/* The app's own styles sit in a cascade layer, so the card editor's scoped
   card styles (unlayered) always win over them inside a card. See editor.js. */
@layer app {
/* Parts pages are made of. */

/* ---------- the wave ---------- */

/* Seigaiha, as a mask, so it takes whatever color sits behind it. */
.wave {
  position: absolute; inset: 0; pointer-events: none;
  background: var(--wave-color, var(--wave-ink));
  -webkit-mask: url("/img/seigaiha.svg") repeat;
  mask: url("/img/seigaiha.svg") repeat;
  -webkit-mask-size: var(--wave-size, 36px 18px);
  mask-size: var(--wave-size, 36px 18px);
}
/* The wave is always one even strength across whatever it covers. */

/* ---------- panels ---------- */

.panel {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
}
.panel--pad { padding: 24px; }
.panel__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.panel__title { font: var(--type-heading); letter-spacing: var(--tracking-tight); }
.panel__sub { font: var(--type-caption); color: var(--text-muted); margin-top: 3px; }

.section { margin-top: 48px; }
.section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 18px; }
.section__title { font: var(--type-title); letter-spacing: var(--tracking-tight); }

.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin-bottom: 28px; }
.page-head__title { font: var(--type-title); font-size: 32px; letter-spacing: -0.028em; margin-top: 10px; }
.page-head__sub { margin-top: 6px; color: var(--text-muted); max-width: 60ch; }
.page-head__actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- deck tiles ---------- */

.deck-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 18px; }

.deck-tile {
  position: relative; display: flex; flex-direction: column;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border-soft);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--med), box-shadow var(--med), border-color var(--quick);
  isolation: isolate;
}
.deck-tile:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: color-mix(in oklab, var(--deck) 40%, var(--border)); }
.deck-tile:focus-within { border-color: color-mix(in oklab, var(--deck) 55%, var(--border)); }
.deck-tile__link { position: absolute; inset: 0; z-index: 2; border-radius: inherit; }
.deck-tile__link:focus-visible { outline-offset: -2px; }

/*
 * Every deck plate and card header shares one ground: the deck's color,
 * brightening in one straight, even sweep toward the right and settling a
 * shade darker at the foot, with the seigaiha laid over it at one even
 * strength. The light is a suggestion, not a spotlight — no hot spot, no
 * glowing edges.
 */
.deck-art, .preview-card__band, .scard__band {
  --band-ground: color-mix(in oklab, var(--deck-deep) 86%, var(--deck));
  background:
    linear-gradient(110deg, transparent 35%, color-mix(in oklab, var(--deck) 14%, transparent)),
    linear-gradient(180deg, transparent 45%, rgb(5 6 12 / 0.16)),
    var(--band-ground);
  --wave-color: color-mix(in oklab, var(--deck) 22%, transparent);
}
[data-theme="paper"] :is(.deck-art, .preview-card__band, .scard__band) { --band-ground: color-mix(in oklab, var(--deck-deep) 90%, #000); }

.deck-art { position: relative; height: 128px; overflow: hidden; }
.deck-art__emblem {
  position: absolute; left: 20px; bottom: 16px;
  font: 600 40px/1 var(--font);
  color: #f5f3fb;
  letter-spacing: -0.02em;
}
.deck-art__emblem.is-cjk { font: 700 40px/1 var(--font-mincho); }
.deck-art__due {
  position: absolute; top: 14px; left: 16px;
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding: 0 10px; border-radius: 999px;
  background: rgba(5, 6, 12, 0.5); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  color: #fff; font: 650 12px/1 var(--font); font-variant-numeric: tabular-nums;
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.deck-art__due::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--deck); }
.deck-art__due.is-done::before { background: var(--good); box-shadow: none; }

