/* ===================== SEE Prep — styles ===================== */
:root{
  --bg:#eef2f6; --card:#ffffff; --ink:#0f172a; --muted:#64748b; --faint:#94a3b8;
  --line:#e2e8f0; --line2:#eef2f7;
  --brand:#0f766e; --brand-d:#115e59; --brand-l:#ccfbf1; --brand-bg:#f0fdfa;
  --good:#16a34a; --good-l:#dcfce7; --bad:#dc2626; --bad-l:#fee2e2; --warn:#d97706; --warn-l:#fef3c7;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 4px 12px rgba(15,23,42,.05);
  --shadow-lg:0 10px 30px rgba(15,23,42,.12);
  --r:16px; --r-sm:11px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.5; -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important}
.muted{color:var(--muted)} .faint{color:var(--faint)}
code{background:#0f172a0d;padding:1px 5px;border-radius:5px;font-size:.85em}
a{color:var(--brand-d)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;
  border:none;background:var(--brand);color:#fff;font-weight:700;font-size:15px;
  padding:13px 16px;border-radius:12px;cursor:pointer;transition:background .12s,transform .05s}
.btn:hover{background:var(--brand-d)} .btn:active{transform:translateY(1px)}
.btn[disabled]{opacity:.45;cursor:default}
.btn.ghost{background:#fff;color:var(--brand-d);border:1.5px solid var(--brand)}
.btn.ghost:hover{background:var(--brand-bg)}
.btn.secondary{background:#475569}.btn.secondary:hover{background:#334155}
.btn.sm{width:auto;font-size:13px;padding:8px 13px}

/* ---------- login ---------- */
.login{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.login-card{background:var(--card);border-radius:20px;box-shadow:var(--shadow-lg);
  padding:34px 28px;max-width:380px;width:100%;text-align:center}
.login-card h1{margin:14px 0 4px;font-size:22px}
.login-card form{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.login-card input{border:1.5px solid var(--line);border-radius:12px;padding:13px 14px;font-size:15px;width:100%}
.login-card input:focus{outline:none;border-color:var(--brand)}
.login-msg{font-size:13.5px;margin-top:14px;min-height:18px}
.login-msg.ok{color:var(--good)} .login-msg.err{color:var(--bad)}
.login-foot{font-size:12px;color:var(--faint);margin-top:18px;line-height:1.5;border-top:1px solid var(--line);padding-top:14px}
.brand-badge{display:inline-grid;place-items:center;width:60px;height:60px;border-radius:16px;
  background:linear-gradient(150deg,var(--brand),var(--brand-d));color:#fff;font-weight:800;font-size:20px;letter-spacing:.5px;margin:0 auto}
.brand-badge.sm{width:30px;height:30px;border-radius:9px;font-size:12px}

/* ---------- app bar ---------- */
.appbar{position:sticky;top:0;z-index:30;background:var(--card);border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(15,23,42,.03)}
.appbar-inner{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;
  padding:calc(env(safe-area-inset-top) + 12px) 18px 10px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:16px}
.appbar-right{display:flex;align-items:center;gap:14px}
.countdown{text-align:right;line-height:1.05}
.countdown b{font-size:20px;color:var(--brand-d);display:block} .countdown span{font-size:10.5px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.account{width:34px;height:34px;border-radius:50%;border:1.5px solid var(--line);background:#fff;color:var(--muted);
  font-weight:800;cursor:pointer;font-size:18px;line-height:1}
.account:hover{border-color:var(--brand);color:var(--brand)}
.account-menu{position:fixed;top:60px;right:14px;z-index:40;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--shadow-lg);padding:12px;min-width:200px}
.account-row{font-size:13px;color:var(--muted);padding:2px 4px 10px;word-break:break-all}

/* tabs */
.tabs{max-width:960px;margin:0 auto;display:flex;gap:4px;padding:0 12px 8px;overflow-x:auto;-webkit-overflow-scrolling:touch}
.tabs::-webkit-scrollbar{display:none}
.tabs button{flex:0 0 auto;border:none;background:transparent;color:var(--muted);font-weight:600;font-size:13.5px;
  padding:8px 13px;border-radius:9px;cursor:pointer;white-space:nowrap}
.tabs button:hover{background:var(--line2);color:var(--ink)}
.tabs button.active{background:var(--brand);color:#fff}

.demo-banner{max-width:960px;margin:12px auto 0;padding:10px 14px;background:var(--warn-l);color:#92400e;
  font-size:12.5px;border-radius:10px}
.demo-banner code{background:#0000000f}

