/* ============================================================
   UNKNOWN WAR — 共通スタイル
   端末（ターミナル）風UI。全ページで読み込む。
   ============================================================ */

:root {
  --bg:        #04070a;
  --bg-panel:  #0a1119;
  --bg-raise:  #0f1a24;
  --line:      #1d3040;
  --line-soft: #142430;

  --fg:        #cfe6e2;
  --fg-dim:    #6f8a92;
  --fg-faint:  #3d545e;

  --accent:      #4fe3c1;  /* 味方（＝と思い込んでいる側）の色 */
  --accent-2:    #35c8ff;
  --amber:       #ffb347;
  --danger:      #ff4d5e;

  --glow: 0 0 12px rgba(79, 227, 193, .35);

  --font-mono: "SFMono-Regular", "Consolas", "Cascadia Mono", "Liberation Mono", monospace;
  --font-jp: "BIZ UDGothic", "Yu Gothic", "Meiryo", "Hiragino Kaku Gothic ProN", sans-serif;
  --font: var(--font-mono), var(--font-jp);

  --max: 1080px;
}

/* エンディング以降は世界の色が変わる */
body.hostile {
  --accent:   #ff4d5e;
  --accent-2: #ff8a3d;
  --glow: 0 0 14px rgba(255, 77, 94, .4);
}

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

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono), var(--font-jp);
  font-size: 15px;
  line-height: 1.85;
  letter-spacing: .04em;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

/* ---------- 背景演出（走査線・グリッド・ノイズ） ---------- */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9000;
}

/* 走査線 */
body::before {
  background: repeating-linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0px,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, .28) 3px,
    rgba(0, 0, 0, .28) 4px
  );
  opacity: .5;
}

/* 周辺減光 */
body::after {
  background: radial-gradient(ellipse at center, rgba(0,0,0,0) 45%, rgba(0,0,0,.65) 100%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(79,227,193,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(79,227,193,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 0%, transparent 78%);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

/* ---------- 共通レイアウト ---------- */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px 96px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: linear-gradient(to bottom, rgba(4,7,10,.97), rgba(4,7,10,.86));
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  white-space: nowrap;
}
.brand__mark {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--accent);
  text-shadow: var(--glow);
}
.brand__sub {
  font-size: .66rem;
  color: var(--fg-faint);
  letter-spacing: .18em;
}

.site-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-left: auto;
}
.site-nav a {
  color: var(--fg-dim);
  text-decoration: none;
  font-size: .76rem;
  letter-spacing: .12em;
  padding: 5px 10px;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color .18s, border-color .18s, background .18s;
}
.site-nav a:hover { color: var(--accent); border-color: var(--line); }
.site-nav a[aria-current="page"] {
  color: var(--accent);
  border-color: var(--line);
  background: rgba(79,227,193,.06);
}
.site-nav a.is-locked {
  color: var(--fg-faint);
  cursor: not-allowed;
  text-decoration: line-through;
  opacity: .6;
}

/* ---------- 見出し ---------- */
.page-head {
  padding: 44px 0 26px;
  border-bottom: 1px dashed var(--line);
  margin-bottom: 32px;
}
.page-head__eyebrow {
  font-size: .7rem;
  letter-spacing: .3em;
  color: var(--accent);
  margin: 0 0 10px;
}
.page-head h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  letter-spacing: .14em;
  font-weight: 700;
}
.page-head__lead {
  margin: 14px 0 0;
  color: var(--fg-dim);
  font-size: .88rem;
  max-width: 70ch;
}

h2 {
  font-size: 1.06rem;
  letter-spacing: .16em;
  margin: 44px 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
  color: var(--fg);
}
h3 {
  font-size: .92rem;
  letter-spacing: .12em;
  margin: 28px 0 10px;
  color: var(--accent-2);
}

p { margin: 0 0 1em; }
a { color: var(--accent-2); }

.dim   { color: var(--fg-dim); }
.faint { color: var(--fg-faint); }
.amber { color: var(--amber); }
.danger{ color: var(--danger); }
.mono  { font-family: var(--font-mono); }
.center{ text-align: center; }

/* ---------- パネル ---------- */
.panel {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 22px 24px;
  margin: 0 0 20px;
}
.panel--raise { background: var(--bg-raise); }
.panel__label {
  position: absolute;
  top: -9px;
  left: 16px;
  background: var(--bg);
  padding: 0 8px;
  font-size: .66rem;
  letter-spacing: .24em;
  color: var(--accent);
}
.panel > :last-child { margin-bottom: 0; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

