:root {
  --navy: #17365d;
  --navy-2: #1e4d8c;
  --navy-3: #0f2647;          /* เข้มสุด ใช้ไล่เฉดแถบเมนู */
  --blue-50: #eef4fb;
  --blue-100: #dce8f7;
  --line: #dfe5ed;
  --line-soft: #edf1f6;
  --ink: #16202b;
  --muted: #64707f;
  --ok: #1a7f37;
  --warn: #955800;
  --bad: #c0271c;
  --bg: #eff3f8;
  --radius: 12px;
  /* เงาอ่อน ๆ ให้การ์ดลอยขึ้นจากพื้นหลังเล็กน้อย อ่านง่ายกว่าเส้นขอบล้วน */
  --shadow: 0 1px 2px rgba(16, 36, 64, .05), 0 3px 10px rgba(16, 36, 64, .05);
  --shadow-lg: 0 2px 4px rgba(16, 36, 64, .06), 0 10px 26px rgba(16, 36, 64, .09);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Sarabun", "TH Sarabun New", -apple-system, BlinkMacSystemFont,
               "Segoe UI", "Noto Sans Thai", sans-serif;
  background: var(--bg); color: var(--ink); font-size: 16px; line-height: 1.55;
}
a { color: var(--navy-2); }
h1, h2, h3 { margin: 0 0 10px; line-height: 1.3; color: var(--navy); }
h1 { font-size: 25px; letter-spacing: -.2px; }
h2 { font-size: 20px; } h3 { font-size: 17px; }
h1 + .help { margin: -4px 0 18px; font-size: 14.5px; }
.hidden { display: none !important; }

/* ---------- โครงหน้า ---------- */
.layout { display: flex; min-height: 100vh; }
.side {
  width: 258px; flex: none; color: #fff;
  background: linear-gradient(180deg, var(--navy) 0%, var(--navy-3) 100%);
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.side .brand { padding: 20px 20px 16px; border-bottom: 1px solid rgba(255,255,255,.13); }
.side .brand b { display: block; font-size: 16px; letter-spacing: -.2px; white-space: nowrap; }
.side .brand span { font-size: 13px; color: #a9c2e0; }
.side nav { padding: 12px 10px 16px; overflow-y: auto; flex: 1; scrollbar-width: thin; }
.side nav::-webkit-scrollbar { width: 8px; }
.side nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.16); border-radius: 8px; }
.side .group {
  color: #7f9dc4; font-size: 11.5px; font-weight: 600; letter-spacing: .8px;
  padding: 16px 12px 6px; text-transform: uppercase;
}
.side .group:first-child { padding-top: 4px; }
.side a {
  position: relative; display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; margin-bottom: 1px; color: #dbe6f5; text-decoration: none;
  border-radius: 9px; font-size: 14.5px; line-height: 1.35;
  transition: background .12s ease, color .12s ease;
}
.side a .ic { flex: none; width: 17px; height: 17px; opacity: .72; }
.side a:hover { background: rgba(255,255,255,.10); color: #fff; }
.side a:hover .ic { opacity: 1; }
.side a.active {
  background: #fff; color: var(--navy); font-weight: 600;
  box-shadow: 0 2px 8px rgba(0,0,0,.18);
}
.side a.active .ic { opacity: 1; }
.side a.active::before {
  content: ""; position: absolute; left: -10px; top: 50%; transform: translateY(-50%);
  width: 4px; height: 22px; border-radius: 0 4px 4px 0; background: #7fb0f0;
}
.side .foot { padding: 14px 16px; border-top: 1px solid rgba(255,255,255,.13); font-size: 13px; }
.side .foot button {
  margin-top: 10px; width: 100%; background: rgba(255,255,255,.12); color: #fff;
  border: 1px solid rgba(255,255,255,.14); padding: 8px; border-radius: 9px;
  cursor: pointer; font-family: inherit; transition: background .12s ease;
}
.side .foot button:hover { background: rgba(255,255,255,.2); }
.main { flex: 1; min-width: 0; padding: 22px 26px 60px; }
/* จอกว้างมาก ๆ ให้เนื้อหาอยู่กึ่งกลาง ไม่ยืดจนอ่านยาก */
.main > * { max-width: 1560px; margin-left: auto; margin-right: auto; }
.topbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 18px;
}
.topbar .term {
  background: #fff; border: 1px solid var(--line); border-radius: 999px;
  padding: 5px 16px; font-size: 14px; color: var(--navy); font-weight: 600;
  box-shadow: var(--shadow);
}
.menu-btn { display: none; }

/* ---------- การ์ด / ตาราง ---------- */
.card {
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 20px; margin-bottom: 18px; box-shadow: var(--shadow);
}
.card > h3 { padding-bottom: 10px; border-bottom: 1px solid var(--line-soft); }
.card > h2:first-child, .card > h3:first-child { margin-top: 0; }
.grid { display: grid; gap: 14px; }
.grid.c2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.c3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.c4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.stat {
  position: relative; overflow: hidden; background: #fff; border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow);
}
.stat::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--navy-2), #6ba3e8);
}
.stat .k { font-size: 13px; color: var(--muted); font-weight: 500; }
.stat .v {
  font-size: 30px; font-weight: 700; color: var(--navy);
  line-height: 1.15; font-variant-numeric: tabular-nums; letter-spacing: -.5px;
}
.stat .s { font-size: 13px; color: var(--muted); }

