/* ============================================================================
   japanese.org — the study application
   ========================================================================= */

body.app { overflow: hidden; }

.shell {
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  grid-template-areas: "rail main";
  height: 100dvh;
}
@media (max-width: 900px) {
  /* The rail becomes a bottom bar; main keeps the whole remaining height. */
  .shell {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(0,1fr) auto;
    grid-template-areas: "main" "rail";
  }
}

/* ---------- rail --------------------------------------------------------- */

.rail {
  grid-area: rail;
  border-right: 1px solid var(--hairline);
  background: var(--washi-2);
  display: flex; flex-direction: column;
  padding: 1.1rem .8rem;
  gap: .3rem;
  overflow-y: auto;
}
.rail__brand {
  display: flex; align-items: center; gap: .6rem;
  padding: .3rem .55rem 1.3rem;
}
.rail__brand .brand__mark { width: 26px; height: 26px; font-size: .85rem; }
.rail__brand b { font-family: var(--serif); font-size: .98rem; font-weight: 400; color: var(--sumi); }

.navi {
  display: flex; align-items: center; gap: .7rem;
  padding: .6rem .65rem;
  border-radius: 9px;
  font-family: var(--sans); font-size: .855rem;
  color: var(--ink-soft);
  width: 100%; text-align: left;
  position: relative;
  transition: background-color .22s, color .22s;
}
.navi:hover { background: var(--hairline-2); color: var(--sumi); }
.navi.on { background: var(--sumi); color: var(--paper); }
.navi__k {
  font-family: var(--mincho); font-size: 1.02rem; width: 1.3rem; text-align: center;
  color: var(--shu); flex: none;
}
.navi.on .navi__k { color: var(--paper); }
.navi__badge {
  margin-left: auto;
  font-family: var(--mono); font-size: .66rem;
  background: var(--shu); color: #fff;
  padding: .12em .45em; border-radius: 100px;
  min-width: 1.5em; text-align: center;
}
.navi.on .navi__badge { background: var(--paper); color: var(--sumi); }

.rail__spacer { flex: 1; min-height: 1rem; }
.rail__foot { display: grid; gap: .5rem; padding: .4rem .3rem 0; border-top: 1px solid var(--hairline); }
.rail__meter { display: grid; gap: .35rem; padding: .55rem .35rem; }
.rail__meter span {
  display: flex; justify-content: space-between;
  font-family: var(--sans); font-size: .68rem; color: var(--ink-faint);
}
.rail__meter i { display: block; height: 4px; border-radius: 4px; background: var(--hairline); overflow: hidden; }
.rail__meter i b { display: block; height: 100%; background: var(--shu); border-radius: 4px; transition: width .6s var(--ease-out); }

@media (max-width: 900px) {
  .rail {
    flex-direction: row; border-right: 0; border-top: 1px solid var(--hairline);
    padding: .45rem .5rem; gap: .2rem;
    overflow-x: auto; align-items: center;
  }
  .rail__brand, .rail__spacer, .rail__foot { display: none; }
  .navi { flex-direction: column; gap: .15rem; font-size: .62rem; padding: .45rem .6rem; }
  .navi__k { font-size: 1.15rem; width: auto; }
  .navi__badge { position: absolute; top: .1rem; right: .25rem; margin: 0; font-size: .55rem; }
}

/* ---------- main --------------------------------------------------------- */

.main { grid-area: main; overflow-y: auto; position: relative; min-width: 0; }
.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  padding: .85rem clamp(1rem, 3vw, 2.2rem);
  background: color-mix(in srgb, var(--washi) 88%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.topbar h1 { font-size: 1.12rem; letter-spacing: -.012em; }
.topbar__jp { font-family: var(--mincho); color: var(--ink-faint); font-size: .82rem; margin-left: .55rem; }

.view {
  padding: clamp(1.2rem, 3vw, 2.4rem) clamp(1rem, 3vw, 2.2rem) 4rem;
  max-width: 1180px; margin-inline: auto;
}
.view[hidden] { display: none; }

/* ---------- dashboard ---------------------------------------------------- */

.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; }
@media (max-width: 980px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
.tile {
  border: 1px solid var(--hairline); border-radius: var(--r-m);
  background: var(--paper); padding: 1.05rem 1.15rem;
  display: grid; gap: .2rem; align-content: start;
}
.tile__l {
  font-family: var(--sans); font-size: .64rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-faint);
}
.tile__v { font-family: var(--serif); font-size: 2.05rem; line-height: 1.05; color: var(--sumi); letter-spacing: -.03em; }
.tile__v small { font-size: .44em; color: var(--ink-faint); letter-spacing: 0; margin-left: .2em; }
.tile__s { font-size: .78rem; color: var(--ink-soft); }
.tile--go { background: var(--panel); border-color: var(--panel); }
.tile--go .tile__l { color: var(--onink-faint); }
.tile--go .tile__v { color: var(--onink); }
.tile--go .tile__s { color: var(--onink-soft); }

