:root{--bg:#f4f6f9;--card:#fff;--text:#14213d;--muted:#5b6478;--line:#e2e6ee;--brand:#1d3557;--brand-ink:#fff;--accent:#2a6fdb;--ok:#1b7f4b;--ok-bg:#e3f5ea;--warn:#8a5a00;--warn-bg:#fff3d6;--error:#b3261e;--error-bg:#fde8e6;--mark:#fff08a;--radius:14px;--tap:52px;}
@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--card:#182033;--text:#eef1f7;--muted:#a3acbf;--line:#2a3348;--brand:#2a4f87;--accent:#6ea3ff;--ok:#6fd49a;--ok-bg:#163826;--warn:#ffd27a;--warn-bg:#3a2d0c;--error:#ff8d85;--error-bg:#4a1a17;--mark:#6b5a00;}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:18px/1.45 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif;padding-bottom:calc(72px + env(safe-area-inset-bottom))}
a{color:var(--accent)}
h1{font-size:28px;margin:8px 0 6px;line-height:1.2}
h2{font-size:19px;margin:0 0 10px;letter-spacing:.2px}
h3{font-size:16px;margin:14px 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.6px}
p{margin:6px 0}
code{font-size:15px;background:var(--line);padding:1px 5px;border-radius:5px}
.muted{color:var(--muted)}.small{font-size:15px}.late{color:var(--error);font-weight:700}.error-text{color:var(--error)}
.topbar .chip{font-size:12.5px;padding:4px 10px}
.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 16px;padding-top:calc(10px + env(safe-area-inset-top));background:var(--brand);color:var(--brand-ink)}
.brand{color:var(--brand-ink);text-decoration:none;font-weight:700;font-size:18px;white-space:nowrap}
.chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.chip{display:inline-block;padding:5px 11px;border-radius:999px;background:var(--card);color:var(--text);text-decoration:none;font-size:13.5px;border:1px solid var(--line);white-space:nowrap;cursor:pointer;font-family:inherit}
.chip-ok{background:var(--ok-bg);color:var(--ok);border-color:transparent}.chip-warn{background:var(--warn-bg);color:var(--warn);border-color:transparent}.chip-error{background:var(--error-bg);color:var(--error);border-color:transparent}
.chip-active{background:var(--brand);color:#fff;border-color:transparent}
.chips-row{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 14px}
.shell{display:block}
.main{padding:12px 16px 24px;max-width:860px;margin:0 auto}
.nav{position:fixed;left:0;right:0;bottom:0;z-index:6;display:flex;justify-content:space-around;background:var(--card);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
.nav a{flex:1;text-align:center;text-decoration:none;color:var(--muted);font-size:14px;font-weight:600;padding:8px 2px;border-radius:10px;min-height:44px;display:flex;align-items:center;justify-content:center;gap:4px}
.nav a.active{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}
.nav a.wide-only{display:none}
.badge{display:inline-block;background:var(--error);color:#fff;border-radius:999px;font-size:12px;padding:1px 7px;line-height:1.4}
.banner{display:block;padding:12px 16px;margin:0 0 10px;border-radius:10px;font-size:16px;text-decoration:none;color:inherit}
.banner.info{background:var(--ok-bg);color:var(--ok)}.banner.ok{background:var(--ok-bg);color:var(--ok)}.banner.warn{background:var(--warn-bg);color:var(--warn)}.banner.error{background:var(--error-bg);color:var(--error)}
.alerts .banner{margin-bottom:6px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:0 0 14px}
.card.overdue,.next-card.overdue{border-color:var(--error)}
.greet{margin-top:4px}
.list{list-style:none;margin:0;padding:0}
.list.compact .item{padding:8px 0}
.item{display:grid;grid-template-columns:1fr auto;grid-template-areas:"main when" "actions actions";gap:4px 10px;padding:12px 0;border-top:1px solid var(--line);align-items:center}
.item:first-child{border-top:0}
.item.overdue .what{color:var(--error)}
.item-main{grid-area:main;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:2px;min-width:0}
.who{font-weight:700;font-size:16px}.what{font-size:17px}
