@font-face{font-family:'TH Sarabun New';font-style:normal;font-weight:400;font-display:swap;src:local('TH Sarabun New'),local('THSarabunNew'),url(../fonts/thsarabunnew-400.woff) format('woff')}
@font-face{font-family:'TH Sarabun New';font-style:normal;font-weight:700;font-display:swap;src:local('TH Sarabun New Bold'),local('THSarabunNew-Bold'),local('THSarabunNew Bold'),url(../fonts/thsarabunnew-700.woff) format('woff')}
@font-face{font-family:'Sarabun';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/sarabun-thai-400-normal.woff2) format('woff2');unicode-range:U+0E01-0E5B,U+200B-200D,U+25CC}
@font-face{font-family:'Sarabun';font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/sarabun-latin-400-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Sarabun';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/sarabun-thai-700-normal.woff2) format('woff2');unicode-range:U+0E01-0E5B,U+200B-200D,U+25CC}
@font-face{font-family:'Sarabun';font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/sarabun-latin-700-normal.woff2) format('woff2');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
[hidden]{display:none !important}
:root{
  --bg:#f4f5f7; --panel:#fff; --ink:#1d2433; --muted:#667085; --line:#d9dde5; --brand:#1f5eff; --brand-ink:#fff;
  --ok:#0a7a45; --warn:#b45309; --err:#c0262d; --nav:#fbfbfd; --shadow:0 1px 2px rgba(16,24,40,.08),0 4px 14px rgba(16,24,40,.06);
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){ --bg:#14171d; --panel:#1c212b; --ink:#e8ebf2; --muted:#98a2b3; --line:#2d3544; --brand:#6b93ff; --brand-ink:#0b1020; --nav:#181c25; --ok:#4ade80; --warn:#fbbf24; --err:#f87171; }}
:root[data-theme="dark"]{ --bg:#14171d; --panel:#1c212b; --ink:#e8ebf2; --muted:#98a2b3; --line:#2d3544; --brand:#6b93ff; --brand-ink:#0b1020; --nav:#181c25; --ok:#4ade80; --warn:#fbbf24; --err:#f87171; }
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.45 'Sarabun','TH Sarabun New',system-ui,sans-serif}
button,input,select{font:inherit;color:inherit}
.grow{flex:1}
.btn{border:1px solid var(--line);background:var(--panel);padding:.35rem .85rem;border-radius:8px;cursor:pointer;min-height:36px}
.btn:hover{border-color:var(--brand)}
.btn.primary{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);font-weight:600}
.btn.ghost{background:transparent}
.btn.wide{width:100%;min-height:44px;margin-top:.75rem}
.btn:disabled{opacity:.6;cursor:default}
.icon{background:none;border:0;font-size:1.4rem;cursor:pointer;display:none;padding:.2rem .5rem}

/* login */
.login{min-height:100%;display:grid;place-items:center;padding:24px 16px;background:#eef4fb url('../img/login-bg.webp') center/cover no-repeat}
.login{position:relative}
.login .login-card{background:color-mix(in srgb,var(--panel) 88%,transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);box-shadow:0 18px 50px rgba(20,60,140,.18);border-color:color-mix(in srgb,var(--panel) 70%,transparent);color:var(--ink)}
/* ปุ่มสลับโหมดมืด/สว่าง */
.theme-fab{position:absolute;top:max(14px,env(safe-area-inset-top));right:14px;width:44px;height:44px;padding:0;border-radius:99px;font-size:1.2rem;background:color-mix(in srgb,var(--panel) 85%,transparent);box-shadow:var(--shadow);z-index:2}
.theme-btn{min-width:40px;padding:.3rem .5rem !important;font-size:1.05rem}
@media (max-width:700px){.login{background-position:18% bottom}}
.login-card{background:var(--panel);width:min(440px,100%);padding:28px;border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--line)}
.login-card h1{font-size:1.5rem;margin:0 0 .5rem;line-height:1.25}
.login-card h1 small{font-size:.95rem;font-weight:400;color:var(--muted)}
.lead{color:var(--muted);margin:.25rem 0 1rem}
.login-card label{display:block;font-weight:600;margin:.5rem 0 .25rem}
.login-card label.chk{font-weight:400;display:flex;gap:.5rem;align-items:center;margin-top:.6rem}
.login-card input[type=text]{width:100%;padding:.65rem .8rem;border:1px solid var(--line);border-radius:10px;background:var(--bg);letter-spacing:.06em;font-size:1.1rem}
.login-card input[type=text]:focus{outline:2px solid var(--brand);outline-offset:1px}
.err{color:var(--err);min-height:1.4em;margin:.5rem 0 0}
.demo{background:color-mix(in srgb,var(--warn) 12%,transparent);border:1px solid var(--warn);padding:.5rem .7rem;border-radius:8px;font-size:.92rem}
.fine{color:var(--muted);font-size:.8rem;margin:1rem 0 0;text-align:center}
.fine a{color:var(--brand);font-weight:600;white-space:nowrap}
.nw{white-space:nowrap}