.tablewrap {
  overflow-x: auto; border: 1px solid var(--line-soft); border-radius: 10px; background: #fff;
}
table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
th, td {
  border-bottom: 1px solid var(--line-soft); padding: 8px 10px;
  text-align: center; white-space: nowrap;
}
th {
  background: var(--blue-50); color: var(--navy); font-weight: 600;
  position: sticky; top: 0; border-bottom: 1px solid var(--blue-100);
}
td { font-variant-numeric: tabular-nums; }
td.l, th.l { text-align: left; }
/* ตารางบันทึกข้อความต้องเรียบเหมือนแบบพิมพ์ จึงไม่ใส่ลายสลับสีให้ */
table:not(.memo) tbody tr:nth-child(even) td { background: #fbfcfe; }
table:not(.memo) tbody tr:hover td { background: var(--blue-50); }
table:not(.memo) tbody tr:last-child td { border-bottom: 0; }
tr.total td, table:not(.memo) tbody tr.total:nth-child(even) td {
  font-weight: 700; background: #eaf1fa; color: var(--navy);
  border-top: 1px solid var(--blue-100);
}
/* ตารางแบบบันทึกข้อความ: หัวตารางอยู่ในตัวตารางเดียวกัน คอลัมน์จึงตรงกันเสมอ */
table.memo {
  border-collapse: collapse; table-layout: fixed; width: 100%;
  font-size: 14.5px; font-variant-numeric: tabular-nums;
}
table.memo th, table.memo td {
  border: 1px solid #ccd5e0; padding: 7px 5px;
  overflow: hidden; text-overflow: ellipsis;
}
table.memo tr.hd th {
  background: var(--blue-50); color: var(--navy); font-weight: 700;
  line-height: 1.25; white-space: normal; text-align: center; padding: 6px 4px;
}
table.memo tr.hd:last-of-type th { font-size: 14px; }
table.memo td.l { white-space: normal; word-break: break-word; }
table.memo tbody tr:not(.hd):not(.sum):hover td { background: #eef5ff; }
table.memo tr.todo td { color: #93a1b3; }
table.memo tr.todo td.l, table.memo tr.todo td:nth-child(1),
table.memo tr.todo td:nth-child(2) { color: var(--ink); }
table.memo tr.sum td { background: #eef2f7; font-weight: 700; color: var(--navy);
  padding: 7px 2px; font-size: 13.5px; }
table.memo tr.sum:first-of-type td { border-top: 2px solid #7f93ad; }
table.memo .act { padding: 4px 2px; white-space: nowrap; }
table.memo .act button { margin: 0 1px; padding: 3px 9px; font-size: 13.5px; }

.pill { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 13px; }
.pill.ok { background: #e4f5e9; color: var(--ok); }
.pill.bad { background: #fdeceb; color: var(--bad); }
.pill.warn { background: #fdf3e3; color: var(--warn); }
.pill.grey { background: #eef1f5; color: var(--muted); }

/* ---------- ฟอร์ม ---------- */
label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 3px; }
input, select, textarea, button {
  font-family: inherit; font-size: 15px;
}
input, select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line);
  border-radius: 9px; background: #fff; color: var(--ink);
  transition: border-color .12s ease, box-shadow .12s ease;
}
input:hover, select:hover, textarea:hover { border-color: #c3cfdd; }
input:focus, select:focus, textarea:focus {
  outline: 0; border-color: var(--navy-2); box-shadow: 0 0 0 3px rgba(30,77,140,.16);
}
textarea { min-height: 120px; resize: vertical; }
.field { margin-bottom: 12px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 150px; }
button {
  border: 1px solid var(--navy-2); background: var(--navy-2); color: #fff;
  padding: 8px 18px; border-radius: 9px; cursor: pointer; font-weight: 500;
  box-shadow: 0 1px 2px rgba(16,36,64,.14);
  transition: filter .12s ease, box-shadow .12s ease, transform .06s ease;
}
button:hover { filter: brightness(1.1); box-shadow: 0 2px 8px rgba(16,36,64,.2); }
button:active { transform: translateY(1px); }
button.ghost { background: #fff; color: var(--navy-2); }
button.plain { background: #fff; color: var(--muted); border-color: var(--line); }
button.danger { background: #fff; color: var(--bad); border-color: #f0c4c0; }
button.sm { padding: 4px 11px; font-size: 14px; }
button:disabled { opacity: .55; cursor: not-allowed; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.help { font-size: 13.5px; color: var(--muted); }
.err { background: #fdeceb; border: 1px solid #f2c4c0; color: #8f1d15;
       padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; white-space: pre-wrap; }
.ok-box { background: #e9f6ed; border: 1px solid #bfe3c9; color: #145c2b;
          padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; }

