/* QR attendance (attendance.php). Loaded after pdf-tools.css so the hero, option cards, fields,
   status line and FAQ grid are shared. Adds: the instructor home (create form + saved sessions),
   the live dashboard (projector card with QR/PIN + roll table) including a full-screen
   projector mode, and the mobile-first student check-in card. */
.at-hero:before{content:"SCAN"}
.at-app{padding-top:56px;background:linear-gradient(180deg,#f6f8fb 0%,#fff 260px)}
.at-app [hidden],.at-student [hidden]{display:none!important}
.at-help{margin:0;font-size:.84rem;color:#4e5e72;line-height:1.6}
.ct-mini-btn{background:#fff;border:1px solid var(--line)!important;color:var(--navy);border-radius:999px;padding:9px 16px;font-size:.84rem;gap:8px;white-space:nowrap;display:inline-flex;align-items:center}
.ct-mini-btn .icon{width:16px;height:16px}
.ct-mini-btn:disabled{opacity:.45;cursor:not-allowed}
.ct-mini-btn.button-primary{background:var(--navy);color:#fff;border-color:var(--navy)!important}
.at-icon-btn{width:36px;height:36px;padding:0;border-radius:8px;background:#fff;border:1px solid var(--line);color:var(--navy);display:inline-grid;place-items:center;flex:none;cursor:pointer}
.at-icon-btn .icon{width:18px;height:18px}
.at-icon-btn:hover{border-color:var(--blue);color:var(--blue)}
.at-pin-input{font-family:Manrope,monospace!important;letter-spacing:.18em;text-transform:uppercase;font-weight:700}
.ct-bt-count{font:700 .74rem Manrope,sans-serif;color:#687482;letter-spacing:.04em}

/* ---------- instructor home ---------- */
.at-home{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:28px;align-items:start}
.at-home-main{display:flex;flex-direction:column;gap:22px;min-width:0}
.at-home-side{display:flex;flex-direction:column;gap:18px}
.at-create{padding:26px}
.at-grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.at-check{display:flex;gap:12px;align-items:flex-start;background:#f6f8fb;border:1px solid var(--line);border-radius:8px;padding:12px 14px;cursor:pointer}
.at-check input{margin-top:4px;accent-color:var(--magenta);flex:none}
.at-check span{display:flex;flex-direction:column;gap:2px;font-size:.88rem}
.at-check small{color:#687482;font-size:.78rem;line-height:1.5}
.at-c-submit{align-self:flex-start;border-radius:8px;padding:13px 24px;gap:10px;font-size:.95rem}
.at-c-submit .icon{width:20px;height:20px}
.at-c-submit:disabled{opacity:.6;cursor:wait}
.at-saved-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.at-saved-list li{display:flex;align-items:center;gap:10px}
.at-saved-list a{flex:1;display:grid;grid-template-columns:1fr auto;grid-template-rows:auto auto;column-gap:14px;align-items:center;background:#f6f8fb;border:1px solid var(--line);border-radius:8px;padding:10px 14px;color:var(--navy);text-decoration:none;transition:.2s var(--ease)}
.at-saved-list a:hover{border-color:var(--blue);background:#fff;transform:translateX(2px)}
.at-saved-list a b{font-size:.92rem}
.at-saved-list a small{font-size:.76rem;color:#687482;grid-column:1}
.at-saved-list a code{grid-row:1/3;font:700 .95rem Manrope,monospace;letter-spacing:.14em;color:var(--magenta)}
.at-resume{display:flex;flex-direction:column;gap:8px}
.at-resume input{border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:.9rem;width:100%}
.at-resume input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,176,.15)}