.panel {
  border: 1px solid var(--hairline); border-radius: var(--r-l);
  background: var(--paper); padding: clamp(1.1rem, 2.4vw, 1.6rem);
}
.panel__h {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap; margin-bottom: 1.1rem;
}
.panel__h h3 { font-size: 1.02rem; }
.panel__h p { font-size: .78rem; color: var(--ink-faint); }

/* forecast bars */
.fcast { display: flex; align-items: flex-end; gap: 3px; height: 118px; }
.fcast__d { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; height: 100%; position: relative; }
.fcast__d i {
  display: block; width: 100%; border-radius: 3px 3px 0 0;
  background: var(--shu); opacity: .82; min-height: 2px;
  transition: height .7s var(--ease-out), opacity .2s;
}
.fcast__d:first-child i { background: var(--sumi); opacity: 1; }
.fcast__d:hover i { opacity: 1; }
.fcast__d::after {
  content: attr(data-n);
  position: absolute; top: -1.2rem; left: 50%; transform: translateX(-50%);
  font-family: var(--mono); font-size: .62rem; color: var(--ink-faint);
  opacity: 0; transition: opacity .2s; pointer-events: none;
}
.fcast__d:hover::after { opacity: 1; }
.fcast__ax {
  display: flex; justify-content: space-between; margin-top: .5rem;
  font-family: var(--mono); font-size: .64rem; color: var(--ink-faint);
}

/* activity heatmap — a year of columns, sized to whatever width it gets */
.heat {
  display: grid; grid-auto-flow: column;
  grid-template-rows: repeat(7, 1fr);
  grid-auto-columns: minmax(0, 1fr);
  gap: 2px;
  overflow-x: auto;
}
.heat i {
  width: 100%; aspect-ratio: 1; border-radius: 2px;
  background: var(--hairline-2);
  min-width: 6px;
}
.heat i[data-l="1"] { background: color-mix(in srgb, var(--shu) 22%, transparent); }
.heat i[data-l="2"] { background: color-mix(in srgb, var(--shu) 45%, transparent); }
.heat i[data-l="3"] { background: color-mix(in srgb, var(--shu) 70%, transparent); }
.heat i[data-l="4"] { background: var(--shu); }
.heat__legend {
  display: flex; align-items: center; gap: .3rem; justify-content: flex-end;
  margin-top: .7rem; font-family: var(--sans); font-size: .66rem; color: var(--ink-faint);
}
.heat__legend i { width: 10px; height: 10px; border-radius: 2.5px; }

/* progress rings */
.rings { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem; }
.ring { display: grid; justify-items: center; gap: .5rem; }
.ring svg { width: 78px; height: 78px; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 7; stroke-linecap: round; }
.ring .bg { stroke: var(--hairline); }
.ring .fg { stroke: var(--shu); transition: stroke-dashoffset 1s var(--ease-out); }
.ring b { font-family: var(--serif); font-size: 1rem; color: var(--sumi); }
.ring span { font-family: var(--sans); font-size: .68rem; color: var(--ink-faint); text-align: center; }
.ring__wrap { position: relative; display: grid; place-items: center; }
.ring__n {
  position: absolute; font-family: var(--serif); font-size: 1.15rem; color: var(--sumi);
}

/* ---------- review session ----------------------------------------------- */

.sesh { max-width: 720px; margin-inline: auto; }
.sesh__bar {
  height: 3px; background: var(--hairline); border-radius: 3px;
  overflow: hidden; margin-bottom: 2rem;
}
.sesh__bar i { display: block; height: 100%; background: var(--shu); width: 0; transition: width .45s var(--ease-out); }

.qcard {
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: var(--r-l);
  padding: clamp(1.6rem, 5vw, 3rem) clamp(1.2rem, 4vw, 2.4rem);
  text-align: center;
  box-shadow: var(--shadow-2);
  min-height: 340px;
  display: flex; flex-direction: column; justify-content: center; gap: 1.3rem;
  animation: qIn .42s var(--ease-out);
}
@keyframes qIn { from { opacity: 0; transform: translateY(10px) scale(.99); } to { opacity: 1; transform: none; } }
.qcard__type {
  font-family: var(--sans); font-size: .64rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-faint);
}
.qcard__front {
  font-family: var(--mincho);
  font-size: clamp(3.4rem, 12vw, 6rem); line-height: 1.05; color: var(--sumi);
}
.qcard__front.small { font-size: clamp(2.2rem, 7vw, 3.4rem); }
.qcard__hint { font-size: .88rem; color: var(--ink-faint); }
.qcard__back { display: grid; gap: .8rem; animation: qIn .3s var(--ease-out); }
.qcard__ans { font-family: var(--serif); font-size: clamp(1.3rem, 3vw, 1.8rem); color: var(--sumi); }
.qcard__read { font-family: var(--mincho); font-size: 1.15rem; color: var(--shu); }
.qcard__note { font-size: .88rem; color: var(--ink-soft); max-width: 46ch; margin-inline: auto; line-height: 1.6; }
.qcard__ex {
  border-top: 1px solid var(--hairline); padding-top: .9rem; margin-top: .3rem;
  display: grid; gap: .3rem;
}
.qcard__ex b { font-family: var(--mincho); font-weight: 400; font-size: 1.1rem; color: var(--sumi); }
.qcard__ex span { font-size: .82rem; color: var(--ink-faint); }

