/*
Theme Name: 新地球の生き方 Gate
Description: スクロールで虚空から門まで降りていく体験型トップページ。全章の背景はWebGLシェーダーによるリアルタイム生成(画像素材なし)。文章はカスタマイザーで編集可能。
Author: WA CIRCLE
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: shin-chikyu-gate
*/

/* ============================================================
   新地球の生き方 — Gate Prototype
   構造: 固定WebGLキャンバス(全景) + スクロール長を作るスペーサ
         + 固定テキストレイヤー(進行度で出入り)
   ============================================================ */
:root{
  --ink:#e9e4d8;
  --ink-dim:rgba(233,228,216,.62);
  --ink-faint:rgba(233,228,216,.34);
  --gold:#e8c98a;
  --teal:#8fd8c4;
  --bg:#04060c;
  --serif:"Shippori Mincho","Yu Mincho","YuMincho","Hiragino Mincho ProN","Noto Serif JP",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:auto}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--serif);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:rgba(232,201,138,.25)}

/* ---- 世界(キャンバス) ---- */
#world{
  position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;
  display:block;z-index:0;
  opacity:0;transition:opacity 2.4s ease;
}
body.awake #world{opacity:1}

/* 粒子(呼吸の塵) — canvas 2D の上層 */
#dust{
  position:fixed;inset:0;width:100vw;height:100vh;height:100dvh;
  z-index:1;pointer-events:none;mix-blend-mode:screen;
  opacity:0;transition:opacity 3s ease .5s;
}
body.awake #dust{opacity:1}

/* ---- スクロール長 ---- */
#journey{height:760vh;position:relative;z-index:2;pointer-events:none}

/* ---- 固定テキストレイヤー ---- */
.layer{
  position:fixed;inset:0;z-index:3;
  display:flex;align-items:center;justify-content:center;
  pointer-events:none;
  opacity:0;visibility:hidden;
}
.layer.on{visibility:visible}
.layer .inner{max-width:min(88vw,900px);text-align:center}

/* --- 序: タイトル --- */
#L0 .inner{display:flex;flex-direction:row-reverse;align-items:center;justify-content:center;gap:clamp(1.5rem,5vw,4.5rem)}
.title-v{
  writing-mode:vertical-rl;
  font-size:clamp(2.6rem,7.2vmin,5.4rem);
  letter-spacing:.42em;
  font-weight:500;
  text-shadow:0 0 40px rgba(232,201,138,.28),0 0 120px rgba(120,160,255,.18);
  white-space:nowrap;
}
.title-v .ch{display:inline-block;opacity:0;transform:translateY(14px);filter:blur(6px);
  transition:opacity 1.4s ease,transform 1.6s cubic-bezier(.2,.7,.2,1),filter 1.6s ease}
body.awake .title-v .ch{opacity:1;transform:none;filter:blur(0)}
.call{
  writing-mode:vertical-rl;
  font-size:clamp(1rem,2.4vmin,1.45rem);
  letter-spacing:.55em;color:var(--ink-dim);white-space:nowrap;
  opacity:0;transition:opacity 2.2s ease 1.6s;
}
body.awake .call{opacity:1}
.whisper{
  position:absolute;bottom:calc(9vh + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);
  font-size:clamp(.68rem,1.5vmin,.85rem);letter-spacing:.4em;color:var(--ink-faint);
  white-space:nowrap;opacity:0;transition:opacity 2s ease 2.6s;
}
body.awake .whisper{opacity:1}
.scroll-cue{
  position:absolute;bottom:calc(3.4vh + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);
  width:1px;height:8vh;overflow:hidden;opacity:0;transition:opacity 2s ease 3.4s;
}
body.awake .scroll-cue{opacity:.7}
.scroll-cue::after{
  content:"";position:absolute;left:0;top:-40%;width:1px;height:40%;
  background:linear-gradient(to bottom,transparent,var(--gold));
  animation:cuefall 2.6s cubic-bezier(.4,0,.2,1) infinite;
}
@keyframes cuefall{0%{top:-40%}70%,100%{top:110%}}

/* --- 中間章の言葉 --- */
.verse{font-size:clamp(1.25rem,3.4vmin,2.15rem);line-height:2.3;letter-spacing:.24em;font-weight:500;
  text-shadow:0 2px 30px rgba(0,0,0,.65)}
.verse em{font-style:normal;color:var(--gold);text-shadow:0 0 26px rgba(232,201,138,.4)}
.verse-note{margin-top:2.4em;font-size:clamp(.72rem,1.6vmin,.9rem);letter-spacing:.34em;color:var(--ink-dim);line-height:2.4}
.chapter-no{
  display:block;margin-bottom:3em;font-size:clamp(.62rem,1.3vmin,.78rem);
  letter-spacing:.6em;color:var(--ink-faint);
}
.chapter-no b{font-weight:400;color:var(--gold);opacity:.85}