.when{grid-area:when;text-align:right;font-size:15px;color:var(--muted);white-space:nowrap}
.item-actions{grid-area:actions;display:flex;gap:8px;justify-content:flex-end}
ol.list{counter-reset:n}ol.list .item{counter-increment:n}ol.list .item .who::before{content:counter(n) ". ";color:var(--muted)}
.empty{color:var(--muted);font-style:italic}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:var(--tap);padding:10px 18px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--text);font:inherit;font-weight:600;font-size:17px;text-decoration:none;cursor:pointer;-webkit-tap-highlight-color:transparent}
.btn:active{transform:scale(.98)}.btn[disabled]{opacity:.5}
.btn-primary{background:var(--accent);color:#fff;border-color:transparent}
.btn-danger{color:var(--error);border-color:var(--error)}
.btn-block{width:100%;margin-top:10px}
.btn-small{min-height:40px;padding:6px 12px;font-size:15px;border-radius:10px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0 16px}
.actions .btn{flex:1 1 44%}
.row-between{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}
.tag{display:inline-block;font-size:12.5px;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--line);color:var(--muted);text-transform:uppercase;letter-spacing:.4px;vertical-align:middle}
.tag-ok{background:var(--ok-bg);color:var(--ok)}.tag-warn{background:var(--warn-bg);color:var(--warn)}.tag-error{background:var(--error-bg);color:var(--error)}
.tag-deadline{background:var(--error-bg);color:var(--error)}.tag-commitment{background:#e6ecff;color:#2b47a1}.tag-task{background:var(--line)}.tag-ai{background:#efe6ff;color:#5b2ea6}
@media (prefers-color-scheme:dark){.tag-commitment{background:#1f2a52;color:#9fb4ff}.tag-ai{background:#2c1f4f;color:#c7b0ff}}
.next-title{font-size:24px;font-weight:700;margin:4px 0;line-height:1.25}
.next-meta{font-size:16px}
.details summary{cursor:pointer;color:var(--accent);font-weight:600;padding:8px 0;min-height:40px;display:flex;align-items:center}
.inline-form,.form{display:flex;flex-direction:column;gap:10px;margin:8px 0}
label{display:flex;flex-direction:column;gap:4px;font-size:15px;color:var(--muted);font-weight:600}
input,select,textarea{font:inherit;font-size:17px;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px;min-height:var(--tap);width:100%}
textarea{min-height:120px;line-height:1.4}
input[type=file]{padding:10px}
.grid2{display:grid;grid-template-columns:1fr;gap:10px}
.searchbar{display:flex;gap:8px;margin:6px 0 10px}
.cards{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.student-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;text-decoration:none;color:inherit}
.student-card.has-overdue{border-left:5px solid var(--error)}
.sc-head{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap}.sc-name{font-size:20px;font-weight:700}.sc-meta{color:var(--muted);font-size:15px}
.sc-next{margin:6px 0 4px;font-size:16px}.sc-next .label{font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);font-weight:700;margin-right:6px}
.sc-foot{display:flex;gap:10px;align-items:center;font-size:14px}
.fact{display:grid;grid-template-columns:1fr;gap:2px;padding:10px 0;border-top:1px solid var(--line)}
.fact:first-of-type{border-top:0}
.fact-key{font-size:13px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);font-weight:700}
.fact-value{font-size:18px}
.fact-actions{display:flex;gap:6px;margin-top:4px}
.correct-form{display:flex;gap:6px;margin-top:6px}.correct-form input{flex:1}
.conflict{padding:8px 0;border-top:1px solid var(--line)}.conflict .label{font-weight:700;text-transform:uppercase;font-size:13px;letter-spacing:.5px;color:var(--muted)}
.ask-form{display:flex;gap:8px;margin:6px 0}
.ask-form input{flex:1;min-width:0}
.ask-result{margin-top:10px;padding:12px 14px;border-radius:12px;background:var(--bg);border:1px solid var(--line)}