.at-steps ol{margin:0;padding:0;list-style:none;counter-reset:step;display:flex;flex-direction:column;gap:14px}
.at-steps li{position:relative;padding-left:40px;display:flex;flex-direction:column;gap:2px;font-size:.86rem;line-height:1.55}
.at-steps li:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:28px;height:28px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font:800 .8rem Manrope,sans-serif}
.at-steps li span{color:#4e5e72;font-size:.82rem}

/* ---------- dashboard ---------- */
.at-dash-top{background:linear-gradient(115deg,#081a30 0%,#0b2545 58%,var(--brand-pink-deep) 100%);color:#fff;padding:22px 0 0}
.at-dash-topbar{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.at-dash-topbar .breadcrumb{display:flex;gap:10px;font-size:.82rem;color:#9fb4c9;padding-bottom:22px}
.at-dash-topbar .breadcrumb a:hover{color:#fff}
.at-app[data-mode="host"]{padding-top:32px}
.at-dash-missing{max-width:560px;margin:0 auto}
.at-locked{max-width:560px;margin:0 auto}
.at-locked-form{display:flex;gap:8px}
.at-locked-form input{flex:1;border:1px solid var(--line);border-radius:8px;padding:10px 12px;font:600 .9rem Manrope,monospace;letter-spacing:.06em}
.at-dash-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}
.at-qr-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;display:flex;flex-direction:column;gap:18px;box-shadow:0 1px 2px rgba(7,20,42,.07),0 20px 50px rgba(11,37,69,.08)}
.at-qr-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start}
.at-qr-head h1{font-size:1.45rem;letter-spacing:-.02em;margin:4px 0 2px;line-height:1.2}
.at-qr-meta{margin:0;color:#687482;font-size:.84rem}
.at-qr-status{display:inline-block;font:800 .68rem Manrope,sans-serif;letter-spacing:.14em;padding:4px 10px;border-radius:999px;background:#e6f7ee;color:#137a45}
.at-qr-status[data-state="closed"]{background:#fde8e8;color:#b32626}
.at-qr-stage{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:22px;align-items:center}
.at-qr-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;aspect-ratio:1}
.at-qr-box canvas{width:100%;height:100%;display:block;image-rendering:pixelated;border-radius:8px}
.at-qr-side{display:flex;flex-direction:column;gap:14px}
.at-big-code{display:flex;flex-direction:column;gap:2px}
.at-big-code small{font:700 .68rem Manrope,sans-serif;letter-spacing:.14em;color:#687482;text-transform:uppercase}
.at-big-code small i{font-style:normal;color:var(--magenta)}
.at-big-code b{font:800 clamp(1.8rem,3.4vw,2.6rem)/1 Manrope,monospace;letter-spacing:.16em;color:var(--navy)}
.at-pin b{color:var(--magenta)}
.at-pin-bar{display:block;height:4px;border-radius:2px;background:#eef2f6;overflow:hidden;margin-top:6px;max-width:220px}
.at-pin-bar i{display:block;height:100%;background:var(--magenta);transition:width 1s linear}
.at-big-count{display:flex;align-items:baseline;gap:10px}
.at-big-count b{font:800 3rem/1 Manrope,sans-serif;letter-spacing:-.05em;color:var(--navy)}
.at-big-count small{font-size:.9rem;color:#4e5e72;font-weight:600}
.at-countdown{display:inline-flex;align-items:center;gap:8px;font-size:.86rem;font-weight:600;color:#4e5e72;background:#f6f8fb;border-radius:999px;padding:7px 12px;align-self:flex-start}
.at-countdown .icon{width:16px;height:16px;color:var(--blue)}
.at-qr-url{margin:0;font-size:.82rem;color:#687482}
.at-qr-url b{font-family:Manrope,monospace;color:var(--navy);word-break:break-all}