.deck-tile__body { display: flex; flex-direction: column; gap: 10px; padding: 16px 18px 18px; flex: 1; }
.deck-tile__name { font: 600 16px/1.3 var(--font); letter-spacing: -0.01em; }
.deck-tile__desc { font: 400 14px/1.5 var(--font); color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 3em; }
.deck-tile__foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: auto; }
.deck-tile__study { position: relative; z-index: 3; }

.counts { display: inline-flex; align-items: center; gap: 12px; font: 600 13px/1 var(--font); font-variant-numeric: tabular-nums; }
.counts span { display: inline-flex; align-items: center; gap: 5px; }
.counts .n { color: var(--c-new); }
.counts .l { color: var(--c-learn); }
.counts .r { color: var(--c-review); }
.counts .z { color: var(--text-faint); }
.counts small { font: 500 11px/1 var(--font); color: var(--text-faint); letter-spacing: 0.02em; }

.mastery { height: 4px; border-radius: 4px; background: var(--surface-active); overflow: hidden; display: flex; }
.mastery span { height: 100%; }
.mastery .m { background: var(--deck, var(--accent)); }
.mastery .y { background: color-mix(in oklab, var(--deck, var(--accent)) 45%, var(--surface-active)); }

.new-tile {
  display: grid; place-items: center; align-content: center; gap: 12px;
  min-height: 268px; border-radius: var(--radius-lg);
  border: 1.5px dashed var(--border); color: var(--text-muted);
  transition: border-color var(--quick), color var(--quick), background-color var(--quick);
}
.new-tile:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.new-tile .plus { width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-2); }
.new-tile span { font: 600 14px/1 var(--font); }

/* ---------- chips & badges ---------- */

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 24px; padding: 0 9px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border-soft);
  color: var(--text-dim); font: 600 11.5px/1 var(--font); white-space: nowrap;
}
.chip--new { color: var(--c-new); background: color-mix(in oklab, var(--c-new) 10%, transparent); border-color: color-mix(in oklab, var(--c-new) 22%, transparent); }
.chip--learn { color: var(--c-learn); background: color-mix(in oklab, var(--c-learn) 10%, transparent); border-color: color-mix(in oklab, var(--c-learn) 22%, transparent); }
.chip--review { color: var(--c-review); background: color-mix(in oklab, var(--c-review) 10%, transparent); border-color: color-mix(in oklab, var(--c-review) 22%, transparent); }
.chip--muted { color: var(--text-muted); }
.chip--accent { color: var(--accent); background: var(--accent-soft); border-color: var(--accent-line); }
.tag { display: inline-flex; align-items: center; height: 22px; padding: 0 8px; border-radius: 6px; background: var(--surface-2); color: var(--text-muted); font: 550 11.5px/1 var(--font); }
.tag::before { content: "#"; color: var(--text-faint); margin-right: 1px; }

/* ---------- segmented control & tabs ---------- */

.segmented {
  display: inline-flex; padding: 3px; gap: 2px; border-radius: 11px;
  background: var(--bg-elevated); border: 1px solid var(--border-soft);
  overflow-x: auto; max-width: 100%; scrollbar-width: none;
}
.segmented::-webkit-scrollbar { display: none; }
.segmented button {
  height: 32px; padding: 0 13px; border-radius: 8px; flex: none;
  color: var(--text-muted); font: 550 13px/1 var(--font); white-space: nowrap;
  display: inline-flex; align-items: center; gap: 7px;
  transition: background-color var(--quick), color var(--quick), box-shadow var(--quick);
}
.segmented button:hover { color: var(--text); }
.segmented button[aria-pressed="true"], .segmented button[aria-selected="true"], .segmented button[aria-checked="true"] {
  background: var(--surface-active); color: var(--text); box-shadow: var(--shadow-sm);
}
.segmented .count { color: var(--text-faint); font-variant-numeric: tabular-nums; font-size: 12px; }