.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; margin-top: 1.4rem; }
@media (max-width: 560px) { .grades { grid-template-columns: repeat(2, 1fr); } }
.grade {
  border: 1px solid var(--hairline); border-radius: var(--r-m);
  padding: .75rem .5rem; background: var(--paper);
  display: grid; gap: .15rem; justify-items: center;
  transition: all .22s var(--ease);
}
.grade:hover { transform: translateY(-2px); box-shadow: var(--shadow-1); border-color: currentColor; }
.grade b { font-family: var(--sans); font-size: .84rem; font-weight: 600; }
.grade span { font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); }
.grade kbd {
  font-family: var(--mono); font-size: .6rem; color: var(--ink-faint);
  border: 1px solid var(--hairline); border-radius: 3px; padding: 0 .28em;
}
.grade--again { color: var(--shu); }
.grade--hard  { color: var(--warn); }
.grade--good  { color: var(--ok); }
.grade--easy  { color: var(--ai); }

.sesh__done { text-align: center; display: grid; gap: 1.2rem; justify-items: center; padding-block: 2rem; }
.sesh__done .seal { width: 3.4rem; height: 3.4rem; font-size: 1.5rem; }

/* ---------- kanji browser ------------------------------------------------ */

.filters { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; margin-bottom: 1.2rem; }
.field {
  border: 1px solid var(--hairline); border-radius: 100px;
  padding: .5em 1em; background: var(--paper);
  font-family: var(--sans); font-size: .84rem;
  flex: 1 1 260px; max-width: 360px;
  transition: border-color .25s;
}
.field:focus { outline: none; border-color: var(--shu); }

.kgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: .55rem; }
.kcell {
  aspect-ratio: 1;
  border: 1px solid var(--hairline); border-radius: var(--r-m);
  background: var(--paper);
  display: grid; place-items: center; align-content: center; gap: .1rem;
  transition: all .28s var(--ease-out);
  position: relative; overflow: hidden;
}
.kcell:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); border-color: var(--shu); }
.kcell b { font-family: var(--mincho); font-size: 2rem; font-weight: 400; color: var(--sumi); line-height: 1; }
.kcell span { font-family: var(--sans); font-size: .64rem; color: var(--ink-faint); }
.kcell::after {
  content: ""; position: absolute; inset: auto 0 0 0; height: 2px;
  background: var(--shu); transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease-out);
}
.kcell.known::after { transform: scaleX(1); }
.kcell.on { border-color: var(--sumi); box-shadow: var(--shadow-2); }

/* detail drawer */
.drawer {
  position: fixed; inset: 0 0 0 auto; z-index: 90;
  width: min(460px, 100%);
  background: var(--paper);
  border-left: 1px solid var(--hairline);
  box-shadow: var(--shadow-3);
  transform: translateX(101%);
  transition: transform .45s var(--ease-out);
  display: flex; flex-direction: column;
}
.drawer.on { transform: none; }
.drawer__h {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.2rem; border-bottom: 1px solid var(--hairline);
}
.drawer__b { padding: 1.3rem 1.4rem 2.4rem; overflow-y: auto; display: grid; gap: 1.2rem; }
.drawer__paper {
  aspect-ratio: 1; max-width: 260px; margin-inline: auto; width: 100%;
  position: relative; border-radius: var(--r-m);
  background:
    linear-gradient(var(--hairline-2) 1px, transparent 1px) 0 50%/100% 50%,
    linear-gradient(90deg, var(--hairline-2) 1px, transparent 1px) 50% 0/50% 100%,
    var(--washi-2);
}
.drawer__paper svg { position: absolute; inset: 7%; width: 86%; height: 86%; }
.drawer__paper svg path {
  fill: none; stroke: var(--sumi); stroke-width: 6;
  stroke-linecap: round; stroke-linejoin: round; vector-effect: non-scaling-stroke;
}
.drawer__paper svg path.ghost { stroke: var(--hairline); }
.scrim {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(12,10,8,.34);
  opacity: 0; pointer-events: none; transition: opacity .35s;
  backdrop-filter: blur(2px);
}
.scrim.on { opacity: 1; pointer-events: auto; }

