/* ===================== Study Buddy — cheerful theme ===================== */
:root{
  --bg:#FBF8FF; --surface:#FFFFFF; --surface-2:#F3EEFF; --ink:#2B2147; --muted:#6E6690; --line:#E9E2F8;
  --accent:#6C4CF1; --accent-deep:#4F31D6; --accent-ink:#FFFFFF; --accent-soft:#EEE8FF;
  --sun:#FFC93C; --hl:#FFE27A; --hl-soft:#FFE27A; --hl-ink:#2B2147;
  --rec:#FF5A6E; --rec-deep:#E23B52; --ok:#14A37F; --sky:#4CC9F0; --pink:#FF8FD8; --mint:#2EC4A6; --orange:#FF9F43;
  --shadow:0 2px 4px rgba(76,49,180,.05),0 10px 28px rgba(76,49,180,.09);
  --shadow-lg:0 4px 10px rgba(76,49,180,.08),0 24px 60px rgba(76,49,180,.2);
  --r-sm:12px; --r:18px; --r-lg:26px;
  --font:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --display:"Outfit",var(--font);
  --mono:ui-monospace,"Cascadia Code",Consolas,monospace;
  --bounce:cubic-bezier(.3,1.3,.6,1);
  --nav-h:72px; --side-w:264px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#17112C; --surface:#231A42; --surface-2:#2D2353; --ink:#F5F1FF; --muted:#B6ACDD; --line:#3A2F68;
  --accent:#9C86FF; --accent-deep:#7B61F5; --accent-ink:#17112C; --accent-soft:#33296B;
  --hl:#FFD45C; --hl-soft:rgba(255,212,92,.38); --hl-ink:#17112C; --rec:#FF7287; --rec-deep:#E9506A; --ok:#3FE0B0;
  --shadow:0 2px 4px rgba(0,0,0,.25),0 10px 28px rgba(0,0,0,.3); --shadow-lg:0 24px 60px rgba(0,0,0,.5); color-scheme:dark;}}
:root[data-theme="dark"]{
  --bg:#17112C; --surface:#231A42; --surface-2:#2D2353; --ink:#F5F1FF; --muted:#B6ACDD; --line:#3A2F68;
  --accent:#9C86FF; --accent-deep:#7B61F5; --accent-ink:#17112C; --accent-soft:#33296B;
  --hl:#FFD45C; --hl-soft:rgba(255,212,92,.38); --hl-ink:#17112C; --rec:#FF7287; --rec-deep:#E9506A; --ok:#3FE0B0;
  --shadow:0 2px 4px rgba(0,0,0,.25),0 10px 28px rgba(0,0,0,.3); --shadow-lg:0 24px 60px rgba(0,0,0,.5); color-scheme:dark;}

*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:16.5px/1.62 var(--font);font-weight:500;-webkit-tap-highlight-color:transparent;-webkit-font-smoothing:antialiased;position:relative}
/* Soft colour blobs drifting slowly behind everything */
body::before{content:"";position:fixed;inset:-20%;z-index:-1;pointer-events:none;
  background:radial-gradient(28% 24% at 12% 18%,color-mix(in srgb,var(--pink) 14%,transparent),transparent 70%),
             radial-gradient(26% 22% at 88% 12%,color-mix(in srgb,var(--sky) 14%,transparent),transparent 70%),
             radial-gradient(30% 26% at 80% 88%,color-mix(in srgb,var(--sun) 14%,transparent),transparent 70%),
             radial-gradient(26% 24% at 15% 85%,color-mix(in srgb,var(--mint) 12%,transparent),transparent 70%);
  animation:drift 40s ease-in-out infinite alternate}
@keyframes drift{to{transform:translate(3%,-2%) rotate(4deg)}}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:var(--accent)}
b,strong{font-weight:800}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
[hidden]{display:none!important}
svg{flex:none}
.hl{background:linear-gradient(transparent 58%,var(--hl-soft) 58%,var(--hl-soft) 92%,transparent 92%);padding:0 .08em;border-radius:4px}

/* ===================== Animated compass logo ===================== */
.mark{display:inline-block;flex:none;overflow:visible;color:var(--ink)}
.mark .cp-star{transform-box:view-box;transform-origin:50% 50%;animation:settle 1.1s var(--bounce) both}
@keyframes settle{from{transform:rotate(-135deg) scale(.5);opacity:0}to{transform:none;opacity:1}}
.mark.float .cp-star{animation:settle 1.1s var(--bounce) both,sway 7s ease-in-out 1.2s infinite}
@keyframes sway{0%,100%{transform:rotate(0)}30%{transform:rotate(9deg)}65%{transform:rotate(-6deg)}}
.mark.thinking .cp-star{animation:spin 2.6s cubic-bezier(.5,0,.5,1) infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.mark.done .cp-star{animation:settle .8s var(--bounce) both}
.msg.model .mark,.welcome-top .mark,.processing .mark,.loading .mark,.empty .mark{color:var(--accent)}
a:hover > .mark .cp-star{animation:spin .9s var(--bounce)}

