/* สมุดแผนธุรกิจ — ทุกค่ามาจาก DESIGN.md (กระดาษคำนวณวิศวกร · หมึกเขียว · ปากกาเทียนส้ม) */
:root {
  --pad: #E9F0E4; --sheet: #FAFCF7; --ink: #1B2620; --lead: #1E5E3F; --lead-ink: #FFFFFF;
  --grease: #D9480F; --grease-ink: #A8380A; --muted: #55665B; --grid: #CFDCCB;
  --ok: #1D7748; --warn: #8F5B00; --bad: #B42318;
  --ok-bg: #E3F1E8; --warn-bg: #F6EEDB; --bad-bg: #F8E4E1;
  --r-input: 4px; --r-sheet: 6px;
  --f-head: "Anuphan", "Noto Sans Thai", sans-serif;
  --f-body: "Noto Sans Thai", sans-serif;
  --f-num: "IBM Plex Mono", ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --pad: #101612; --sheet: #18201B; --ink: #E3EAE4; --lead: #7FCFA3; --lead-ink: #0E1A13;
    --grease: #FF8A4C; --grease-ink: #FFB088; --muted: #9BAAA0; --grid: #26332B;
    --ok: #62D49B; --warn: #F0B847; --bad: #FF8A80;
    --ok-bg: #16281E; --warn-bg: #2A2414; --bad-bg: #2E1A18;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); font: 400 16px/1.7 var(--f-body);
  background-color: var(--pad);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px; background-position: -1px -1px;
}
a { color: var(--lead); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--lead); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--f-head); font-weight: 700; line-height: 1.35; margin: 0 0 12px; }
h1 { font-size: clamp(28px, 5vw, 44px); letter-spacing: -0.01em; }
h2 { font-size: 22px; margin-top: 32px; }
p { margin: 0 0 12px; }
.mono, .num { font-family: var(--f-num); font-variant-numeric: tabular-nums; }
.small { font-size: 14px; color: var(--muted); }
.kicker { font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.lede { font-size: 18px; }

/* ---------- ส่วนหัว ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 12px 24px; background: var(--sheet); border-bottom: 1px solid var(--grid);
}
.logo { font-family: var(--f-head); font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; }
.logo span { font-family: var(--f-body); font-weight: 400; font-size: 14px; color: var(--muted); margin-left: 6px; }
.topnav { display: flex; align-items: center; gap: 4px 16px; flex-wrap: wrap; }
.topnav a { color: var(--ink); text-decoration: none; padding: 4px 0; border-bottom: 2px solid transparent; transition: border-color 150ms ease-out; }
.topnav a:hover, .topnav a[aria-current="page"] { border-bottom-color: var(--lead); }
.topnav form { margin: 0; }

/* ---------- พื้นที่อ่าน ---------- */
.read { max-width: 720px; margin: 0 auto; padding: 40px 16px 48px; }
.wide { max-width: 1200px; margin: 0 auto; padding: 32px 16px 48px; }
.foot { padding-top: 0; font-size: 14px; }
.steps-list { padding-left: 24px; }
.steps-list li { margin-bottom: 8px; }

/* ---------- แผ่นงาน ---------- */
.sheet { background: var(--sheet); border: 1px solid var(--grid); border-radius: var(--r-sheet); padding: 24px; margin: 0 0 16px; }
.form-sheet { margin-top: 32px; }
.form-sheet h2 { margin-top: 0; }
.h-page { font-size: clamp(26px, 4vw, 34px); margin-bottom: 8px; }
.h-sec { font-size: 19px; margin: 0 0 12px; }
.h-sub { font-size: 16px; margin: 0 0 8px; }
.hint { color: var(--muted); max-width: 64ch; margin-bottom: 20px; }
.pre, .op-text { white-space: pre-wrap; }

