/* ==========================================================================
   Mathtter Worksheet — Admin
   ========================================================================== */
:root{
  --ink:#0a0d0c; --ink-2:#1d2422; --ink-3:#5b6764; --ink-4:#8b9794;
  --green:#0f7a4d; --green-dark:#0b5c3a; --green-deep:#123f2e;
  --green-soft:#edf6f1; --green-line:#cfe6da; --green-bright:#34c98a;
  --bg:#ffffff; --bg-soft:#f6f8f7; --bg-tint:#fbfcfb; --surface:#fcfcfb;
  --line:rgba(10,13,12,.09); --line-2:rgba(10,13,12,.16);
  --blue:#2563a8; --blue-soft:#eaf1fa;
  --orange:#c47510; --orange-soft:#fdf2e3;
  --red:#c0392f; --red-soft:#fcedeb;
  --r-sm:10px; --r:14px; --r-lg:20px;
  --sh-1:0 1px 2px rgba(10,13,12,.05);
  --sh-2:0 4px 16px rgba(10,13,12,.07),0 1px 3px rgba(10,13,12,.05);
  --sh-3:0 18px 50px rgba(10,13,12,.16);
  --ease:cubic-bezier(.32,.72,0,1);
  --side-w:246px;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
body{
  font-family:'Inter','IBM Plex Sans Thai',-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--ink);background:var(--bg-soft);font-size:14px;line-height:1.6;
  -webkit-font-smoothing:antialiased;letter-spacing:-.005em;
}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.25;letter-spacing:-.028em;font-weight:700}
.ic{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.muted{color:var(--ink-4)}
.num{font-variant-numeric:tabular-nums}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:999px;font-weight:600;font-size:13.5px;white-space:nowrap;
  transition:transform .2s var(--ease),background .2s,box-shadow .2s;
}
.btn:active{transform:scale(.96)}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-dark)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-2)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line-2)}
.btn-ghost:hover{border-color:var(--ink);background:var(--bg-soft)}
.btn-danger{background:var(--red-soft);color:var(--red)}
.btn-danger:hover{background:var(--red);color:#fff}
.btn-sm{height:34px;padding:0 14px;font-size:12.5px}
.btn-block{width:100%}

/* ══════════ เข้าสู่ระบบ ══════════ */
.gate{position:fixed;inset:0;z-index:200;display:grid;place-items:center;background:var(--ink);padding:24px}
.gate-card{
  width:min(370px,100%);background:#fff;border-radius:24px;padding:38px 32px;
  display:flex;flex-direction:column;gap:12px;text-align:center;box-shadow:var(--sh-3);
}
.gate-mark{
  width:52px;height:52px;border-radius:15px;background:var(--green-deep);color:#fff;
  display:grid;place-items:center;font-size:26px;font-weight:800;margin:0 auto 6px;
}
.gate-card h1{font-size:22px}
.gate-card p{font-size:13px;color:var(--ink-4);margin-bottom:10px}
.gate-card input{
  height:46px;padding:0 16px;border-radius:13px;border:1px solid var(--line-2);
  outline:none;font-size:14.5px;text-align:center;transition:border-color .2s,box-shadow .2s;
}
.gate-card input:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(15,122,77,.12)}
.gate-hint{font-size:11.5px;color:var(--ink-4);margin-top:2px}
.gate-hint b{color:var(--ink-2)}
.gate.shake .gate-card{animation:shake .4s}
@keyframes shake{0%,100%{transform:none}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}

/* ══════════ โครงหลัก ══════════ */
.shell{display:grid;grid-template-columns:var(--side-w) minmax(0,1fr);min-height:100vh}

.side{
  background:var(--ink);color:rgba(255,255,255,.62);
  display:flex;flex-direction:column;position:sticky;top:0;height:100vh;
}
.side-brand{display:flex;align-items:center;gap:11px;padding:22px 20px 20px}
.side-mark{
  width:36px;height:36px;border-radius:11px;background:var(--green);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:19px;
}
.side-brand div{display:flex;flex-direction:column;line-height:1.08}
.side-brand b{color:#fff;font-size:15px;font-weight:800;letter-spacing:-.02em}
.side-brand i{font-style:normal;font-size:9px;letter-spacing:.3em;color:var(--green-bright)}