/* ===================== App shell ===================== */
.shell{display:flex;height:100%}
.sidebar{display:none}
.main-col{flex:1;min-width:0;display:flex;flex-direction:column;height:100%}
.topbar{display:flex;align-items:center;gap:6px;padding:calc(8px + env(safe-area-inset-top)) 12px 8px 14px;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:6;min-height:60px}
.topbar .title{font-family:var(--display);font-weight:600;font-size:1.25rem;margin-right:auto;display:flex;align-items:center;gap:10px;min-width:0}
.topbar .title .mark{width:32px;height:32px}
.topbar .title span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#topActions{display:flex;align-items:center}
.icon-btn{border:0;background:transparent;width:42px;height:42px;border-radius:14px;display:grid;place-items:center;color:var(--ink);position:relative;transition:background .15s,transform .2s var(--bounce)}
.icon-btn:hover{background:var(--surface-2)}
.icon-btn:active{transform:scale(.88)}
.icon-btn svg{width:22px;height:22px}
.avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--pink),var(--accent));color:#fff;font-family:var(--display);font-weight:600;font-size:1rem;display:grid;place-items:center;text-transform:uppercase}
.pill-btn{border:0;background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:7px 14px;font-size:.88rem;font-weight:800}
main{flex:1;overflow-y:auto;overscroll-behavior:contain;scroll-behavior:smooth}
.page{max-width:800px;margin:0 auto;padding:22px 16px calc(var(--nav-h) + 140px)}
.page.enter{animation:pop .35s var(--bounce)}
@keyframes pop{from{opacity:0;transform:translateY(12px) scale(.985)}to{opacity:1;transform:none}}

/* Bottom navigation with the record button in the middle */
.bottomnav{position:fixed;left:10px;right:10px;bottom:calc(10px + env(safe-area-inset-bottom));height:64px;padding:0 6px;background:var(--surface);border:1px solid var(--line);border-radius:24px;display:flex;align-items:stretch;z-index:7;box-shadow:var(--shadow-lg)}
:root{--nav-h:84px}
.bottomnav a,.bottomnav .rec-fab-wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-decoration:none;color:var(--muted);font-size:.72rem;font-weight:800;position:relative}
.bottomnav a svg{width:23px;height:23px;transition:transform .3s var(--bounce)}
.bottomnav a[aria-current="page"]{color:var(--accent)}
.bottomnav a[aria-current="page"] svg{transform:translateY(-2px) scale(1.15);stroke-width:2.4}
.bottomnav a[aria-current="page"]::after{content:"";position:absolute;bottom:7px;width:5px;height:5px;border-radius:50%;background:var(--accent);animation:pop .3s var(--bounce)}
.rec-fab{width:62px;height:62px;border-radius:50%;border:0;background:var(--rec);color:#fff;display:grid;place-items:center;margin-top:-30px;box-shadow:0 0 0 6px var(--bg),0 10px 24px rgba(255,90,110,.45);transition:transform .2s var(--bounce)}
.rec-fab:hover{transform:translateY(-2px) scale(1.04)}
.rec-fab:active{transform:scale(.94)}
.rec-fab svg{width:28px;height:28px}
.rec-fab.on{animation:pulse 1.4s infinite}

@media (min-width:960px){
  :root{--nav-h:0px}
  .bottomnav{display:none}
  .sidebar{display:flex;flex-direction:column;width:var(--side-w);flex:none;background:color-mix(in srgb,var(--surface) 88%,transparent);border-right:1px solid var(--line);padding:18px 14px;gap:4px;overflow-y:auto}
  .side-brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:600;font-size:1.35rem;padding:2px 8px 18px;text-decoration:none;color:inherit}
  .side-brand .mark{width:36px;height:36px}
  .side-rec{display:flex;align-items:center;justify-content:center;gap:10px;border:0;background:var(--rec);color:#fff;border-radius:18px;padding:13px;font-weight:800;font-size:1rem;margin-bottom:16px;box-shadow:0 10px 22px rgba(255,90,110,.32);transition:transform .2s var(--bounce)}
  .side-rec:hover{transform:translateY(-2px)}
  .side-rec:active{transform:scale(.97)}
  .side-rec svg{width:20px;height:20px}
  .side-rec.on{animation:pulse 1.4s infinite}
  .side-link{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:14px;text-decoration:none;color:var(--ink);font-weight:800;font-size:.97rem;transition:background .15s,transform .2s var(--bounce)}
  .side-link svg{width:21px;height:21px;color:var(--muted)}
  .side-link:hover{background:var(--surface-2);transform:translateX(3px)}
  .side-link[aria-current="page"]{background:var(--accent);color:var(--accent-ink);box-shadow:0 8px 18px color-mix(in srgb,var(--accent) 30%,transparent)}
  .side-link[aria-current="page"] svg{color:var(--accent-ink)}
  .side-head{font-size:.8rem;font-weight:800;color:var(--muted);padding:20px 12px 6px}
  .side-sub{display:flex;align-items:center;gap:10px;padding:7px 12px;border-radius:12px;text-decoration:none;color:var(--ink);font-size:.93rem;font-weight:700}
  .side-sub:hover{background:var(--surface-2)}
  
  .side-sub .n{margin-left:auto;color:var(--muted);font-size:.8rem}
  .side-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}
  .side-foot button.acct{flex:1;min-width:0;display:flex;align-items:center;gap:10px;border:0;background:transparent;padding:6px;border-radius:14px;text-align:left}
  .side-foot button.acct:hover{background:var(--surface-2)}
  .side-foot .who{min-width:0;font-size:.85rem;font-weight:700;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .topbar .title .mark,.topbar .mobile-only{display:none}
  .page{padding-top:30px}
}