/* ---------- menus ---------- */

.menu {
  position: fixed; z-index: 200;
  min-width: 220px; max-width: 320px; padding: 6px;
  border-radius: 14px;
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  transform-origin: top right;
  animation: pop-in 0.16s var(--ease-out);
}
@keyframes pop-in { from { opacity: 0; transform: scale(0.96) translateY(-4px); } }
.menu__item {
  display: flex; align-items: center; gap: 11px; width: 100%;
  height: 38px; padding: 0 11px; border-radius: 9px;
  color: var(--text-dim); font: 500 14px/1 var(--font); text-align: left;
}
.menu__item:hover, .menu__item:focus-visible { background: var(--surface-hover); color: var(--text); outline: none; }
.menu__item .icon { width: 17px; height: 17px; color: var(--text-muted); }
.menu__item kbd { margin-left: auto; }
.menu__item--danger { color: var(--danger); }
.menu__item--danger .icon { color: var(--danger); }
.menu__item--danger:hover { background: var(--danger-soft); color: var(--danger); }
.menu__sep { height: 1px; margin: 6px 4px; background: var(--border-soft); }
.menu__label { padding: 10px 11px 6px; font: var(--type-label); letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--text-faint); }

/* ---------- dialogs ---------- */

.dialog {
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100dvh - 48px);
  padding: 0; border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface); color: var(--text);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.dialog[open] { display: flex; flex-direction: column; animation: dialog-in 0.26s var(--ease-out); }
.dialog::backdrop { background: var(--scrim); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); animation: fade-in 0.2s var(--ease); }
@keyframes dialog-in { from { opacity: 0; transform: translateY(10px) scale(0.985); } }
@keyframes fade-in { from { opacity: 0; } }
.dialog--wide { width: min(1080px, calc(100vw - 32px)); }
.dialog--md { width: min(760px, calc(100vw - 32px)); }
.dialog__head {
  position: relative; display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 22px 24px 0;
}
.dialog__title { font: 650 19px/1.3 var(--font); letter-spacing: -0.015em; }
.dialog__sub { margin-top: 4px; color: var(--text-muted); font: var(--type-caption); }
.dialog__body { padding: 20px 24px; overflow: auto; flex: 1; }
.dialog__foot {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 10px;
  padding: 16px 24px; border-top: 1px solid var(--border-soft);
  background: color-mix(in oklab, var(--surface) 70%, var(--bg-elevated));
}
.dialog__foot .left { margin-right: auto; }

@media (max-width: 640px) {
  .dialog { width: 100vw; max-width: 100vw; max-height: 92dvh; margin: auto 0 0; border-radius: 22px 22px 0 0; border-bottom: 0; }
  .dialog[open] { animation: sheet-in 0.32s var(--ease-out); }
  @keyframes sheet-in { from { transform: translateY(40px); opacity: 0; } }
  .dialog__foot { padding-bottom: calc(16px + env(safe-area-inset-bottom)); }
}

/* ---------- toasts ---------- */

/* A manual popover (so it can sit above open dialogs): the browser's popover
   look — centered, bordered, opaque — is undone. */
.toasts {
  position: fixed; inset: auto 20px 20px auto; z-index: 500;
  margin: 0; padding: 0; border: 0; background: transparent; color: inherit; overflow: visible;
  flex-direction: column; align-items: flex-end; gap: 10px;
  pointer-events: none;
}
.toasts:popover-open, .toasts:not([popover]) { display: flex; }
.toast {
  pointer-events: auto;
  display: flex; align-items: center; gap: 12px;
  min-width: 260px; max-width: min(440px, calc(100vw - 40px));
  padding: 12px 12px 12px 16px; border-radius: 14px;
  background: var(--surface-active); color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  font: 500 14px/1.4 var(--font);
  animation: toast-in 0.32s var(--ease-out);
}
.toast.is-leaving { animation: toast-out 0.2s var(--ease) forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateY(12px) scale(0.98); } }
@keyframes toast-out { to { opacity: 0; transform: translateY(6px) scale(0.98); } }
.toast__icon { flex: none; width: 20px; height: 20px; color: var(--success); }
.toast--error .toast__icon { color: var(--danger); }
.toast__msg { flex: 1; }
.toast .btn { height: 30px; padding: 0 12px; font-size: 13px; }
@media (max-width: 820px) {
  .toasts { inset: auto 12px calc(84px + env(safe-area-inset-bottom)) 12px; align-items: stretch; }
  .toast { max-width: none; }
}

