/* ================================================================
   朱入れ — PDF手書き修正 試作版
   和文具ミニマリズム: 暗い机の上に紙が浮かび、朱色だけが差し色。
   ================================================================ */

:root {
  --desk:        #28231f;
  --desk-deep:   #1c1815;
  --paper:       #fbf8f1;
  --washi:       #f4ecdd;
  --washi-line:  #ddd2bc;
  --ink:         #221e1a;
  --ink-soft:    #6d6355;
  --vermilion:   #d9381e;
  --vermilion-d: #b32a13;
  --gold:        #c8a24a;

  --serif: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  --sans:  "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", -apple-system, sans-serif;

  --tb-h: 58px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  background: var(--desk);
  font-family: var(--sans);
  color: var(--ink);
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

/* 机の質感: 微細な木目風グレイン */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(120% 90% at 50% 0%, rgba(255,244,220,.05), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}

/* ================= 起動画面 ================= */

#landing {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  background:
    radial-gradient(90% 70% at 50% 30%, rgba(217,56,30,.06), transparent 65%),
    linear-gradient(180deg, var(--desk) 0%, var(--desk-deep) 100%);
  padding: 24px;
}

.landing-inner {
  text-align: center;
  max-width: 560px;
  animation: rise .7s cubic-bezier(.2,.8,.2,1) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

/* 朱印(はんこ)モチーフのロゴ */
.hanko {
  width: 84px; height: 84px;
  margin: 0 auto 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #e8503a, var(--vermilion) 55%, var(--vermilion-d));
  box-shadow: 0 10px 30px rgba(217,56,30,.35), inset 0 0 0 2px rgba(255,255,255,.18);
  display: grid; place-items: center;
  transform: rotate(-4deg);
}
.hanko span {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 600;
  color: var(--paper);
  transform: rotate(4deg);
  letter-spacing: 0;
}

.landing-title {
  font-family: var(--serif);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--washi);
  margin-bottom: 16px;
}
.landing-title em {
  font-style: normal;
  color: #ff6f52;
}

.landing-sub {
  color: #b5a992;
  font-size: 14px;
  line-height: 2;
  letter-spacing: .05em;
  margin-bottom: 36px;
}

#dropzone {
  border: 1.5px dashed #59503f;
  border-radius: 16px;
  padding: 32px 24px 20px;
  transition: border-color .2s, background .2s;
}
#dropzone.dragover {
  border-color: var(--vermilion);
  background: rgba(217,56,30,.07);
}
.drop-hint {
  margin-top: 18px;
  font-size: 12px;
  color: #8a7f68;
  letter-spacing: .06em;
}

.landing-foot {
  margin-top: 28px;
  font-size: 11px;
  color: #6d6350;
  letter-spacing: .08em;
}

/* ================= ボタン共通 ================= */

.btn {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .14em;
  border: none;
  border-radius: 999px;
  padding: 13px 34px;
  cursor: pointer;
  transition: transform .12s, box-shadow .2s, background .2s;
}
.btn:active { transform: scale(.96); }

.btn-vermilion {
  background: linear-gradient(180deg, #e2472c, var(--vermilion) 60%, var(--vermilion-d));
  color: #fff;
  box-shadow: 0 6px 18px rgba(217,56,30,.35);
}
.btn-vermilion:hover { box-shadow: 0 8px 24px rgba(217,56,30,.45); }

.btn-ghost {
  background: transparent;
  color: var(--washi);
  box-shadow: inset 0 0 0 1.5px #59503f;
  margin-left: 12px;
}
.btn-ghost:hover { box-shadow: inset 0 0 0 1.5px var(--gold); color: #e9dfc8; }

/* ================= ツールバー ================= */

#workspace {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
}

#toolbar {
  min-height: var(--tb-h);
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 12px;
  padding-top: env(safe-area-inset-top);
  box-sizing: content-box;
  background: linear-gradient(180deg, #f7f0e2, var(--washi));
  border-bottom: 1px solid var(--washi-line);
  box-shadow: 0 2px 14px rgba(0,0,0,.35);
  z-index: 5;
}

.tb-group { display: flex; align-items: center; gap: 4px; min-width: 0; }
.tb-left  { flex: 1 1 0; }
.tb-right { flex: 1 1 0; justify-content: flex-end; }

.file-name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 26vw;
}

.dot-modified {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--vermilion);
  flex: none;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .35; } }

.tb-btn {
  width: 40px; height: 40px;
  border: none;
  border-radius: 12px;
  background: transparent;
  color: var(--ink);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background .15s, box-shadow .15s, transform .1s;
}
.tb-btn:hover { background: rgba(34,30,26,.07); }
.tb-btn:active { transform: scale(.92); }
.tb-btn:disabled { opacity: .28; pointer-events: none; }
.tb-btn svg { width: 20px; height: 20px; }