.side-nav{display:flex;flex-direction:column;gap:2px;padding:8px 12px;flex:1;overflow-y:auto}
.side-nav button{
  display:flex;align-items:center;gap:11px;padding:10px 13px;border-radius:11px;
  font-size:13.5px;font-weight:500;color:rgba(255,255,255,.62);text-align:left;
  transition:background .18s,color .18s;
}
.side-nav button:hover{background:rgba(255,255,255,.07);color:#fff}
.side-nav button.on{background:var(--green);color:#fff;font-weight:600}
.side-pill{
  margin-left:auto;min-width:20px;height:20px;padding:0 6px;border-radius:999px;
  background:var(--orange);color:#fff;font-size:11px;font-weight:700;
  display:grid;place-items:center;
}
.side-nav button.on .side-pill{background:rgba(255,255,255,.25)}
.side-foot{padding:12px;border-top:1px solid rgba(255,255,255,.09);display:flex;flex-direction:column;gap:2px}
.side-foot a,.side-foot button{
  display:flex;align-items:center;gap:11px;padding:10px 13px;border-radius:11px;
  font-size:12.5px;color:rgba(255,255,255,.55);transition:background .18s,color .18s;
}
.side-foot a:hover,.side-foot button:hover{background:rgba(255,255,255,.07);color:#fff}

.main{min-width:0;display:flex;flex-direction:column}
.topbar{
  position:sticky;top:0;z-index:20;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:20px 30px;background:rgba(246,248,247,.85);
  backdrop-filter:saturate(180%) blur(18px);border-bottom:1px solid var(--line);
}
.topbar h1{font-size:22px}
.topbar p{font-size:13px;color:var(--ink-4);margin-top:2px}
.topbar-act{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.content{padding:24px 30px 60px;flex:1}

/* ══════════ การ์ด ══════════ */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.card-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:16px 20px;border-bottom:1px solid var(--line);
}
.card-head h2{font-size:15px}
.card-head p{font-size:12.5px;color:var(--ink-4);margin-top:2px}
.card-body{padding:20px}

.grid{display:grid;gap:16px}
.g-4{grid-template-columns:repeat(4,1fr)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-21{grid-template-columns:1.55fr 1fr;align-items:start}
.mb{margin-bottom:16px}

/* ── สถิติสรุป (ค่าเดี่ยว ไม่ต้องเป็นกราฟ) ── */
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px 20px}
.stat-top{display:flex;align-items:center;gap:9px;margin-bottom:10px}
.stat-top .ic{color:var(--green);width:16px;height:16px}
.stat-top span{font-size:12.5px;color:var(--ink-3);font-weight:500}
.stat b{display:block;font-size:29px;font-weight:800;letter-spacing:-.035em;line-height:1.1}
.stat i{font-style:normal;display:block;font-size:12px;color:var(--ink-4);margin-top:5px}
.stat i em{font-style:normal;font-weight:600}
.up{color:var(--green)}
.down{color:var(--red)}

/* ══════════ กราฟ ══════════ */
.chart{width:100%;height:auto;display:block;overflow:visible}
.grid-line{stroke:var(--line);stroke-width:1}
.axis-txt{fill:var(--ink-4);font-size:10.5px;font-family:'Inter',sans-serif;font-variant-numeric:tabular-nums}
.area-fill{fill:url(#gGreen)}
.area-line{fill:none;stroke:var(--green);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.dot-end{fill:var(--green);stroke:#fff;stroke-width:2}
.hover-band{fill:transparent;cursor:crosshair}
.crosshair{stroke:var(--ink-4);stroke-width:1;opacity:.5}
.cross-dot{fill:var(--green);stroke:#fff;stroke-width:2}

.barrow{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 12px;align-items:center;padding:7px 0}
.barrow-lab{font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.barrow-val{font-size:12.5px;font-weight:700;font-variant-numeric:tabular-nums;white-space:nowrap}
.barrow-track{grid-column:1/-1;height:8px;border-radius:4px;background:var(--bg-soft);overflow:hidden}
.barrow-fill{display:block;height:100%;border-radius:4px;background:var(--green);transition:width .5s var(--ease)}
.barrow:hover .barrow-fill{background:var(--green-dark)}

.chart-toggle{display:flex;gap:2px;background:var(--bg-soft);padding:3px;border-radius:9px}
.chart-toggle button{padding:5px 11px;border-radius:7px;font-size:12px;font-weight:600;color:var(--ink-4);transition:.18s}
.chart-toggle button.on{background:#fff;color:var(--ink);box-shadow:var(--sh-1)}

.tip{
  position:fixed;z-index:150;pointer-events:none;
  background:var(--ink);color:#fff;border-radius:10px;padding:9px 12px;
  font-size:12px;line-height:1.55;box-shadow:var(--sh-2);white-space:nowrap;
}
.tip b{font-variant-numeric:tabular-nums}
.tip span{display:block;font-size:11px;opacity:.65}

