/* ===== Kyoto wa-modern theme ===== */
:root {
  --kinari: #f4eee2;        /* page: unbleached paper */
  --washi: #fffcf6;         /* surface */
  --washi-2: #f8f2e7;
  --sumi: #22232b;          /* ink */
  --usuzumi: #6c6a72;       /* light ink */
  --line: #e3d8c4;
  --line-2: #efe7d8;
  --ai: #1b2440;            /* indigo */
  --ai-2: #2c3a63;
  --ai-soft: #e6e9f2;
  --shu: #b5442c;           /* vermilion */
  --shu-soft: #f6e3dc;
  --kin: #a8864a;           /* muted gold */
  --kin-soft: #f3ead6;
  --matcha: #5b7a4a;
  --matcha-soft: #e7eedf;
  --yamabuki: #b07a12;
  --yamabuki-soft: #f8edd3;
  --beni: #a8322a;
  --beni-soft: #f7e1de;
  --radius: 10px;
  --shadow: 0 1px 0 rgba(60, 40, 10, .04), 0 10px 30px -18px rgba(40, 30, 10, .25);
  --serif: 'Cormorant Garamond', 'Shippori Mincho', serif;
  --mincho: 'Shippori Mincho', 'Cormorant Garamond', serif;
  --sans: 'Inter', 'Noto Sans JP', system-ui, sans-serif;
  --seigaiha: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='48' height='24' viewBox='0 0 48 24'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='.07' stroke-width='1'%3E%3Cpath d='M0 24a24 24 0 0 1 48 0M6 24a18 18 0 0 1 36 0M12 24a12 12 0 0 1 24 0M18 24a6 6 0 0 1 12 0'/%3E%3Cpath d='M-24 12a24 24 0 0 1 48 0M-18 12a18 18 0 0 1 36 0M-12 12a12 12 0 0 1 24 0M-6 12a6 6 0 0 1 12 0M24 12a24 24 0 0 1 48 0M30 12a18 18 0 0 1 36 0M36 12a12 12 0 0 1 24 0M42 12a6 6 0 0 1 12 0'/%3E%3C/g%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  :root {
    --kinari: #14161d; --washi: #1c1f28; --washi-2: #22252f; --sumi: #ece7dc; --usuzumi: #a29e95; --line: #343644; --line-2: #2a2c37;
    --ai: #0f1424; --ai-2: #8ea2d8; --ai-soft: #232a40; --shu: #e07a5f; --shu-soft: #3a231d; --kin: #c9a96a; --kin-soft: #2f2817;
    --matcha: #8fb47a; --matcha-soft: #1f2a1a; --yamabuki: #e0aa47; --yamabuki-soft: #33280f; --beni: #ef7d72; --beni-soft: #3a1e1c;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--kinari); color: var(--sumi); font: 15px/1.65 var(--sans); -webkit-font-smoothing: antialiased; font-variant-numeric: lining-nums; }
a { color: var(--ai-2); text-decoration: none; }
a:hover { color: var(--shu); }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; font-weight: 600; }
h1 { font-family: var(--serif); font-size: 2.2rem; letter-spacing: .005em; }
h2 { font-family: var(--serif); font-size: 1.35rem; }
h3 { font-size: 1rem; }
:lang(ja) h1, :lang(ja) h2 { font-family: var(--mincho); }
:lang(ja) h1 { font-size: 1.75rem; }
:lang(ja) h2 { font-size: 1.1rem; }
p { margin: 0 0 .8em; }
svg { width: 1.05em; height: 1.05em; vertical-align: -0.18em; flex: none; }
svg.chart { width: 100%; height: auto; }
.boot { min-height: 100vh; display: grid; place-items: center; }
.hanko { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 6px; background: var(--shu); color: #fff8ef; font-family: var(--mincho); font-weight: 700; font-size: 1.05rem; box-shadow: inset 0 0 0 2px rgba(255,255,255,.18); transform: rotate(-3deg); flex: none; }
.kicker { font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--kin); font-weight: 600; margin-bottom: 6px; }
:lang(ja) .kicker { letter-spacing: .1em; }
.serif { font-family: var(--serif); }
.mincho { font-family: var(--mincho); }
.jp { font-family: 'Noto Sans JP', var(--sans); }