/* ===================== Shared bits ===================== */
.page-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.page-head h1{font-family:var(--display);font-weight:600;font-size:clamp(1.8rem,5vw,2.3rem);line-height:1.08;margin:0;margin-right:auto}
.back{display:inline-flex;align-items:center;gap:4px;color:var(--muted);text-decoration:none;font-size:.92rem;font-weight:800;margin-bottom:10px;transition:transform .2s var(--bounce)}
.back:hover{transform:translateX(-3px)}
.back svg{width:18px;height:18px}
.hint{color:var(--muted);font-size:.93rem}
.section-title{font-family:var(--display);font-weight:600;font-size:1.2rem;margin:30px 0 12px}
.empty{background:var(--surface);border:2px dashed var(--line);border-radius:var(--r-lg);padding:26px 20px;text-align:center;color:var(--muted)}
.empty .mark{width:54px;height:54px;margin-bottom:8px}
.empty b{display:block;color:var(--ink);font-family:var(--display);font-weight:600;font-size:1.15rem;margin-bottom:4px}
.empty .row{justify-content:center;margin-top:14px}
.banner{display:flex;gap:12px;align-items:center;flex-wrap:wrap;background:color-mix(in srgb,var(--sun) 18%,var(--surface));border:2px solid var(--sun);border-radius:var(--r);padding:14px 16px;margin-bottom:18px}
.banner .t{flex:1;min-width:200px;font-size:.95rem}

.btn{border:1.5px solid var(--line);background:var(--surface);border-radius:999px;padding:9px 18px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;color:var(--ink);font-size:.95rem;transition:transform .2s var(--bounce),border-color .15s,box-shadow .15s}
.btn:hover{border-color:var(--accent);transform:translateY(-2px)}
.btn:active{transform:translateY(1px) scale(.97)}
.btn svg{width:18px;height:18px}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);box-shadow:0 6px 16px color-mix(in srgb,var(--accent) 35%,transparent)}
.btn.primary:hover{box-shadow:0 10px 22px color-mix(in srgb,var(--accent) 40%,transparent)}
.btn.danger{color:var(--rec)}
.btn.small{padding:6px 13px;font-size:.85rem}
.btn.block{width:100%;padding:13px}
.btn:disabled{opacity:.45;cursor:default;transform:none}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}

.badge{font-size:.76rem;font-weight:800;border-radius:999px;padding:3px 10px;background:var(--surface-2);color:var(--muted);white-space:nowrap}
.badge.ok{color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,var(--surface))}
.badge.bad{color:var(--rec);background:color-mix(in srgb,var(--rec) 12%,var(--surface))}
.spin{width:18px;height:18px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:r .8s linear infinite;flex:none}
@keyframes r{to{transform:rotate(360deg)}}
.dot-c{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--c,var(--muted));flex:none}
.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:14vh 0;color:var(--muted);font-weight:700}
.loading .mark{width:64px;height:64px}

/* ===================== Markdown body ===================== */
.body > :first-child{margin-top:0}
.body > :last-child{margin-bottom:0}
.body h3,.body h4{font-family:var(--display);font-weight:600;line-height:1.25;margin:1.3em 0 .45em}
.body h3{font-size:1.25rem;color:var(--accent)}
.body h4{font-size:1.08rem}
.body p{margin:.6em 0}
.body ul,.body ol{padding-left:1.4em;margin:.5em 0}
.body li{margin:.3em 0}
.body li::marker{color:var(--accent);font-weight:800}
.body mark,.snippet mark{background:linear-gradient(transparent 10%,var(--hl) 10%,var(--hl) 90%,transparent 90%);color:var(--hl-ink);padding:0 .2em;border-radius:5px;font-weight:800;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.body code{background:var(--surface-2);padding:.1em .4em;border-radius:7px;font-size:.88em;font-family:var(--mono)}
.body pre{background:#2B2147;color:#F5F1FF;padding:14px 16px;border-radius:var(--r);overflow-x:auto;font-size:.86rem;line-height:1.55}
.body pre code{background:none;padding:0;color:inherit}
.body table{border-collapse:collapse;margin:.8em 0;font-size:.92rem;display:block;overflow-x:auto}
.body th,.body td{border:1px solid var(--line);padding:6px 10px;text-align:left}
.body th{background:var(--surface-2)}
.caret{display:inline-block;width:9px;height:9px;background:var(--accent);border-radius:50%;margin-left:4px;animation:caret .7s ease-in-out infinite alternate;vertical-align:middle}
@keyframes caret{to{transform:scale(.4);opacity:.5}}

