;
  top: 16px;
  padding: 16px;
}

.center-col {
  display: grid;
  gap: 18px;
  align-content: start;
}

#twitter {
  padding: 16px;
}

#twitter .twitter-timeline {
  position: relative;
  z-index: 2;
}

#twitterEmbed {
  min-height: 520px;
}

#twitterEmbed[data-loaded="false"] {
  display: grid;
  place-items: center;
  border-radius: 12px;
  border: 1px dashed var(--card-border);
  background: var(--card-bg);
  padding: 16px;
}

#twitterEmbed[data-loaded="false"] .twitter-timeline {
  color: var(--menu-desc);
  text-decoration: none;
}

/* =========================
   9) Menu cards
   ========================= */
.menu {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 10px;
}

.menu-item {
  position: relative;
  overflow: hidden;
  display: block;
  padding: 12px 12px 10px;
  border-radius: 14px;
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text);
  text-decoration: none;

  transition:
    transform 120ms ease,
    box-shadow 120ms ease,
    border-color 120ms ease,
    background 120ms ease;
}

.menu-item:hover {
  transform: translateY(-2px);
  border-color: var(--accent-strong);
  background: var(--card-bg-hover);
  box-shadow: 0 0 12px var(--accent-soft);
}

.menu-item-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.menu-desc {
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--menu-desc);
}

.pill {
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--pill-border);
  background: var(--pill-bg);
  color: var(--pill-text);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.10em;
}

.menu-item.is-main {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.03) inset;
}

/* =========================
   10) Info / notice
   ========================= */
.panel-message {
  padding: 16px;
}

.panel-message p {
  margin: 10px 0;
}

.site-title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.2;
  color: var(--title-color);
}


.notice {
  margin-top: 14px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--notice-border);
  background: var(--notice-bg);
}

.notice-title {
  margin-bottom: 6px;
  color: var(--notice-title);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.notice-body {
  font-size: 13px;
  color: var(--notice-body);
}

/* =========================
   11) Update panel
   ========================= */
.update-panel {
  padding: 16px;
}

.update-panel .panel-title {
  font-size: 12px;
  opacity: 0.8;
}

.update-row {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 13px;
}

.update-label {
  color: var(--menu-label);
  font-weight: 700;
}

/* =========================
   12) Footer
   ========================= */
.footer {
  margin-top: 18px;
}

.footer .panel {
  padding: 14px 16px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-left {
  text-align: right;
}

.footer-small {
  font-size: 12px;
  color: var(--footer-small);
}

/* =========================
   13) Responsive
   ========================= */
@media (max-width: 1180px) {
  .grid3 {
    grid-template-columns: 330px 1fr;
    grid-template-areas:
      "nav center"
      "tw  tw";
  }

  #navigation {
    grid-area: nav;
    position: static;
  }

  .center-col {
    grid-area: center;
  }

  #twitter {
    grid-area: tw;
  }
}

@media (max-width: 880px) {
  .grid3 {
    grid-template-columns: 1fr;
    grid-template-areas:
      "nav"
      "center"
      "tw";
  }

  #navigation {
    grid-area: nav;
    position: static;
    z-index: 5;
  }

  .center-col {
    grid-area: center;
  }

  #twitter {
    grid-area: tw;
    position: relative;
    z-index: 1;
  }

  #twitter .twitter-timeline {
    display: block;
    width: 100% !important;
  }

  .hero-card {
    grid-template-columns: 44px 1fr 44px;
    gap: 8px;
    min-height: 180px;
    padding: 8px;
  }

  .hero-nav {
    width: 44px;
    height: 44px;
    font-size: 26px;
  }
}

/* =========================
   14) Motion safety
   ========================= */
@media (prefers-reduced-motion: reduce) {
  .menu-item,
  .hero-card,
  .theme-btn,
  .hero-nav {
    transition: none;
  }
}