.ask-result .answer{white-space:pre-wrap;font-size:18px}
.ask-result .cites{margin:8px 0 0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.ask-result .cites a{font-size:14px;padding:4px 10px;border-radius:999px;background:var(--card);border:1px solid var(--line);text-decoration:none}
.ask-result .conflict-note{color:var(--warn);font-weight:600;margin-top:8px}
.timeline{list-style:none;padding:0;margin:0}.timeline li{padding:8px 0;border-top:1px solid var(--line)}.timeline li:first-child{border-top:0}
.timeline.big li{padding:12px 0}.tl-head{margin-bottom:2px}
.detail-box{margin-top:6px;padding:10px 12px;background:var(--bg);border-radius:10px;font-size:15px}
.raw{white-space:pre-wrap;word-wrap:break-word;font:15px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--bg);padding:12px;border-radius:10px;max-height:70vh;overflow:auto}
mark{background:var(--mark);color:inherit;padding:1px 0;border-radius:3px}
.plain{padding-left:18px}.plain li{margin:4px 0}
.toast{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom));transform:translateX(-50%);background:var(--text);color:var(--bg);padding:12px 18px;border-radius:12px;font-size:16px;z-index:50;max-width:90vw;box-shadow:0 6px 24px rgba(0,0,0,.25)}
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px}
.login-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;width:100%;max-width:420px}
.login-card form{display:flex;flex-direction:column;gap:12px}
.status-processing h2::after{content:"";display:inline-block;width:14px;height:14px;margin-left:10px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}
.google-box{padding:10px 12px;border:1px dashed var(--line);border-radius:10px;margin-bottom:10px}
@media (min-width:900px){
  body{padding-bottom:24px}
  .shell{display:grid;grid-template-columns:220px 1fr;min-height:calc(100vh - 56px)}
  .nav{position:sticky;top:56px;align-self:start;flex-direction:column;justify-content:flex-start;border-top:0;border-right:1px solid var(--line);height:calc(100vh - 56px);padding:14px 10px;gap:4px}
  .nav a{flex:0 0 auto;justify-content:flex-start;padding:10px 14px;font-size:16px}
  .nav a.wide-only{display:flex}
  .main{padding:20px 32px 40px}
  .grid2{grid-template-columns:1fr 1fr}
  .actions .btn{flex:0 1 auto}
  .fact{grid-template-columns:200px 1fr auto auto;align-items:center;gap:10px}
  .fact-actions{margin-top:0}
  .correct-form{grid-column:1 / -1}
  .cards{grid-template-columns:1fr 1fr}
  .item{grid-template-columns:1fr auto auto;grid-template-areas:"main when actions"}
  .toast{bottom:28px}
}
/* guided tour */
.tour-overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:40}
.tour-target{position:relative;z-index:41;box-shadow:0 0 0 4px var(--accent),0 0 0 9999px rgba(0,0,0,.55);border-radius:12px;background:var(--card)}
.tour-card{position:fixed;left:12px;right:12px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:42;background:var(--card);color:var(--text);border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:0 10px 40px rgba(0,0,0,.4);max-width:520px;margin:0 auto}
.tour-card h3{margin:4px 0 6px;font-size:19px;color:var(--text);text-transform:none;letter-spacing:0}
.tour-card p{margin:0 0 10px;font-size:16px;line-height:1.4}
.tour-count{font-size:12px;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);font-weight:700}
.tour-row{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap}
.tour-pill{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(84px + env(safe-area-inset-bottom));z-index:39;background:var(--accent);color:#fff;border:0;border-radius:999px;padding:10px 16px;font:inherit;font-weight:700;font-size:15px;box-shadow:0 6px 20px rgba(0,0,0,.3)}
@media (min-width:900px){.tour-card{bottom:24px}.tour-card-anchored{position:absolute;bottom:auto;right:auto;width:380px;left:auto}.tour-pill{bottom:24px}}