@font-face { font-family: "TsukuA"; font-weight: 400; src: local("TsukuARdGothic-Regular"), local("Tsukushi A Round Gothic Regular"), local("筑紫A丸ゴシック レギュラー"); }
@font-face { font-family: "TsukuA"; font-weight: 700; src: local("TsukuARdGothic-Bold"), local("Tsukushi A Round Gothic Bold"), local("筑紫A丸ゴシック ボールド"); }

:root {
  --black: #2b3639;
  --white: #fefefe;
  --blue: #2f9cd6;
  --border: color-mix(in srgb, var(--black) 15%, var(--white));
  --surface: color-mix(in srgb, var(--black) 5%, var(--white));
  --muted: color-mix(in srgb, var(--black) 70%, var(--white));
  --font: "Zen Maru Gothic", "TsukuA", "Hiragino Maru Gothic ProN", sans-serif;
  --panel: 320px;
}

*, ::before, ::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--white);
  color: var(--black);
  font-family: var(--font);
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
}
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; -webkit-tap-highlight-color: transparent; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: 0.25rem; }
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 0.8rem; line-height: 1.7; letter-spacing: 1px; margin: 0; }

/* ---------- layout ---------- */
.app { display: grid; grid-template-columns: minmax(0, 1fr) var(--panel); height: 100svh; }
.app[data-state="empty"] { grid-template-columns: minmax(0, 1fr); }
.app[data-state="empty"] .panel,
.app[data-state="empty"] .modes,
.app[data-state="empty"] .frame,
.app[data-state="empty"] .stage-hint,
.app:not([data-state="empty"]) .empty { display: none; }

.stage { position: relative; overflow: hidden; background: var(--surface); }
.app[data-state="empty"] .stage { background: var(--white); }

/* ---------- empty (firstview) ---------- */
.empty { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; padding: 40px 24px; text-align: center; }
.title { margin: 0; font-size: 50px; font-weight: 400; letter-spacing: 5px; }
.intro { margin: 1.25rem 0 2.25rem; font-size: 16px; line-height: 1.8; letter-spacing: 1.6px; }
.nav-link { color: var(--blue); font-size: 24px; letter-spacing: 2.4px; }
.hint { margin: 0.5rem 0 0; color: var(--muted); font-size: 0.85rem; letter-spacing: 1px; }
@media (hover: hover) { .nav-link:hover { text-decoration: underline; text-underline-offset: 0.2em; } }
@media (max-width: 640px) { .title { font-size: 32px; letter-spacing: 3px; } .nav-link { font-size: 18px; } }

/* ---------- stage ---------- */
.frame { position: absolute; left: 0; top: 0; touch-action: none; }
.frame canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
#ov { cursor: grab; }
.app[data-mode="note"] #ov { cursor: crosshair; }

.modes {
  position: absolute; top: 18px; left: 50%; translate: -50%; z-index: 2;
  display: flex; gap: 4px; padding: 4px;
  background: color-mix(in srgb, var(--white) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-radius: 999px;
}
.modes button { padding: 0.35em 1.1em; border-radius: 999px; letter-spacing: 2px; font-size: 0.9rem; color: var(--muted); transition: color .15s, background-color .15s; }
.modes button[aria-selected="true"] { color: var(--blue); background: var(--white); box-shadow: 0 0 0 1px var(--border); }
@media (hover: hover) { .modes button:hover { color: var(--blue); } }

.stage-hint { position: absolute; bottom: 14px; left: 50%; translate: -50%; width: max-content; max-width: calc(100% - 32px); margin: 0; text-align: center; line-height: 1.7; color: var(--muted); font-size: 0.78rem; letter-spacing: 1px; pointer-events: none; }
.stage-hint kbd { font-family: inherit; background: var(--white); border: 1px solid var(--border); border-radius: 0.25rem; padding: 0 0.35em; }

.drop { position: absolute; inset: 12px; z-index: 3; display: grid; place-items: center; border: 2px dashed var(--blue); border-radius: 13px; background: color-mix(in srgb, var(--white) 80%, transparent); color: var(--blue); font-size: 1.2rem; letter-spacing: 2.4px; opacity: 0; pointer-events: none; transition: opacity .15s; }
.stage.dragging .drop { opacity: 1; }

/* ---------- panel ---------- */
.panel { overflow-y: auto; border-left: 1px solid var(--border); background: var(--white); padding: 0 24px 32px; letter-spacing: 1px; font-size: 0.9rem; }
.panel-head { position: sticky; top: 0; z-index: 1; display: flex; align-items: baseline; justify-content: space-between; padding: 22px 0 14px; background: var(--white); }
.brand { font-size: 1.15rem; font-weight: 400; letter-spacing: 3px; }
.text-btn { color: var(--blue); font-size: 0.8rem; letter-spacing: 1px; }
@media (hover: hover) { .text-btn:hover { text-decoration: underline; text-underline-offset: 0.2em; } }

.group { padding: 18px 0 8px; border-top: 1px solid var(--border); }
.group h2 { display: flex; align-items: center; gap: 10px; margin: 0 0 10px; font-size: 0.95rem; font-weight: 700; letter-spacing: 1.6px; }
.group h2::before { content: ""; width: 11px; height: 11px; border: 2px solid var(--blue); border-radius: 50%; background: var(--white); flex-shrink: 0; }

