/* ============================================================
   สไตล์: มือถือเป็นหลัก (mobile-first) · โหมดสว่าง/ถนอมสายตา/กลางคืน
   ไม่ใช้ฟอนต์เว็บจากภายนอก เพื่อให้ทำงานออฟไลน์ได้เต็มที่
   ============================================================ */
:root {
  --fs: 1;
  --bg: #f7f3e8; --card: #fffdf6; --ink: #1f2a26; --muted: #66716b; --line: #e4dcc6;
  --pri: #0f6b57; --pri-ink: #ffffff; --pri-soft: #dcefe8; --acc: #b8892b;
  --ok: #1f7a4d; --ok-bg: #e0f3e8; --bad: #b3402f; --bad-bg: #f9e4df; --warn-bg: #fdf1d3;
  --map-bg: #eef3e8; --map-grid: #d6dcc9; --map-text: #28362f;
  --shadow: 0 2px 10px rgba(40, 50, 40, .10);
  --radius: 16px;
}
:root[data-theme="eye"] {
  --bg: #efe0bf; --card: #f6ead0; --ink: #3a2e1c; --muted: #75664a; --line: #dcc9a0;
  --pri: #5b6b34; --pri-soft: #e3e3bd; --acc: #94682a;
  --ok: #4d6b2e; --ok-bg: #e5e8c5; --bad: #9c4a30; --bad-bg: #f0d9c2; --warn-bg: #f3e1b3;
  --map-bg: #e8dcb8; --map-grid: #d4c394; --map-text: #3a2e1c;
  --shadow: 0 2px 8px rgba(70, 50, 20, .10);
}
:root[data-theme="night"] {
  --bg: #0f1a17; --card: #17251f; --ink: #e8e4d4; --muted: #9ba79f; --line: #27382f;
  --pri: #3fa88a; --pri-ink: #06201a; --pri-soft: #1d3a31; --acc: #d6a94a;
  --ok: #6fd1a0; --ok-bg: #173a2a; --bad: #f08a77; --bad-bg: #3a1f1a; --warn-bg: #3a3014;
  --map-bg: #15231e; --map-grid: #243630; --map-text: #d9e5dc;
  --shadow: 0 2px 10px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { font-size: calc(16px * var(--fs)); }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Sarabun", "Noto Sans Thai", "Leelawadee UI", "Tahoma", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.7; padding-bottom: calc(68px + env(safe-area-inset-bottom));
  transition: background .3s, color .3s;
}
h1, h2, h3, h4 { line-height: 1.35; margin: 0 0 .4em; }
h1 { font-size: 1.55rem; } h2 { font-size: 1.25rem; } h3 { font-size: 1.1rem; } h4 { font-size: 1rem; }
p { margin: 0 0 .8em; }
a { color: var(--pri); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
.muted { color: var(--muted); } .small { font-size: .85rem; } .center { text-align: center; }
:focus-visible { outline: 3px solid var(--acc); outline-offset: 2px; }
[hidden] { display: none !important; }

/* ---------- ส่วนหัว/เมนูล่าง ---------- */
.top {
  position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 10px;
  padding: calc(8px + env(safe-area-inset-top)) 14px 8px; background: var(--pri); color: var(--pri-ink);
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; flex: 1; text-decoration: none; color: inherit; }
.brand svg { width: 28px; height: 28px; }
.top .pill { background: rgba(255,255,255,.18); color: inherit; border: 0; }
.top .icon-btn { color: inherit; background: rgba(255,255,255,.18); }
.icon-btn { width: 36px; height: 36px; border-radius: 50%; border: 0; background: var(--pri-soft); display: inline-grid; place-items: center; font-size: 1rem; }
.pill { display: inline-flex; align-items: center; gap: 4px; padding: 3px 10px; border-radius: 999px; font-size: .8rem; background: rgba(0,0,0,.35); color: #fff; text-decoration: none; border: 0; }
.net.off { background: rgba(120,60,20,.5); }