/* ---------- ตารางกรอกเกรด ---------- */
.gradegrid { display: flex; gap: 6px; flex-wrap: wrap; }
.gradegrid .g, .bandbox .g { text-align: center; }
.gradegrid .g label, .bandbox .g label { display: block; font-weight: 700; color: var(--navy); font-size: 15px; }
.gradegrid .g input, .bandbox .g input { width: 68px; text-align: center; font-size: 17px; padding: 7px 4px; }
.bandline { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; }
.bandline .b { background: var(--blue-50); border-radius: 8px; padding: 6px 12px; font-size: 14px; }
.bandline .b.warn { background: #fdf3e3; color: var(--warn); }

/* ---------- ช่องกรอกเกรด จัดกลุ่มตามระดับเหมือนบันทึกข้อความ ---------- */
.bandrow { display: flex; gap: 10px; flex-wrap: wrap; align-items: stretch; }
.bandbox {
  border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 10px 6px; background: #fbfcfe; text-align: center;
}
.bandbox .bt { font-size: 13px; font-weight: 700; color: var(--navy); margin-bottom: 5px; }
.bandbox .bc { display: flex; gap: 6px; }
.bandbox .bs {
  margin-top: 6px; padding-top: 4px; font-size: 12.5px; color: var(--muted);
  border-top: 1px dashed var(--line); white-space: nowrap;
}
.bandbox[data-band="good"] { background: #f3fbf6; border-color: #cbe7d5; }
.bandbox[data-band="fail"] { background: #fdf6f5; border-color: #f0cfcb; }
.bandbox[data-band="ms"]   { background: #fdf8ee; border-color: #efdcb8; }

/* ---------- ป้ายตรวจรายชื่อ 0 / ร / มส / มผ ---------- */
.reqchips { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 12px; }
.reqchips span {
  font-size: 13.5px; border-radius: 999px; padding: 3px 12px;
  border: 1px solid var(--line); background: #fff;
}
.reqchips span.ok { background: #e4f5e9; border-color: #bfe3ca; color: var(--ok); }
.reqchips span.bad { background: #fdf3e3; border-color: #eed5a8; color: var(--warn); }

/* ---------- แถบบันทึกที่ติดขอบล่าง ---------- */
.savebar {
  position: sticky; bottom: 0; z-index: 20;
  display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 16px; margin-bottom: 18px;
  box-shadow: 0 -3px 16px rgba(23, 54, 93, .12);
}
.savebar .sb-status { flex: 1; min-width: 240px; font-size: 14px; }
.savebar .sb-status.ok { color: var(--ok); font-weight: 600; }
.savebar .sb-status.warn { color: var(--warn); }
.savebar .sb-status ul { margin: 3px 0 0; padding-left: 20px; }
.savebar .sb-status li { line-height: 1.45; }
.savebar .actions { flex: none; }
.checkline { display: flex; align-items: center; gap: 8px; }
.checkline input { width: auto; }

/* ---------- เข้าสู่ระบบ ---------- */
.login {
  min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background: linear-gradient(160deg, #e8eff8 0%, #f4f7fb 45%, #eaf0f8 100%);
}
.login .box {
  width: 100%; max-width: 400px; background: #fff; border: 1px solid var(--line-soft);
  border-radius: 16px; padding: 30px; box-shadow: var(--shadow-lg);
}
.login h1 { font-size: 21px; text-align: center; }
.login p.sub { text-align: center; color: var(--muted); margin-top: 0; font-size: 14px; }

/* ---------- โมดัล ---------- */
.modal { position: fixed; inset: 0; background: rgba(15,25,40,.45); display: grid;
         place-items: center; padding: 18px; z-index: 50; }
.modal .box { background: #fff; border-radius: 12px; padding: 20px; width: 100%;
              max-width: 620px; max-height: 88vh; overflow: auto; }

@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .side { position: static; width: auto; height: auto; }
  .side nav { display: none; }
  .side nav.open { display: block; }
  .menu-btn { display: inline-block; }
  /* ชื่อผู้ใช้กับปุ่มออกจากระบบ ให้อยู่ในเมนู ไม่ต้องคั่นก่อนเนื้อหา */
  .side .foot { display: none; }
  .side nav.open ~ .foot { display: block; }
  .side .brand { padding: 12px 14px; gap: 10px; }
  .side .brand .blogo { width: 34px; height: 34px; }
  .side .brand .btext { flex: 1; }
  .side .brand .btext b { font-size: 15.5px; }
  .side .brand .btext span { display: none; }
  .side .brand .menu-btn { margin-top: 0 !important; flex: none; }
  .main { padding: 16px 14px 50px; }
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: 1fr; }
  .savebar { padding: 10px 12px; }
  h1 { font-size: 22px; }
}

/* ---------- หน้าตรวจก่อนปิดภาคเรียน ---------- */
.ckbox { background:#fff; border:1px solid var(--line); border-left-width:5px;
  border-radius:var(--radius); padding:14px 16px; margin-bottom:12px; }
.ckbox.ok   { border-left-color:#1a7f37; }
.ckbox.warn { border-left-color:#e0a800; }
.ckbox.bad  { border-left-color:#c0271c; }
.ckhead { display:flex; align-items:flex-start; gap:12px; }
.ckhead .ckt { flex:1; min-width:0; }
.ckhead .ckt b { color:var(--navy); font-size:16px; }
.ckno { flex:none; width:26px; height:26px; border-radius:50%; background:var(--blue-50);
  color:var(--navy); font-weight:700; text-align:center; line-height:26px; font-size:14px; }
.okbox { background:#e4f5e9; border:1px solid #bfe3ca; color:var(--ok); font-weight:600;
  border-radius:8px; padding:10px 14px; }

