:root {
  --navy: #2F3E5C; --navy-2: #43547a; --ink: #1F2A44; --muted: #5d6680; --line: #dfe3ec;
  --bg: #f6f7fb; --card: #ffffff;
  --friendship: #F25C54; --knowledge: #3A86FF; --skill: #2AA866; --spirit: #EC6BB2; --serve: #FF9F1C;
  --ok: #1f8a4c; --warn: #b26a00; --bad: #c0392b;
  --radius: 12px; --head: 'Montserrat', 'Segoe UI', sans-serif; --body: 'Source Sans 3', 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font-family: var(--body); font-size: 17px; line-height: 1.55; color: var(--ink); background: var(--bg); }
h1, h2, h3 { font-family: var(--head); color: var(--navy); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-weight: 800; font-size: clamp(1.7rem, 4vw, 2.4rem); }
h2 { font-weight: 800; font-size: 1.4rem; margin-top: 1.4em; }
h3 { font-weight: 600; font-size: 1.1rem; }
a { color: var(--knowledge); }
img { max-width: 100%; }
.small { font-size: .85rem; color: var(--muted); }
.muted { color: var(--muted); }
.loading { padding: 3rem; text-align: center; color: var(--muted); }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 1rem; padding: .6rem 1.2rem; background: var(--navy); color: #fff; }
.brand { display: flex; align-items: center; gap: .6rem; color: #fff; text-decoration: none; font-family: var(--head); font-weight: 800; font-size: 1rem; }
.brand img { width: 36px; height: 36px; background: #fff; border-radius: 50%; padding: 2px; }
.nav { display: flex; gap: .2rem; margin-left: auto; flex-wrap: wrap; align-items: center; }
.nav a, .nav button.linklike { color: #e8ecf6; text-decoration: none; padding: .45rem .7rem; border-radius: 8px; font-size: .95rem; background: none; border: 0; cursor: pointer; font-family: var(--body); }
.nav a:hover, .nav a.active, .nav button.linklike:hover { background: rgba(255,255,255,.14); color: #fff; }
.nav .cta { background: var(--serve); color: var(--ink); font-weight: 600; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid rgba(255,255,255,.4); color: #fff; font-size: 1.3rem; border-radius: 8px; padding: .2rem .6rem; }
@media (max-width: 860px) {
  .menu-btn { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--navy); flex-direction: column; align-items: stretch; padding: .5rem; }
  .nav.open { display: flex; }
}
#demo-bar { background: #fff4d6; border-bottom: 1px solid #f0d590; padding: .45rem 1rem; font-size: .9rem; display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
#demo-bar select { font: inherit; padding: .15rem .3rem; }

/* layout */
main { max-width: 1120px; margin: 0 auto; padding: 1.5rem 1.2rem 3rem; outline: none; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.grid-2 { display: grid; gap: 1.2rem; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); }
@media (max-width: 860px) { .grid-2 { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; }
.card h3 { margin-top: 0; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
.stack > * + * { margin-top: .8rem; }

/* hero */
.hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 2rem; align-items: center; padding: 1rem 0 2rem; }
.hero img { max-width: 340px; width: 100%; justify-self: center; }
.hero .lead { font-size: 1.2rem; color: var(--muted); }
@media (max-width: 760px) { .hero { grid-template-columns: 1fr; } .hero img { max-width: 220px; } }

/* buttons & forms */
.btn { display: inline-flex; align-items: center; gap: .4rem; font: 600 .95rem var(--body); padding: .6rem 1rem; border-radius: 10px; border: 1px solid var(--navy); background: #fff; color: var(--navy); cursor: pointer; text-decoration: none; }
.btn:hover { background: #eef1f8; }
.btn.primary { background: var(--navy); color: #fff; }
.btn.primary:hover { background: var(--navy-2); }
.btn.warm { background: var(--serve); border-color: var(--serve); color: var(--ink); }
.btn.danger { border-color: var(--bad); color: var(--bad); }
.btn.small { padding: .3rem .6rem; font-size: .85rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
label { display: block; font-weight: 600; margin: .8rem 0 .25rem; }
input[type=text], input[type=email], input[type=date], select, textarea { width: 100%; font: inherit; padding: .55rem .7rem; border: 1px solid #c9cfdc; border-radius: 8px; background: #fff; }
textarea { min-height: 110px; resize: vertical; }
.check { display: flex; gap: .5rem; align-items: flex-start; font-weight: 400; }
.check input { margin-top: .35rem; }
.form-error { color: var(--bad); font-size: .9rem; margin-top: .3rem; }
.notice { border-left: 4px solid var(--knowledge); background: #eef4ff; padding: .8rem 1rem; border-radius: 0 8px 8px 0; }
.notice.warn { border-color: var(--serve); background: #fff6e8; }
.notice.ok { border-color: var(--ok); background: #eaf7ef; }