/* 選択中ツール: 朱のリング */
.tb-btn.active {
  background: #fff;
  box-shadow: 0 0 0 2px var(--vermilion), 0 2px 8px rgba(0,0,0,.12);
}
#btn-finger[aria-pressed="true"] {
  background: #fff;
  box-shadow: 0 0 0 2px var(--gold), 0 2px 8px rgba(0,0,0,.12);
}

.pen-dot {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--c);
  box-shadow: inset 0 -2px 3px rgba(0,0,0,.25), inset 0 1px 2px rgba(255,255,255,.35);
}

.size-dot { border-radius: 50%; background: var(--ink); }
.size-dot.s1 { width: 4px;  height: 4px; }
.size-dot.s2 { width: 8px;  height: 8px; }
.size-dot.s3 { width: 13px; height: 13px; }

.tb-sep {
  width: 1px; height: 24px;
  background: var(--washi-line);
  margin: 0 6px;
}

.page-indicator {
  font-family: var(--serif);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .08em;
  color: var(--ink-soft);
  min-width: 64px;
  text-align: center;
}

.btn-save {
  padding: 10px 22px;
  font-size: 14px;
  margin-left: 6px;
}

/* ================= ステージ(机) ================= */

#stage {
  flex: 1;
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  touch-action: none;
  background:
    radial-gradient(100% 80% at 50% 20%, rgba(255,240,210,.04), transparent 60%),
    linear-gradient(180deg, var(--desk), var(--desk-deep));
}

/* 紙 */
#page-frame {
  position: relative;
  background: var(--paper);
  border-radius: 2px;
  will-change: transform; /* ピンチズーム中のCSS仮変形を滑らかに */
  box-shadow:
    0 1px 2px rgba(0,0,0,.4),
    0 12px 40px rgba(0,0,0,.55),
    0 30px 80px rgba(0,0,0,.35);
}
#page-frame canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 2px;
}
#cv-pdf  { z-index: 1; }
#cv-ink  { z-index: 2; }
#cv-live { z-index: 3; touch-action: none; }

/* ページめくりアニメーション */
#page-frame.flip-next { animation: flipNext .18s ease-out; }
#page-frame.flip-prev { animation: flipPrev .18s ease-out; }
@keyframes flipNext {
  from { opacity: .25; transform: translateX(26px); }
  to   { opacity: 1;   transform: none; }
}
@keyframes flipPrev {
  from { opacity: .25; transform: translateX(-26px); }
  to   { opacity: 1;   transform: none; }
}

/* カーソル */
#cv-live[data-tool="pen"],
#cv-live[data-tool="marker"] { cursor: crosshair; }
#cv-live[data-tool="eraser"] { cursor: cell; }

/* ================= トースト ================= */

#toast {
  position: fixed;
  left: 50%;
  bottom: calc(28px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 20;
  background: rgba(28,24,21,.92);
  color: var(--washi);
  font-size: 13px;
  letter-spacing: .05em;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid rgba(200,162,74,.35);
  box-shadow: 0 8px 30px rgba(0,0,0,.5);
  animation: toastIn .25s cubic-bezier(.2,.8,.2,1);
  max-width: 86vw;
  text-align: center;
}
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ================= 小さい画面 ================= */

@media (max-width: 740px) {
  .file-name { max-width: 34vw; }
  .tb-sep { margin: 0 2px; }
  .tb-btn { width: 36px; height: 36px; }
  .btn-save { padding: 9px 16px; letter-spacing: .08em; }
}

/* iPhone: ツールバーを2段組みにする(上段=ファイル・ページ・完了 / 下段=ツール) */
@media (max-width: 640px) {
  #toolbar {
    flex-wrap: wrap;
    padding-bottom: 6px;
    row-gap: 2px;
  }
  .tb-left  { order: 1; flex: 1 1 auto; }
  .tb-right { order: 2; flex: 0 1 auto; }
  .tb-tools {
    order: 3;
    flex: 1 1 100%;
    justify-content: center;
    overflow-x: auto;          /* 収まらない場合は横スクロール */
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .tb-tools::-webkit-scrollbar { display: none; }
  .tb-btn { width: 34px; height: 34px; border-radius: 10px; }
  .pen-dot { width: 16px; height: 16px; }
  .page-indicator { min-width: 48px; font-size: 13px; }
  .btn-save { padding: 8px 14px; font-size: 13px; margin-left: 2px; }
  .file-name { display: block; max-width: 30vw; font-size: 12px; }
}