/* ===== layout ===== */
.layout { display: grid; grid-template-columns: 248px 1fr; min-height: 100vh; }
.side { background: var(--ai) var(--seigaiha); color: #e9e4d8; padding: 22px 14px; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 2px; }
.brand { display: flex; gap: 12px; align-items: center; padding: 2px 10px 22px; }
.brand .name { font-family: var(--serif); font-size: 1.22rem; font-weight: 600; line-height: 1.1; color: #fff; }
.brand small { display: block; font-family: var(--sans); font-size: .66rem; letter-spacing: .18em; text-transform: uppercase; color: var(--kin); margin-top: 3px; }
.nav a { display: flex; align-items: center; gap: 11px; padding: 9px 12px; border-radius: 8px; color: #cfd3e0; font-weight: 500; font-size: .93rem; position: relative; }
.nav a svg { width: 18px; height: 18px; flex: none; opacity: .85; }
.nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav a.active { background: rgba(255,255,255,.1); color: #fff; }
.nav a.active::before { content: ''; position: absolute; left: -14px; top: 9px; bottom: 9px; width: 3px; border-radius: 0 3px 3px 0; background: var(--kin); }
.nav .count { margin-left: auto; background: var(--shu); color: #fff; border-radius: 99px; font-size: .7rem; min-width: 20px; text-align: center; padding: 0 6px; }
.nav .sep { height: 1px; background: rgba(255,255,255,.08); margin: 10px 12px; }
.side-foot { margin-top: auto; font-size: .74rem; color: #8e95ab; padding: 10px 12px; line-height: 1.5; }
.side-foot .ai-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #7fb069; margin-right: 6px; }
.side-foot .ai-dot.off { background: #8e95ab; }
.main { min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 14px; padding: 12px 32px; border-bottom: 1px solid var(--line); background: color-mix(in srgb, var(--kinari) 88%, transparent); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 5; }
.topbar .spacer { flex: 1; }
.iconbtn { width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; color: var(--sumi); position: relative; }
.iconbtn:hover { background: var(--washi-2); color: var(--sumi); }
.iconbtn svg { width: 20px; height: 20px; }
.iconbtn .dot { position: absolute; top: 4px; right: 3px; min-width: 16px; height: 16px; border-radius: 99px; background: var(--shu); color: #fff; font-size: .62rem; display: grid; place-items: center; padding: 0 4px; font-weight: 700; }
.content { padding: 32px; max-width: 1180px; width: 100%; }
.disclaimer { margin: auto 32px 24px; padding-top: 16px; border-top: 1px solid var(--line); font-size: .74rem; color: var(--usuzumi); max-width: 1116px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 22px; }
.page-head h1 { margin: 0; }
.page-head p { margin: 6px 0 0; color: var(--usuzumi); }
.crumbs { font-size: .82rem; color: var(--usuzumi); margin-bottom: 6px; }

/* ===== components ===== */
.card { background: var(--washi); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.card + .card { margin-top: 18px; }
.grid > .card, .grid > .card + .card, .how > .card + .card { margin-top: 0; }
.card-title { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.card-title h2 { margin: 0; }
.rule { display: flex; align-items: center; gap: 12px; color: var(--kin); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; font-weight: 600; margin: 28px 0 14px; }
.rule::after { content: ''; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); }
.grid { display: grid; gap: 18px; }
.grid > * { min-width: 0; }
.g2 { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); }
.g2e { grid-template-columns: 1fr 1fr; }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g5 { grid-template-columns: repeat(5, 1fr); }
.stack > * + * { margin-top: 18px; }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.between { justify-content: space-between; }
.muted { color: var(--usuzumi); }
.small { font-size: .86rem; }
.tiny { font-size: .76rem; }
.mono { font-variant-numeric: tabular-nums; }
.ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.btn { appearance: none; border: 1px solid var(--line); background: var(--washi); color: var(--sumi); border-radius: 8px; padding: 9px 16px; font: inherit; font-weight: 600; font-size: .9rem; cursor: pointer; display: inline-flex; gap: 8px; align-items: center; justify-content: center; transition: background .15s, border-color .15s, transform .05s; }
.btn svg { width: 16px; height: 16px; }
.btn { white-space: nowrap; }
.table td { white-space: normal; }
.btn:hover { background: var(--washi-2); color: var(--sumi); border-color: #d4c6ab; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--ai); border-color: var(--ai); color: #fff; }
.btn.primary:hover { background: var(--ai-2); border-color: var(--ai-2); color: #fff; }
.btn.shu { background: var(--shu); border-color: var(--shu); color: #fff; }
.btn.shu:hover { filter: brightness(1.06); color: #fff; }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.sm { padding: 5px 11px; font-size: .82rem; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.chip { display: inline-flex; align-items: center; gap: 5px; border-radius: 99px; padding: 1px 10px; font-size: .74rem; font-weight: 600; background: var(--washi-2); color: var(--usuzumi); border: 1px solid var(--line); white-space: nowrap; line-height: 1.7; }
.chip.ok { background: var(--matcha-soft); color: var(--matcha); border-color: transparent; }
.chip.warn { background: var(--yamabuki-soft); color: var(--yamabuki); border-color: transparent; }
.chip.danger { background: var(--beni-soft); color: var(--beni); border-color: transparent; }
.chip.info { background: var(--ai-soft); color: var(--ai-2); border-color: transparent; }
.chip.shu { background: var(--shu-soft); color: var(--shu); border-color: transparent; }
.chip.kin { background: var(--kin-soft); color: var(--kin); border-color: transparent; }
.bar { height: 6px; border-radius: 99px; background: var(--line-2); overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--ai-2); border-radius: 99px; transition: width .6s ease; }
.bar.ok > span { background: var(--matcha); }
.bar.kin > span { background: var(--kin); }
.bar.shu > span { background: var(--shu); }
.avatar { width: 46px; height: 46px; border-radius: 50%; background: var(--ai); color: #f3ead6; display: grid; place-items: center; font-weight: 600; flex: none; font-family: var(--mincho); box-shadow: 0 0 0 3px var(--washi), 0 0 0 4px var(--kin); }
.avatar.sm { width: 32px; height: 32px; font-size: .8rem; box-shadow: none; }
.avatar.lg { width: 64px; height: 64px; font-size: 1.3rem; }
.list { list-style: none; margin: 0; padding: 0; }
.list > li { padding: 12px 0; border-top: 1px solid var(--line-2); display: flex; gap: 14px; align-items: center; }
.list > li:first-child { border-top: 0; padding-top: 2px; }
.list .grow { flex: 1; min-width: 0; }
.num-jp { font-family: var(--mincho); color: var(--kin); width: 26px; text-align: center; font-size: 1.15rem; flex: none; }
.check { width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--line); display: grid; place-items: center; flex: none; color: transparent; }
.check svg { width: 12px; height: 12px; }
.check.on { background: var(--matcha); border-color: var(--matcha); color: #fff; }
.stat { padding: 18px 20px; }
.stat .num { font-family: var(--serif); font-size: 2.3rem; font-weight: 600; line-height: 1; }
.stat .num small { font-size: .9rem; color: var(--usuzumi); font-family: var(--sans); font-weight: 500; margin-left: 2px; }
.stat .lbl { color: var(--usuzumi); font-size: .8rem; margin-top: 6px; }
.stat.alert .num { color: var(--beni); }
.notice { padding: 12px 16px; border-radius: 8px; background: var(--ai-soft); color: var(--ai-2); font-size: .86rem; border-left: 3px solid var(--ai-2); }
.notice.warn { background: var(--yamabuki-soft); color: var(--yamabuki); border-color: var(--yamabuki); }
.notice.shu { background: var(--shu-soft); color: var(--shu); border-color: var(--shu); }
.empty { color: var(--usuzumi); padding: 20px 0; text-align: center; font-size: .9rem; }
.tag-ai { font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; color: var(--kin); font-weight: 700; }

