/* P4 (Material Archives): LP 物語・検索ドロワー・タグ4軸。motion.css のあとに読む。契約は spec/p4.md */

/* --- 物語: sticky の背景スタックと全幅チャプター --- */
.lp-story { position: relative; background: #14110d; }

.lp-bgs {
  position: sticky;
  top: 0;
  height: 100svh;
  margin-bottom: -100svh;
  overflow: hidden;
}
.lp-bgs img { position: absolute; inset: 0; opacity: 0; }
.lp-bgs img:first-child { opacity: 1; }
html[data-motion="on"] .lp-bgs img {
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 1.1s ease, transform 2.6s cubic-bezier(.22,.61,.21,1);
}
html[data-motion="on"] .lp-bgs img.is-on { opacity: 1; transform: scale(1); }
.lp-bgs::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(14,11,8,.66) 0%, rgba(14,11,8,.34) 48%, rgba(14,11,8,.12) 100%);
}

.lp-ch {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  align-items: center;
  color: #fff;
}
.lp-ch-in {
  width: min(var(--max), calc(100% - var(--pad) * 2));
  margin: 0 auto;
  padding: 96px 0;
}
.lp-ch-in > * { max-width: 560px; }
html[data-motion="on"] .lp-ch-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .8s ease, transform .8s cubic-bezier(.22,.61,.21,1);
}
html[data-motion="on"] .lp-ch.is-live .lp-ch-in { opacity: 1; transform: none; }

.lp-story.is-instant .lp-bgs img,
.lp-story.is-instant .lp-ch-in { transition: none; }

.lp-kicker { font-size: var(--fs-small); letter-spacing: .18em; color: rgba(255,255,255,.78); margin-bottom: 20px; }
.lp-brand {
  font-family: var(--font-h);
  font-weight: var(--fw-h);
  font-size: calc(var(--fs-h1) * 1.6);
  letter-spacing: .1em;
  line-height: 1.3;
  text-shadow: 0 1px 12px rgba(0,0,0,.4);
  margin-bottom: 28px;
}
.lp-title {
  font-size: calc(var(--fs-h1) * 1.1);
  letter-spacing: .1em;
  line-height: 1.4;
  margin-bottom: 28px;
  text-shadow: 0 1px 12px rgba(0,0,0,.4);
}
.lp-lead { line-height: 2.1; margin-bottom: 1.4em; text-shadow: 0 1px 8px rgba(0,0,0,.45); }
.lp-prompt {
  margin-top: 2.2em;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,.4);
  font-size: .9375rem;
  color: rgba(255,255,255,.92);
}

.lp-cue {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  font-size: .6875rem;
  letter-spacing: .3em;
  color: rgba(255,255,255,.85);
  text-align: center;
}
.lp-cue::after {
  content: "";
  display: block;
  width: 1px;
  height: 44px;
  background: rgba(255,255,255,.6);
  margin: 10px auto 0;
}

.lp-fields { display: flex; flex-wrap: wrap; gap: 28px 36px; margin-top: 40px; max-width: none; }
.lp-fields a { display: grid; gap: 6px; color: #fff; }
.lp-field-kanji { font-family: var(--font-h); font-size: calc(var(--fs-h1) * 1.4); line-height: 1; }
.lp-field-en { font-size: .6875rem; letter-spacing: .18em; color: rgba(255,255,255,.75); }

.lp-actions { display: flex; flex-wrap: wrap; gap: 14px 28px; margin-top: 48px; align-items: center; max-width: none; }
.lp-textlink { color: #fff; border-bottom: 1px solid rgba(255,255,255,.6); padding-bottom: 3px; font-size: .875rem; }
.lp-openbtn {
  border: 1px solid rgba(255,255,255,.85);
  background: transparent;
  color: #fff;
  padding: 12px 22px;
  cursor: pointer;
  font-size: .875rem;
  letter-spacing: .1em;
}

@media (hover: hover) and (pointer: fine) {
  .lp-fields a, .lp-textlink, .lp-openbtn { transition: opacity .5s ease; }
  .lp-fields a:hover, .lp-textlink:hover, .lp-openbtn:hover { opacity: .68; }
}

/* --- 右端タブ（事例 / 素材の2連）とドロワー --- */
.lp-tab {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 35;
  display: flex;
  flex-direction: column;
}
.lp-tab-btn {
  writing-mode: vertical-rl;
  letter-spacing: .14em;
  width: 52px;
  min-height: 88px;
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  cursor: pointer;
  background: var(--ink);
  color: var(--bg);
  font-size: .875rem;
}
.lp-tab-btn + .lp-tab-btn { border-top: 1px solid rgba(246,241,231,.28); }
@media (hover: hover) and (pointer: fine) {
  .lp-tab-btn { transition: background .3s ease; }
  .lp-tab-btn:hover { background: #000; }
}