/* ---------- 端末表示 ---------- */
.terminal {
  background: #030507;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 20px 22px;
  font-size: .88rem;
  line-height: 2;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 3em;
}
.terminal .prompt { color: var(--accent); }
.terminal .warn   { color: var(--amber); }
.terminal .err    { color: var(--danger); }

.caret::after {
  content: "▌";
  color: var(--accent);
  animation: blink 1.05s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- タイトル（トップページ） ---------- */
.hero {
  min-height: calc(100vh - 52px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 6px;
  padding: 60px 20px;
}
.hero__eyebrow {
  font-size: .72rem;
  letter-spacing: .5em;
  color: var(--fg-faint);
  margin: 0 0 18px;
}
.hero__title {
  margin: 0;
  font-size: clamp(2.4rem, 11vw, 6.2rem);
  font-weight: 700;
  letter-spacing: .1em;
  line-height: 1.05;
  color: var(--fg);
  position: relative;
  text-shadow:
    0 0 22px rgba(79,227,193,.28),
    0 0 60px rgba(53,200,255,.14);
}
.hero__title span { display: block; }
.hero__title .t2 { color: var(--accent); }

.glitch { position: relative; }
.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.glitch::before {
  color: var(--danger);
  transform: translate(-2px, 0);
  clip-path: inset(0 0 62% 0);
  animation: glitch-a 4.2s infinite steps(2, end);
  opacity: .55;
}
.glitch::after {
  color: var(--accent-2);
  transform: translate(2px, 0);
  clip-path: inset(58% 0 0 0);
  animation: glitch-b 3.4s infinite steps(2, end);
  opacity: .5;
}
@keyframes glitch-a {
  0%, 92%, 100% { transform: translate(-2px, 0); opacity: 0; }
  93% { transform: translate(-6px, -2px); opacity: .7; }
  96% { transform: translate(4px, 1px);  opacity: .5; }
}
@keyframes glitch-b {
  0%, 90%, 100% { transform: translate(2px, 0); opacity: 0; }
  91% { transform: translate(6px, 2px);  opacity: .65; }
  95% { transform: translate(-3px, -1px); opacity: .45; }
}

.hero__sub {
  margin: 22px 0 0;
  color: var(--fg-dim);
  font-size: .92rem;
  letter-spacing: .18em;
}
.hero__meta {
  margin-top: 40px;
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  justify-content: center;
  font-size: .72rem;
  color: var(--fg-faint);
  letter-spacing: .16em;
}
.hero__actions {
  margin-top: 44px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: inherit;
  font-size: .84rem;
  letter-spacing: .16em;
  color: var(--accent);
  background: rgba(79,227,193,.05);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 12px 26px;
  cursor: pointer;
  text-decoration: none;
  transition: background .18s, color .18s, box-shadow .18s, transform .05s;
}
.btn:hover {
  background: var(--accent);
  color: #04070a;
  box-shadow: var(--glow);
}
.btn:active { transform: translateY(1px); }
.btn--ghost {
  color: var(--fg-dim);
  border-color: var(--line);
  background: transparent;
}
.btn--ghost:hover {
  color: var(--fg);
  background: rgba(255,255,255,.04);
  border-color: var(--fg-dim);
  box-shadow: none;
}
.btn--danger { color: var(--danger); border-color: var(--danger); background: rgba(255,77,94,.05); }
.btn--danger:hover { background: var(--danger); color: #04070a; box-shadow: 0 0 12px rgba(255,77,94,.4); }
.btn[disabled], .btn.is-disabled {
  opacity: .35;
  pointer-events: none;
}
.btn--sm { padding: 7px 14px; font-size: .74rem; }

/* ---------- 進行状況バー ---------- */
.progress {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0 0 28px;
  font-size: .72rem;
  letter-spacing: .14em;
}
.progress__node {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--fg-faint);
  text-decoration: none;
}
.progress__node.is-done    { color: var(--accent); border-color: rgba(79,227,193,.5); }
.progress__node.is-current { color: #04070a; background: var(--accent); border-color: var(--accent); box-shadow: var(--glow); }
.progress__sep { color: var(--fg-faint); }