.at-qr-actions{display:flex;gap:8px;flex-wrap:wrap}
.at-qr-hint{margin:-6px 0 0;font-size:.8rem;color:#687482}
/* projector mode */
.at-qr-card:fullscreen,.at-qr-card.is-fake-full{position:fixed;inset:0;z-index:9999;border-radius:0;border:0;padding:4vmin 5vmin;justify-content:center;background:#fff}
.at-qr-card:fullscreen .at-qr-stage,.at-qr-card.is-fake-full .at-qr-stage{grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:5vmin;align-items:center;flex:1}
.at-qr-card:fullscreen .at-qr-box,.at-qr-card.is-fake-full .at-qr-box{max-height:82vh;max-width:82vh;margin:0 auto;width:100%}
.at-qr-card:fullscreen .at-qr-head h1,.at-qr-card.is-fake-full .at-qr-head h1{font-size:3vmin}
.at-qr-card:fullscreen .at-qr-meta,.at-qr-card.is-fake-full .at-qr-meta{font-size:2vmin}
.at-qr-card:fullscreen .at-big-code b,.at-qr-card.is-fake-full .at-big-code b{font-size:9vmin}
.at-qr-card:fullscreen .at-big-code small,.at-qr-card.is-fake-full .at-big-code small{font-size:2vmin}
.at-qr-card:fullscreen .at-pin-bar,.at-qr-card.is-fake-full .at-pin-bar{max-width:100%;height:8px}
.at-qr-card:fullscreen .at-big-count b,.at-qr-card.is-fake-full .at-big-count b{font-size:12vmin}
.at-qr-card:fullscreen .at-big-count small,.at-qr-card.is-fake-full .at-big-count small{font-size:2.6vmin}
.at-qr-card:fullscreen .at-countdown,.at-qr-card.is-fake-full .at-countdown{font-size:2.4vmin}
.at-qr-card:fullscreen .at-qr-url,.at-qr-card.is-fake-full .at-qr-url{font-size:2.4vmin}
.at-qr-card:fullscreen .at-qr-actions,.at-qr-card:fullscreen .at-qr-hint,.at-qr-card.is-fake-full .at-qr-actions,.at-qr-card.is-fake-full .at-qr-hint{display:none}
/* roll list */
.at-list-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;display:flex;flex-direction:column;gap:16px;min-width:0}
.at-list-head{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.at-stats{display:flex;gap:8px;flex-wrap:wrap}
.at-stat{display:flex;flex-direction:column;align-items:center;min-width:64px;padding:8px 10px;border-radius:8px;background:#f6f8fb;border:1px solid var(--line)}
.at-stat b{font:800 1.3rem/1 Manrope,sans-serif;letter-spacing:-.04em;color:var(--navy)}
.at-stat small{font-size:.7rem;color:#687482;font-weight:600;margin-top:3px}
.at-stat.is-present b{color:#137a45}
.at-stat.is-late b{color:#b56a00}
.at-stat.is-absent b{color:#b32626}
.at-stat.is-excused b{color:#4e5e72}
.at-stat.is-flag{background:#fff6e5;border-color:#f4d9a3}
.at-stat.is-flag b{color:#b56a00}
.at-live{display:inline-flex;align-items:center;gap:8px;font:700 .7rem Manrope,sans-serif;letter-spacing:.12em;color:#137a45;text-transform:uppercase}
.at-live i{width:8px;height:8px;border-radius:50%;background:#1fb25e;box-shadow:0 0 0 0 rgba(31,178,94,.5);animation:at-pulse 2s infinite}
.at-live.is-busy i{background:var(--blue)}
@keyframes at-pulse{0%{box-shadow:0 0 0 0 rgba(31,178,94,.5)}70%{box-shadow:0 0 0 8px rgba(31,178,94,0)}100%{box-shadow:0 0 0 0 rgba(31,178,94,0)}}
.at-list-tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.at-list-tools input[type=search]{flex:1;min-width:160px;border:1px solid var(--line);border-radius:999px;padding:9px 14px;font-size:.86rem}
.at-list-tools input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,176,.15)}
.at-table-wrap{max-height:520px;overflow:auto;border:1px solid var(--line);border-radius:14px}
.at-table{width:100%;border-collapse:collapse;font-size:.86rem}