/* ---------- ตราโรงเรียน ---------- */
.crest { display: block; width: 92px; height: auto; margin: 0 auto 14px; }
.side .brand { display: flex; align-items: center; gap: 11px; }
.side .brand .blogo { flex: none; width: 38px; height: 38px; object-fit: contain; }
.side .brand .btext { min-width: 0; }
.side .brand .btext b { display: block; }

/* กล่องเตือนบนหน้าบังคับตั้งรหัสผ่านใหม่ */
.login .warnbox {
  background: #fff8e1;
  border: 1px solid #f0c36d;
  border-left: 4px solid #e0a615;
  color: #6b4e00;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
}

/* ---- ตารางกรอกหลายรายวิชาในหน้าเดียว ---- */
.tipcard { background: #f4f8ff; border-color: #cfe0fb; font-size: 14px; line-height: 1.7; }
.tipcard kbd { background: #fff; border: 1px solid #c9d3e0; border-bottom-width: 2px;
  border-radius: 4px; padding: 0 5px; font-size: 12px; }
table.memo.inline td.gin { padding: 2px; }
table.memo.inline input.gi {
  width: 100%; min-width: 0; box-sizing: border-box; text-align: center;
  padding: 6px 2px; border: 1px solid #d5dde8; border-radius: 5px;
  font-size: 15px; background: #fff; -moz-appearance: textfield;
}
table.memo.inline input.gi::-webkit-outer-spin-button,
table.memo.inline input.gi::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
table.memo.inline input.gi:focus { outline: 2px solid var(--navy-3, #3b6fd8); border-color: transparent;
  background: #fffbe6; }
table.memo.inline tr.dirty td { background: #fffdf2; }
table.memo.inline tr.bad td { background: #fff4f4; }
table.memo.inline td.chk { white-space: normal; font-size: 12px; line-height: 1.5; text-align: left; }
table.memo.inline td.chk .pill { display: inline-block; margin: 1px 0; }
table.memo.inline input.reason { width: 100%; box-sizing: border-box; margin-top: 3px;
  font-size: 12px; padding: 3px 5px; border: 1px solid #f0c36d; border-radius: 4px; }
table.memo.inline .ierr { color: #b42318; font-size: 12px; margin-top: 2px; }
.pill.blue { background: #e7efff; color: #1d4ed8; }
#ibar { position: sticky; bottom: 0; z-index: 5; }

/* ---- ช่องรหัสผ่าน ปุ่มดูรหัส และกฎรหัสผ่าน ---- */
.pwwrap { position: relative; }
.pwwrap input { width: 100%; box-sizing: border-box; padding-right: 44px; }
.pwwrap .eye {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  width: 36px; height: 36px; padding: 0; display: flex; align-items: center; justify-content: center;
  background: transparent; border: 0; box-shadow: none; color: #6b7a90; cursor: pointer; border-radius: 6px;
}
.pwwrap .eye:hover { background: #eef2f7; color: var(--navy); }
.pwrules { background: #f7f9fc; border: 1px solid #e1e7ef; border-radius: 8px;
  padding: 10px 12px; margin: 4px 0 16px; font-size: 14px; }
.pwrules .pwr-h { font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.pwrules .pwr { display: flex; align-items: center; gap: 8px; color: #6b7a90; line-height: 1.8; }
.pwrules .pwr .dot { width: 16px; height: 16px; border-radius: 50%; border: 2px solid #c3ccd8;
  flex: none; box-sizing: border-box; position: relative; }
.pwrules .pwr.ok { color: var(--ok); }
.pwrules .pwr.ok .dot { background: var(--ok); border-color: var(--ok); }
.pwrules .pwr.ok .dot::after { content: ''; position: absolute; left: 4px; top: 1px; width: 4px; height: 8px;
  border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.pwrules .pwr-tip { margin-top: 6px; font-size: 13px; color: #6b7a90; }
.pwrules code { background: #fff; border: 1px solid #e1e7ef; padding: 0 4px; border-radius: 4px; }
.pwrules.shake { animation: pwshake .4s; border-color: #f0a3a3; background: #fff6f6; }
@keyframes pwshake { 20%, 60% { transform: translateX(-6px); } 40%, 80% { transform: translateX(6px); } }

/* รายชื่อย้ายออกรวมรายระดับ */
details summary { cursor: pointer; color: var(--navy); font-weight: 600; }
table.mini { margin-top: 8px; width: 100%; font-size: 13px; }
table.mini td { padding: 3px 8px; border-bottom: 1px solid #eef1f5; }

/* ปุ่มย้อนกลับ และสถานะการบันทึกข้างช่อง */
.backbar { margin-bottom: 6px; }
.backbar button { display: inline-flex; align-items: center; gap: 6px; }
.saved { display: block; font-size: 12px; margin-top: 3px; color: var(--muted); }
.saved.ok { color: var(--ok); font-weight: 600; }
.saved.bad { color: var(--bad); }