/* ---------- layout ---------- */
.view{max-width:960px;margin:0 auto;padding:18px 16px 80px}
.grid{display:grid;gap:14px}
@media(min-width:720px){ .grid.cols-2{grid-template-columns:1fr 1fr} .grid.cols-3{grid-template-columns:repeat(3,1fr)} }
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:18px}
.card h2{margin:0 0 3px;font-size:16px}
.card h3{margin:0 0 10px;font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;font-weight:700}
.section-title{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;font-weight:700;margin:22px 4px 10px}
.lead{color:var(--muted);font-size:14px;margin:0 0 14px}
.tag{display:inline-block;font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;background:var(--brand-l);color:var(--brand-d)}
.tag.gray{background:var(--line2);color:var(--muted)}
.pill-row{display:flex;gap:10px;flex-wrap:wrap}
.kpi{flex:1;min-width:90px;background:var(--brand-bg);border-radius:12px;padding:12px;text-align:center}
.kpi b{display:block;font-size:24px;color:var(--brand-d)} .kpi span{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}

/* dashboard session row */
.session{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line2)}
.session:last-child{border-bottom:none}
.session .dot{flex:0 0 auto;width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-weight:800;font-size:12px;background:var(--brand-l);color:var(--brand-d)}
.session .body{flex:1;min-width:0}
.session .body .top{display:flex;justify-content:space-between;gap:8px;align-items:baseline}
.session .body .day{font-weight:700;font-size:14px}
.session .body .focus{font-size:13.5px;color:#334155;margin-top:2px}
.session .body .refs{font-size:12px;color:var(--faint);margin-top:5px}
.check{flex:0 0 auto;width:24px;height:24px;border-radius:7px;border:2px solid var(--line);background:#fff;cursor:pointer;display:grid;place-items:center}
.check.done{background:var(--good);border-color:var(--good);color:#fff}

/* quiz */
.progress{height:7px;background:var(--line);border-radius:99px;overflow:hidden;margin:4px 0 16px}
.progress>i{display:block;height:100%;background:var(--brand);width:0;transition:width .25s}
.qmeta{font-size:12px;color:var(--muted);margin-bottom:4px}
.qstem{font-size:16.5px;font-weight:600;margin:8px 0 14px}
.opt{display:block;width:100%;text-align:left;background:#f8fafc;border:1.5px solid var(--line);border-radius:12px;
  padding:13px 14px;margin-bottom:9px;font-size:14.5px;cursor:pointer;color:var(--ink);transition:background .12s,border-color .12s}
.opt:hover{background:#f1f5f9}
.opt.correct{background:var(--good-l);border-color:var(--good);color:#14532d;font-weight:600}
.opt.wrong{background:var(--bad-l);border-color:var(--bad);color:#7f1d1d;font-weight:600}
.opt.dim{opacity:.5}
.opt:disabled{cursor:default}
.rationale{background:var(--brand-bg);border-left:4px solid var(--brand);border-radius:8px;padding:12px 14px;margin-top:8px;font-size:13.5px;color:#334155;display:none}
.rationale.show{display:block}
.rationale b{color:var(--brand-d)}
.result-num{font-size:46px;font-weight:800;text-align:center;color:var(--brand-d)}
.result-lbl{text-align:center;color:var(--muted);margin-bottom:10px}

/* bars / stats */
.statrow{margin-bottom:14px}
.statrow .lbl{display:flex;justify-content:space-between;font-size:13px;margin-bottom:5px}
.bar{height:10px;background:var(--line);border-radius:99px;overflow:hidden}
.bar>i{display:block;height:100%;border-radius:99px}
.weaklist{list-style:none;padding:0;margin:6px 0 0}
.weaklist li{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line2);font-size:13.5px}
.weaklist li:last-child{border-bottom:none}

/* schedule */
.wk{margin-bottom:10px}
.wk summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;
  padding:13px 16px;background:var(--card);border-radius:12px;box-shadow:var(--shadow);font-weight:700;font-size:14px}
.wk summary::-webkit-details-marker{display:none}
.wk[data-current="1"] summary{outline:2px solid var(--brand)}
.wk .wk-body{padding:6px 4px 4px}
.wk-pct{font-size:12px;color:var(--muted);font-weight:600}

/* inputs */
.field{display:flex;align-items:center;gap:8px;margin-top:8px;font-size:13px;color:var(--muted)}
.field input,.field select,textarea{border:1.5px solid var(--line);border-radius:9px;padding:8px 10px;font-size:14px;font-family:inherit}
.field input{width:84px}
.field input:focus,textarea:focus,select:focus{outline:none;border-color:var(--brand)}
textarea{width:100%;min-height:90px;resize:vertical;margin-top:6px}
.note-item{margin-bottom:14px}
.note-item .nt{font-weight:600;font-size:14px}
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#0f172a;color:#fff;
  padding:10px 16px;border-radius:10px;font-size:13.5px;z-index:60;box-shadow:var(--shadow-lg);opacity:0;transition:opacity .2s}
.toast.show{opacity:1}
.spinner{margin:60px auto;width:30px;height:30px;border:3px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===================== v2 components ===================== */
.card-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:2px}
.pdf-link{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;border:1.5px solid var(--line);background:#fff;text-decoration:none;font-size:16px}
.pdf-link:hover{border-color:var(--brand)}