/* ---------- ฟอร์ม ---------- */
label { display: block; font-weight: 600; margin: 16px 0 6px; }
label:first-child { margin-top: 0; }
input, textarea, select {
  width: 100%; font: inherit; color: var(--ink); background: var(--sheet);
  border: 1px solid var(--muted); border-radius: var(--r-input); padding: 10px 12px;
  transition: border-color 150ms ease-out;
}
textarea { resize: vertical; line-height: 1.7; }
input:hover, textarea:hover, select:hover { border-color: var(--ink); }
input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid var(--lead); outline-offset: 0; border-color: var(--lead); }
input[aria-invalid="true"] { border-color: var(--bad); }
.field-err { color: var(--bad); font-size: 14px; margin: 4px 0 0; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.check input { width: 20px; height: 20px; margin: 4px 0 0; flex: none; accent-color: var(--lead); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.row2 > div > label:first-child { margin-top: 16px; }
.keyrow { display: flex; gap: 8px; }
.keyrow input { flex: 1; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
legend { font-weight: 600; padding: 0; margin-bottom: 8px; }
.chips label { display: flex; gap: 10px; align-items: center; font-weight: 400; margin: 6px 0; }
.chips input { width: 18px; height: 18px; accent-color: var(--lead); }

/* ---------- ปุ่ม ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 8px 18px;
  font: 600 16px/1.4 var(--f-body); color: var(--lead); background: var(--sheet);
  border: 1px solid var(--lead); border-radius: var(--r-input); cursor: pointer; text-decoration: none;
  transition: background-color 150ms ease-out, color 150ms ease-out;
}
.btn:hover { background: var(--pad); }
.btn.primary { background: var(--lead); color: var(--lead-ink); }
.btn.primary:hover { background: var(--ink); border-color: var(--ink); color: var(--sheet); }
.btn:disabled { opacity: .65; cursor: progress; }
form .btn, .sheet > .btn { margin-top: 20px; }
.linkbtn { background: none; border: 0; padding: 4px 0; font: inherit; color: var(--lead); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }
.linkbtn.danger { color: var(--bad); margin-top: 12px; }
.copybar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-top: 16px; }

/* ---------- ข้อความระบบ ---------- */
.msg { padding: 10px 14px; border-radius: var(--r-input); border-left: 4px solid var(--muted); background: var(--sheet); margin: 0 0 16px; }
.msg.ok { border-color: var(--ok); background: var(--ok-bg); }
.msg.warn { border-color: var(--warn); background: var(--warn-bg); }
.msg.bad { border-color: var(--bad); background: var(--bad-bg); }
.msg[hidden] { display: none; }
.empty { color: var(--muted); }

/* ---------- แอป ---------- */
.shell { display: grid; grid-template-columns: 248px minmax(0, 1fr); gap: 32px; max-width: 1120px; margin: 0 auto; padding: 24px 16px 64px; }
.rail { position: sticky; top: 16px; align-self: start; display: flex; flex-direction: column; gap: 2px; }
.rail a { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 8px; padding: 8px 10px; color: var(--ink); text-decoration: none; border-radius: var(--r-input); border-left: 3px solid transparent; transition: background-color 150ms ease-out; }
.rail a:hover { background: var(--sheet); }
.rail a[aria-current="page"] { background: var(--sheet); border-left-color: var(--grease); font-weight: 600; }
.rail .n { font-family: var(--f-num); color: var(--muted); width: 1ch; }
.rail .done { flex-basis: 100%; padding-left: calc(1ch + 8px); font-size: 13px; color: var(--ok); font-weight: 400; }
.rail .done:empty { display: none; }
.rail-h { font-size: 13px; color: var(--muted); margin: 16px 10px 4px; }
.rail-final { margin-top: 12px; border: 1px solid var(--lead) !important; border-left-width: 3px !important; color: var(--lead) !important; font-weight: 600; }
.rail-sync { margin: 12px 10px 0; min-height: 1.7em; }
.work { min-width: 0; max-width: 780px; }
.page[hidden] { display: none; }