.field { display: grid; grid-template-columns: 1fr auto; align-items: center; padding: 6px 0 2px; cursor: default; user-select: none; }
.field > span { font-size: 0.85rem; }
.field output { color: var(--muted); font-size: 0.8rem; font-variant-numeric: tabular-nums; cursor: pointer; }
.field input { grid-column: 1 / -1; }

.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 38px; font-size: 0.85rem; }
.checks { justify-content: flex-start; gap: 20px; }
.checks label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
input[type="checkbox"] { accent-color: var(--blue); margin: 0; }

/* range: 1px rail + timeline dot */
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; margin: 0; background: transparent; cursor: pointer; --a: 0%; --b: 0%; }
input[type="range"]::-webkit-slider-runnable-track { height: 2px; border-radius: 2px; background: linear-gradient(to right, var(--border) var(--a), var(--blue) var(--a), var(--blue) var(--b), var(--border) var(--b)); }
input[type="range"]::-moz-range-track { height: 2px; border-radius: 2px; background: linear-gradient(to right, var(--border) var(--a), var(--blue) var(--a), var(--blue) var(--b), var(--border) var(--b)); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 13px; height: 13px; margin-top: -5.5px; border: 2px solid var(--blue); border-radius: 50%; background: var(--white); transition: transform .12s; }
input[type="range"]::-moz-range-thumb { width: 9px; height: 9px; border: 2px solid var(--blue); border-radius: 50%; background: var(--white); }
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.25); }

/* segmented (nav-link style) */
.seg { display: flex; gap: 14px; }
.seg button { color: var(--muted); font-size: 0.85rem; letter-spacing: 1px; padding: 4px 0; }
.seg button[aria-pressed="true"] { color: var(--blue); text-decoration: underline; text-underline-offset: 0.35em; text-decoration-thickness: 1px; }
@media (hover: hover) { .seg button:hover { color: var(--blue); } }

.swatches { display: flex; gap: 10px; align-items: center; }
.swatches button, .swatch-custom { width: 20px; height: 20px; border-radius: 50%; background: var(--c); box-shadow: inset 0 0 0 1px var(--border); }
.swatches [data-color="#ffffff"] { --c: #ffffff; }
.swatches [data-color="#2b3639"] { --c: var(--black); }
.swatches [aria-pressed="true"] { outline: 2px solid var(--blue); outline-offset: 2px; }
.swatch-custom { position: relative; overflow: hidden; cursor: pointer; background: conic-gradient(#f66, #fd5, #6d8, #5bf, #a7f, #f66); }
.swatch-custom input { position: absolute; inset: -8px; opacity: 0; cursor: pointer; }

/* notes */
.notes { list-style: none; margin: 0 0 6px; padding: 0; display: grid; gap: 8px; }
.notes:empty { display: none; }
.notes:not(:empty) + .empty-notes { display: none; }
.empty-notes { margin: 6px 0 4px; }
.note { position: relative; padding: 10px 12px 8px; border-radius: 13px; background: var(--surface); box-shadow: inset 0 0 0 1px transparent; transition: box-shadow .15s; }
.note.selected { box-shadow: inset 0 0 0 1px var(--blue); }
.note textarea { display: block; width: 100%; resize: none; border: 0; padding: 0; background: transparent; color: var(--black); font-family: "TsukuA", var(--font); font-size: 0.95rem; line-height: 1.7; letter-spacing: 1px; field-sizing: content; min-height: 1.7em; }
.note textarea:focus { outline: none; }
.note textarea::placeholder { color: var(--muted); opacity: .7; }
.note-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 6px; }
.note-foot .seg { gap: 10px; }
.note-foot .seg button { font-size: 0.75rem; padding: 2px 0; }
.note-del { color: var(--muted); font-size: 0.75rem; }
@media (hover: hover) { .note-del:hover { color: #d6452f; } }

/* export (contact-link style) */
.export { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; column-gap: 1rem; width: 100%; margin-top: 10px; padding: 1rem 0.5rem; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); text-align: left; }
.export-label { font-size: 1rem; letter-spacing: 1.6px; }
.export-meta { color: var(--muted); font-size: 0.78rem; font-variant-numeric: tabular-nums; text-align: right; }
.export-arrow { color: var(--muted); transition: translate .2s; }
@media (hover: hover) {
  .export:hover .export-label { color: var(--blue); text-decoration: underline; text-underline-offset: 0.2em; }
  .export:hover .export-arrow { color: var(--blue); translate: 3px 0; }
}
.export:disabled { opacity: .5; cursor: progress; }
#status { min-height: 1.7em; margin-top: 8px; }

/* ---------- small screens ---------- */
@media (max-width: 820px) {
  .app:not([data-state="empty"]) { grid-template-columns: 1fr; grid-template-rows: 62svh auto; height: auto; }
  .panel { border-left: 0; border-top: 1px solid var(--border); overflow: visible; }
  .panel-head { position: static; }
}