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

:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel2: #273449;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #60a5fa;
  --accent2: #a78bfa;
  --work: #4a4f55;
  --danger: #f87171;
}

[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}

body.no-doc { overflow: auto; }

/* ---------- header ---------- */
#appHeader {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border-bottom: 1px solid var(--line);
  padding: 1.25rem 1.5rem;
  text-align: center;
  flex: none;
}
#appHeader h1 {
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
#appHeader p { color: var(--muted); margin-top: .25rem; font-size: .85rem; }
body.has-doc #appHeader { display: none; }

/* ---------- buttons ---------- */
.btn {
  font: inherit;
  font-size: .85rem;
  color: var(--text);
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: .45rem .8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background .12s, border-color .12s, transform .06s;
}
.btn:hover:not(:disabled) { background: #34455f; border-color: #47617f; }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: .4; cursor: default; }
.btn.icon { padding: .4rem .55rem; font-size: 1rem; line-height: 1; }
.btn.small { padding: .3rem .55rem; font-size: .78rem; }
.btn.big { padding: .7rem 1.4rem; font-size: 1rem; }
.btn.primary {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  border-color: transparent;
  font-weight: 600;
}
.btn.primary:hover:not(:disabled) { filter: brightness(1.12); background: linear-gradient(135deg, #2563eb, #7c3aed); }

/* ---------- toolbar ---------- */
#toolbar {
  flex: none;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  z-index: 30;
}
.tb-row { display: flex; align-items: center; gap: .5rem; padding: .5rem .75rem; flex-wrap: wrap; }
.tb-main { border-bottom: 1px solid var(--line); }
.tb-grow { flex: 1 1 auto; }
.tb-sep { width: 1px; align-self: stretch; background: var(--line); margin: 0 .15rem; }
.tb-file {
  font-size: .8rem; color: var(--muted); max-width: 18ch;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.tools { display: flex; gap: .2rem; background: #16202f; padding: .2rem; border-radius: 10px; }
.tool {
  font: inherit; font-size: .72rem; color: var(--muted);
  background: transparent; border: 0; border-radius: 7px;
  padding: .3rem .5rem; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: .1rem; min-width: 3.1rem;
}
.tool span { font-size: 1.05rem; line-height: 1.1; display: flex; align-items: center; justify-content: center; height: 1.15rem; }
.tool span svg { width: 1.15rem; height: 1.15rem; display: block; }
.tool:hover { background: #22304a; color: var(--text); }
.tool.active { background: linear-gradient(135deg, #2563eb, #7c3aed); color: #fff; }

.zoom { display: flex; align-items: center; gap: .3rem; }
#zoomLabel { font-size: .8rem; color: var(--muted); min-width: 3.4em; text-align: center; }

/* properties bar */
.tb-props { min-height: 2.6rem; background: #16202f; gap: .9rem; }
.prop-group { display: none; align-items: center; gap: .8rem; flex-wrap: wrap; }
.prop-group.show { display: flex; }
.prop-group label { display: flex; align-items: center; gap: .35rem; font-size: .78rem; color: var(--muted); }
.prop-group input[type="number"] { width: 4.2rem; }
.prop-group input, .prop-group select {
  font: inherit; font-size: .8rem; color: var(--text);
  background: var(--panel2); border: 1px solid var(--line);
  border-radius: 6px; padding: .25rem .35rem;
}
.prop-group input[type="color"] { width: 2.2rem; height: 1.7rem; padding: 1px; cursor: pointer; }
.prop-group input[type="range"] { width: 7rem; padding: 0; background: none; border: 0; }
.prop-hint { font-size: .76rem; color: #64748b; margin-left: auto; }
.prop-note { font-size: .74rem; color: #64748b; }
.prop-group .unit { font-size: .72rem; color: #64748b; margin-left: -.15rem; }
#pStampText { width: 5.5rem; }
.item.stamp .hit { pointer-events: all; }

/* ---------- main ---------- */
#main { flex: 1 1 auto; min-height: 0; display: flex; }

#dropzone {
  flex: 1 1 auto;
  display: flex; align-items: center; justify-content: center;
  padding: 2rem;
}
.dz-inner {
  border: 2px dashed var(--line); border-radius: 18px;
  padding: 3rem 2.5rem; text-align: center; max-width: 620px; width: 100%;
  transition: border-color .15s, background .15s;
}
body.dragover .dz-inner { border-color: var(--accent); background: rgba(96,165,250,.08); }
.dz-icon { font-size: 3rem; }
.dz-inner h2 { font-size: 1.15rem; margin: .6rem 0 .3rem; font-weight: 600; }
.dz-inner p { color: var(--muted); font-size: .85rem; margin-bottom: .9rem; }
.dz-notes { list-style: none; margin-top: 1.6rem; font-size: .8rem; color: var(--muted); text-align: left; display: inline-block; }
.dz-notes li { padding-left: 1.2rem; position: relative; margin: .3rem 0; }
.dz-notes li::before { content: "✓"; position: absolute; left: 0; color: #34d399; }

#viewer {
  position: relative;
  flex: 1 1 auto;
  overflow: auto;
  background: var(--work);
  padding: 1.5rem 1rem 4rem;
  -webkit-overflow-scrolling: touch;
}
#pages { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; }