.nav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 60; display: flex; justify-content: space-around;
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom)); background: var(--card); border-top: 1px solid var(--line);
}
.nav a { flex: 1; max-width: 120px; text-align: center; text-decoration: none; color: var(--muted); font-size: .75rem; padding: 4px 2px; border-radius: 12px; }
.nav a span { display: block; font-size: 1.3rem; line-height: 1.2; }
.nav a.on { color: var(--pri); background: var(--pri-soft); font-weight: 700; }

main { max-width: 760px; margin: 0 auto; padding: 14px; }
.sec { margin: 22px 0 10px; color: var(--pri); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); margin-bottom: 14px; }
.warn { background: var(--warn-bg); border-radius: 12px; padding: 10px 12px; font-size: .9rem; }
.note { color: var(--muted); font-size: .85rem; text-align: center; margin-top: 18px; }
.boot { padding: 40px 16px; text-align: center; color: var(--muted); }

/* ---------- ปุ่ม ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid transparent; padding: 10px 16px; border-radius: 12px; text-decoration: none; font-weight: 600; background: var(--pri-soft); color: var(--pri); }
.btn.primary { background: var(--pri); color: var(--pri-ink); }
.btn.soft { background: var(--pri-soft); color: var(--pri); }
.btn.ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn.danger { background: var(--bad-bg); color: var(--bad); }
.btn.big { padding: 13px 22px; font-size: 1.05rem; }
.btn.small { padding: 6px 12px; font-size: .85rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.actions { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.actions.wrap { flex-wrap: wrap; }
.pts { color: var(--ok); font-weight: 700; }

/* ---------- ชิป ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.chips.scroll { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; scrollbar-width: none; }
.chips.scroll::-webkit-scrollbar { display: none; }
.chip { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 3px 11px; font-size: .82rem; white-space: nowrap; color: var(--ink); }
.chip.dim { --c: var(--pri); border-color: color-mix(in srgb, var(--c) 45%, transparent); background: color-mix(in srgb, var(--c) 12%, var(--card)); }
.chip.dim.sel { background: var(--c); color: #fff; }
.chip.src { font-size: .78rem; }
.chip.t-q { border-color: #7a4f9a; } .chip.t-s { border-color: var(--ok); } .chip.t-h { border-color: #2f6f9f; }
.chip.t-r { border-color: var(--acc); } .chip.t-a { border-color: #a8553a; }
.srcs { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.srcs-l { font-size: .78rem; color: var(--muted); }

/* ---------- แถบความก้าวหน้า ---------- */
.bar { height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; margin: 6px 0; }
.bar i { display: block; height: 100%; background: var(--acc); border-radius: 99px; transition: width .4s; }

/* ---------- หน้าแรก ---------- */
.hero { position: relative; border-radius: 22px; overflow: hidden; margin-bottom: 8px; box-shadow: var(--shadow); color: #fff; }
.hero-art { position: absolute; inset: 0; } .hero-art svg { width: 100%; height: 100%; display: block; }
.hero-txt { position: relative; padding: 22px 18px; background: linear-gradient(180deg, rgba(5,40,32,.25), rgba(5,40,32,.78)); }
.hero .hello { margin: 0; opacity: .9; } .hero h1 { margin: 4px 0; text-shadow: 0 1px 6px rgba(0,0,0,.5); }
.hero .sub { opacity: .9; } .hero .score { margin: 12px 0 0; font-size: .9rem; } .hero .done-all { margin: 10px 0; }
.chapters { display: grid; gap: 12px; }
.chap { display: grid; grid-template-columns: 104px 1fr; border-radius: var(--radius); overflow: hidden; background: var(--card); border: 1px solid var(--line); text-decoration: none; color: var(--ink); box-shadow: var(--shadow); border-inline-start: 5px solid var(--c); }
.chap-art svg { width: 100%; height: 100%; display: block; }
.chap-body { padding: 10px 12px; } .chap-body p { margin: 0 0 4px; } .chap-n { font-size: .75rem; color: var(--c); font-weight: 700; }
.chap .yrs { font-size: .8rem; color: var(--muted); }
.dimgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(165px, 1fr)); gap: 10px; }
.dimcard { display: flex; gap: 10px; padding: 10px; border-radius: 14px; background: var(--card); border: 1px solid var(--line); }
.dimcard .dimic { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: color-mix(in srgb, var(--c) 18%, var(--card)); font-size: 1.2rem; flex: none; }
.dimcard > div:last-child { flex: 1; min-width: 0; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; } .badge { background: var(--warn-bg); padding: 5px 12px; border-radius: 999px; font-size: .85rem; }