/* --- 星: 才能の語 --- */
#constel{position:absolute;inset:0;pointer-events:none}
.tword{
  position:absolute;font-size:clamp(.72rem,1.7vmin,1rem);letter-spacing:.4em;color:var(--ink-dim);
  text-shadow:0 0 18px rgba(143,216,196,.45);white-space:nowrap;
  transform:translate(-50%,-50%);
}
.tword::before{
  content:"";position:absolute;left:50%;top:-1.5em;transform:translateX(-50%);
  width:3px;height:3px;border-radius:50%;background:#dff7ec;
  box-shadow:0 0 10px 2px rgba(143,216,196,.8),0 0 34px 8px rgba(143,216,196,.28);
}
#constelSvg{position:absolute;inset:0;width:100%;height:100%}
#constelSvg line{stroke:rgba(143,216,196,.32);stroke-width:1}

/* --- 門: 最終章 --- */
#L5 .inner{max-width:min(90vw,980px)}
/* 見出しは控えめに。この章の主役は下の「三つの調和」 */
.gate-title{font-size:clamp(1.4rem,3.7vmin,2.35rem);letter-spacing:.3em;margin-bottom:.85em;
  text-shadow:0 0 50px rgba(232,201,138,.3)}
.gate-sub{font-size:clamp(.8rem,1.8vmin,.98rem);letter-spacing:.28em;color:var(--ink-dim);line-height:2.4}
/* 三つの調和: 人・動物・環境。等距離の三角に置き、外へふくらむ弧で結ぶ。
   弧は端を欠いたまま(=調和は完成形ではなく、目指しているもの)。
   三つの色は中心へ向かって混ざり、中心に「和」が灯る。 */
.triad{
  --c-human:#e8c98a;   /* 人 */
  --c-animal:#8fd8c4;  /* 動物 */
  --c-earth:#9db8ea;   /* 環境 */
  position:relative;width:min(70vmin,520px);aspect-ratio:1;
  margin:clamp(.8rem,2.4vh,1.6rem) auto 0;pointer-events:auto;
}
.triad svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.triad .arc{fill:none;stroke-width:.45;stroke-linecap:round;opacity:.9}
.s-human{stop-color:var(--c-human)}
.s-animal{stop-color:var(--c-animal)}
.s-earth{stop-color:var(--c-earth)}

/* 頂点の光点(弧と同じ座標系に置くため SVG 側で描く) */
.triad .tip{stroke:none}
.triad .halo{stroke:none;opacity:.16}
.f-human{fill:var(--c-human)}
.f-animal{fill:var(--c-animal)}
.f-earth{fill:var(--c-earth)}

.triad-node{
  position:absolute;transform:translate(-50%,-50%);text-align:center;white-space:nowrap;
  opacity:0;text-decoration:none;
}
.n-human{color:var(--c-human)}
.n-animal{color:var(--c-animal)}
.n-earth{color:var(--c-earth)}
.tn-k{display:block;font-size:clamp(1.05rem,2.7vmin,1.5rem);letter-spacing:.3em;color:var(--ink);
  text-shadow:0 0 30px rgba(0,0,0,.7)}
.tn-s{display:block;margin-top:.9em;font-size:clamp(.58rem,1.3vmin,.74rem);letter-spacing:.24em;
  color:var(--ink-faint)}
a.triad-node{transition:transform .7s ease}
a.triad-node:hover{transform:translate(-50%,-50%) scale(1.06)}
a.triad-node:hover .tn-s{color:var(--ink-dim)}

/* 中心 — 三つが響きあう場所 */
.triad-core{position:absolute;left:50%;top:55.3%;transform:translate(-50%,-50%);text-align:center;opacity:0}
.triad-core::before{
  content:"";position:absolute;left:50%;top:.4em;width:min(34vmin,190px);height:min(34vmin,190px);
  transform:translate(-50%,-50%);border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(255,238,206,.17),rgba(255,238,206,.05) 45%,transparent 72%);
  animation:coreBreath 7s ease-in-out infinite;
}
.tc-k{position:relative;display:block;font-size:clamp(1.15rem,3vmin,1.7rem);letter-spacing:.22em;
  text-shadow:0 0 30px rgba(232,201,138,.55)}
.tc-s{position:relative;display:block;margin-top:1em;font-size:clamp(.56rem,1.2vmin,.7rem);
  letter-spacing:.3em;color:var(--ink-faint)}
@keyframes coreBreath{
  0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.8}
  50%    {transform:translate(-50%,-50%) scale(1.2);opacity:1}
}

.gate-close{margin-top:clamp(1.8rem,5vh,3rem);font-size:clamp(.66rem,1.5vmin,.82rem);
  letter-spacing:.42em;color:var(--ink-faint);line-height:2.6}