/* ===== forms ===== */
label { display: block; font-weight: 600; font-size: .84rem; margin: 0 0 5px; }
input[type=text], input[type=email], input[type=number], textarea, select { width: 100%; border: 1px solid var(--line); background: var(--washi); color: var(--sumi); border-radius: 8px; padding: 10px 12px; font: inherit; transition: border-color .15s, box-shadow .15s; }
textarea { min-height: 100px; resize: vertical; }
textarea.tall { min-height: 320px; line-height: 1.7; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--ai-2); box-shadow: 0 0 0 3px var(--ai-soft); }
.field + .field { margin-top: 14px; }
.hint { font-size: .76rem; color: var(--usuzumi); margin-top: 4px; }
.form-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; flex-wrap: wrap; }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg label { margin: 0; border: 1px solid var(--line); border-radius: 99px; padding: 6px 14px; font-weight: 500; cursor: pointer; background: var(--washi); }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) { background: var(--ai); color: #fff; border-color: var(--ai); }

/* ===== hero (learner home) ===== */
.hero { position: relative; overflow: hidden; border-radius: 14px; background: var(--washi); border: 1px solid var(--line); min-height: 260px; box-shadow: var(--shadow); }
.hero .art { position: absolute; inset: 0; background: url('/img/hero.jpg') right center / cover no-repeat; }
.hero .art::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, var(--washi) 38%, color-mix(in srgb, var(--washi) 82%, transparent) 58%, transparent 88%); }
@media (max-width: 1200px) { .hero .art { background-position: 65% center; } .hero .art::after { background: linear-gradient(90deg, var(--washi) 50%, color-mix(in srgb, var(--washi) 85%, transparent) 72%, color-mix(in srgb, var(--washi) 30%, transparent) 100%); } }
.hero .inner { position: relative; padding: 30px 34px; max-width: 620px; }
.hero h1 { font-size: 2.6rem; margin: 2px 0 6px; }
.daycount { display: flex; align-items: baseline; gap: 10px; margin-top: 18px; }
.daycount .big { font-family: var(--serif); font-size: 4rem; line-height: .9; font-weight: 600; color: var(--ai); }
.daycount .of { color: var(--usuzumi); font-size: .9rem; }
.journey { position: relative; margin: 26px 0 4px; padding-top: 4px; }
.journey .track { position: absolute; left: 8px; right: 8px; top: 12px; height: 2px; background: var(--line); }
.journey .track span { display: block; height: 100%; background: var(--shu); }
.journey .stops { position: relative; display: flex; justify-content: space-between; }
.journey .stop { display: flex; flex-direction: column; align-items: center; gap: 6px; width: 18px; }
.journey .pin { width: 16px; height: 16px; border-radius: 50%; background: var(--washi); border: 2px solid var(--line); }
.journey .stop.done .pin { background: var(--shu); border-color: var(--shu); }
.journey .stop.now .pin { background: var(--washi); border-color: var(--shu); box-shadow: 0 0 0 4px var(--shu-soft); width: 18px; height: 18px; margin-top: -1px; }
.journey .stop.exam .pin { border-radius: 3px; transform: rotate(45deg) scale(.85); }
.journey .lbl { font-size: .66rem; color: var(--usuzumi); font-weight: 600; }
.journey .stop.now .lbl { color: var(--shu); }
.phases { display: flex; justify-content: space-between; font-size: .68rem; letter-spacing: .12em; text-transform: uppercase; color: var(--kin); margin-top: 8px; font-weight: 600; }