/* ══════════ ตาราง ══════════ */
.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
th{
  text-align:left;font-size:11.5px;font-weight:600;color:var(--ink-4);
  padding:11px 14px;border-bottom:1px solid var(--line);white-space:nowrap;
  background:var(--bg-tint);position:sticky;top:0;
}
td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:0}
tbody tr{transition:background .16s}
tbody tr:hover{background:var(--bg-tint)}
.t-r{text-align:right}
.t-c{text-align:center}
.t-num{font-variant-numeric:tabular-nums;font-weight:600;white-space:nowrap}
.t-main{font-weight:600;letter-spacing:-.015em}
.t-sub{font-size:11.5px;color:var(--ink-4);margin-top:2px}
.t-act{display:flex;gap:6px;justify-content:flex-end}
.icon-btn{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  color:var(--ink-3);border:1px solid var(--line);background:#fff;transition:.18s;
}
.icon-btn:hover{border-color:var(--ink);color:var(--ink)}
.icon-btn.danger:hover{border-color:var(--red);background:var(--red);color:#fff}

.badge{
  display:inline-flex;align-items:center;gap:5px;
  padding:3px 9px;border-radius:7px;font-size:11.5px;font-weight:600;white-space:nowrap;
}
.badge i{width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.b-pending{background:var(--orange-soft);color:var(--orange)}
.b-paid{background:var(--green-soft);color:var(--green-dark)}
.b-rejected{background:var(--red-soft);color:var(--red)}
.b-easy{background:var(--green-soft);color:var(--green-dark)}
.b-mid{background:var(--orange-soft);color:var(--orange)}
.b-hard{background:var(--red-soft);color:var(--red)}
.b-neutral{background:var(--bg-soft);color:var(--ink-3)}
.b-blue{background:var(--blue-soft);color:var(--blue)}

/* ── การ์ดสไลด์ปกหน้าแรก ── */
.slide-cards{display:flex;flex-direction:column;gap:14px}
.slide-card{
  display:grid;grid-template-columns:260px minmax(0,1fr) auto;gap:20px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:14px;
  transition:opacity .2s,border-color .2s;
}
.slide-card.off{opacity:.5}
.slide-card.off:hover{opacity:.8}
.slide-card-img{position:relative;border-radius:var(--r);overflow:hidden;background:var(--bg-soft);aspect-ratio:2.4/1}
.slide-card-img img{display:block;width:100%;height:100%;object-fit:cover}
.slide-card-badge{
  position:absolute;top:8px;left:8px;width:24px;height:24px;border-radius:8px;
  background:rgba(10,13,12,.72);color:#fff;font-size:12px;font-weight:700;
  display:grid;place-items:center;backdrop-filter:blur(6px);
}
.slide-card-align{
  position:absolute;bottom:8px;left:8px;padding:3px 9px;border-radius:7px;
  background:rgba(10,13,12,.72);color:#fff;font-size:10.5px;font-weight:600;backdrop-filter:blur(6px);
}
.slide-card-body{min-width:0}
.slide-eyebrow{display:block;font-size:11.5px;color:var(--green-dark);font-weight:600;margin-bottom:5px}
.slide-card-body b{display:block;font-size:17px;letter-spacing:-.025em;margin-bottom:6px}
.slide-card-body b em{font-style:normal;color:var(--green)}
.slide-lead{display:block;font-size:12.5px;color:var(--ink-4);line-height:1.6;margin-bottom:9px}
.slide-btns{display:flex;gap:6px;flex-wrap:wrap}
.slide-card-act{display:flex;flex-direction:column;align-items:flex-end;gap:12px}

/* ── ตัวเลือกภาพในฟอร์ม ── */
.img-pick{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.img-opt{position:relative;cursor:pointer;display:block}
.img-opt input{position:absolute;opacity:0;pointer-events:none}
.img-opt img{
  display:block;width:100%;aspect-ratio:2.4/1;object-fit:cover;
  border-radius:var(--r-sm);border:2px solid var(--line);transition:.2s;
}
.img-opt span{display:block;font-size:11px;color:var(--ink-4);margin-top:5px;text-align:center}
.img-opt:hover img{border-color:var(--line-2)}
.img-opt input:checked+img{border-color:var(--green);box-shadow:0 0 0 3px rgba(15,122,77,.16)}
.img-opt input:checked~span{color:var(--green-dark);font-weight:600}

@media (max-width:820px){
  .slide-card{grid-template-columns:1fr;gap:12px}
  .slide-card-act{flex-direction:row;align-items:center;justify-content:space-between;width:100%}
  .img-pick{grid-template-columns:1fr}
}

.empty{text-align:center;padding:60px 20px;color:var(--ink-4)}
.empty b{display:block;color:var(--ink-2);font-size:15px;margin:10px 0 5px}
.empty .ic{width:36px;height:36px;color:var(--line-2)}

/* ══════════ ฟอร์ม ══════════ */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12px;font-weight:600;color:var(--ink-3)}
.field small{font-size:11px;color:var(--ink-4)}
.field input,.field select,.field textarea{
  height:42px;padding:0 14px;border-radius:11px;border:1px solid var(--line-2);
  background:#fff;outline:none;font-size:13.5px;transition:border-color .2s,box-shadow .2s;width:100%;
}
.field textarea{height:auto;padding:11px 14px;resize:vertical;min-height:76px;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(15,122,77,.1)}
.field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 4l4 4 4-4' fill='none' stroke='%238b9794' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 13px center;background-size:12px;padding-right:34px}
.search-in{position:relative;flex:1;min-width:200px;max-width:340px}
.search-in input{height:40px;padding-left:38px}
.search-in .ic{position:absolute;left:13px;top:11px;color:var(--ink-4)}

.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .wide{grid-column:1/-1}
.form-act{display:flex;gap:10px;justify-content:flex-end;margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}

.switch{display:flex;align-items:center;gap:12px;cursor:pointer}
.switch input{display:none}
.switch-ui{
  width:44px;height:26px;border-radius:999px;background:var(--line-2);flex:none;
  position:relative;transition:background .24s var(--ease);
}
.switch-ui::after{
  content:'';position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;
  background:#fff;box-shadow:var(--sh-1);transition:transform .24s var(--ease);
}
.switch input:checked+.switch-ui{background:var(--green)}
.switch input:checked+.switch-ui::after{transform:translateX(18px)}
.switch-txt b{display:block;font-size:13.5px;font-weight:600}
.switch-txt span{font-size:12px;color:var(--ink-4)}

.drop{
  border:1.5px dashed var(--line-2);border-radius:var(--r);padding:22px;text-align:center;
  cursor:pointer;transition:.2s;
}
.drop:hover{border-color:var(--green);background:var(--green-soft)}
.drop b{display:block;font-size:13.5px;margin-bottom:3px}
.drop span{font-size:12px;color:var(--ink-4)}

.note{
  display:flex;gap:11px;padding:13px 15px;border-radius:var(--r);
  background:var(--green-soft);border:1px solid var(--green-line);font-size:12.5px;color:var(--green-deep);line-height:1.7;
}
.note .ic{color:var(--green-dark);margin-top:2px}
.note-warn{background:var(--orange-soft);border-color:#f0d9b0;color:#8a5a0d}
.note-warn .ic{color:var(--orange)}

/* ══════════ Modal / Toast ══════════ */
.modal{position:fixed;inset:0;z-index:160;display:grid;place-items:center;padding:22px}
.modal-back{position:absolute;inset:0;background:rgba(10,13,12,.5);backdrop-filter:blur(6px)}
.modal-card{
  position:relative;width:min(600px,100%);max-height:88vh;overflow-y:auto;
  background:#fff;border-radius:24px;box-shadow:var(--sh-3);padding:30px;
  animation:rise .3s var(--ease);
}
@keyframes rise{from{opacity:0;transform:translateY(16px) scale(.985)}to{opacity:1;transform:none}}
.modal-card.wide{width:min(820px,100%)}
.modal-x{
  position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:50%;
  background:var(--bg-soft);color:var(--ink-3);font-size:13px;display:grid;place-items:center;transition:.18s;
}
.modal-x:hover{background:var(--line-2);color:#fff}
.modal-card h3{font-size:20px;margin-bottom:5px}
.modal-card>div>p{font-size:13px;color:var(--ink-4);margin-bottom:20px}

.toast{
  position:fixed;bottom:26px;left:50%;transform:translateX(-50%);z-index:200;
  display:flex;align-items:center;gap:10px;padding:12px 20px;border-radius:999px;
  background:var(--ink);color:#fff;font-size:13.5px;box-shadow:var(--sh-3);
  animation:tIn .3s var(--ease);
}
@keyframes tIn{from{opacity:0;transform:translate(-50%,12px)}to{opacity:1;transform:translate(-50%,0)}}
.toast .ic{color:var(--green-bright);width:17px;height:17px}

/* ══════════ RESPONSIVE ══════════ */
@media (max-width:1180px){
  .g-4{grid-template-columns:repeat(2,1fr)}
  .g-21,.g-3{grid-template-columns:1fr}
}
@media (max-width:900px){
  :root{--side-w:76px}
  .side-brand div,.side-nav button span:not(.side-pill),.side-foot a,.side-nav button{font-size:0}
  .side-nav button{justify-content:center;padding:12px}
  .side-nav button .ic{width:20px;height:20px}
  .side-brand{justify-content:center;padding:20px 0}
  .side-brand div{display:none}
  .side-foot a,.side-foot button{justify-content:center}
  .content,.topbar{padding-left:18px;padding-right:18px}
}
@media (max-width:680px){
  .g-4,.g-2{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .modal-card{padding:24px 18px}
  .topbar{padding:16px 18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}