/* app shell */
#app{height:100%;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;gap:.6rem;padding:.45rem .9rem;background:var(--panel);border-bottom:1px solid var(--line);min-height:52px}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.1rem}
.brand .lock{font-size:.9rem;opacity:.8}
.brand .grade{background:var(--brand);color:var(--brand-ink);border-radius:999px;padding:0 .6rem;font-size:.9rem}
#grade-switch{padding:.3rem;border-radius:8px;border:1px solid var(--line);background:var(--panel)}
.savestat{font-size:.88rem;color:var(--muted)}
.savestat.ok{color:var(--ok)} .savestat.dirty,.savestat.saving{color:var(--warn)} .savestat.err,.savestat.warn{color:var(--err)}
.shell{flex:1;display:flex;min-height:0}
#nav{width:250px;flex:none;overflow:auto;background:var(--nav);border-right:1px solid var(--line);padding:.5rem}
#nav summary{cursor:pointer;font-weight:700;padding:.4rem .4rem;color:var(--muted);font-size:.9rem;list-style:none}
#nav summary::before{content:'▸ '} #nav details[open]>summary::before{content:'▾ '}
.navitem{display:block;width:100%;text-align:left;border:0;background:none;padding:.32rem .6rem .32rem .9rem;border-radius:8px;cursor:pointer;border-left:4px solid var(--tab,transparent);margin:1px 0;font-size:.95rem}
.navitem:hover{background:color-mix(in srgb,var(--brand) 10%,transparent)}
.navitem.on{background:color-mix(in srgb,var(--brand) 18%,transparent);font-weight:700}
.stage{flex:1;min-width:0;display:flex;flex-direction:column}
.sheet-head{display:flex;gap:1rem;align-items:center;flex-wrap:wrap;padding:.5rem .9rem;border-bottom:1px solid var(--line);background:var(--panel)}
.sheet-head h2{margin:0;font-size:1.05rem}
.tools{display:flex;gap:.5rem;align-items:center;flex:1;flex-wrap:wrap}
.zoom{font-size:.9rem;color:var(--muted)} .zoom select{padding:.2rem;border-radius:6px;border:1px solid var(--line);background:var(--panel)}
.sheet-scroll{flex:1;overflow:auto;padding:14px;background:var(--bg)}
#sheet-host{display:inline-block;background:#fff;box-shadow:var(--shadow);color:#000;transform-origin:top left}

/* ตารางชีท (สีพื้นเอกสารคงที่เป็นสีขาวเหมือนกระดาษ) */
table.xl{border-collapse:collapse;table-layout:fixed;background:#fff;color:#000}
table.xl td{padding:1px 3px;overflow:hidden;line-height:1.15;font-family:'TH Sarabun New','Sarabun',sans-serif;font-size:14.6px}
table.xl.grid td{border:1px solid #e1e3e8}
table.xl td.num{text-align:right}
table.xl td.inp{cursor:cell;outline:0}
table.xl td.inp:hover{box-shadow:inset 0 0 0 2px #1f5eff55}
table.xl td.dvl::after{content:'▾';float:right;color:#667085;font-size:.8em}
table.xl td.editing{padding:0;box-shadow:inset 0 0 0 2px #1f5eff}
table.xl td.hasLogo{position:relative}
table.xl img.logo{position:absolute;left:2px;top:2px;object-fit:contain}
table.xl img.logo.fit{left:0;top:0;width:100%;height:100%}
.cell-editor{width:100%;height:100%;min-height:22px;border:0;outline:0;background:#fffbe6;font:inherit;color:#000;padding:0 3px;display:block}
td .rot{white-space:nowrap}