/* ---------- โหมดผจญภัย ---------- */
.art { position: relative; margin: -14px -14px 0; height: 38vh; min-height: 210px; max-height: 340px; overflow: hidden; border-bottom: 5px solid var(--c); }
.art-svg, .art-svg svg { width: 100%; height: 100%; display: block; }
.art-top { position: absolute; top: 10px; left: 10px; right: 10px; display: flex; justify-content: space-between; gap: 8px; }
.stepbar { margin: 0 -14px; }
.stepbar .bar { margin: 0; border-radius: 0; height: 5px; }
.scene-card { margin-top: 12px; }
.scene-title { color: var(--pri); }
.scene-card p { font-size: 1.02rem; }
.scene-card .intro { font-style: italic; color: var(--muted); border-inline-start: 3px solid var(--acc); padding-inline-start: 10px; }
.scene-card.lesson { border-color: var(--acc); background: linear-gradient(180deg, var(--warn-bg), var(--card) 80px); }
.q { font-weight: 700; font-size: 1.08rem !important; }
.opts { display: grid; gap: 8px; margin: 10px 0; }
.opt { text-align: start; padding: 12px 14px; border-radius: 14px; border: 2px solid var(--line); background: var(--card); line-height: 1.5; }
.opt:hover:not([disabled]) { border-color: var(--pri); }
.opt.ok { border-color: var(--ok); background: var(--ok-bg); }
.opt.bad { border-color: var(--bad); background: var(--bad-bg); opacity: .8; }
.feedback { border-radius: 12px; padding: 0; margin-top: 8px; }
.feedback.ok, .feedback.bad { padding: 10px 12px; }
.feedback.ok { background: var(--ok-bg); border: 1px solid var(--ok); } .feedback.bad { background: var(--bad-bg); border: 1px solid var(--bad); }
.lbl { margin: 14px 0 4px; font-size: .9rem; color: var(--muted); }
.picked { margin: 0; padding-inline-start: 1.6em; display: grid; gap: 6px; min-height: 2.4em; }
.pk { padding: 8px 10px; border-radius: 10px; background: var(--pri-soft); cursor: pointer; }
.pk.ok { background: var(--ok-bg); } .pk.bad { background: var(--bad-bg); } .pk em { color: var(--muted); font-size: .85em; }
.qhead { display: flex; justify-content: space-between; align-items: center; }
.result .review { padding: 10px 0; border-top: 1px dashed var(--line); }
.mapbox { margin: 10px 0; }

/* ---------- คลังความรู้ / ไทม์ไลน์ ---------- */
.seg { display: flex; background: var(--pri-soft); border-radius: 12px; padding: 3px; margin-bottom: 10px; }
.seg button { flex: 1; border: 0; background: transparent; padding: 8px; border-radius: 10px; font-weight: 600; color: var(--pri); }
.seg button.on { background: var(--pri); color: var(--pri-ink); }
.search { width: 100%; padding: 11px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--card); margin-bottom: 6px; }
.topics { display: grid; gap: 8px; margin-top: 6px; }
.topic { background: var(--card); border: 1px solid var(--line); border-inline-start: 5px solid var(--c); border-radius: 14px; }
.topic summary { display: flex; gap: 10px; align-items: center; padding: 10px 12px; cursor: pointer; list-style: none; }
.topic summary::-webkit-details-marker { display: none; }
.topic .ti { font-size: 1.4rem; } .topic .tb { padding: 0 14px 12px; }
.tl { list-style: none; margin: 10px 0; padding: 0; }
.tl li { display: grid; grid-template-columns: 78px 1fr; gap: 10px; padding-bottom: 14px; position: relative; }
.tl li::before { content: ""; position: absolute; left: 83px; top: 6px; bottom: 0; width: 2px; background: var(--line); }
.tl-y { font-weight: 700; text-align: end; font-size: .9rem; color: var(--c); }
.tl-b { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 8px 12px; margin-inline-start: 14px; border-inline-start: 4px solid var(--c); }
.tl-b p { margin: 4px 0; }