/* =====================================================================
   หน้าแรกของครู — จุดเด่นคือกระดาษบันทึกข้อความที่ติ๊กครบทีละวิชา
   ===================================================================== */
:root {
  --gold: #c39a2c;          /* สีทองจากตราโรงเรียน */
  --paper: #fffdf8;         /* ใช้เฉพาะกระดาษบันทึกข้อความ */
  --stamp: #b3261e;         /* สีตราประทับเอกสารราชการ */
  --dots: #b9c3cf;
}
.th-hero {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 470px); gap: 28px;
  align-items: start; margin: 4px 0 22px;
}
.th-term {
  display: inline-block; font-size: 13.5px; font-weight: 600; color: var(--navy);
  border-bottom: 2px solid var(--gold); padding-bottom: 3px; margin-bottom: 14px;
}
.th-hello {
  font-size: 22px; font-weight: 600; color: var(--muted); line-height: 1.25; margin: 0 0 10px;
  letter-spacing: 0;
}
.th-hello span {
  display: block; font-size: 44px; font-weight: 800; color: var(--navy);
  letter-spacing: -1px; line-height: 1.15;
}
.th-line { font-size: 18px; color: var(--ink); margin: 0 0 18px; max-width: 34em; }
.th-cta {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  background: var(--navy); color: #fff; font-weight: 700; font-size: 17px;
  padding: 12px 22px; border-radius: 10px; box-shadow: 0 6px 16px rgba(23, 54, 93, .22);
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.th-cta:hover { background: var(--navy-2); transform: translateY(-1px); box-shadow: 0 10px 22px rgba(23, 54, 93, .26); }
.th-cta:focus-visible, .steps a:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.th-cta span { transition: transform .15s ease; }
.th-cta:hover span { transform: translateX(3px); }

/* ขั้นตอน 3 ขั้น (ลำดับงานจริง) */
.steps { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 4px; }
.step { display: grid; grid-template-columns: 34px 1fr; gap: 12px; padding: 10px 0; position: relative; }
.step + .step::before {
  content: ""; position: absolute; left: 16px; top: -12px; height: 18px; border-left: 2px dotted var(--dots);
}
.step-n {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: 15px; border: 2px solid var(--dots); color: var(--muted); background: #fff;
}
.step.now .step-n { border-color: var(--navy); color: #fff; background: var(--navy); }
.step.done .step-n { border-color: var(--ok); color: #fff; background: var(--ok); }
.step-t { font-weight: 700; font-size: 16px; color: var(--ink); line-height: 34px; }
.step.wait .step-t { color: var(--muted); }
.step-d { font-size: 14px; color: var(--muted); margin-top: -4px; }
.steps a { font-size: 14px; font-weight: 600; color: var(--navy-2); }
.step-links { display: flex; flex-wrap: wrap; gap: 4px 16px; margin-top: 2px; }
.step > div > a { display: inline-block; margin-top: 2px; }

/* กระดาษบันทึกข้อความ */
.memo-slip {
  background: var(--paper); border: 1px solid #e8e1cf; border-radius: 4px;
  padding: 22px 24px 20px; position: relative;
  box-shadow: 0 1px 0 #efe8d6, 0 14px 30px rgba(16, 36, 64, .10), 0 2px 6px rgba(16, 36, 64, .06);
  transform: rotate(.6deg);
}
.memo-slip::before {        /* เส้นทองบนหัวกระดาษ */
  content: ""; position: absolute; left: 24px; right: 24px; top: 0; height: 4px; background: var(--gold);
  border-radius: 0 0 3px 3px;
}
.ms-head { display: flex; gap: 12px; align-items: center; margin-bottom: 14px; }
.ms-head img { width: 46px; height: 46px; object-fit: contain; }
.ms-title { font-size: 24px; font-weight: 800; color: var(--ink); line-height: 1.1; }
.ms-sub { font-size: 13px; color: var(--muted); }
.ms-lines { list-style: none; margin: 0; padding: 0; }
.ml {
  display: flex; align-items: baseline; gap: 8px; font-size: 14.5px; padding: 6px 0;
  animation: ml-in .35s ease both; animation-delay: calc(var(--i, 0) * 45ms);
}
.ml-room { font-weight: 700; color: var(--navy); width: 44px; flex: none; }
.ml-subj { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; color: var(--ink); }
.ml-dots { flex: 1 1 20px; min-width: 16px; border-bottom: 2px dotted var(--dots); transform: translateY(-4px); }
.ml-state { flex: none; font-size: 13px; font-weight: 700; }
.ml.done .ml-state { color: var(--ok); }
.ml.done .ml-state i { font-style: normal; }
.ml.todo .ml-state { color: var(--muted); font-weight: 600; }
.ml.todo .ml-subj { color: var(--muted); }
.ml.names .ml-state { color: var(--stamp); }
.ml.peer .ml-state { color: var(--navy-2); font-weight: 600; }
.ml.more { color: var(--muted); font-size: 13.5px; justify-content: flex-end; }
.ms-empty { color: var(--muted); }
.ms-sign { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-top: 18px; }
.ms-sigline { flex: 1; text-align: center; font-size: 13.5px; }
.ms-dots { display: block; border-bottom: 2px dotted var(--dots); height: 20px; margin: 0 8px 4px; }
.ms-who { font-weight: 700; color: var(--ink); }
.ms-role { color: var(--muted); font-size: 12.5px; }
.stamp {
  width: 116px; height: 116px; border-radius: 50%; flex: none; display: grid; place-content: center;
  text-align: center; line-height: 1.1; transform: rotate(-12deg);
}
.stamp span { font-size: 21px; font-weight: 800; }
.stamp small { font-size: 11.5px; font-weight: 700; letter-spacing: .5px; margin-top: 2px; }
.stamp.on {
  color: var(--stamp); border: 3px solid var(--stamp); box-shadow: inset 0 0 0 3px var(--paper), inset 0 0 0 5px var(--stamp);
  opacity: .88; animation: stamp-in .5s cubic-bezier(.2, 1.6, .4, 1) .45s both;
}
.stamp.off { color: var(--muted); border: 2px dashed var(--dots); }
.stamp.off span { font-size: 28px; color: var(--navy); }
@keyframes ml-in { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes stamp-in {
  0% { opacity: 0; transform: rotate(-12deg) scale(1.9); }
  100% { opacity: .88; transform: rotate(-12deg) scale(1); }
}