/* ---------- kana chart --------------------------------------------------- */

.kana { display: grid; grid-template-columns: 1.6rem repeat(5, 1fr); gap: .4rem; max-width: 640px; }
.kana__hd {
  font-family: var(--sans); font-size: .66rem; letter-spacing: .1em;
  color: var(--ink-faint); display: grid; place-items: center; text-transform: uppercase;
}
.kana__c {
  aspect-ratio: 1; border-radius: 9px;
  border: 1px solid var(--hairline); background: var(--paper);
  display: grid; place-items: center; align-content: center;
  transition: all .25s var(--ease-out);
}
.kana__c b { font-family: var(--mincho); font-size: 1.5rem; font-weight: 400; color: var(--sumi); line-height: 1; }
.kana__c span { font-family: var(--mono); font-size: .6rem; color: var(--ink-faint); }
.kana__c:hover { transform: translateY(-2px); border-color: var(--shu); box-shadow: var(--shadow-1); }
.kana__c.blank { border-color: transparent; background: transparent; pointer-events: none; }
.kana__c.on { background: var(--sumi); border-color: var(--sumi); }
.kana__c.on b { color: var(--paper); }
.kana__c.on span { color: rgba(246,242,234,.55); }

/* ---------- pitch drill -------------------------------------------------- */

.eartest { display: grid; gap: 1rem; justify-items: center; text-align: center; padding-block: 1rem; }
.eartest__opts { display: flex; gap: .6rem; flex-wrap: wrap; justify-content: center; }
.eopt {
  border: 1px solid var(--hairline); border-radius: var(--r-m);
  padding: .9rem 1.4rem; background: var(--paper);
  display: grid; gap: .1rem; min-width: 130px;
  transition: all .22s var(--ease);
}
.eopt:hover { transform: translateY(-2px); border-color: var(--shu); box-shadow: var(--shadow-1); }
.eopt b { font-family: var(--mincho); font-size: 1.4rem; font-weight: 400; color: var(--sumi); }
.eopt span { font-size: .76rem; color: var(--ink-faint); }
.eopt.right { border-color: var(--ok); background: color-mix(in srgb, var(--ok) 10%, var(--paper)); }
.eopt.wrong { border-color: var(--shu); background: var(--shu-soft); }

/* ---------- reader (app) ------------------------------------------------- */

.rlist { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px,1fr)); gap: .7rem; margin-bottom: 1.6rem; }
.rcard {
  border: 1px solid var(--hairline); border-radius: var(--r-m);
  background: var(--paper); padding: 1rem 1.1rem;
  display: grid; gap: .4rem; text-align: left; align-content: start;
  transition: all .3s var(--ease-out);
}
.rcard:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.rcard.on { border-color: var(--sumi); box-shadow: var(--shadow-2); }
.rcard b { font-family: var(--mincho); font-size: 1.1rem; font-weight: 400; color: var(--sumi); }
.rcard span { font-size: .8rem; color: var(--ink-faint); }
.rcard p { font-size: .8rem; color: var(--ink-soft); line-height: 1.5; }

/* ---------- misc --------------------------------------------------------- */

.empty {
  display: grid; gap: .8rem; justify-items: center; text-align: center;
  padding: clamp(2.4rem, 8vw, 5rem) 1rem; color: var(--ink-soft);
}
.empty .seal { width: 3rem; height: 3rem; font-size: 1.3rem; opacity: .9; }

.toast {
  position: fixed; bottom: 1.4rem; left: 50%; transform: translate(-50%, 12px);
  z-index: 300;
  background: var(--panel); color: var(--onink);
  border: 1px solid var(--panel-bd);
  padding: .7rem 1.15rem; border-radius: 100px;
  font-family: var(--sans); font-size: .82rem;
  box-shadow: var(--shadow-3);
  opacity: 0; pointer-events: none;
  transition: opacity .28s, transform .28s var(--ease-out);
}
.toast.on { opacity: 1; transform: translate(-50%, 0); }

.split { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,340px); gap: 1.2rem; align-items: start; }
@media (max-width: 1000px) { .split { grid-template-columns: minmax(0, 1fr); } }
.panel, .tile { min-width: 0; }

.kv { display: grid; gap: .55rem; }
.kv div { display: flex; justify-content: space-between; gap: 1rem; font-size: .86rem; padding-bottom: .5rem; border-bottom: 1px dashed var(--hairline-2); }
.kv dt { color: var(--ink-faint); }
.kv dd { color: var(--sumi); text-align: right; }