/* ---------- 資料 ---------- */
.doc {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--bg-panel);
  margin: 0 0 16px;
  overflow: hidden;
}
.doc__head {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: .84rem;
  letter-spacing: .1em;
  color: var(--fg);
  background: var(--bg-raise);
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  padding: 13px 18px;
  cursor: pointer;
}
.doc__head:hover { color: var(--accent); }
.doc__id {
  font-size: .68rem;
  color: var(--accent);
  border: 1px solid var(--line);
  padding: 2px 8px;
  border-radius: 2px;
  flex: none;
}
.doc__toggle { margin-left: auto; color: var(--fg-faint); font-size: .8rem; }
.doc__body { padding: 20px 22px; display: none; }
.doc.is-open .doc__body { display: block; }
.doc.is-open .doc__toggle { color: var(--accent); }

.doc__text {
  white-space: pre-wrap;
  font-size: .84rem;
  line-height: 2.05;
  color: var(--fg);
  margin: 0;
}
.doc__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: .76rem;
  color: var(--fg-faint);
}

/* 区画配置図（4×4） */
.sector-map {
  display: grid;
  grid-template-columns: auto repeat(4, minmax(52px, 1fr));
  gap: 4px;
  margin: 8px 0 4px;
  max-width: 420px;
  font-size: .8rem;
}
.sector-map__corner,
.sector-map__h,
.sector-map__v {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-faint);
  font-size: .7rem;
  padding: 4px;
}
.sector-map__cell {
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.sector-map__no { font-size: .6rem; color: var(--accent); letter-spacing: .08em; }
.sector-map__kana { font-size: 1.05rem; color: var(--fg); }

/* ---------- 小謎 ---------- */
.riddles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}
.riddle {
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 18px 20px 20px;
}
.riddle.is-solved { border-color: rgba(79,227,193,.45); background: rgba(79,227,193,.04); }
.riddle__no {
  font-size: .68rem;
  letter-spacing: .22em;
  color: var(--accent);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.riddle__no .tick { color: var(--accent); }
.riddle__body {
  white-space: pre-wrap;
  font-size: .84rem;
  line-height: 2;
  margin: 0 0 16px;
  flex: 1;
}
.riddle__form { display: flex; gap: 8px; flex-wrap: wrap; }

input[type="text"] {
  flex: 1;
  min-width: 140px;
  font: inherit;
  font-size: .88rem;
  letter-spacing: .12em;
  color: var(--fg);
  background: #030507;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 10px 12px;
  outline: none;
}
input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(79,227,193,.25);
}
input[type="text"]::placeholder { color: var(--fg-faint); letter-spacing: .1em; }

.riddle__msg { font-size: .74rem; margin: 10px 0 0; min-height: 1.4em; }
.riddle__msg.ok  { color: var(--accent); }
.riddle__msg.ng  { color: var(--danger); }
.riddle__hint {
  margin: 12px 0 0;
  font-size: .74rem;
  color: var(--fg-faint);
}
.riddle__hint summary { cursor: pointer; color: var(--fg-dim); }
.riddle__hint summary:hover { color: var(--amber); }
.riddle__hint p { margin: 8px 0 0; color: var(--amber); }

/* ---------- 断片トレイ / 組み立て ---------- */
.tray {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  max-width: 520px;
}
.frag {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--fg-dim);
  font: inherit;
  cursor: pointer;
  padding: 6px;
  transition: border-color .16s, color .16s, background .16s, transform .08s;
}
.frag:hover:not([disabled]) { border-color: var(--accent); color: var(--accent); }
.frag[disabled] { opacity: .28; cursor: default; }
.frag.is-picked { border-color: var(--accent); background: rgba(79,227,193,.1); color: var(--accent); }
.frag__icon { width: 42%; height: auto; }
.frag__name { font-size: .64rem; letter-spacing: .1em; }
.frag__no {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: .56rem;
  color: var(--fg-faint);
  letter-spacing: .06em;
}

.assembly {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  width: 100%;
  max-width: 300px;
  border: 1px solid var(--line);
  background: #030507;
  padding: 10px;
}
.slot {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #05080b;
  border: 1px dashed var(--line-soft);
  color: var(--fg-faint);
  font-size: .68rem;
  cursor: pointer;
  overflow: hidden;
}
.slot.is-filled { border-style: solid; border-color: transparent; background: #fff; }
.slot img { width: 100%; height: 100%; object-fit: cover; display: block; }
.slot__pos {
  position: absolute;
  top: 3px;
  left: 5px;
  font-size: .56rem;
  color: var(--fg-faint);
  z-index: 2;
}
.slot.is-filled .slot__pos { color: rgba(0,0,0,.45); }