/* สัดส่วนผลการเรียน */
.dist { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px 22px 16px; }
.dist-h { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 6px 16px; }
.dist-h h3 { margin: 0; }
.dist-sum { color: var(--muted); font-size: 15px; }
.dist-sum b { color: var(--ink); font-size: 17px; }
.bar { display: flex; height: 14px; border-radius: 7px; overflow: hidden; margin: 14px 0 12px; gap: 2px; background: var(--line-soft); }
.b-good { background: #1f7a4d; } .b-fair { background: #7fb069; } .b-poor { background: #e0a526; }
.b-fail { background: #c0392b; } .b-ms { background: #6b4e9b; }
.legend { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 22px; font-size: 14px; }
.legend li { display: flex; align-items: center; gap: 6px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.legend span { color: var(--muted); font-size: 13px; }
.dist.empty p { color: var(--muted); margin: 6px 0 0; }

/* กระดาษต้องการที่ราว 440px ถ้าจอไม่พอให้คอลัมน์ซ้ายกว้างสบาย ให้เรียงลงมาแทน */
@media (max-width: 1180px) {
  .th-hero { grid-template-columns: 1fr; }
  .memo-slip { max-width: 560px; }
}
@media (max-width: 600px) {
  .memo-slip { transform: none; padding: 18px 16px 16px; }
  .memo-slip::before { left: 16px; right: 16px; }
  .th-hello span { font-size: 34px; }
  .th-line { font-size: 16.5px; }
  .ml-room { width: 40px; }
  .stamp { width: 96px; height: 96px; }
  .stamp span { font-size: 18px; }
  .stamp.off span { font-size: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  .ml, .stamp.on { animation: none; }
  .th-cta, .th-cta span { transition: none; }
}

/* ปุ่มสลับโหมด */
.theme-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 14px;
}
.side .foot .side-theme { margin-top: 10px; width: 100%; }
.side .foot #logoutBtn { margin-top: 8px; }
.foot-role { color: #b9cbe4; font-size: 12px; }
.login { position: relative; }
.login-theme {
  position: absolute; top: 16px; right: 16px;
  background: rgba(255, 255, 255, .7); color: var(--navy); border: 1px solid var(--line);
  box-shadow: none; padding: 7px 14px;
}
.bandline .b.ok { background: #e4f5e9; }
.bandline .b.grey { background: #eef1f5; }

/* =====================================================================
   โหมดกลางคืน
   ใช้โทนน้ำเงินกลางคืนต่อจากสีหลักของโรงเรียน ไม่ใช้ดำสนิทเพราะอ่านนานแล้วแสบตา
   เอกสารสำหรับพิมพ์ (/print/...) ไม่ใช้ไฟล์นี้ จึงยังเป็นกระดาษขาวเสมอ
   ===================================================================== */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0e1520;
  --surface: #151f2d;
  --surface-2: #1a2637;
  --surface-3: #22324a;
  --navy: #b4cdf0;          /* ใช้เป็นสีหัวข้อ ต้องสว่าง */
  --navy-2: #86b4ee;        /* ลิงก์ */
  --navy-3: #0a111b;
  --btn: #2f64ad;           /* พื้นปุ่มหลัก แยกจากสีหัวข้อ ตัวหนังสือขาวบนปุ่มยังชัด */
  --btn-hover: #3a74c4;
  --blue-50: #1b2a3f;
  --blue-100: #2a4263;
  --line: #2c3b51;
  --line-soft: #223146;
  --ink: #e4ebf4;
  --muted: #9aa8ba;
  --ok: #56c984;
  --warn: #e8ac55;
  --bad: #f2796f;
  --gold: #d8b453;
  --paper: #1a2332;
  --stamp: #ee5f56;
  --dots: #4b5c73;
  --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 3px 10px rgba(0, 0, 0, .25);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .35), 0 10px 26px rgba(0, 0, 0, .35);
}
:root[data-theme="dark"] .side { background: linear-gradient(180deg, #13203a 0%, #0a111b 100%); }
:root[data-theme="dark"] .side a.active { background: var(--surface-3); color: #fff; box-shadow: none; }
:root[data-theme="dark"] .side a.active::before { background: var(--gold); }