/* ---------- page ---------- */
.page {
  position: relative;
  background: #fff;
  box-shadow: 0 4px 18px rgba(0,0,0,.45);
  flex: none;
  touch-action: pan-x pan-y;
}
/* 描画系ツールの間だけスクロールを止める（タッチ操作対策） */
.page[data-tool="ellipse"], .page[data-tool="mask"], .page[data-tool="pen"],
.page[data-tool="line"], .page[data-tool="arrow"] { touch-action: none; }
.page[data-tool="select"] .item, .page[data-tool="text"] .item, .page .handle { touch-action: none; }
.page canvas { display: block; width: 100%; height: 100%; }
.page .layer {
  position: absolute; inset: 0;
  overflow: hidden;
}
.page-no {
  position: absolute; left: 0; bottom: -1.25rem;
  font-size: .72rem; color: rgba(255,255,255,.6);
}
.page[data-tool="text"] { cursor: text; }
.page[data-tool="ellipse"], .page[data-tool="mask"], .page[data-tool="pen"], .page[data-tool="image"],
.page[data-tool="line"], .page[data-tool="arrow"] { cursor: crosshair; }

/* ---------- items ---------- */
.item { position: absolute; }
.item.sel { outline: 1px dashed var(--accent); outline-offset: 2px; }

textarea.item {
  border: 0; padding: 0; margin: 0; resize: none;
  background: transparent; overflow: hidden;
  white-space: pre; word-break: normal; overflow-wrap: normal;
  font-kerning: none; font-variant-ligatures: none;
  font-feature-settings: "kern" 0, "liga" 0, "palt" 0;
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
  caret-color: #2563eb;
}
textarea.item:focus { outline: 1px solid var(--accent); outline-offset: 3px; background: rgba(96,165,250,.06); }
textarea.item.dragging { cursor: move; }
.item.img { user-select: none; -webkit-user-drag: none; }
.item.mask { background: #fff; }
.page[data-tool="check"] { cursor: crosshair; }
.item.ellipse, .item.ink, .item.stamp, .item.line { border: 0; background: none; }
.item.ink, .item.line { pointer-events: none; }
.item.line path.hit { stroke: transparent; fill: none; pointer-events: stroke; }
.item.line path.shaft, .item.line path.heads { pointer-events: none; }
.item.ink path.hit { stroke: transparent; fill: none; pointer-events: stroke; }
.item.ink path.line { fill: none; pointer-events: none; }

.handle {
  position: absolute; width: 11px; height: 11px;
  background: #fff; border: 1.5px solid var(--accent);
  border-radius: 2px; z-index: 5;
}
.handle[data-h="nw"] { cursor: nwse-resize; }
.handle[data-h="ne"] { cursor: nesw-resize; }
.handle[data-h="sw"] { cursor: nesw-resize; }
.handle[data-h="se"] { cursor: nwse-resize; }
.handle.end { border-radius: 50%; cursor: move; }
.selbox { position: absolute; outline: 1px dashed var(--accent); pointer-events: none; z-index: 4; }

/* ---------- statusbar / footer ---------- */
#statusbar {
  flex: none; display: flex; gap: 1rem; align-items: center;
  padding: .35rem .9rem; background: var(--panel); border-top: 1px solid var(--line);
  font-size: .75rem; color: var(--muted);
}
#appFooter { flex: none; padding: .8rem 1rem 1.4rem; text-align: center; font-size: .75rem; color: #64748b; }
#appFooter a { color: var(--muted); }
body.has-doc #appFooter { display: none; }

/* ---------- overlay / toast ---------- */
#overlayMsg {
  position: fixed; inset: 0; background: rgba(15,23,42,.72);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  backdrop-filter: blur(2px);
}
.om-box {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 1.2rem 1.6rem; display: flex; align-items: center; gap: .8rem; font-size: .9rem;
}
.spinner {
  width: 20px; height: 20px; border-radius: 50%;
  border: 2.5px solid var(--line); border-top-color: var(--accent);
  animation: spin .8s linear infinite; flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

#toast {
  position: fixed; left: 50%; bottom: 2.2rem; transform: translateX(-50%);
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: .6rem 1.1rem; font-size: .85rem; z-index: 110;
  box-shadow: 0 6px 24px rgba(0,0,0,.5); max-width: min(90vw, 34rem);
}
#toast.err { border-color: var(--danger); color: #fecaca; }

@media (max-width: 700px) {
  .tb-file, .prop-hint, .prop-note, .tb-sep { display: none; }
  .tb-row { padding: .35rem .4rem; gap: .3rem; }
  .tools { gap: 0; padding: .15rem; }
  .tool { min-width: 2.5rem; font-size: .6rem; padding: .25rem .2rem; }
  .tool span { font-size: .95rem; height: 1.05rem; }
  .tool span svg { width: 1.05rem; height: 1.05rem; }
  .btn { padding: .35rem .5rem; font-size: .78rem; }
  .btn.icon { padding: .3rem .4rem; font-size: .9rem; }
  #btnOpen { font-size: 0; padding: .35rem .45rem; }
  #btnOpen::before { content: "📄"; font-size: 1rem; }
  .tb-props { gap: .5rem; }
  .prop-group { gap: .45rem; }
  .prop-group label { font-size: .7rem; gap: .2rem; }
  .prop-group input[type="number"] { width: 3.1rem; }
  .prop-group input, .prop-group select { padding: .2rem .25rem; font-size: .75rem; }
  .prop-group input[type="color"] { width: 1.8rem; height: 1.5rem; }
  #zoomLabel { font-size: .72rem; min-width: 2.8em; }
  #viewer { padding: .6rem .3rem 2.5rem; }
  #statusbar { font-size: .7rem; padding: .3rem .5rem; }
  #statusbar span:first-child { white-space: nowrap; }
}