/* modal/toast */
.modal{position:fixed;inset:0;background:rgba(10,14,25,.5);display:grid;place-items:center;z-index:50;padding:16px}
.modal[hidden]{display:none}
.modal-card{background:var(--panel);border-radius:14px;padding:20px 22px;width:min(460px,100%);box-shadow:var(--shadow)}
.modal-card h3{margin:0 0 .5rem} .modal-body .hint{color:var(--muted);font-size:.9rem}
.modal-actions{display:flex;justify-content:flex-end;gap:.5rem;margin-top:1rem}
.toasts{position:fixed;right:14px;bottom:14px;display:flex;flex-direction:column;gap:8px;z-index:60;max-width:min(380px,92vw)}
.toast{background:var(--ink);color:var(--bg);padding:.6rem .9rem;border-radius:10px;box-shadow:var(--shadow);white-space:pre-line;transition:opacity .5s}
.toast.warn{background:var(--warn);color:#fff} .toast.ok{background:var(--ok);color:#fff} .toast.out{opacity:0}
.loading{position:fixed;inset:0;background:var(--bg);display:grid;place-content:center;justify-items:center;gap:12px;z-index:40}
.loading[hidden]{display:none}
.spin{width:36px;height:36px;border-radius:50%;border:4px solid var(--line);border-top-color:var(--brand);animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

@media (max-width:820px){
  .icon{display:block}
  #nav{position:fixed;z-index:30;top:52px;bottom:0;left:0;transform:translateX(-100%);transition:transform .2s;box-shadow:var(--shadow)}
  body.navopen #nav{transform:none}
  .brand{font-size:1rem;max-width:42vw;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
}

/* ===== ลายน้ำ (เว็บตัวอย่าง) ===== */
.wm-layer{position:fixed;inset:-30%;z-index:9000;pointer-events:none;user-select:none;display:flex;flex-wrap:wrap;align-content:space-around;justify-content:space-around;gap:110px 140px;transform:rotate(-28deg);overflow:hidden}
.wm-layer span{font:700 34px/1 'Sarabun',sans-serif;color:rgba(220,38,38,.11);white-space:nowrap}
.pp-page{position:relative}
.pp-page .wm-layer{position:absolute;inset:-25%;gap:150px 120px;z-index:5}
.pp-page .wm-layer span{font-size:46px;color:rgba(220,38,38,.13)}

/* หน้าข้อมูลนักเรียน (เล่ม ปพ.5 รายวิชา) */
.pp-stu{font-family:'TH Sarabun New','Sarabun',sans-serif;color:#000;font-size:15px}
.pp-stu h1{text-align:center;font-size:21px;margin:0 0 6px}
.pp-stu .pp-sub{text-align:center;margin:2px 0}
.pp-stu table{width:100%;border-collapse:collapse;margin-top:10px}
.pp-stu th,.pp-stu td{border:1px solid #000;padding:2px 6px;text-align:center;height:21px}
.pp-stu th{background:#dbe7ff;-webkit-print-color-adjust:exact;print-color-adjust:exact}
.pp-stu td.l{text-align:left}
.pp-stu .pp-sum{margin:8px 0 0;text-align:right}