/* พื้นผิวที่เคยเป็นสีขาว */
:root[data-theme="dark"] .topbar .term,
:root[data-theme="dark"] .card,
:root[data-theme="dark"] .stat,
:root[data-theme="dark"] .tablewrap,
:root[data-theme="dark"] .savebar,
:root[data-theme="dark"] .modal .box,
:root[data-theme="dark"] .ckbox,
:root[data-theme="dark"] .dist,
:root[data-theme="dark"] .login .box,
:root[data-theme="dark"] .reqchips span,
:root[data-theme="dark"] .step-n { background: var(--surface); }
:root[data-theme="dark"] .savebar { box-shadow: 0 -3px 16px rgba(0, 0, 0, .45); }

/* ตาราง */
:root[data-theme="dark"] table:not(.memo) tbody tr:nth-child(even) td { background: #172231; }
:root[data-theme="dark"] tr.total td,
:root[data-theme="dark"] table:not(.memo) tbody tr.total:nth-child(even) td { background: var(--surface-3); }
:root[data-theme="dark"] table.memo th,
:root[data-theme="dark"] table.memo td { border-color: #34465f; }
:root[data-theme="dark"] table.memo tbody tr:not(.hd):not(.sum):hover td { background: #1d2c42; }
:root[data-theme="dark"] table.memo tr.todo td { color: #74839a; }
:root[data-theme="dark"] table.memo tr.sum td { background: var(--surface-3); }
:root[data-theme="dark"] table.memo tr.sum:first-of-type td { border-top-color: #5a7496; }
:root[data-theme="dark"] table.mini td { border-bottom-color: var(--line-soft); }

/* ป้ายสถานะ */
:root[data-theme="dark"] .pill.ok { background: #16372a; }
:root[data-theme="dark"] .pill.bad { background: #3d1f20; }
:root[data-theme="dark"] .pill.warn { background: #3b2c14; }
:root[data-theme="dark"] .pill.grey { background: #243144; color: var(--muted); }
:root[data-theme="dark"] .pill.blue { background: #1c2e4d; color: #9cc3ff; }

/* ช่องกรอกและปุ่ม */
:root[data-theme="dark"] input,
:root[data-theme="dark"] select,
:root[data-theme="dark"] textarea { background: #101925; color: var(--ink); border-color: var(--line); }
:root[data-theme="dark"] input::placeholder,
:root[data-theme="dark"] textarea::placeholder { color: #6f7e93; }
:root[data-theme="dark"] input:hover,
:root[data-theme="dark"] select:hover,
:root[data-theme="dark"] textarea:hover { border-color: #3e5270; }
:root[data-theme="dark"] input:focus,
:root[data-theme="dark"] select:focus,
:root[data-theme="dark"] textarea:focus { border-color: var(--navy-2); box-shadow: 0 0 0 3px rgba(134, 180, 238, .22); }
:root[data-theme="dark"] button { background: var(--btn); border-color: var(--btn); box-shadow: none; }
:root[data-theme="dark"] button:hover { background: var(--btn-hover); filter: none; }
:root[data-theme="dark"] button.ghost { background: transparent; color: #9cc3ff; border-color: #3a5680; }
:root[data-theme="dark"] button.ghost:hover { background: #1b2a40; }
:root[data-theme="dark"] button.plain { background: transparent; color: var(--muted); border-color: var(--line); }
:root[data-theme="dark"] button.danger { background: transparent; color: var(--bad); border-color: #6a3432; }
:root[data-theme="dark"] .side .foot button { background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .14); }
:root[data-theme="dark"] .side .foot button:hover { background: rgba(255, 255, 255, .16); }
:root[data-theme="dark"] .login-theme { background: var(--surface); color: var(--ink); border-color: var(--line); }

/* กล่องข้อความ */
:root[data-theme="dark"] .err { background: #3a1c1c; border-color: #6a3432; color: #ffb4ab; }
:root[data-theme="dark"] .ok-box,
:root[data-theme="dark"] .okbox { background: #15352a; border-color: #2c6b4a; color: #a5e3bd; }
:root[data-theme="dark"] .login { background: linear-gradient(160deg, #0f1a2b 0%, #0c1420 50%, #111d30 100%); }
:root[data-theme="dark"] .login .warnbox { background: #33290f; border-color: #6d5520; border-left-color: var(--gold); color: #f1d38b; }
:root[data-theme="dark"] .tipcard { background: #142238; border-color: #27416a; }
:root[data-theme="dark"] .tipcard kbd { background: var(--surface-2); border-color: var(--line); color: var(--ink); }
:root[data-theme="dark"] .ckbox.warn { border-left-color: var(--warn); }
:root[data-theme="dark"] .ckbox.ok { border-left-color: var(--ok); }
:root[data-theme="dark"] .ckbox.bad { border-left-color: var(--bad); }