/* ===================== Chat ===================== */
.thread{display:flex;flex-direction:column;gap:22px}
.msg{max-width:100%;word-wrap:break-word}
.msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--pink) 45%,var(--accent)));color:#fff;padding:11px 17px;border-radius:22px 22px 6px 22px;max-width:85%;white-space:pre-wrap;font-weight:600;box-shadow:0 8px 20px color-mix(in srgb,var(--accent) 25%,transparent);animation:slideL .35s var(--bounce)}
.msg.model{align-self:stretch;display:flex;gap:10px;animation:slideR .35s var(--bounce)}
@keyframes slideL{from{opacity:0;transform:translateX(20px) scale(.95)}to{opacity:1;transform:none}}
@keyframes slideR{from{opacity:0;transform:translateX(-14px)}to{opacity:1;transform:none}}
.msg.model .mark{width:34px;height:34px;margin-top:2px}
.msg.model .content{flex:1;min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:8px 24px 24px 24px;padding:12px 16px;box-shadow:var(--shadow)}
.chips{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px}
.chips a{font-size:.82rem;font-weight:700;text-decoration:none;color:var(--muted);border:1.5px solid var(--line);border-radius:999px;padding:3px 11px;max-width:260px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;background:var(--bg);transition:transform .2s var(--bounce)}
.chips a:hover{color:var(--ink);border-color:var(--accent);transform:translateY(-2px)}
.chips a.note-ref{border-color:var(--sun);color:var(--ink);background:color-mix(in srgb,var(--sun) 14%,var(--surface))}
.tools{display:flex;gap:2px;margin-top:6px;margin-left:-8px}
.tools button{border:0;background:transparent;color:var(--muted);font-size:.82rem;padding:4px 9px;border-radius:9px;font-weight:800}
.tools button:hover{background:var(--surface-2);color:var(--ink)}
.err{color:var(--rec)}
.typing{display:flex;gap:6px;padding:4px 0;align-items:center;color:var(--muted);font-size:.93rem;font-weight:700}
.typing i{width:9px;height:9px;border-radius:50%;animation:b 1.1s var(--bounce) infinite}
.typing i:nth-child(1){background:var(--pink)}.typing i:nth-child(2){background:var(--sun);animation-delay:.15s}.typing i:nth-child(3){background:var(--sky);animation-delay:.3s}
.typing span{margin-left:6px}
@keyframes b{0%,80%,100%{transform:translateY(0)}40%{transform:translateY(-7px)}}

.welcome{padding:2vh 0 0}
.welcome-top{display:flex;align-items:flex-end;gap:14px;margin-bottom:6px}
.welcome-top .mark{width:52px;height:52px}
.welcome .hello{font-weight:800;color:var(--muted);font-size:1rem;margin:0}
.welcome h1{font-family:var(--display);font-weight:600;font-size:clamp(2.1rem,7vw,3.2rem);line-height:1.04;margin:4px 0 12px;max-width:14ch}
.welcome h1 .w{display:inline-block;opacity:0;animation:wordin .55s var(--bounce) forwards;animation-delay:calc(var(--i) * 70ms + 100ms)}
@keyframes wordin{from{opacity:0;transform:translateY(18px) rotate(-4deg)}to{opacity:1;transform:none}}
.welcome p{color:var(--muted);margin:0 0 24px;max-width:50ch}
.ideas{display:grid;gap:12px}
@media (min-width:700px){.ideas{grid-template-columns:repeat(3,1fr)}}
.ideas button{--tint:var(--pink);text-align:left;background:color-mix(in srgb,var(--tint) 16%,var(--surface));border-radius:var(--r-lg);padding:16px;display:flex;flex-direction:column;gap:8px;border:1px solid color-mix(in srgb,var(--tint) 30%,transparent);transition:transform .25s var(--bounce),box-shadow .25s;opacity:0;animation:pop .5s var(--bounce) forwards;animation-delay:calc(var(--i) * 90ms + 450ms)}
.ideas button:nth-child(2){--tint:var(--sky)}
.ideas button:nth-child(3){--tint:var(--sun)}
.ideas button:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.ideas button:active{transform:translateY(2px)}
.ideas .ico{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;background:var(--surface);color:color-mix(in srgb,var(--tint) 70%,var(--ink))}
.ideas .ico svg{width:20px;height:20px}
.ideas b{font-size:.98rem;line-height:1.35}
.ideas small{color:var(--muted);font-size:.8rem;font-weight:800}

.dock{position:fixed;left:0;right:0;bottom:calc(var(--nav-h) + env(safe-area-inset-bottom));padding:12px 12px 10px;background:linear-gradient(transparent,var(--bg) 35%);z-index:5}
@media (min-width:960px){.dock{left:var(--side-w);padding-bottom:18px}}
.pinned{max-width:800px;margin:0 auto 8px;display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:800;background:color-mix(in srgb,var(--sun) 25%,var(--surface));border:2px solid var(--sun);border-radius:999px;padding:4px 6px 4px 14px;width:fit-content;max-width:calc(100% - 8px);animation:pop .35s var(--bounce)}
.pinned span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pinned button{border:0;background:var(--surface);border-radius:50%;width:24px;height:24px;line-height:1;flex:none;font-weight:800}
.composer{max-width:800px;margin:0 auto;display:flex;align-items:flex-end;gap:2px;background:var(--surface);border:2px solid var(--line);border-radius:30px;padding:6px;box-shadow:var(--shadow-lg);transition:border-color .2s,box-shadow .2s}
.composer:focus-within{border-color:var(--accent);box-shadow:0 0 0 5px var(--accent-soft),var(--shadow-lg)}
.composer textarea{flex:1;border:0;background:transparent;resize:none;padding:10px 6px;max-height:180px;min-height:24px;line-height:1.45;outline:none;font-weight:600}
.round{width:44px;height:44px;border-radius:50%;border:0;display:grid;place-items:center;flex:none;background:transparent;color:var(--muted);transition:transform .25s var(--bounce),background .15s}
.round svg{width:22px;height:22px}
.round:hover{background:var(--surface-2);color:var(--ink)}
#attachBtn:hover svg{transform:rotate(90deg)}
.round svg{transition:transform .3s var(--bounce)}
.send{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 14px color-mix(in srgb,var(--accent) 35%,transparent)}
.send:hover{background:var(--accent);color:var(--accent-ink);transform:translateY(-2px) rotate(0)}
.send:not(:disabled):active{transform:translateY(2px);box-shadow:none}
.send:disabled{opacity:.3;cursor:default;box-shadow:none}
.send.stop{background:var(--ink);color:var(--bg);box-shadow:none}