.out:empty { display: none; }
.aibox .result { font-size: 15px; background: var(--pad); }
.skeleton span { display: block; height: 14px; margin: 10px 0; border-radius: 3px; background: var(--grid); animation: pulse 1.2s ease-in-out infinite; }
.skeleton span:nth-child(odd) { width: 92%; } .skeleton span:nth-child(even) { width: 70%; }
@keyframes pulse { 50% { opacity: .45; } }
.sum { border-left: 4px solid var(--lead); }
.sum label { color: var(--lead); }
.howto summary { cursor: pointer; font-weight: 600; }
.howto ol { padding-left: 22px; margin: 12px 0; }
details.sheet > summary { font-family: var(--f-head); font-size: 18px; }

/* ความคืบหน้า */
.progress { list-style: none; padding: 0; margin: 0 0 4px; }
.progress li { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px dashed var(--grid); }
.progress .st { font-size: 14px; color: var(--muted); white-space: nowrap; }
.progress .st.ok { color: var(--ok); }

/* เช็คสุขภาพ */
.checklist { list-style: none; padding: 0; margin: 0; counter-reset: q; }
.checklist > li { counter-increment: q; padding: 14px 0; border-bottom: 1px dashed var(--grid); }
.checklist > li:last-child { border-bottom: 0; }
.rate legend { display: flex; gap: 10px; align-items: baseline; font-weight: 400; }
.rate legend::before { content: counter(q) "."; font-family: var(--f-num); color: var(--muted); }
.tag { font-size: 13px; font-weight: 600; color: var(--lead); border: 1px solid var(--grid); border-radius: 3px; padding: 0 6px; white-space: nowrap; }
.rate-row { display: flex; gap: 8px; }
.rate-row label { margin: 0; position: relative; }
.rate-row input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.rate-row span {
  display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 44px;
  font-family: var(--f-num); border: 1px solid var(--muted); border-radius: var(--r-input); cursor: pointer; background: var(--sheet);
  transition: background-color 150ms ease-out, color 150ms ease-out;
}
.rate-row span:hover { background: var(--pad); }
.rate-row input:checked + span { background: var(--lead); color: var(--lead-ink); border-color: var(--lead); }
.rate-row input:focus-visible + span { outline: 3px solid var(--lead); outline-offset: 2px; }
.rate-ends { margin: 6px 0 0; }

/* ผลตัวเลข + ลูกเล่นปากกาวง */
.bignum-wrap { margin-bottom: 16px; }
.bignum { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 12px; margin: 0; }
.bignum .unit { color: var(--muted); }
.circled { position: relative; display: inline-block; padding: 6px 22px; font: 500 clamp(40px, 8vw, 60px)/1.1 var(--f-num); color: var(--grease-ink); }
.circled svg { position: absolute; inset: -6px -8px; width: calc(100% + 16px); height: calc(100% + 12px); overflow: visible; pointer-events: none; }
.circled path { fill: none; stroke: var(--grease); stroke-width: 3.2; stroke-linecap: round; }
.circled svg.draw path { stroke-dasharray: 100; animation: draw 600ms ease-out both; }
@keyframes draw { from { stroke-dashoffset: 100; } to { stroke-dashoffset: 0; } }
@media (prefers-reduced-motion: reduce) { .circled svg.draw path { animation: none; } .skeleton span { animation: none; } }
.plain { list-style: none; padding: 0; margin: 0 0 12px; }
.plain li { padding: 4px 0; }
.calc { width: 100%; border-collapse: collapse; margin-bottom: 12px; }
.calc th, .calc td { text-align: left; padding: 8px 0; border-bottom: 1px dashed var(--grid); font-weight: 400; vertical-align: top; }
.calc td { text-align: right; padding-left: 12px; white-space: nowrap; }
.calc td.neg { color: var(--bad); }