/* ---------- empty states ---------- */

.empty {
  position: relative; overflow: hidden;
  display: grid; justify-items: center; text-align: center; gap: 12px;
  padding: 56px 24px; border-radius: var(--radius-lg);
  border: 1px dashed var(--border); background: var(--bg-elevated);
}
.empty__mark { color: var(--text-faint); }
.empty__mark .icon { width: 36px; height: 36px; }
.empty__title { font: var(--type-heading); }
.empty__text { color: var(--text-muted); max-width: 44ch; }
.empty .btn { margin-top: 8px; }

/* ---------- skeletons ---------- */

.skeleton {
  border-radius: var(--radius);
  background: linear-gradient(100deg, var(--surface) 30%, var(--surface-2) 50%, var(--surface) 70%);
  background-size: 300% 100%;
  animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer { from { background-position: 100% 0; } to { background-position: -100% 0; } }

/* ---------- stat tiles ---------- */

.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.stat {
  position: relative; overflow: hidden;
  padding: 18px 20px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border-soft);
}
.stat__label { font: var(--type-label); letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--text-muted); display: flex; align-items: center; gap: 8px; }
.stat__value { margin-top: 10px; font: 600 32px/1 var(--font); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.stat__value small { font: 500 14px/1 var(--font); color: var(--text-muted); letter-spacing: 0; margin-left: 4px; }
.stat__note { margin-top: 8px; font: var(--type-caption); color: var(--text-muted); }

/* ---------- swatches ---------- */

.swatches { display: flex; flex-wrap: wrap; gap: 10px; }
.swatch {
  position: relative; width: 38px; height: 38px; border-radius: 12px;
  background: linear-gradient(150deg, var(--deck), var(--deck-deep));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
  transition: transform var(--quick);
}
.swatch:hover { transform: translateY(-2px); }
.swatch[aria-checked="true"] { box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px var(--deck); }
.swatch[aria-checked="true"]::after { content: ""; position: absolute; inset: 0; margin: auto; width: 8px; height: 8px; border-radius: 50%; background: #fff; }

/* ---------- progress ---------- */

.progress { height: 3px; background: var(--border-soft); border-radius: 3px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--neon); border-radius: 3px; transition: width 0.4s var(--ease-out); }

/* ---------- popover (editor color pickers, ruby input) ---------- */

.popover {
  position: fixed; z-index: 210;
  padding: 12px; border-radius: 14px;
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  animation: pop-in 0.14s var(--ease-out);
}

/* ---------- shortcut sheet ---------- */

.shortcuts { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px 36px; }
.shortcuts h3 { font: var(--type-label); letter-spacing: var(--tracking-caps); text-transform: uppercase; color: var(--text-muted); margin-bottom: 10px; }
.shortcuts dl { display: grid; grid-template-columns: 1fr auto; gap: 9px 16px; margin: 0; align-items: center; }
.shortcuts dt { color: var(--text-dim); }
.shortcuts dd { margin: 0; display: flex; gap: 4px; justify-content: flex-end; }