/* ===================== Recorder ===================== */
#recDock{position:fixed;left:0;right:0;bottom:calc(var(--nav-h) + env(safe-area-inset-bottom));padding:12px;z-index:8}
@media (min-width:960px){#recDock{left:var(--side-w);padding-bottom:18px}}
.recorder{max-width:800px;margin:0 auto;background:var(--surface);border:2.5px solid var(--rec);border-radius:var(--r-lg);padding:14px 16px;box-shadow:var(--shadow-lg);animation:pop .4s var(--bounce)}
.rec-top{display:flex;align-items:center;gap:12px}
.dot{width:14px;height:14px;border-radius:50%;background:var(--rec);animation:pulse 1.4s infinite;flex:none}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(255,90,110,.55)}70%{box-shadow:0 0 0 14px rgba(255,90,110,0)}100%{box-shadow:0 0 0 0 rgba(255,90,110,0)}}
.timer{font-family:var(--display);font-weight:600;font-size:1.6rem;font-variant-numeric:tabular-nums}
.bars{flex:1;display:flex;align-items:center;gap:3px;height:32px;overflow:hidden;justify-content:flex-end}
.bars i{width:4px;border-radius:3px;flex:none;transition:height .1s}
.bars i:nth-child(4n+1){background:var(--rec)}.bars i:nth-child(4n+2){background:var(--orange)}.bars i:nth-child(4n+3){background:var(--sun)}.bars i:nth-child(4n){background:var(--pink)}
.rec-subject{font-size:.9rem;font-weight:700;margin:10px 0 2px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.rec-subject select{border:2px solid var(--line);border-radius:999px;padding:5px 12px;background:var(--bg);font-weight:800}
.rec-note{color:var(--muted);font-size:.82rem;margin:6px 0 12px}

/* ===================== Notes ===================== */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}
.subject-card{display:flex;flex-direction:column;text-decoration:none;color:inherit;background:color-mix(in srgb,var(--c,var(--muted)) 13%,var(--surface));border-radius:var(--r-lg);padding:16px;min-height:158px;border:1px solid color-mix(in srgb,var(--c,var(--muted)) 22%,transparent);transition:transform .25s var(--bounce),box-shadow .25s;position:relative;overflow:hidden;opacity:0;animation:pop .45s var(--bounce) forwards;animation-delay:calc(var(--i,0) * 60ms)}
.subject-card::after{content:"";position:absolute;right:-26px;top:-26px;width:90px;height:90px;border-radius:50%;background:color-mix(in srgb,var(--c,var(--muted)) 20%,transparent)}
.subject-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.subject-card .swatch{width:44px;height:44px;border-radius:14px;background:var(--c,var(--muted));color:#fff;display:grid;place-items:center;font-family:var(--display);font-weight:600;font-size:1.2rem;margin-bottom:12px;position:relative;z-index:1;transition:transform .3s var(--bounce)}
.subject-card:hover .swatch{transform:scale(1.08)}
.subject-card b{font-size:1.02rem;line-height:1.3}
.subject-card small{color:var(--muted);font-size:.82rem;display:block;font-weight:700}
.subject-card .foot{margin-top:auto;padding-top:12px;display:flex;align-items:baseline;gap:6px}
.subject-card .count{font-family:var(--display);font-weight:600;font-size:1.7rem;line-height:1;color:var(--c,var(--ink))}
.note-list{display:flex;flex-direction:column;gap:10px}
.note-row{display:flex;gap:12px;align-items:center;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;box-shadow:var(--shadow);transition:transform .25s var(--bounce),border-color .15s;opacity:0;animation:pop .4s var(--bounce) forwards;animation-delay:calc(var(--i,0) * 50ms)}
.note-row:hover{border-color:var(--accent);transform:translateX(4px)}
.note-row .ico{width:44px;height:44px;border-radius:14px;background:color-mix(in srgb,var(--c,var(--accent)) 16%,var(--surface));display:grid;place-items:center;flex:none;color:var(--c,var(--accent))}
.note-row .ico svg{width:21px;height:21px}
.note-row .t{flex:1;min-width:0}
.note-row b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.note-row small{color:var(--muted);font-size:.83rem;font-weight:700}
.note-meta{display:flex;gap:8px;flex-wrap:wrap;align-items:center;color:var(--muted);font-size:.9rem;font-weight:700;margin:-6px 0 18px}
.note-meta select{border:2px solid var(--line);border-radius:999px;padding:5px 12px;background:var(--surface);font-weight:800}
.shared-tag{color:var(--ok);font-weight:800;font-size:.85rem}
.seg{display:flex;gap:4px;background:var(--surface-2);border-radius:999px;padding:5px;margin-bottom:20px;overflow-x:auto}
.seg button{flex:1;border:0;background:transparent;border-radius:999px;padding:9px 12px;font-weight:800;font-size:.9rem;color:var(--muted);white-space:nowrap;transition:background .2s,color .2s,transform .25s var(--bounce)}
.seg button:hover{color:var(--ink)}
.seg button[aria-selected="true"]{background:var(--surface);color:var(--accent);box-shadow:var(--shadow);transform:scale(1.03)}
.note-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px 20px;box-shadow:var(--shadow)}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}
.editor{width:100%;min-height:55vh;border:2px solid var(--line);border-radius:var(--r);padding:16px;background:var(--surface);font-family:var(--mono);font-size:.9rem;line-height:1.6;resize:vertical}
.editor:focus{border-color:var(--accent);outline:none}
.title-input{font-family:var(--display);font-weight:600;font-size:1.6rem;border:2px solid var(--line);border-radius:14px;padding:6px 12px;width:100%;background:var(--surface);margin-bottom:12px}
.transcript-text{white-space:pre-wrap;font-size:.95rem}
.thumbs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.thumbs img{width:88px;height:88px;object-fit:cover;border-radius:14px;border:2px solid var(--surface);box-shadow:var(--shadow);transition:transform .25s var(--bounce)}
.thumbs img:hover{transform:scale(1.06)}
.processing{background:var(--surface);border-radius:var(--r-lg);padding:28px 22px;text-align:center;box-shadow:var(--shadow)}
.processing .mark{width:64px;height:64px;margin-bottom:10px}
.processing > b{display:block;font-family:var(--display);font-weight:600;font-size:1.35rem}
.steps{list-style:none;text-align:left;max-width:320px;margin:16px auto 0;padding:0;display:grid;gap:8px}
.steps li{display:flex;gap:10px;align-items:center;font-weight:700;color:var(--muted);opacity:.45;animation:stepOn .4s var(--bounce) forwards;animation-delay:calc(var(--i) * 2.4s)}
.steps li::before{content:"";width:22px;height:22px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:r .9s linear infinite;flex:none}
@keyframes stepOn{to{opacity:1;color:var(--ink)}}