.lp-scrim {
  position: fixed;
  inset: 0;
  z-index: 34;
  background: rgba(20,16,11,.42);
  opacity: 0;
  pointer-events: none;
  transition: opacity .45s ease;
}
.lp-scrim.is-open { opacity: 1; pointer-events: auto; }

.lp-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 36;
  width: 0;
  overflow: hidden;
  visibility: hidden;
  transition: width .55s cubic-bezier(.22,.61,.21,1), visibility 0s .55s;
}
.lp-drawer.is-open {
  width: min(880px, 72vw);
  visibility: visible;
  transition: width .55s cubic-bezier(.22,.61,.21,1);
}
.lp-drawer-in {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(880px, 72vw);
  overflow-y: auto;
  background: var(--bg);
  border-left: 1px solid var(--line);
  padding: 44px 56px 64px;
}

.lp-drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.lp-drawer-title { font-family: var(--font-h); font-weight: var(--fw-h); font-size: calc(var(--fs-h2) * .92); letter-spacing: .12em; }
.lp-close {
  border: 0;
  background: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--muted);
  width: 44px;
  height: 44px;
  margin: -8px -8px 0 0;
}
.lp-close:hover { color: var(--ink); }

/* モードのトグル（セグメント。ピルにしない） */
.lp-switch {
  margin-top: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--ink);
}
.lp-switch-btn {
  min-height: 48px;
  border: 0;
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  font-size: .875rem;
  letter-spacing: .12em;
  transition: background .3s ease, color .3s ease;
}
.lp-switch-btn + .lp-switch-btn { border-left: 1px solid var(--ink); }
.lp-switch-btn.is-on { background: var(--ink); color: var(--bg); }

.lp-count { margin-top: 12px; color: var(--muted); font-size: .8125rem; letter-spacing: .08em; }

/* 軸: 索引の組版（太い上罫＋hairline＋明朝の軸見出し） */
.lp-axes { margin-top: 20px; border-top: 1px solid var(--ink); }
.lp-drawer .lp-axis {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 6px 28px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.lp-drawer .lp-axis-label {
  font-family: var(--font-h);
  font-weight: var(--fw-h);
  font-size: .9375rem;
  letter-spacing: .12em;
  color: var(--ink);
  padding-top: 11px;
}

.lp-drawer-foot { margin-top: 28px; }
.lp-goto {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  padding: 14px;
  cursor: pointer;
  letter-spacing: .12em;
  font-size: .875rem;
}

/* --- タグ群（ドロワーと結果ページ共通） --- */
.lp-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.lp-tag {
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  padding: 12px 18px;
  min-height: 44px;
  cursor: pointer;
  font-size: .875rem;
  letter-spacing: .08em;
  transition: background .3s ease, color .3s ease, border-color .3s ease;
}
@media (hover: hover) and (pointer: fine) {
  .lp-tag:hover { border-color: var(--ink); }
}
.lp-tag.is-on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.lp-tag--tone {
  font-family: var(--font-h);
  font-size: 1rem;
  min-width: 48px;
  padding: 12px 14px;
  text-align: center;
}

.lp-sel { margin-top: 28px; border-top: 1px solid var(--line); padding-top: 20px; }
.lp-sel-label { font-size: var(--fs-small); color: var(--muted); letter-spacing: .12em; margin-bottom: 10px; }
.lp-sel .lp-tag::after { content: "×"; margin-left: 8px; }
.lp-clearall {
  border: 0;
  background: none;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  cursor: pointer;
  padding: 4px 0;
  margin-top: 14px;
  font-size: .8125rem;
  letter-spacing: .08em;
}
.lp-clearall:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* --- 結果ページのインラインタグ行 --- */
.lp-tagbar { margin-top: 36px; border-top: 1px solid var(--line); padding-top: 8px; }
.lp-tagbar .lp-axis { display: grid; grid-template-columns: 96px 1fr; gap: 8px 20px; margin-top: 16px; align-items: start; }
.lp-tagbar .lp-axis-label { font-size: var(--fs-small); letter-spacing: .12em; color: var(--muted); padding-top: 9px; }

@media (max-width: 900px) {
  .lp-brand { font-size: calc(var(--fs-h1) * 1.1); }
  .lp-title { font-size: calc(var(--fs-h1) * .94); }
  .lp-ch-in { padding: 72px 0; }
  .lp-drawer {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 0;
    transition: height .55s cubic-bezier(.22,.61,.21,1), visibility 0s .55s;
  }
  .lp-drawer.is-open { width: 100%; height: 78vh; height: 78dvh; transition: height .55s cubic-bezier(.22,.61,.21,1); }
  .lp-drawer-in {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 78vh;
    height: 78dvh;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 20px 20px 44px;
  }
  .lp-drawer .lp-axis { grid-template-columns: 1fr; gap: 10px; padding: 18px 0; }
  .lp-drawer .lp-axis-label { padding-top: 0; }
  .lp-tagbar .lp-axis { grid-template-columns: 1fr; }
  .lp-tagbar .lp-axis-label { padding-top: 0; }
}