/* calendar */
.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; }
.cal span { aspect-ratio: 1; border-radius: 4px; background: var(--line-2); }
.cal span.on { background: var(--ai-2); }
.cal span.pre { background: transparent; border: 1px dashed var(--line-2); }
.cal span.today { outline: 2px solid var(--shu); outline-offset: 1px; }
.cal.wide { grid-template-columns: repeat(14, 1fr); }
.streak { font-family: var(--serif); font-size: 2.2rem; font-weight: 600; line-height: 1; color: var(--shu); }

/* ===== chat / thread ===== */
.chat { display: flex; flex-direction: column; gap: 12px; max-height: 520px; overflow-y: auto; padding: 4px 2px 10px; scroll-behavior: smooth; }
.msg { max-width: 88%; padding: 11px 15px; border-radius: 12px; background: var(--washi-2); border: 1px solid var(--line-2); overflow-wrap: anywhere; }
.msg.me { align-self: flex-end; background: var(--ai); color: #f1efe8; border-color: transparent; border-bottom-right-radius: 4px; }
.msg.me .meta { color: #b8bfd6; }
.msg.them { border-bottom-left-radius: 4px; }
.msg.sys { align-self: center; background: var(--ai-soft); color: var(--ai-2); border: 0; font-size: .84rem; text-align: center; }
.msg .meta { font-size: .72rem; color: var(--usuzumi); margin-bottom: 4px; display: flex; gap: 6px; align-items: center; }
.msg.staff { border-left: 3px solid var(--kin); }
.msg.thinking { color: var(--usuzumi); font-style: italic; }
.msg.thinking::after { content: '…'; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .2; } }
.thread .msg { max-width: 92%; }
.composer { display: flex; gap: 8px; margin-top: 12px; align-items: flex-end; }
.composer textarea { min-height: 50px; }
details.ctx { border: 1px dashed var(--line); border-radius: 8px; padding: 9px 13px; font-size: .86rem; background: var(--washi-2); }
details.ctx summary { cursor: pointer; color: var(--usuzumi); }

/* ===== course ===== */
.phase-title { font-family: var(--serif); font-size: 1.25rem; margin: 26px 0 10px; display: flex; align-items: center; gap: 10px; }
.phase-title:first-of-type { margin-top: 0; }
.phase-title .kanji { font-family: var(--mincho); color: var(--kin); font-size: 1rem; }
.week { border: 1px solid var(--line); border-radius: var(--radius); background: var(--washi); }
.week + .week { margin-top: 8px; }
.week summary { list-style: none; cursor: pointer; padding: 14px 20px; display: flex; align-items: center; gap: 16px; }
.week summary::-webkit-details-marker { display: none; }
.week .wk { font-family: var(--serif); font-size: 1.15rem; font-weight: 600; width: 70px; flex: none; color: var(--ai-2); }
.week .body { padding: 0 20px 14px 106px; }
.week.current { border-color: var(--shu); box-shadow: 0 0 0 1px var(--shu); }
.lesson-video { aspect-ratio: 16/9; border-radius: 12px; background: #141a2e url('/img/hero.jpg') center/cover; position: relative; overflow: hidden; display: grid; place-items: center; text-align: center; color: #f2ede2; }
.lesson-video::before { content: ''; position: absolute; inset: 0; background: rgba(18, 22, 40, .62); }
.lesson-video > div { position: relative; }
.lesson-video .play { width: 72px; height: 72px; border-radius: 50%; border: 1.5px solid rgba(255,255,255,.6); display: grid; place-items: center; margin: 0 auto 12px; }
.lesson-video .play svg { width: 26px; height: 26px; margin-left: 4px; }

/* ===== quiz ===== */
.q { padding: 20px 0; border-top: 1px solid var(--line-2); }
.q:first-child { border-top: 0; padding-top: 4px; }
.q .prompt { font-size: 1.2rem; margin-bottom: 12px; font-family: var(--mincho); }
.choices { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.choice { border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; cursor: pointer; display: flex; gap: 10px; align-items: center; font-family: 'Noto Sans JP', var(--sans); font-weight: 400; margin: 0; font-size: 1rem; background: var(--washi); transition: border-color .15s, background .15s; }
.choice:hover { border-color: #cdbd9d; }
.choice input { accent-color: var(--ai); }
.choice:has(input:checked) { border-color: var(--ai-2); background: var(--ai-soft); }
.choice.right, .choice.right:has(input:checked) { border-color: var(--matcha); background: var(--matcha-soft); }
.choice.wrong, .choice.wrong:has(input:checked) { border-color: var(--beni); background: var(--beni-soft); }
.explain { margin-top: 10px; font-size: .9rem; color: var(--usuzumi); padding-left: 12px; border-left: 2px solid var(--kin); }
.quiz-progress { position: sticky; top: 63px; z-index: 3; background: var(--kinari); padding: 8px 0 12px; }
.score-banner { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.score-banner .big { font-family: var(--serif); font-size: 3.4rem; font-weight: 600; line-height: 1; color: var(--ai); }

/* ===== notebook ===== */
.mistake { padding: 18px 0; border-top: 1px solid var(--line-2); display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; }
.mistake:first-child { border-top: 0; }
.mistake .prompt { font-family: var(--mincho); font-size: 1.12rem; }
.mistake .ans { font-size: .9rem; }
.mistake .ans s { color: var(--beni); }
.mistake .ans strong { color: var(--matcha); }