/* ฟอร์มกรอกรายละเอียด */
:root[data-theme="dark"] .bandline .b { background: var(--blue-50); }
:root[data-theme="dark"] .bandline .b.warn { background: #3b2c14; }
:root[data-theme="dark"] .bandline .b.ok { background: #16372a; }
:root[data-theme="dark"] .bandline .b.grey { background: #243144; }
:root[data-theme="dark"] .bandbox { background: var(--surface-2); }
:root[data-theme="dark"] .bandbox[data-band="good"] { background: #13291f; border-color: #25543b; }
:root[data-theme="dark"] .bandbox[data-band="fail"] { background: #2b1818; border-color: #5c2e2c; }
:root[data-theme="dark"] .bandbox[data-band="ms"] { background: #2b2314; border-color: #5b4724; }
:root[data-theme="dark"] .reqchips span.ok { background: #16372a; border-color: #2c6b4a; }
:root[data-theme="dark"] .reqchips span.bad { background: #3b2c14; border-color: #6d5520; }

/* ตารางกรอกหน้าเดียว */
:root[data-theme="dark"] table.memo.inline input.gi { background: #101925; border-color: #2e3d53; color: var(--ink); }
:root[data-theme="dark"] table.memo.inline input.gi:focus { background: #2a2512; outline-color: var(--gold); }
:root[data-theme="dark"] table.memo.inline tr.dirty td { background: #1f1d14; }
:root[data-theme="dark"] table.memo.inline tr.bad td { background: #2a1717; }
:root[data-theme="dark"] table.memo.inline input.reason { border-color: #7a5d22; }
:root[data-theme="dark"] table.memo.inline .ierr { color: #ff9d94; }

/* รหัสผ่าน */
:root[data-theme="dark"] .pwwrap .eye { color: var(--muted); background: transparent; }
:root[data-theme="dark"] .pwwrap .eye:hover { background: var(--surface-3); color: var(--ink); }
:root[data-theme="dark"] .pwrules { background: var(--surface-2); border-color: var(--line); }
:root[data-theme="dark"] .pwrules .pwr,
:root[data-theme="dark"] .pwrules .pwr-tip { color: var(--muted); }
:root[data-theme="dark"] .pwrules .pwr.ok { color: var(--ok); }
:root[data-theme="dark"] .pwrules .pwr .dot { border-color: #4b5c73; }
:root[data-theme="dark"] .pwrules code { background: var(--surface); border-color: var(--line); color: var(--ink); }
:root[data-theme="dark"] .pwrules.shake { background: #2e1818; border-color: #7a3a36; }

/* หน้าแรกของครู */
:root[data-theme="dark"] .th-cta { background: var(--btn); box-shadow: 0 6px 18px rgba(0, 0, 0, .45); }
:root[data-theme="dark"] .th-cta:hover { background: var(--btn-hover); }
:root[data-theme="dark"] .step.now .step-n { background: var(--btn); border-color: var(--btn); }
:root[data-theme="dark"] .memo-slip {
  border-color: #2e3b4e;
  box-shadow: 0 14px 30px rgba(0, 0, 0, .45), 0 2px 6px rgba(0, 0, 0, .35);
}
:root[data-theme="dark"] .stamp.on { opacity: .95; }
:root[data-theme="dark"] .b-good { background: #2e9a63; }
:root[data-theme="dark"] .b-fair { background: #8cc276; }
:root[data-theme="dark"] .step.done .step-n { background: var(--ok); border-color: var(--ok); color: #0e1520; }

/* ช่วงรับกรอก */
.lockbar {
  background: #fdeceb; border: 1px solid #f2c4c0; border-left: 5px solid var(--bad);
  color: #7d1a13; border-radius: 10px; padding: 11px 14px; margin: 0 0 14px; font-size: 15px;
}
.due {
  display: inline-block; margin: 0 0 12px 12px; font-size: 13.5px; color: var(--navy);
  background: var(--blue-50); border-radius: 999px; padding: 3px 12px; vertical-align: top;
}
.due.soon { background: #fdf3e3; color: var(--warn); }
.due.closed { background: #fdeceb; color: var(--bad); font-weight: 700; }
table.memo.inline input.gi:disabled { background: transparent; border-color: transparent; color: var(--ink); }
:root[data-theme="dark"] .lockbar { background: #3a1c1c; border-color: #6a3432; border-left-color: var(--bad); color: #ffb4ab; }
:root[data-theme="dark"] .due.soon { background: #3b2c14; }
:root[data-theme="dark"] .due.closed { background: #3d1f20; }
@media (max-width: 600px) { .due { margin-left: 0; display: table; } }
/* แถวรวม/ร้อยละในตารางกรอก ตัวเลขต้องไม่ล้นช่องแคบ */
table.memo.inline tr.sum td { font-size: 13px; padding-left: 2px; padding-right: 2px; }
table.memo.inline td.act { padding: 2px 4px; }
table.memo.inline td.act button { padding: 3px 8px; font-size: 13px; }