.assembly.is-scanning { animation: scanpulse .9s ease-in-out infinite; }
@keyframes scanpulse {
  0%,100% { box-shadow: 0 0 0 rgba(79,227,193,0); }
  50%     { box-shadow: 0 0 26px rgba(79,227,193,.5); }
}

.assembly-row {
  display: grid;
  grid-template-columns: minmax(240px, 320px) 1fr;
  gap: 26px;
  align-items: start;
}
@media (max-width: 700px) {
  .assembly-row { grid-template-columns: 1fr; }
}

/* ---------- 結果表示 ---------- */
.readout {
  border: 1px solid var(--accent);
  background: rgba(79,227,193,.05);
  border-radius: 3px;
  padding: 18px 20px;
  margin: 20px 0 0;
}
.readout__label {
  font-size: .66rem;
  letter-spacing: .24em;
  color: var(--accent);
  margin: 0 0 10px;
}
.readout__text { margin: 0; font-size: .86rem; line-height: 2; white-space: pre-wrap; }

.locked-note {
  border: 1px dashed var(--line);
  border-radius: 3px;
  padding: 26px 24px;
  text-align: center;
  color: var(--fg-dim);
  font-size: .84rem;
}

/* ---------- 遊び方の手順 ---------- */
.steps-list { counter-reset: st; list-style: none; padding: 0; margin: 0; }
.steps-list li {
  counter-increment: st;
  position: relative;
  padding: 0 0 0 52px;
  margin: 0 0 22px;
  font-size: .88rem;
}
.steps-list li::before {
  content: counter(st, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--accent);
  border-radius: 2px;
  color: var(--accent);
  font-size: .76rem;
}
.steps-list h3 { margin: 0 0 4px; }

/* ---------- テーブル ---------- */
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: .8rem;
  margin: 0 0 4px;
}
table.data th, table.data td {
  border: 1px solid var(--line);
  padding: 7px 10px;
  text-align: left;
}
table.data th { background: var(--bg-raise); color: var(--accent); font-weight: 400; letter-spacing: .1em; }

/* ---------- フッター ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 60px;
  padding: 24px 20px 40px;
  text-align: center;
  color: var(--fg-faint);
  font-size: .7rem;
  letter-spacing: .16em;
}
.site-footer a { color: var(--fg-dim); }

/* ---------- エンディング ---------- */
.ending-stage {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
}
.ending-line {
  max-width: 44ch;
  margin: 0 auto 1.4em;
  font-size: clamp(.92rem, 2.6vw, 1.12rem);
  line-height: 2.2;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 1.1s ease, transform 1.1s ease;
}
.ending-line.is-in { opacity: 1; transform: none; }
.ending-line.is-big {
  font-size: clamp(1.3rem, 5vw, 2.1rem);
  letter-spacing: .18em;
  color: var(--accent);
  text-shadow: var(--glow);
  margin: 1.6em auto;
}
.ending-line.is-alert {
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 14px 22px;
  letter-spacing: .2em;
}

.flash { animation: flashwhite .5s ease-out; }
@keyframes flashwhite {
  0%   { background: #fff; }
  100% { background: transparent; }
}

/* ---------- 印刷用 ---------- */
.print-sheet { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.print-card {
  border: 1px solid var(--line);
  background: var(--bg-panel);
  padding: 10px;
  text-align: center;
}
.print-card img { width: 100%; display: block; background: #fff; }
.print-card figcaption { font-size: .68rem; color: var(--fg-dim); margin-top: 6px; }

@media print {
  body { background: #fff; color: #000; }
  body::before, body::after, .bg-grid, .site-header, .site-footer, .no-print { display: none !important; }
  .print-card { border: 1px solid #000; background: #fff; }
  .print-card figcaption { color: #000; }
  .wrap { max-width: none; padding: 0; }
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 640px) {
  body { font-size: 14px; }
  .wrap { padding: 0 14px 72px; }
  .site-header__inner { padding: 8px 14px; gap: 10px; }
  .site-nav { width: 100%; margin-left: 0; }
  .tray { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .frag__name { font-size: .56rem; }
  .panel { padding: 18px 16px; }
}