/* ===== tables ===== */
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th { text-align: left; font-size: .72rem; color: var(--usuzumi); font-weight: 600; padding: 8px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; letter-spacing: .04em; }
.table td { padding: 12px; border-bottom: 1px solid var(--line-2); vertical-align: top; }
.table tr:last-child td { border-bottom: 0; }
.table tr.click { cursor: pointer; }
.table tr.click:hover td { background: var(--washi-2); }
.table-wrap { overflow-x: auto; margin: 0 -6px; }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.tabs a { padding: 9px 14px; color: var(--usuzumi); font-weight: 600; border-bottom: 2px solid transparent; margin-bottom: -1px; font-size: .9rem; }
.tabs a.active { color: var(--shu); border-color: var(--shu); }
.tabs a:hover { color: var(--sumi); }
.dist { display: flex; height: 26px; border-radius: 6px; overflow: hidden; }
.dist span { display: grid; place-items: center; color: #fff; font-size: .72rem; font-weight: 600; min-width: 0; }

/* ===== public pages (sign in, level check, welcome) ===== */
.public { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(380px, .9fr); }
.public .art { background: url('/img/hero.jpg') 70% center / cover no-repeat; position: relative; }
.public .art::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(27, 36, 64, .55)); }
.public .art .caption { position: absolute; left: 36px; bottom: 32px; z-index: 1; color: #fff; max-width: 420px; }
.public .art .caption .serif { font-size: 2rem; line-height: 1.15; }
.public .panel { padding: 48px 44px; display: flex; flex-direction: column; justify-content: center; gap: 18px; background: var(--kinari); }
.public .panel .inner { max-width: 440px; width: 100%; margin: 0 auto; }
.demo-accounts { display: grid; gap: 6px; }
.account { text-align: left; border: 1px solid var(--line); background: var(--washi); border-radius: 8px; padding: 9px 12px; cursor: pointer; display: flex; gap: 10px; align-items: center; font: inherit; color: inherit; width: 100%; }
.account:hover { border-color: var(--kin); }
.account .avatar { width: 30px; height: 30px; font-size: .78rem; box-shadow: none; }
details.dev { border-top: 1px solid var(--line); padding-top: 14px; }
details.dev summary { cursor: pointer; font-size: .82rem; color: var(--usuzumi); font-weight: 600; }
.page-narrow { max-width: 820px; margin: 0 auto; padding: 40px 24px 60px; }
.banner { border-radius: 14px; min-height: 220px; background: url('/img/finish.jpg') center 60% / cover; position: relative; overflow: hidden; display: flex; align-items: flex-end; padding: 28px 30px; color: #fff; }
.banner::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(27, 36, 64, .72)); }
.banner > * { position: relative; }
.banner h1 { color: #fff; margin: 0; font-size: 2.6rem; }
.steps { display: flex; gap: 8px; margin-bottom: 24px; }
.steps span { flex: 1; height: 3px; border-radius: 3px; background: var(--line); }
.steps span.on { background: var(--shu); }
.how { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.how .card { padding: 16px 18px; }
.how .ico { width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; background: var(--ai-soft); color: var(--ai-2); margin-bottom: 8px; }
.how .ico svg { width: 18px; height: 18px; }
.cert { border: 1px solid var(--kin); outline: 1px solid var(--kin); outline-offset: 5px; border-radius: 4px; padding: 34px; text-align: center; background: var(--washi); margin: 10px 6px; position: relative; }
.cert .hanko { position: absolute; right: 30px; bottom: 26px; width: 52px; height: 52px; font-size: 1.5rem; }
.vs { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 20px; text-align: center; }
.vs .big { font-family: var(--serif); font-size: 3.6rem; font-weight: 600; line-height: 1; }
.vs .arrow { color: var(--kin); font-size: 1.6rem; }
.email { border: 1px solid var(--line); border-radius: 8px; background: var(--washi); }
.email header { padding: 12px 16px; border-bottom: 1px solid var(--line-2); display: flex; gap: 10px; flex-wrap: wrap; align-items: baseline; }
.email .body { padding: 14px 16px; white-space: pre-wrap; font-size: .9rem; }
.email + .email { margin-top: 12px; }

#toast { position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--ai); color: #f3ead6; padding: 11px 18px; border-radius: 8px; opacity: 0; transition: .25s; pointer-events: none; z-index: 50; font-size: .9rem; max-width: 90vw; box-shadow: 0 10px 30px -10px rgba(0,0,0,.4); }
#toast.show { opacity: 1; transform: translateX(-50%); }
#toast.err { background: var(--beni); color: #fff; }

.chart text { fill: var(--usuzumi); font-size: 11px; font-family: var(--sans); }
.chart .grid-line { stroke: var(--line-2); }
.chart .line { stroke: var(--ai-2); fill: none; stroke-width: 2.25; }
.chart .area { fill: var(--ai-soft); opacity: .6; }
.chart .dot { fill: var(--washi); stroke: var(--ai-2); stroke-width: 2; }
.chart .exam { fill: var(--shu); }

.fade-in { }
@media (prefers-reduced-motion: reduce) { .fade-in { animation: none; } }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