/* ---------- studying / paused ---------- */

.pause-switch {
  position: relative; z-index: 3; flex: none;
  display: inline-flex; align-items: center; gap: 6px;
  height: 28px; padding: 0 10px 0 9px; border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted); font: 600 12px/1 var(--font);
  transition: background-color var(--quick), border-color var(--quick), color var(--quick);
}
.pause-switch:hover { border-color: var(--border-strong); color: var(--text); }
.pause-switch__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); }
.pause-switch__tip {
  position: absolute; right: -4px; bottom: calc(100% + 8px); z-index: 10;
  width: max-content; max-width: 240px; padding: 8px 10px; border-radius: 8px;
  background: var(--surface-active); border: 1px solid var(--border); box-shadow: var(--shadow);
  color: var(--text); font: 500 12.5px/1.45 var(--font); text-align: left; white-space: normal;
  opacity: 0; transform: translateY(2px); pointer-events: none;
  transition: opacity 0.12s var(--ease), transform 0.12s var(--ease);
}
.pause-switch:hover .pause-switch__tip, .pause-switch:focus-visible .pause-switch__tip { opacity: 1; transform: none; transition-delay: 0.25s; }
.pause-switch.is-paused { border-color: var(--border-input); background: transparent; color: var(--text-muted); }
.pause-switch.is-paused .pause-switch__dot { background: transparent; border: 2px solid var(--text-faint); box-shadow: none; width: 9px; height: 9px; }
.pause-switch.is-paused:hover { border-color: var(--text-muted); color: var(--text); }
.pause-switch--compact { height: 26px; padding: 0 9px 0 8px; font-size: 11.5px; }
.deck-tile__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.deck-tile.is-paused .deck-art { filter: saturate(0.25) brightness(0.8); }
.deck-tile.is-paused .deck-tile__name { color: var(--text-dim); }
.deck-art__due.is-paused::before { background: var(--text-faint); box-shadow: none; }
.count-pill { display: inline-grid; place-items: center; min-width: 24px; height: 22px; padding: 0 7px; margin-left: 8px; border-radius: 999px; background: var(--surface-2); color: var(--text-muted); font: 600 12px/1 var(--font); }
.section__title--sm { font-size: 18px; margin-bottom: 14px; display: flex; align-items: center; }
.section--tight { margin-top: 28px; }

/* Cards are clipped to their frame: deck styling can't draw outside it. */
.scard, .preview-card { contain: paint; }

.pager { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 16px; }
.import-errors { display: grid; gap: 6px; max-height: 50vh; overflow: auto; font-size: 14px; }
.import-errors b { color: var(--text); }


/* ---------- welcome back (backlog) ---------- */

.backlog {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr); gap: 20px 32px; align-items: center;
  padding: 22px 26px; margin-bottom: 28px; border-radius: var(--radius-lg);
  background: linear-gradient(120deg, color-mix(in oklab, var(--accent) 9%, var(--surface)), var(--surface) 60%);
  border: 1px solid var(--accent-line);
  animation: pop-in 0.25s var(--ease-out);
}
.backlog__title { margin-top: 8px; font: var(--type-heading); font-size: 20px; letter-spacing: -0.015em; }
.backlog__lede { margin-top: 6px; color: var(--text-dim); max-width: 60ch; }
.backlog__actions { display: grid; gap: 12px; justify-items: start; }
.backlog__buttons { display: flex; gap: 10px; flex-wrap: wrap; }
@media (max-width: 900px) { .backlog { grid-template-columns: 1fr; } }

/* ---------- sample decks ---------- */
.samples { display: grid; gap: 10px; }
.samples__item { display: grid; grid-template-columns: 96px minmax(0, 1fr) auto; align-items: center; gap: 16px; padding: 10px 14px 10px 10px; border-radius: var(--radius); border: 1px solid var(--border-soft); background: var(--surface-2); }
.samples__art { position: relative; height: 64px; border-radius: 12px; overflow: hidden; }
.samples__art .deck-art { position: absolute; inset: 0; height: 100%; }
.samples__art .deck-art__emblem { font-size: 30px; left: 12px; bottom: 6px; }
.samples__name { font: 650 15px/1.3 var(--font); }
.samples__desc { margin: 2px 0 4px; color: var(--text-dim); font-size: 13.5px; line-height: 1.45; }
@media (max-width: 560px) { .samples__item { grid-template-columns: 64px minmax(0, 1fr); } .samples__item .btn { grid-column: 2; justify-self: start; } }
}