/* ===== พิมพ์ ===== */
#print-root{display:none}
/* ตัวอย่างก่อนพิมพ์ */
body.previewing > *:not(#print-root):not(#pv-bar){display:none !important}
body.previewing #print-root{display:block;padding:72px 16px 32px;overflow-x:auto}
#pv-bar{display:none}
body.previewing #pv-bar{display:flex;position:fixed;top:0;left:0;right:0;z-index:9500;align-items:center;flex-wrap:wrap;gap:6px 14px;padding:8px 16px;background:var(--panel);color:var(--ink);box-shadow:var(--shadow)}
#pv-bar .pv-fs{display:inline-flex;align-items:center;gap:6px}
#pv-bar output{min-width:3.2em;text-align:center;font-weight:700}
#pv-bar .pv-act{margin-left:auto;display:inline-flex;gap:8px}
@media screen{
  body.previewing{background:#e5e7eb}
  body.previewing .pp-page{position:relative;box-sizing:border-box;overflow:hidden;background:#fff;margin:0 auto 18px;box-shadow:0 2px 10px rgba(0,0,0,.18)}
  body.previewing .pp-page.port{width:210mm;height:297mm}
  body.previewing .pp-page.land{width:297mm;height:210mm}
  body.previewing .pp-page.vc{display:flex;flex-direction:column;justify-content:center}
}
@page { margin: 0; }
@page land { size: A4 landscape; margin: 0 }
@page port { size: A4 portrait; margin: 0 }
@media print{
  body.printing > *:not(#print-root){display:none !important}
  body.printing #print-root,body.previewing #print-root{padding:0 !important;display:block}
  #pv-bar{display:none !important}
  body.printing #print-root{display:block}
  body{background:#fff}
  .pp-page{page-break-after:always;break-after:page;box-sizing:border-box;overflow:hidden}
  .pp-page:last-child{page-break-after:auto;break-after:auto}
  .pp-page.vc{display:flex;flex-direction:column;justify-content:center}
  .pp-page.land{page:land;width:297mm;height:210mm}
  .pp-page.port{page:port;width:210mm;height:297mm}
  table.xl{background:#fff} table.xl td{border-color:inherit}
  table.xl tr.pbreak{break-before:page}
}

.xlbox{position:relative}.xlshape{position:absolute;box-sizing:border-box;pointer-events:none}
img.logo.ov{position:absolute;object-fit:contain;pointer-events:none}
/* หน้าพิมพ์แบบพอดีข้อความ: คอลัมน์ขยายตามข้อความ แถวสูงพอดีข้อความ ระยะบรรทัดชิด */
table.xl.cmp{table-layout:auto}
/* ระยะบรรทัด 1.3 + เว้นบนเล็กน้อย: ข้อความอยู่กลางช่อง สระบน/วรรณยุกต์และสระล่างไม่ชนเส้นตาราง (ใกล้เคียงความสูงแถวของ Excel สำหรับ TH Sarabun New) */
table.xl.cmp td{line-height:var(--cmp-lh,1.3);padding-top:var(--cmp-pt,.08em);padding-bottom:0;overflow:visible;overflow-x:clip}
table.xl.cmp .spill{width:0;overflow:visible;white-space:pre}
table.xl.cmp td{word-break:normal;overflow-wrap:normal}   /* ตัดบรรทัดตามคำ (ไม่ตัดกลางคำ) คอลัมน์กว้างอย่างน้อยเท่าคำที่ยาวที่สุด */
table.xl.cmp tr.sig td{line-height:1.12;padding-top:0}   /* ช่องลายเซ็น: บรรทัดชิด */
table.xl td.sx{font-family:'TH Sarabun New','Sarabun',sans-serif}
/* โหมดมืด: หรี่ภาพพื้นหลังหน้าเข้าสู่ระบบ */
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]) .login{background-image:linear-gradient(rgba(10,14,22,.45),rgba(10,14,22,.45)),url('../img/login-bg.webp')}}
:root[data-theme="dark"] .login{background-image:linear-gradient(rgba(10,14,22,.45),rgba(10,14,22,.45)),url('../img/login-bg.webp')}
.reg-link{text-align:center;margin:.8rem 0 0;font-size:.95rem}

/* นักเรียนออกกลางปี (ย้าย) */
.mvlist{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px;max-height:260px;overflow:auto}
.mvchip{font:inherit;font-size:.9rem;padding:4px 10px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer}
.mvchip:hover{border-color:var(--brand)}
.mvpick select{width:100%;max-width:520px;margin-top:6px}
.mvx{font:inherit;border:0;background:transparent;color:inherit;cursor:pointer;margin-left:6px;padding:0 2px;font-weight:700}
.mvx:hover{color:var(--err)}
.mvchip.on{background:#fff7ed;border-color:#f59e0b;color:#92400e}
input.gc.mv{color:#b45309;font-weight:600;background:#fff7ed}