@media (max-width: 1000px) {
  .g2, .g2e, .g3 { grid-template-columns: 1fr; }
  .g4, .g5 { grid-template-columns: repeat(2, 1fr); }
  .public { grid-template-columns: 1fr; }
  .public .art { min-height: 240px; }
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .side { position: fixed; bottom: 0; top: auto; left: 0; right: 0; height: auto; flex-direction: row; padding: 4px 6px calc(4px + env(safe-area-inset-bottom)); z-index: 10; background-image: none; }
  .brand, .side-foot, .nav .sep, .nav .no-sm { display: none; }
  .nav { display: flex; width: 100%; justify-content: space-around; }
  .nav a { flex-direction: column; gap: 2px; font-size: .64rem; padding: 6px 4px; }
  .nav a.active::before { display: none; }
  .nav .count { position: absolute; top: 0; right: 0; font-size: .6rem; min-width: 16px; }
  .topbar { padding: 10px 16px; }
  .content { padding: 18px 16px 96px; }
  .disclaimer { margin: 0 16px 96px; }
  .choices, .how { grid-template-columns: 1fr; }
  .hide-sm { display: none !important; }
  h1 { font-size: 1.8rem; }
  .hero .art::after { background: linear-gradient(180deg, color-mix(in srgb, var(--washi) 75%, transparent) 0%, var(--washi) 75%); }
  .hero .inner { padding: 22px 20px; }
  .hero h1 { font-size: 2rem; }
  .daycount .big { font-size: 3.2rem; }
  .journey .lbl, .phases { display: none; }
  .week .body { padding: 0 14px 12px; }
  .week summary { padding: 12px 14px; gap: 10px; }
  .week .wk { width: auto; }
  .public .panel { padding: 28px 20px; }
  .vs .big { font-size: 2.6rem; }
  .quiz-progress { top: 59px; }
}