/* pillars */
.pill { display: inline-block; font-size: .78rem; font-weight: 600; padding: .12rem .55rem; border-radius: 999px; color: #fff; }
.p-Friendship { background: var(--friendship); } .p-Knowledge { background: var(--knowledge); } .p-Skill { background: var(--skill); }
.p-Spirit { background: var(--spirit); } .p-Serve { background: var(--serve); color: var(--ink); }
.b-Friendship { border-top: 5px solid var(--friendship); } .b-Knowledge { border-top: 5px solid var(--knowledge); } .b-Skill { border-top: 5px solid var(--skill); }
.b-Spirit { border-top: 5px solid var(--spirit); } .b-Serve { border-top: 5px solid var(--serve); }
.tag { display: inline-block; font-size: .78rem; padding: .1rem .5rem; border-radius: 6px; background: #eef1f8; color: var(--navy); }
.tag.pending { background: #fff1d6; color: var(--warn); } .tag.ok { background: #e2f5ea; color: var(--ok); } .tag.bad { background: #fde8e6; color: var(--bad); }

/* levels strip */
.levels { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: .6rem; }
.levels .lv { border-radius: 10px; padding: .8rem; color: #fff; }
.levels .lv b { display: block; font-family: var(--head); }
.levels .lv.locked { opacity: .55; }
@media (max-width: 760px) { .levels { grid-template-columns: 1fr 1fr; } }

/* session list */
.session-row { display: flex; gap: .9rem; align-items: center; padding: .7rem .9rem; background: #fff; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; color: var(--ink); }
.session-row:hover { border-color: var(--navy-2); }
.session-row .num { font-family: var(--head); font-weight: 800; color: var(--muted); width: 2.2rem; }
.session-row .t { flex: 1; font-weight: 600; }
.session-row .meta { font-size: .85rem; color: var(--muted); }
.list > * + * { margin-top: .45rem; }
.filters { display: flex; gap: .4rem; flex-wrap: wrap; margin: .6rem 0 1rem; }
.filters button { font: inherit; font-size: .9rem; border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: .3rem .8rem; cursor: pointer; }
.filters button.on { background: var(--navy); color: #fff; border-color: var(--navy); }

/* slide viewer */
.viewer { background: #111827; border-radius: var(--radius); overflow: hidden; }
.viewer img { display: block; width: 100%; aspect-ratio: 16/9; object-fit: contain; background: #111827; }
.viewer .ctrl { display: flex; align-items: center; justify-content: space-between; padding: .4rem .6rem; color: #e5e7eb; font-size: .9rem; }
.viewer .ctrl button { background: rgba(255,255,255,.12); color: #fff; border: 0; border-radius: 8px; padding: .35rem .8rem; cursor: pointer; font: inherit; }
.thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: .35rem; margin-top: .5rem; }
.thumbs img { width: 100%; border-radius: 4px; cursor: pointer; border: 2px solid transparent; }
.thumbs img.on { border-color: var(--serve); }
.facts dt { font-weight: 600; color: var(--muted); font-size: .85rem; margin-top: .6rem; }
.facts dd { margin: 0; }
.tabs { display: flex; gap: .3rem; border-bottom: 1px solid var(--line); margin-top: 1.5rem; flex-wrap: wrap; }
.tabs button { font: 600 .95rem var(--body); border: 0; background: none; padding: .55rem .9rem; cursor: pointer; color: var(--muted); border-bottom: 3px solid transparent; }
.tabs button.on { color: var(--navy); border-color: var(--serve); }

/* rendered markdown */
.md table { border-collapse: collapse; width: 100%; margin: .8rem 0; font-size: .93rem; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--line); padding: .4rem .55rem; text-align: left; vertical-align: top; }
.md th { background: #eef1f8; }
.md blockquote { margin: .8rem 0; padding: .6rem 1rem; border-left: 4px solid var(--serve); background: #fffaf0; }
.md h1 { font-size: 1.5rem; }
.md ul li input[type=checkbox] { margin-right: .4rem; }

/* tables */
table.data { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
table.data th, table.data td { padding: .55rem .7rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: .95rem; }
table.data th { background: #eef1f8; font-size: .85rem; color: var(--muted); }
.table-wrap { overflow-x: auto; }

/* student class page */
.student main { max-width: 900px; }
.student .topbar .nav { display: none; }

/* footer */
.footer { text-align: center; padding: 2rem 1rem; color: var(--muted); }
.footer .small { max-width: 760px; margin: .5rem auto 0; }
.pillar-strip { display: flex; max-width: 220px; height: 6px; margin: 0 auto 1rem; border-radius: 3px; overflow: hidden; }
.pillar-strip span { flex: 1; } .pillar-strip span:nth-child(1) { background: var(--friendship); } .pillar-strip span:nth-child(2) { background: var(--knowledge); }
.pillar-strip span:nth-child(3) { background: var(--skill); } .pillar-strip span:nth-child(4) { background: var(--spirit); } .pillar-strip span:nth-child(5) { background: var(--serve); }

#toast { position: fixed; bottom: 1.2rem; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: .6rem 1rem; border-radius: 10px; opacity: 0; transition: opacity .2s; pointer-events: none; z-index: 50; }
#toast.show { opacity: 1; }
@media print { .topbar, .footer, #demo-bar, .no-print { display: none !important; } main { padding: 0; } }

.brand span { display: flex; flex-direction: column; line-height: 1.1; }
.brand small { font-family: var(--body); font-weight: 400; font-size: .72rem; opacity: .85; }
.kicker { font-family: var(--head); font-weight: 800; color: var(--serve); letter-spacing: .04em; text-transform: uppercase; font-size: .9rem; margin: 0 0 .4rem; }