/* Flashcards */
.flash{perspective:1200px;margin:6px 0 16px}
.card{position:relative;min-height:260px;border-radius:var(--r-lg);cursor:pointer;transform-style:preserve-3d;transition:transform .6s var(--bounce)}
.card.flipped{transform:rotateY(180deg)}
.card:not(.flipped):hover{transform:translateY(-3px)}
.card .face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--r-lg);padding:30px;display:flex;flex-direction:column;justify-content:center;font-family:var(--display);font-weight:500;font-size:1.25rem;line-height:1.45;text-align:center}
.card .face:first-child{background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--pink) 40%,var(--accent)));color:#fff;box-shadow:var(--shadow-lg)}
.card .back-face{transform:rotateY(180deg);background:var(--surface);color:var(--ink);border:2px solid var(--accent);box-shadow:var(--shadow-lg)}

.card .face small{position:absolute;top:16px;left:20px;font-family:var(--font);font-size:.8rem;font-weight:800;opacity:.75}
.flash-nav{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.progress{height:10px;border-radius:999px;background:var(--surface-2);overflow:hidden;margin-bottom:14px}
.progress div{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--pink),var(--accent));transition:width .5s var(--bounce)}

/* Quiz */
.q{font-family:var(--display);font-size:1.35rem;font-weight:500;margin:4px 0 16px;line-height:1.35}
.options{display:grid;gap:10px}
.options button{text-align:left;border:2px solid var(--line);background:var(--surface);border-radius:var(--r);padding:13px 14px;display:flex;gap:12px;align-items:center;font-weight:600;transition:transform .2s var(--bounce),border-color .15s}
.options button:hover:not(:disabled){border-color:var(--accent);transform:translateY(-2px)}
.options button:disabled{cursor:default}
.options .letter{font-weight:800;color:var(--accent);flex:none;width:30px;height:30px;border-radius:10px;background:var(--accent-soft);display:grid;place-items:center;font-size:.9rem}
.options button.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,var(--surface));animation:yay .5s var(--bounce)}
.options button.right .letter{background:var(--ok);color:#fff}
.options button.wrong{border-color:var(--rec);background:color-mix(in srgb,var(--rec) 12%,var(--surface));animation:shake .4s}
.options button.wrong .letter{background:var(--rec);color:#fff}
@keyframes yay{50%{transform:scale(1.04)}}
@keyframes shake{20%,60%{transform:translateX(-6px)}40%,80%{transform:translateX(6px)}}
.explain{margin-top:14px;padding:13px 15px;border-radius:var(--r);background:var(--surface-2);font-size:.95rem;animation:pop .35s var(--bounce)}
.score{font-family:var(--display);font-weight:600;font-size:4rem;line-height:1;margin:6px 0 6px;color:var(--accent);animation:pop .6s var(--bounce)}
.history{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:14px}

/* Search */
.search-box{display:flex;gap:8px;align-items:center;background:var(--surface);border:2px solid var(--line);border-radius:999px;padding:6px 6px 6px 18px;margin-bottom:18px;box-shadow:var(--shadow);transition:border-color .2s,box-shadow .2s}
.search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}
.search-box svg{width:20px;height:20px;color:var(--accent)}
.search-box input{flex:1;border:0;background:transparent;outline:none;padding:7px 0;min-width:0;font-weight:600}
.result{display:block;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:13px 16px;margin-bottom:10px;box-shadow:var(--shadow);transition:transform .25s var(--bounce),border-color .15s;animation:pop .35s var(--bounce)}
.result:hover{border-color:var(--accent);transform:translateX(4px)}
.result small{color:var(--muted);font-size:.83rem;font-weight:700;display:inline-flex;align-items:center;gap:6px}
.snippet{font-size:.92rem;color:var(--muted);margin-top:6px}
.snippet mark{font-weight:700}