/* ===== one study day: video → text → check test ===== */
ruby rt { font-size: .55em; color: var(--usuzumi); font-weight: 400; }
.no-furi ruby rt { visibility: hidden; }
.dots { display: inline-flex; gap: 4px; flex: none; }
.dots i { width: 8px; height: 8px; border-radius: 50%; border: 1.5px solid var(--line); }
.dots i.on { background: var(--matcha); border-color: var(--matcha); }
.legend { display: flex; gap: 18px; align-items: center; margin: -6px 0 16px; flex-wrap: wrap; }
.days li .dnum { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; flex: none; font: 600 .9rem var(--serif); color: var(--ai-2); background: var(--ai-soft); }
.days li .dnum.exam { background: var(--shu-soft); color: var(--shu); }
.days li .dnum svg { width: 14px; height: 14px; }
.days li.rev .dnum { background: var(--kin-soft); color: var(--kin); font-family: var(--mincho); font-size: .8rem; }
.days li.is-today { background: var(--kin-soft); border-radius: 8px; padding-left: 6px; padding-right: 6px; }
.days.compact li { padding: 6px 0; gap: 10px; }
.days.compact li .dnum { width: 24px; height: 24px; font-size: .78rem; }
.days.compact li.is-cur a { font-weight: 600; color: var(--shu); }
.today { border-color: var(--shu); box-shadow: 0 0 0 1px var(--shu-soft), var(--shadow); }
.daybadge { width: 64px; height: 64px; border-radius: 12px; background: var(--ai); color: #fff; display: flex; flex-direction: column; align-items: center; justify-content: center; flex: none; line-height: 1.05; }
.daybadge strong { font: 600 1.7rem var(--serif); }
.daybadge span { font-size: .66rem; letter-spacing: .08em; opacity: .8; text-transform: uppercase; }
.today-title { display: block; font: 600 1.25rem/1.4 var(--mincho); color: var(--sumi); margin-bottom: 8px; }
.steps-mini { display: flex; gap: 6px; flex-wrap: wrap; }
.steps-mini span { display: inline-flex; align-items: center; gap: 4px; font-size: .78rem; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--usuzumi); }
.steps-mini span svg { width: 11px; height: 11px; }
.steps-mini span.on { background: var(--matcha-soft); color: var(--matcha); border-color: transparent; }
.steps-mini span.now { border-color: var(--shu); color: var(--shu); font-weight: 600; }
.weekstrip { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin-top: 14px; }
.weekstrip a { border: 1px solid var(--line-2); border-radius: 8px; padding: 6px 4px; display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--usuzumi); }
.weekstrip a.cur { border-color: var(--shu); color: var(--shu); }
.weekstrip a.done { background: var(--matcha-soft); }
.weekstrip a.rev { background: var(--kin-soft); }
.weekstrip .dots i { width: 6px; height: 6px; }
.stepper { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; margin-bottom: 18px; }
.stepper a { display: flex; gap: 10px; align-items: center; padding: 10px 14px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--washi); color: var(--sumi); }
.stepper a > span:last-child { display: flex; flex-direction: column; line-height: 1.3; }
.stepper .n { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; flex: none; border: 1.5px solid var(--line); font: 600 .85rem var(--serif); }
.stepper .n svg { width: 12px; height: 12px; }
.stepper a.done .n { background: var(--matcha); border-color: var(--matcha); color: #fff; }
.stepper a.cur { border-color: var(--shu); box-shadow: 0 0 0 1px var(--shu); }
.stepper a.cur .n { border-color: var(--shu); color: var(--shu); }
.stepper a.cur.done .n { color: #fff; }
.day-grid { grid-template-columns: minmax(0, 1fr) 300px; align-items: start; }
@media (max-width: 900px) { .day-grid { grid-template-columns: 1fr; } }
.lesson-player { width: 100%; aspect-ratio: 16/9; border-radius: 12px; background: #000; display: block; }
.lead { font: 1.12rem/1.6 var(--mincho); margin: 6px 0 0; }
.outline { margin: 8px 0 0; padding-left: 1.3em; columns: 2; column-gap: 28px; font-size: .9rem; }
@media (max-width: 640px) { .outline { columns: 1; } }
.step-next { display: flex; justify-content: flex-end; }
.toc { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 4px; }
.toc a { font-size: .78rem; padding: 3px 10px; border-radius: 999px; background: var(--washi-2); color: var(--usuzumi); }
.tx-sec { padding: 20px 0 4px; border-top: 1px solid var(--line-2); margin-top: 16px; scroll-margin-top: 80px; }
.tx-sec h3 { margin: 0 0 8px; font: 600 1.1rem var(--mincho); }
.tx-sec p { margin: 0 0 10px; line-height: 1.85; }
.tx-table { overflow-x: auto; margin: 4px 0 12px; }
.tx-table table { border-collapse: collapse; width: 100%; font-size: .9rem; }
.tx-table th, .tx-table td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.tx-table th { background: var(--washi-2); font-weight: 600; }
.pairs { display: grid; gap: 10px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px; padding: 12px 14px; border: 1px solid var(--line-2); border-radius: 8px; background: var(--washi-2); }
.pair .note { grid-column: 1 / -1; color: var(--usuzumi); }
@media (max-width: 640px) { .pair { grid-template-columns: 1fr; } }
.jp.ng { color: var(--beni); }
.jp.ok { color: var(--matcha); }
.passage { font: 1.08rem/2 var(--mincho); padding: 14px 18px; border-left: 3px solid var(--kin); background: var(--kin-soft); border-radius: 0 8px 8px 0; margin: 6px 0 12px; }
.practice { padding-left: 1.4em; margin: 6px 0; }
.practice li { margin-bottom: 12px; }
.practice li > .jp { font-size: 1.02rem; }
.practice details summary { cursor: pointer; font-size: .8rem; color: var(--ai-2); margin-top: 4px; }
.practice .ans { padding: 6px 0 0 2px; }
.recap h3 { font: 600 1rem var(--mincho); margin: 14px 0 6px; }
.recap h3:first-child { margin-top: 0; }
.recap ul { margin: 0; padding-left: 1.2em; }
.recap li { margin-bottom: 6px; }
.recap .ex, .recap .mis { list-style: none; padding: 0; }
.recap .mis li { padding: 8px 0; border-top: 1px solid var(--line-2); }
.weekstrip .tiny { white-space: nowrap; font-size: .7rem; }
/* ask: pick the lesson first (D-089), answers after a short wait (D-093) */
.composer.stacked { flex-direction: column; align-items: stretch; }
.composer.stacked .row textarea { flex: 1; }
.unit-pick { display: flex; flex-direction: column; gap: 4px; }
.unit-pick select { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--washi); color: var(--sumi); max-width: 100%; }
.msg.pending { border-style: dashed; }
.dots-wait { display: inline-flex; gap: 3px; vertical-align: middle; margin-right: 4px; }
.dots-wait i { width: 5px; height: 5px; border-radius: 50%; background: var(--usuzumi); animation: dw 1.2s infinite ease-in-out; }
.dots-wait i:nth-child(2) { animation-delay: .2s; } .dots-wait i:nth-child(3) { animation-delay: .4s; }
@keyframes dw { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .dots-wait i { animation: none; } }

/* ===================================================================
   Two layouts (2026-11-10): PC (wider than 900px) and phone (900px or less).
   =================================================================== */

/* ---------- PC ---------- */
@media (min-width: 901px) {
  .content { max-width: 1560px; margin: 0 auto; padding: 32px 40px; }
  .disclaimer { max-width: 1480px; margin-left: auto; margin-right: auto; width: calc(100% - 80px); }
  .topbar { padding: 12px 40px; }
  .hero { min-height: 240px; }
  .day-grid { grid-template-columns: minmax(0, 1fr) 340px; gap: 24px; }
  /* keep long reading text at a comfortable line length */
  .tx-sec p, .tx-sec .passage, .recap ul, .lead { max-width: 74ch; }
  .day-grid aside { position: sticky; top: 76px; }
}
/* narrow PC / tablet landscape: slimmer sidebar */
@media (min-width: 901px) and (max-width: 1180px) {
  .layout { grid-template-columns: 212px 1fr; }
  .content { padding: 26px 24px; }
  .g2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}
/* wide PC: use the width */
@media (min-width: 1500px) {
  .layout { grid-template-columns: 264px 1fr; }
  .g2 { grid-template-columns: minmax(0, 1.7fr) minmax(360px, 1fr); gap: 24px; }
  .grid { gap: 24px; }
  .stack > * + * { margin-top: 24px; }
  .hero h1 { font-size: 3rem; }
  .hero .inner { max-width: 760px; padding: 36px 44px; }
  .day-grid { grid-template-columns: minmax(0, 1fr) 380px; }
  .week .body { padding-left: 120px; }
}

/* ---------- phone ---------- */
@media (max-width: 900px) {
  body { font-size: 15px; }
  .content { padding: 14px 14px 96px; }
  .card { padding: 16px; border-radius: 12px; }
  .card + .card, .stack > * + * { margin-top: 12px; }
  .grid { gap: 12px; }
  .page-head { margin-bottom: 14px; }
  h1, .page-head h1 { font-size: 1.55rem; line-height: 1.3; }
  h2 { font-size: 1.2rem; }

  /* home: compact header, today's lesson right under it */
  .hero { min-height: 0; border-radius: 12px; }
  .hero .inner { padding: 16px 18px; }
  .hero h1 { font-size: 1.5rem; margin: 0 0 2px; }
  .hero .kicker { margin-bottom: 2px; }
  .daycount { margin-top: 8px; }
  .daycount .big { font-size: 2.3rem; }
  .journey { margin: 12px 0 0; }
  .journey .pin { width: 12px; height: 12px; }
  .journey .stop.now .pin { width: 14px; height: 14px; }
  .journey .track { top: 10px; }
  .today .row { flex-wrap: nowrap; align-items: center; gap: 12px; }
  .daybadge { width: 52px; height: 52px; border-radius: 10px; }
  .daybadge strong { font-size: 1.35rem; }
  .today-title { font-size: 1.08rem; margin-bottom: 6px; }
  .steps-mini span { font-size: .72rem; padding: 2px 8px; }
  .weekstrip { gap: 4px; }
  .weekstrip a { padding: 5px 2px; }
  .cal { grid-template-columns: repeat(7, 26px); gap: 4px; }
  .cal.wide { grid-template-columns: repeat(14, 1fr); }
  .card-title { margin-bottom: 10px; }

  /* lists: text on top, button below when it doesn't fit */
  .list li { gap: 10px; }

  /* one day: steps as one compact row, sidebar after the content */
  .stepper { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 6px; margin-bottom: 12px; }
  .stepper a { flex-direction: column; gap: 4px; padding: 8px 4px; text-align: center; align-items: center; }
  .stepper a > span:last-child { align-items: center; }
  .stepper a .tiny { display: none; }
  .stepper strong { font-size: .8rem; line-height: 1.2; }
  .stepper .n { width: 22px; height: 22px; font-size: .75rem; }
  .crumbs { display: none; }
  .lesson-video, .lesson-player { border-radius: 10px; }
  .outline { columns: 1; }
  .toc { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
  .toc a { white-space: nowrap; }
  .tx-sec { padding-top: 14px; margin-top: 12px; }
  .tx-sec p { line-height: 1.8; }
  .tx-table table { font-size: .84rem; }
  .tx-table th, .tx-table td { padding: 6px 8px; }
  .pair { grid-template-columns: 1fr; padding: 10px 12px; }
  .passage { padding: 12px 14px; font-size: 1rem; }
  .step-next { position: sticky; bottom: 70px; z-index: 3; }
  .step-next .btn { width: 100%; justify-content: center; box-shadow: 0 6px 18px -8px rgba(0,0,0,.35); }
  .q .prompt { font-size: 1.08rem; }

  /* course */
  .week summary { flex-wrap: wrap; }
  .days li .dnum { width: 26px; height: 26px; font-size: .8rem; }

  /* ask */
  .chat { max-height: 58vh; }
  .msg { max-width: 94%; }
  .composer.stacked .row { flex-wrap: nowrap; }
  .composer textarea { min-height: 44px; }
}
/* calendar squares: small and even on every screen */
.cal:not(.wide) { grid-template-columns: repeat(7, minmax(0, 30px)); gap: 5px; }
@media (max-width: 900px) { .cal:not(.wide) { grid-template-columns: repeat(7, 26px); gap: 4px; } }
/* listening questions */
.q-audio { display: flex; flex-direction: column; gap: 4px; margin: 6px 0 10px; }
.q-audio audio { width: 100%; max-width: 480px; }
.q-script { margin-top: 8px; font-size: .9rem; }
.q-script summary { cursor: pointer; color: var(--ai-2); font-size: .82rem; }
.q-script .spk { display: inline-block; min-width: 1.6em; font-weight: 600; color: var(--kin); margin-right: 6px; }
/* Markdown course text (① N4) */
.tx-sec.md h4 { font: 600 1rem var(--mincho); margin: 14px 0 6px; }
.tx-sec.md ol, .tx-sec.md ul { padding-left: 1.4em; margin: 4px 0 10px; }
.tx-sec.md li { margin-bottom: 4px; }
.tx-sec.md em { color: var(--usuzumi); }
.tx-sec.md code { font-size: .88em; background: var(--washi-2); padding: 1px 4px; border-radius: 4px; }
.tx-sec.md .md-details { margin: 8px 0 12px; padding: 10px 14px; border: 1px dashed var(--line); border-radius: 8px; background: var(--washi-2); }
.tx-sec.md .md-details > summary { cursor: pointer; color: var(--ai-2); font-size: .86rem; font-weight: 600; }
.tx-sec .ng { color: var(--beni); font-weight: 700; }
.tx-sec .ok { color: var(--matcha); font-weight: 700; }
.review-text > summary { cursor: pointer; }