/* ---------- แผนที่ ---------- */
.map svg { width: 100%; height: auto; display: block; }
.map .mp { cursor: pointer; }
.slider { width: 100%; accent-color: var(--pri); margin: 8px 0; }
.legend { display: flex; flex-wrap: wrap; gap: 12px; font-size: .8rem; margin-top: 6px; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-inline-end: 4px; }

/* ---------- ตั้งค่า ---------- */
.row { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.row > div:first-child { flex: 1; min-width: 0; } .row p { margin: 0; }
.row select, .row input[type=text], .row input[type=range] { max-width: 48%; min-width: 120px; padding: 6px 8px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); }
.row input[type=range] { padding: 0; border: 0; accent-color: var(--pri); }
.sw { appearance: none; width: 46px; height: 26px; border-radius: 99px; background: var(--line); position: relative; transition: .2s; flex: none; }
.sw::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: .2s; }
.sw:checked { background: var(--pri); } .sw:checked::after { left: 23px; }
.about li { margin-bottom: 6px; }
.src-detail h4 { margin-bottom: 2px; }

/* ---------- Sheet / Toast ---------- */
.backdrop { position: fixed; inset: 0; z-index: 200; background: rgba(0,0,0,.45); display: flex; align-items: flex-end; justify-content: center; opacity: 0; transition: opacity .2s; }
.backdrop.on { opacity: 1; }
.sheet { width: 100%; max-width: 560px; max-height: 88vh; overflow: auto; background: var(--card); border-radius: 22px 22px 0 0; padding: 8px 18px calc(20px + env(safe-area-inset-bottom)); transform: translateY(30px); transition: transform .22s; }
.backdrop.on .sheet { transform: none; }
.sheet-grip { width: 44px; height: 5px; border-radius: 9px; background: var(--line); margin: 4px auto 8px; }
.sheet-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.toast { position: fixed; left: 50%; bottom: calc(86px + env(safe-area-inset-bottom)); transform: translate(-50%, 20px); background: #1f2a26; color: #fff; padding: 10px 16px; border-radius: 12px; z-index: 300; opacity: 0; transition: .3s; max-width: 90vw; font-size: .9rem; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }
.rest { text-align: center; } .rest ul { text-align: start; display: inline-block; }
.rest-num { font-size: 3.4rem; font-weight: 800; color: var(--pri); margin: 8px 0; }
.rest .btn { margin: 4px; }

/* ---------- โหมดถนอมสายตา: overlay ---------- */
#warm { position: fixed; inset: 0; background: rgb(255, 150, 40); mix-blend-mode: multiply; pointer-events: none; z-index: 9990; opacity: 0; transition: opacity .3s; }
#dimmer { position: fixed; inset: 0; background: #000; pointer-events: none; z-index: 9991; opacity: 0; transition: opacity .3s; }
:root[data-theme="eye"] .art-svg, :root[data-theme="eye"] .hero-art, :root[data-theme="eye"] .chap-art { filter: sepia(.35) saturate(.85); }
:root[data-theme="night"] .art-svg, :root[data-theme="night"] .hero-art, :root[data-theme="night"] .chap-art { filter: brightness(.7) saturate(.85); }

@media (min-width: 720px) {
  .art { margin: 0; border-radius: 0 0 18px 18px; }
  .stepbar { margin: 0; }
  .chapters { grid-template-columns: 1fr 1fr; }
  .backdrop { align-items: center; } .sheet { border-radius: 22px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }