/* ธีมเดียวกับระบบตารางเรียน / ปฏิทิน / จองห้อง (น้ำเงิน-เหลือง) */
:root{
  --bg:#F2F5FB; --surface:#FFFFFF; --sunk:#E7ECF6; --line:#D2DAEA; --fg:#111A33; --muted:#56617D;
  --accent:#1D3F9A; --accent-fg:#FFFFFF; --brand:#16337F; --brand-2:#1D3F9A; --brand-fg:#FFFFFF;
  --gold:#E2B33C; --gold-ink:#7A5A00; --ok:#0F7A4A; --danger:#B42318;
  --font-d:"Chakra Petch","IBM Plex Sans Thai",system-ui,sans-serif;
  --font-b:"IBM Plex Sans Thai","Noto Sans Thai",system-ui,sans-serif;
  --r:8px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font-b);font-size:15px;line-height:1.5}
[hidden]{display:none!important}
img{max-width:100%}
.wrap{max-width:1240px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}

header.top{background:linear-gradient(100deg,var(--brand),var(--brand-2));color:var(--brand-fg);border-bottom:4px solid var(--gold)}
header.top .wrap{display:flex;align-items:center;gap:12px;padding-block:12px}
.logo{height:48px;width:auto;flex:none;filter:drop-shadow(0 1px 2px rgba(0,0,0,.35))}
.ttl{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1}
h1{font-family:var(--font-d);font-size:20px;font-weight:700;margin:0;letter-spacing:.01em;line-height:1.3;text-wrap:balance}
.term{color:color-mix(in oklab,var(--brand-fg) 78%,transparent);font-size:14px}
.term b{color:var(--gold);font-weight:600}
.nowrap{white-space:nowrap}
.admin-link{margin-left:auto;font-size:13px;font-weight:600;color:var(--brand);background:var(--gold);text-decoration:none;border-radius:999px;padding:6px 14px;white-space:nowrap}
.admin-link.ghost{background:transparent;color:var(--brand-fg);border:1px solid color-mix(in oklab,var(--brand-fg) 55%,transparent)}
.admin-link+.admin-link{margin-left:0}
@media (max-width:600px){h1{font-size:17px}.logo{height:40px}.admin-link{padding:5px 10px}}

nav.tabs{display:flex;gap:4px;flex-wrap:wrap;padding-block:12px}
nav.tabs button{font:inherit;font-weight:500;border:1px solid var(--line);background:var(--surface);color:var(--fg);padding:7px 14px;border-radius:999px;cursor:pointer}
nav.tabs button[aria-selected="true"]{background:var(--accent);color:var(--accent-fg);border-color:var(--accent);box-shadow:inset 0 -3px 0 var(--gold)}
nav.tabs button:hover{border-color:var(--accent)}
button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

main{padding-bottom:40px;display:flex;flex-direction:column;gap:14px}
.box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.box h2{margin:0 0 6px;font-family:var(--font-d);font-size:20px;line-height:1.25}
.box h3{margin:0 0 8px;font-family:var(--font-d);font-size:17px}
.row{display:flex;flex-wrap:wrap;gap:12px 18px;align-items:flex-end}
.field{display:flex;flex-direction:column;gap:4px;min-width:200px}
.field.grow{flex:1}
label.lbl,.lbl{font-size:12px;color:var(--muted);letter-spacing:.04em;font-weight:500}
input[type=text],input[type=password],input[type=date],input[type=search],input[type=number],select{font:inherit;width:100%;padding:8px 10px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg)}
input[type=range]{width:100%;accent-color:var(--accent)}
.note{font-size:13px;color:var(--muted);max-width:80ch;margin:6px 0 0}
.status{margin:10px 0 0;font-weight:600;min-height:1.5em}
.status.error{color:var(--danger)}
.status.ok{color:var(--ok)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:600;padding:9px 18px;border-radius:999px;border:1px solid transparent;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn.primary{background:var(--accent);color:var(--accent-fg);box-shadow:inset 0 -3px 0 var(--gold)}
.btn.ghost{background:var(--surface);color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn.danger{background:transparent;color:var(--danger);border-color:color-mix(in oklab,var(--danger) 50%,transparent)}
.btn.small{padding:5px 12px;font-size:13px}
.btn:disabled{opacity:.5;cursor:default}
.pick{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:14px}
.pick img{width:88px;height:88px;object-fit:cover;border-radius:50%;border:3px solid var(--gold)}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px}
@media (max-width:600px){.grid{grid-template-columns:repeat(3,1fr);gap:4px}}
.tile{position:relative;padding:0;border:0;border-radius:6px;overflow:hidden;cursor:pointer;background:var(--sunk);aspect-ratio:1}
.tile img{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .25s;display:block}
.tile img.loaded{opacity:1}
.tile.err::after{content:'โหลดไม่ได้';position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:13px}
.cap{position:absolute;left:0;right:0;bottom:0;padding:4px 8px;font-size:12px;text-align:left;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.7));white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cap:empty{display:none}
.more-wrap{display:flex;justify-content:center;padding:14px 0}

.lb{position:fixed;inset:0;background:rgba(8,12,24,.94);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px;z-index:20}
.lb img{max-width:100%;max-height:calc(100vh - 120px);border-radius:6px;opacity:0;transition:opacity .2s}
.lb img.loaded{opacity:1}
.lb-bar{display:flex;align-items:center;gap:10px;margin-top:12px;color:#fff;flex-wrap:wrap;justify-content:center}
.lb-bar span{font-size:14px;opacity:.85;word-break:break-all}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);font-size:28px;line-height:1;background:rgba(255,255,255,.12);color:#fff;border:0;border-radius:999px;width:48px;height:48px;cursor:pointer}
.lb-nav.prev{left:12px}.lb-nav.next{right:12px}

table.tbl{border-collapse:collapse;width:100%}
.tbl th,.tbl td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl th{font-size:12px;color:var(--muted);font-weight:600}
.tbl td.num{font-variant-numeric:tabular-nums}
.tbl .actions{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.scroll{overflow-x:auto}
.bar{height:10px;background:var(--sunk);border-radius:999px;overflow:hidden;margin:10px 0}
.bar>div{height:100%;width:0;background:var(--accent);transition:width .2s}
.log{font-family:ui-monospace,monospace;font-size:12.5px;background:#0E1630;color:#D5DBE5;border-radius:6px;padding:10px;max-height:260px;overflow:auto;white-space:pre-wrap;margin:0}
.log:empty{display:none}
.empty{color:var(--muted);padding:30px 10px;text-align:center}
.loading{padding:40px 10px;text-align:center;color:var(--muted)}
.pill{display:inline-block;font-size:12px;border-radius:999px;padding:1px 8px;background:var(--sunk);color:var(--muted)}
.pill.ok{background:color-mix(in oklab,var(--ok) 14%,var(--surface));color:var(--ok)}
.pill.err{background:color-mix(in oklab,var(--danger) 12%,var(--surface));color:var(--danger)}

.drop{border:2px dashed var(--line);border-radius:var(--r);padding:26px 16px;text-align:center;background:var(--bg);cursor:pointer}
.drop.over{border-color:var(--accent);background:color-mix(in oklab,var(--accent) 8%,var(--bg))}
.drop b{font-family:var(--font-d);font-size:17px}
.qlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:6px;margin-top:12px}
.qitem{position:relative;border-radius:6px;overflow:hidden;background:var(--sunk);aspect-ratio:1}
.qitem img{width:100%;height:100%;object-fit:cover;display:block}
.qitem .st{position:absolute;left:4px;bottom:4px;font-size:11px;padding:1px 6px;border-radius:999px;background:rgba(0,0,0,.65);color:#fff}
.qitem.done .st{background:var(--ok)}
.qitem.err .st{background:var(--danger)}

footer.credit{margin-top:28px;padding:14px 0 18px;border-top:3px solid var(--gold);background:var(--brand);color:#C9D4F2;font-size:13px;text-align:center}
footer.credit b{color:var(--gold);font-weight:600}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* ---------- อัลบั้มตามปีการศึกษา ---------- */
.toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding-block:14px}
.years{display:flex;gap:6px;flex-wrap:wrap;flex:1;min-width:0}
.chip{font:inherit;font-size:14px;font-weight:500;border:1px solid var(--line);background:var(--surface);color:var(--fg);padding:6px 14px;border-radius:999px;cursor:pointer;font-variant-numeric:tabular-nums;white-space:nowrap}
.chip:hover{border-color:var(--accent)}
.chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-fg);box-shadow:inset 0 -3px 0 var(--gold)}
.find{position:relative;width:min(280px,100%)}
.find input{padding-left:32px}
.find svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted)}
.face-cta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:var(--r);padding:10px 14px}
.face-cta p{margin:0;flex:1;min-width:200px;color:var(--muted);font-size:14px}
.face-cta p b{color:var(--fg)}
.year-head{display:flex;align-items:baseline;justify-content:space-between;gap:8px;flex-wrap:wrap}
.year-head h2{font-family:var(--font-d);font-size:24px;margin:0;line-height:1.2}
.year-head span{color:var(--muted);font-size:14px;font-variant-numeric:tabular-nums}
.albums{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
@media (max-width:600px){.albums{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}}
.album{display:flex;flex-direction:column;text-align:left;padding:0;border:1px solid var(--line);background:var(--surface);border-radius:var(--r);overflow:hidden;cursor:pointer;color:inherit;font:inherit}
.album:hover{border-color:var(--accent);box-shadow:0 4px 14px rgba(22,51,127,.12)}
.album .cover{position:relative;aspect-ratio:4/3;background:var(--sunk);overflow:hidden}
.album .cover img{width:100%;height:100%;object-fit:cover;display:block;opacity:0;transition:opacity .25s}
.album .cover img.loaded{opacity:1}
.album .count{position:absolute;right:8px;bottom:8px;font-size:12px;font-weight:600;background:rgba(10,18,40,.72);color:#fff;border-radius:999px;padding:2px 9px;font-variant-numeric:tabular-nums}
.album .meta{padding:10px 12px 12px;display:flex;flex-direction:column;gap:2px}
.album .meta b{font-family:var(--font-d);font-size:16px;font-weight:600;line-height:1.3;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.album .meta span{font-size:13px;color:var(--muted)}
@media (max-width:600px){.album .meta b{font-size:14px}.album .meta{padding:8px 10px 10px}}
.crumb{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:14px}
.album-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:8px 20px}
.album-head h2{font-family:var(--font-d);font-size:26px;margin:0;line-height:1.25;text-wrap:balance}
.album-head .sub{color:var(--muted);font-size:14px}
.linkbtn{font:inherit;font-size:14px;background:none;border:0;color:var(--accent);cursor:pointer;padding:4px 0;font-weight:600}
.linkbtn:hover{text-decoration:underline}
a.album{text-decoration:none}
@media (max-width:600px){
  header.top .wrap{gap:10px}
  header.top .term{display:none}
  header.top h1{font-size:16px}
  .admin-link{font-size:12px;padding:4px 10px}
  header.top .wrap{flex-wrap:wrap}
  header.top .ttl{flex-basis:calc(100% - 60px)}
  .admin-link.ghost{margin-left:auto}
  .toolbar{flex-direction:column;align-items:stretch}
  .years{flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-inline:-16px;padding-inline:16px}
  .years::-webkit-scrollbar{display:none}
  .find{width:100%}
  .year-head h2{font-size:21px}
}
#albumsStatus:empty{display:none}
.share-row{display:flex;gap:8px;flex-wrap:wrap}
.btn.line{background:#06C755;color:#fff}
.btn.line:hover{filter:brightness(1.05)}
.card-share{position:absolute;top:8px;right:8px;font:inherit;font-size:11px;font-weight:700;letter-spacing:.02em;background:#06C755;color:#fff;border:0;border-radius:999px;padding:3px 9px;cursor:pointer;box-shadow:0 1px 4px rgba(0,0,0,.25)}
.card-share:hover{filter:brightness(1.08)}