/* 将来の入口(記事/商品/会員など)。URLが設定された分だけ現れる */
.gate-links{
  display:flex;gap:clamp(1.2rem,4vw,2.6rem);justify-content:center;flex-wrap:wrap;
  margin-top:clamp(1.4rem,4vh,2.2rem);pointer-events:auto;
}
.gate-links a{
  color:var(--ink-faint);text-decoration:none;font-size:clamp(.6rem,1.3vmin,.75rem);
  letter-spacing:.3em;padding-bottom:.45em;border-bottom:1px solid rgba(233,228,216,.18);
  transition:color .6s ease,border-color .6s ease;
}
.gate-links a:hover{color:var(--gold);border-color:rgba(232,201,138,.5)}
.gate-links a:focus-visible,a.triad-node:focus-visible{outline:1px solid var(--gold);outline-offset:6px}

/* ---- 常設UI ---- */
#brand{
  position:fixed;top:calc(2.2rem + env(safe-area-inset-top));left:2.4rem;z-index:5;
  writing-mode:vertical-rl;font-size:.78rem;letter-spacing:.5em;color:var(--ink-dim);
  opacity:0;transition:opacity 1.5s ease;pointer-events:none;white-space:nowrap;
}
body.traveling #brand{opacity:1}
#rail{
  position:fixed;right:2.2rem;top:50%;transform:translateY(-50%);z-index:5;
  display:flex;flex-direction:column;align-items:center;gap:1.35rem;
  opacity:0;transition:opacity 1.5s ease;
}
body.awake #rail{opacity:1}
.rail-ch{
  font-size:.72rem;letter-spacing:0;color:var(--ink-faint);cursor:pointer;
  background:none;border:0;font-family:inherit;padding:.2rem;line-height:1;
  transition:color .6s ease,text-shadow .6s ease;
}
.rail-ch.now{color:var(--gold);text-shadow:0 0 14px rgba(232,201,138,.6)}
#rail .bar{width:1px;height:3.2rem;background:rgba(233,228,216,.14);position:relative;overflow:hidden}
#rail .bar i{position:absolute;left:0;top:0;width:1px;height:0;background:linear-gradient(to bottom,var(--gold),rgba(232,201,138,.2))}

/* 帳(とばり): 起動時の黒 */
#veil{position:fixed;inset:0;background:#020308;z-index:9;pointer-events:none;
  transition:opacity 2.2s ease}
body.awake #veil{opacity:0}

.grain{
  position:fixed;inset:-50%;z-index:4;pointer-events:none;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E");
  animation:grain 7s steps(8) infinite;
}
@keyframes grain{
  0%,100%{transform:translate(0,0)}12%{transform:translate(-4%,3%)}25%{transform:translate(3%,-5%)}
  37%{transform:translate(-5%,-2%)}50%{transform:translate(4%,4%)}62%{transform:translate(-3%,5%)}
  75%{transform:translate(5%,-3%)}87%{transform:translate(-2%,-4%)}
}

@media (max-width:720px){
  #brand{left:1.1rem;top:calc(1.2rem + env(safe-area-inset-top))}
  #rail{right:.9rem;gap:1rem}
  #rail .bar{height:2.2rem}
  .layer .inner{max-width:92vw;min-width:0}
  .verse{font-size:1.16rem;letter-spacing:.14em;line-height:2.15}
  .verse-note{font-size:.72rem;letter-spacing:.16em}
  .whisper{font-size:.6rem;letter-spacing:.22em}
  #L0 .inner{gap:1.4rem}
  .title-v{letter-spacing:.3em}
  .gate-title{font-size:1.34rem;letter-spacing:.17em}
  .gate-sub{font-size:.78rem;letter-spacing:.13em}
  .triad{width:82vw;margin-top:1.2rem}
  .tn-k{font-size:1rem;letter-spacing:.18em}
  .tn-s{font-size:.56rem;letter-spacing:.1em;margin-top:.7em}
  .triad-node::before{top:-1.3em;width:3px;height:3px}
  .tc-k{font-size:1.1rem;letter-spacing:.14em}
  .tc-s{font-size:.54rem;letter-spacing:.16em}
  .gate-links a{letter-spacing:.18em}
  .gate-close{letter-spacing:.3em}
  .chapter-no{margin-bottom:2.2em}
  .tword{letter-spacing:.24em;font-size:.68rem}
}
@media (prefers-reduced-motion:reduce){
  .scroll-cue::after,.grain{animation:none}
}
/* 検証モード: すべての出現演出を即時完了 */
body.debug #veil{display:none}
body.debug #world,body.debug #dust{opacity:1;transition:none}
body.debug .title-v .ch{opacity:1;transform:none;filter:none;transition:none}
body.debug .call,body.debug .whisper,body.debug .scroll-cue,body.debug #rail{opacity:1;transition:none}
body.debug .scroll-cue{opacity:.7}

/* 三つの調和の出現(弧の描画・語・中心)は assets/gate.js が進行度に応じて制御する */