/* ---------- แผน 1 หน้า ---------- */
.onepage { background: #FFFFFF; color: #1B2620; border: 1px solid var(--grid); border-radius: var(--r-sheet); padding: 32px; margin-top: 16px; }
.op-kicker { font-size: 13px; color: #55665B; margin: 0; }
.op-title { font-size: 28px; margin: 0 0 4px; color: #1E5E3F; }
.op-what { margin: 0 0 4px; }
.op-meta { font-size: 13px; color: #55665B; }
.op-goal { border: 2px solid #D9480F; border-radius: var(--r-sheet); padding: 12px 16px; margin: 16px 0; }
.op-label { font-size: 13px; color: #A8380A; font-weight: 600; margin: 0; }
.op-goaltext { font-family: var(--f-head); font-weight: 700; font-size: 20px; margin: 0; }
.op-nums { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 0 0 16px; }
.op-nums div { border-top: 2px solid #1E5E3F; padding-top: 6px; }
.op-nums dt { font-size: 13px; color: #55665B; }
.op-nums dd { margin: 0; font-size: 17px; }
.op-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
.op-block, .op-plan { border-top: 1px solid #CFDCCB; padding-top: 8px; }
.op-plan { margin-top: 12px; }
.op-h { font-size: 15px; color: #1E5E3F; margin: 0 0 4px; }
.op-text { font-size: 14px; line-height: 1.6; margin: 0; }
.op-foot { font-size: 12px; color: #55665B; margin: 16px 0 0; }

/* ---------- หลังบ้าน ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 16px 0 24px; }
.stats div { background: var(--sheet); border: 1px solid var(--grid); border-radius: var(--r-sheet); padding: 12px 16px; }
.stats dt { font-size: 14px; color: var(--muted); }
.stats dd { margin: 0; font: 500 28px/1.3 var(--f-num); }
.search { display: flex; gap: 8px; align-items: center; margin-bottom: 16px; }
.search label { margin: 0; }
.search input { max-width: 320px; }
.search .btn { margin: 0; }
.table-wrap { overflow-x: auto; background: var(--sheet); border: 1px solid var(--grid); border-radius: var(--r-sheet); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--grid); vertical-align: top; }
thead th { font-weight: 600; background: var(--pad); white-space: nowrap; }
td.num, th.num { text-align: right; }
tbody tr:hover { background: var(--pad); }
code { font-family: var(--f-num); background: var(--pad); padding: 1px 6px; border-radius: 3px; }

/* ---------- มือถือ ---------- */
@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; gap: 16px; padding-top: 12px; }
  .rail { position: static; flex-direction: row; overflow-x: auto; gap: 6px; padding-bottom: 6px; scrollbar-width: thin; }
  .rail a { flex: none; white-space: nowrap; border-left: 0; border-bottom: 3px solid transparent; background: var(--sheet); border: 1px solid var(--grid); }
  .rail a[aria-current="page"] { border-bottom: 3px solid var(--grease); }
  .rail .done { display: none; }
  .rail-h { display: none; }
  .rail-final { margin-top: 0; }
  .rail-sync { flex: none; align-self: center; white-space: nowrap; margin: 0 6px; }
  .op-nums, .stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .topbar { padding: 10px 16px; }
  .sheet { padding: 16px; }
  .row2, .op-grid { grid-template-columns: 1fr; }
  .rate-row span { width: 44px; }
  .onepage { padding: 16px; }
  .keyrow { flex-wrap: wrap; }
}

/* ---------- พิมพ์ ---------- */
@media print {
  @page { size: A4; margin: 12mm; }
  body { background: #FFFFFF; color: #1B2620; font-size: 12px; }
  .topbar, .rail, .noprint, #noKey, .page:not([data-page="onepage"]) { display: none !important; }
  .shell { display: block; padding: 0; max-width: none; }
  .work { max-width: none; }
  .onepage { border: 0; padding: 0; margin: 0; }
  .op-title { font-size: 22px; }
  .op-text { font-size: 11.5px; }
  .op-block, .op-goal, .op-nums div { break-inside: avoid; }
}