.at-table th{position:sticky;top:0;background:#f6f8fb;text-align:left;font:700 .72rem Manrope,sans-serif;letter-spacing:.06em;color:#687482;padding:10px 12px;border-bottom:1px solid var(--line);z-index:1}
.at-table td{padding:9px 12px;border-bottom:1px solid #eef2f6;vertical-align:top}
.at-table tr:last-child td{border-bottom:0}
.at-table tr.is-late td{background:#fffaf0}
.at-table tr.is-excused td{background:#f4f6fa;color:#687482}
.at-table .at-id{font-family:Manrope,monospace;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.at-table .at-time{font-variant-numeric:tabular-nums;white-space:nowrap;color:#4e5e72}
.at-row-del{width:30px;height:30px;border-radius:4px;opacity:.5}
.at-row-del:hover{opacity:1;color:#b32626;border-color:#b32626}
.at-status-pill{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;background:#e6f7ee;color:#137a45;white-space:nowrap}
.at-status-pill.is-late{background:#fff3dc;color:#b56a00}
.at-status-pill.is-excused{background:#eef2f6;color:#4e5e72}
.at-flags{display:flex;gap:6px;flex-wrap:wrap;margin-top:4px}
.at-flag{font-size:.68rem;font-weight:600;padding:2px 7px;border-radius:4px;background:#eef2f6;color:#4e5e72}
.at-flag.is-warn{background:#fff3dc;color:#b56a00}
.at-empty{display:flex;flex-direction:column;align-items:center;gap:10px;padding:44px 20px;text-align:center;color:#687482;font-size:.88rem;margin:0}
.at-empty .icon{width:36px;height:36px;color:#c3cdd8}
.at-panel{border:1px solid var(--line);border-radius:14px;padding:0 16px;background:#fbfcfd}
.at-panel summary{display:flex;align-items:center;gap:10px;padding:12px 0;cursor:pointer;font-weight:700;font-size:.88rem;color:var(--navy);list-style:none}
.at-panel summary::-webkit-details-marker{display:none}
.at-panel summary .icon{width:18px;height:18px;color:var(--blue);flex:none}
.at-panel summary small{font-weight:500;color:#687482;font-size:.76rem;margin-left:auto;text-align:right}
.at-panel[open]{padding-bottom:14px}
.at-manual-form{display:grid;grid-template-columns:1.1fr 1.5fr auto auto;gap:8px}
.at-manual-form input,.at-manual-form select,.at-panel textarea{border:1px solid var(--line);border-radius:8px;padding:9px 12px;font-size:.86rem;background:#fff;width:100%}
.at-manual-form input:focus,.at-manual-form select:focus,.at-panel textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,176,.15)}
.at-panel textarea{font-family:inherit;resize:vertical}
.at-roster-tools{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:8px}
.at-absent{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:4px;font-size:.84rem;max-height:220px;overflow:auto}
.at-absent li{display:flex;gap:8px;align-items:center}
.at-absent code{font:700 .8rem Manrope,monospace;color:var(--navy)}
.at-absent-head{font:700 .7rem Manrope,sans-serif;letter-spacing:.1em;color:#b32626;text-transform:uppercase;margin-bottom:2px}
.at-absent-head.is-ok{color:#137a45}
.at-link{background:none;border:0;color:var(--blue);font-size:.78rem;cursor:pointer;padding:0;margin-left:auto;text-decoration:underline}
.at-key-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.at-key-row code{flex:1;min-width:200px;font:700 .86rem Manrope,monospace;letter-spacing:.06em;background:#fff;border:1px solid var(--line);border-radius:8px;padding:9px 12px;color:var(--navy);word-break:break-all}
.at-key-panel .at-help{margin-top:8px}

/* ---------- student ---------- */