/* Timetable */
.days{display:flex;gap:6px;overflow-x:auto;margin-bottom:14px;padding:2px 2px 6px}
.days button{border:2px solid var(--line);background:var(--surface);border-radius:999px;padding:7px 15px;font-weight:800;font-size:.9rem;flex:none;transition:transform .2s var(--bounce)}
.days button:hover{transform:translateY(-2px)}
.days button[aria-selected="true"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.slot{display:flex;align-items:center;gap:12px;background:color-mix(in srgb,var(--c,var(--line)) 12%,var(--surface));border-radius:var(--r);padding:10px 8px 10px 14px;margin-bottom:8px;border-left:6px solid var(--c,var(--line));animation:pop .35s var(--bounce)}
.slot .time{font-variant-numeric:tabular-nums;font-weight:800;font-size:.88rem;min-width:118px;color:var(--muted)}
.slot .name{flex:1;min-width:0;font-weight:800}
.slot.now{box-shadow:0 0 0 2.5px var(--sun)}
.form-row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;background:var(--surface);border:2px dashed var(--line);border-radius:var(--r);padding:14px}
.form-row label{display:flex;flex-direction:column;font-size:.8rem;font-weight:800;gap:5px;color:var(--muted);flex:1;min-width:120px}
.form-row input,.form-row select{border:2px solid var(--line);border-radius:12px;padding:9px 11px;background:var(--bg);color:var(--ink);font-weight:600;font-size:.95rem}
.form-row input:focus,.form-row select:focus{border-color:var(--accent);outline:none}
.subj-row{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line)}

.subj-row .name{flex:1;min-width:0}
.subj-row small{color:var(--muted);font-weight:700}
.now-card{display:flex;align-items:center;gap:14px;flex-wrap:wrap;background:linear-gradient(120deg,var(--accent),color-mix(in srgb,var(--pink) 80%,var(--accent)));color:#fff;border-radius:var(--r-lg);padding:16px 18px;margin-bottom:22px;box-shadow:0 14px 30px color-mix(in srgb,var(--accent) 30%,transparent);animation:pop .45s var(--bounce)}
.now-card .live{width:12px;height:12px;border-radius:50%;background:#fff;animation:pulse 1.6s infinite;flex:none}
.now-card .t{flex:1;min-width:180px}
.now-card small{opacity:.85;font-weight:700}
.now-card .btn{background:#fff;border-color:#fff;color:var(--rec-deep)}

/* ===================== Sign-in and share pages ===================== */
.auth{min-height:100%;display:grid;place-items:center;padding:24px 18px calc(24px + env(safe-area-inset-bottom))}
.auth-card{width:100%;max-width:450px}
.auth-brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:600;font-size:1.3rem;margin-bottom:24px}
.auth-brand .mark{width:38px;height:38px}
.auth-hero{display:flex;align-items:flex-end;gap:10px}

.auth h1{font-family:var(--display);font-weight:600;font-size:clamp(2.3rem,9vw,3.2rem);line-height:1.02;margin:0 0 14px}
.auth h1 .w{display:inline-block;opacity:0;animation:wordin .55s var(--bounce) forwards;animation-delay:calc(var(--i) * 80ms + 100ms)}
.auth .lead{color:var(--muted);margin:0 0 22px;font-weight:600}
.feature-list{list-style:none;padding:0;margin:0 0 26px;display:grid;gap:10px}
.feature-list li{display:flex;gap:12px;align-items:center;font-size:.97rem;font-weight:700;opacity:0;animation:pop .5s var(--bounce) forwards;animation-delay:calc(var(--i) * 100ms + 500ms)}
.feature-list .ico{width:40px;height:40px;border-radius:14px;display:grid;place-items:center;flex:none;background:color-mix(in srgb,var(--tint) 18%,var(--surface));color:color-mix(in srgb,var(--tint) 75%,var(--ink))}
.feature-list .ico svg{width:20px;height:20px}
.auth-form{background:var(--surface);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow-lg);opacity:0;animation:pop .5s var(--bounce) forwards;animation-delay:.8s}
.auth-form label{display:block;font-weight:800;font-size:.9rem;margin-bottom:6px}
.auth-form input{width:100%;padding:12px 14px;border:2px solid var(--line);border-radius:14px;background:var(--bg);margin-bottom:12px;font-weight:600}
.auth-form input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 4px var(--accent-soft)}
.auth-form .or{text-align:center;color:var(--muted);font-size:.85rem;font-weight:700;margin:12px 0}
.auth-note{color:var(--muted);font-size:.85rem;font-weight:600;margin-top:14px;text-align:center}
.share-page .page{padding-bottom:60px}
.share-cta{margin-top:30px;background:color-mix(in srgb,var(--sun) 20%,var(--surface));border:2px solid var(--sun);border-radius:var(--r-lg);padding:18px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.share-cta .mark{width:44px;height:44px}
.share-cta .t{flex:1;min-width:180px}

/* ===================== Dialogs (bottom sheets on phones) ===================== */
dialog{border:0;padding:0;background:var(--surface);color:var(--ink);box-shadow:var(--shadow-lg);max-width:500px;width:calc(100% - 32px);border-radius:var(--r-lg)}
dialog[open]{animation:pop .35s var(--bounce)}
dialog::backdrop{background:rgba(43,33,71,.45);backdrop-filter:blur(3px)}
@media (max-width:640px){
  dialog{margin:auto 0 0;width:100%;max-width:100%;border-radius:28px 28px 0 0;max-height:88vh;padding-bottom:env(safe-area-inset-bottom)}
  dialog[open]{animation:sheet .4s var(--bounce)}
  @keyframes sheet{from{transform:translateY(60px);opacity:.3}to{transform:none;opacity:1}}
  dialog .dlg::before{content:"";display:block;width:44px;height:5px;border-radius:3px;background:var(--line);margin:-8px auto 14px}
}
.dlg{padding:22px;overflow-y:auto;max-height:inherit}
.dlg h2{font-family:var(--display);font-weight:600;margin:0 0 6px;font-size:1.5rem}
.dlg > p{color:var(--muted);margin:0 0 16px;font-size:.95rem;font-weight:600}
.field{display:block;margin-bottom:16px}
.field > span{display:block;font-weight:800;font-size:.9rem;margin-bottom:6px}
.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:2px solid var(--line);border-radius:14px;background:var(--bg);font-weight:600}
.field textarea{min-height:180px;resize:vertical}
.field small{display:block;color:var(--muted);font-size:.8rem;font-weight:600;margin-top:6px}
.dlg .row.end{justify-content:flex-end;margin-top:8px}
.menu{display:grid;gap:10px;margin-bottom:12px;grid-template-columns:1fr 1fr}
.menu button{--tint:var(--accent);display:flex;flex-direction:column;gap:6px;align-items:flex-start;text-align:left;background:color-mix(in srgb,var(--tint) 12%,var(--surface));border-radius:var(--r);padding:14px;border:1px solid color-mix(in srgb,var(--tint) 25%,transparent);transition:transform .25s var(--bounce),box-shadow .25s}
.menu button:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.menu button:active{transform:translateY(2px)}
.menu .ico{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;background:var(--surface);color:color-mix(in srgb,var(--tint) 75%,var(--ink))}
.menu .ico svg{width:19px;height:19px}
.menu b{display:block;font-size:.95rem}
.menu small{color:var(--muted);font-size:.78rem;line-height:1.3;display:block;font-weight:700}
.menu button.rec{--tint:var(--rec)}
.menu button:nth-child(2){--tint:var(--sky)}
.menu button:nth-child(3){--tint:var(--pink)}
.menu button:nth-child(4){--tint:var(--orange)}
.menu button:nth-child(5){--tint:var(--mint)}
.menu button:nth-child(6){--tint:var(--sun)}
.chat-list{display:flex;flex-direction:column;gap:4px;margin:6px 0 14px;max-height:55vh;overflow-y:auto}
.chat-item{display:flex;align-items:center;gap:6px;border-radius:14px;transition:background .15s}
.chat-item:hover{background:var(--surface-2)}
.chat-item button.open{flex:1;min-width:0;text-align:left;border:0;background:transparent;padding:10px 12px}
.chat-item b{display:block;font-size:.95rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-item small{color:var(--muted);font-size:.8rem;font-weight:700}
.chat-item.current{background:var(--accent-soft)}
.usage{height:12px;border-radius:999px;background:var(--surface-2);overflow:hidden;margin:6px 0 4px}
.usage div{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--mint),var(--accent));transition:width .6s var(--bounce)}
.acct-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.acct-head .avatar{width:50px;height:50px;font-size:1.3rem}
.acct-head b{display:block}
.acct-head small{color:var(--muted);font-weight:700}

.toast{position:fixed;left:50%;top:calc(74px + env(safe-area-inset-top));transform:translate(-50%,-20px) scale(.9);background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:999px;font-size:.92rem;font-weight:800;opacity:0;pointer-events:none;transition:opacity .2s,transform .35s var(--bounce);z-index:30;max-width:90vw;text-align:center;box-shadow:var(--shadow-lg)}
.toast.show{opacity:1;transform:translate(-50%,0) scale(1)}

/* Confetti */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:40;overflow:hidden}
.confetti i{position:absolute;top:-12px;width:9px;height:14px;border-radius:2px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-delay:0s!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .confetti{display:none}
}

/* Timetable import */
.import-card{background:var(--surface);border:2px solid var(--accent);border-radius:var(--r-lg);padding:18px;margin-bottom:22px;box-shadow:var(--shadow);display:grid;grid-template-columns:minmax(0,1fr);gap:12px;animation:pop .35s var(--bounce)}
.import-card > b{font-family:var(--display);font-weight:600;font-size:1.2rem}
.import-card .hint{margin:-6px 0 0}
.import-subjects{display:flex;flex-wrap:wrap;gap:6px}
.import-subjects .badge{white-space:normal}
.import-days{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(200px,100%),1fr));gap:10px;max-height:340px;overflow-y:auto}
.import-days > div{background:var(--surface-2);border-radius:var(--r);padding:10px 12px;font-size:.88rem;min-width:0}
.import-days > div > b{display:block;margin-bottom:4px}
.import-slot{display:flex;gap:8px;padding:3px 0;font-weight:600}
.import-slot span{color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap}
.import-replace{display:flex;gap:8px;align-items:center;font-size:.9rem;font-weight:700}
.import-replace input{width:18px;height:18px;accent-color:var(--accent)}