.at-student{min-height:70vh;background:linear-gradient(160deg,#0b2545 0%,#173d6b 55%,var(--brand-pink-deep) 130%);padding:28px 0 60px}
.at-student-wrap{max-width:520px}
.at-student-card{background:#fff;border-radius:20px;padding:26px 24px 22px;display:flex;flex-direction:column;gap:18px;box-shadow:0 1px 2px rgba(7,20,42,.07),0 30px 70px rgba(4,15,32,.35)}
.at-student-brand{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:800;font-size:.95rem}
.at-student-brand .icon{width:26px;height:26px;color:var(--magenta)}
.at-student-brand small{margin-left:auto;font-weight:500;color:#687482;font-size:.74rem;text-align:right}
.at-student-head h1{font-size:1.35rem;line-height:1.25;letter-spacing:-.02em;margin:8px 0 4px}
.at-student-meta{margin:0;color:#4e5e72;font-size:.86rem}
.at-student-time{display:flex;align-items:center;gap:8px;margin:10px 0 0;font-size:.82rem;color:#4e5e72;background:#f6f8fb;border-radius:8px;padding:8px 12px}
.at-student-time .icon{width:16px;height:16px;color:var(--blue);flex:none}
.at-student-status{display:inline-block;font:800 .66rem Manrope,sans-serif;letter-spacing:.14em;padding:4px 10px;border-radius:999px;background:#e6f7ee;color:#137a45;text-transform:uppercase}
.at-student-status[data-state="closed"]{background:#fde8e8;color:#b32626}
.at-student-form{display:flex;flex-direction:column;gap:14px}
.at-student-form input[type=text]{font-size:1.05rem;padding:12px 14px}
.at-remember{display:flex;gap:10px;align-items:flex-start;font-size:.8rem;color:#4e5e72;cursor:pointer}
.at-remember input{margin-top:3px;accent-color:var(--magenta)}
.at-s-submit{width:100%;border-radius:14px;padding:15px 20px;font-size:1.05rem;gap:10px;justify-content:center}
.at-s-submit .icon{width:20px;height:20px}
.at-s-submit:disabled{opacity:.55;cursor:not-allowed}
.at-student-state{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;padding:22px 10px}
.at-student-state .icon{width:56px;height:56px;padding:12px;border-radius:50%;background:#e6f7ee;color:#137a45}
.at-student-state.is-error .icon{background:#fde8e8;color:#b32626}
.at-student-state.is-late .icon{background:#fff3dc;color:#b56a00}
.at-student-state h1,.at-student-state h2{margin:4px 0 0;font-size:1.4rem;letter-spacing:-.02em}
.at-student-state p{margin:0;color:#4e5e72;font-size:.95rem}
.at-student-ticket{font:700 .9rem Manrope,sans-serif!important;color:var(--navy)!important;background:#f6f8fb;border-radius:8px;padding:8px 14px}
.at-student-state small{color:#687482;font-size:.76rem}
.at-student-privacy{display:flex;gap:8px;align-items:flex-start;margin:0;font-size:.72rem;color:#687482;line-height:1.5;border-top:1px solid var(--line);padding-top:14px}
.at-student-privacy .icon{width:14px;height:14px;flex:none;margin-top:2px}

/* ---------- responsive ---------- */
@media (max-width:1080px){.at-dash-grid{grid-template-columns:1fr}.at-home{grid-template-columns:1fr}}
@media (max-width:720px){
  .at-grid-3{grid-template-columns:1fr}
  .at-qr-stage{grid-template-columns:1fr}
  .at-qr-card,.at-list-card{padding:18px;border-radius:14px}
  .at-manual-form{grid-template-columns:1fr 1fr}
  .at-manual-form button{grid-column:1/3}
  .at-locked-form{flex-direction:column}
  .at-student{padding:16px 0 40px}
  .at-student-card{padding:22px 18px 18px;border-radius:14px}
  .at-panel summary small{display:none}
}
@media print{.at-qr-card{box-shadow:none}}