/* streak */
.streak-card{background:linear-gradient(160deg,#ffffff,#fff8ef);border:1px solid #fde9c9}
.streak-top{display:flex;align-items:center;gap:14px}
.flame{line-height:1;filter:drop-shadow(0 2px 6px rgba(217,119,6,.35));animation:flamepulse 2.2s ease-in-out infinite}
@keyframes flamepulse{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-2px) scale(1.06)}}
.streak-n{font-size:30px;font-weight:800;color:var(--ink);line-height:1}
.streak-n span{display:block;font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-top:2px}
.streak-title{font-size:13.5px;color:var(--warn);font-weight:600;margin-top:4px}
.streak-next{margin-top:14px;font-size:12px;color:var(--muted)}
.bar.slim{height:7px;margin-bottom:5px}

.mini-sess{display:flex;justify-content:space-between;gap:10px;font-size:13.5px;padding:6px 0;border-bottom:1px solid var(--line2)}
.mini-sess:last-child{border-bottom:none}
.mini-sess .faint{max-width:52%;text-align:right;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.theme-banner{background:linear-gradient(150deg,var(--brand),var(--brand-d));color:#fff;border-radius:16px;padding:16px 18px;margin-bottom:14px;box-shadow:var(--shadow)}
.theme-banner .faint{color:rgba(255,255,255,.82);font-size:11.5px;text-transform:uppercase;letter-spacing:.6px;font-weight:600}
.theme-banner h2{margin:3px 0 0;font-size:19px;color:#fff}

.sess-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;margin-bottom:12px;box-shadow:var(--shadow)}
.sess-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.day-badge{display:inline-block;background:var(--brand-l);color:var(--brand-d);font-weight:700;font-size:12px;padding:4px 10px;border-radius:999px}
.sess-focus{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:10px;line-height:1.45}
.sess-fields{display:flex;flex-direction:column;gap:7px}
.sf{font-size:12.5px;color:#334155;line-height:1.42}
.sf .fl{display:inline-block;min-width:64px;color:var(--muted);font-weight:700;font-size:10.5px;text-transform:uppercase;letter-spacing:.4px;margin-right:6px;vertical-align:top}
.sf.prodigy{background:var(--brand-bg);border-radius:8px;padding:8px 10px;border-left:3px solid var(--brand)}
.sf.prodigy .fl{color:var(--brand-d)}
.tip{background:#f8fafc;font-size:12.5px;color:var(--muted);margin-top:6px;padding:12px 14px}

/* confetti */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:80;overflow:hidden}
.confetti i{position:absolute;top:-14px;width:9px;height:14px;border-radius:2px;opacity:.92;animation:fall 2.3s linear forwards}
@keyframes fall{to{transform:translateY(106vh) rotate(560deg);opacity:.6}}

/* ===================== v3: easy done buttons + week completion ===================== */
.theme-banner{display:flex;align-items:center;justify-content:space-between;gap:12px}
.theme-banner.complete{background:linear-gradient(150deg,var(--good),#15803d)}
.wk-progress{text-align:right;color:#fff;line-height:1}
.wk-progress b{font-size:22px;display:block}
.wk-progress span{font-size:10.5px;opacity:.85;text-transform:uppercase;letter-spacing:.5px}

/* the big, easy "done" control */
.donebtn{display:block;width:100%;margin-top:16px;border:2px solid var(--brand);background:var(--brand-bg);color:var(--brand-d);
  font-weight:700;font-size:15.5px;padding:16px;border-radius:13px;cursor:pointer;transition:background .12s,transform .05s}
.donebtn:hover{background:var(--brand-l)} .donebtn:active{transform:scale(.99)}
.donebtn.done{background:var(--good);border-color:var(--good);color:#fff}

/* roomier session cards (scrolling is fine; clarity first) */
.sess-card{padding:18px 16px;margin-bottom:16px}
.sess-card.is-done{border-color:var(--good);background:linear-gradient(0deg,#f0fdf4,#ffffff)}
.done-tag{background:var(--good-l);color:#14532d;font-weight:700;font-size:11px;padding:4px 10px;border-radius:999px}
.sess-focus{font-size:15px;margin-bottom:12px;line-height:1.5}
.sess-fields{gap:9px}
.sf{font-size:13px;line-height:1.5}
.sf .fl{min-width:120px}
.day-badge{font-size:13px;padding:5px 12px}

.complete-banner{display:none;background:var(--good-l);color:#14532d;border:1px solid #86efac;border-radius:12px;
  padding:12px 14px;font-weight:700;font-size:14px;text-align:center;margin-bottom:14px}
.complete-banner.show{display:block;animation:pop .3s ease}
@keyframes pop{0%{transform:scale(.96);opacity:0}100%{transform:scale(1);opacity:1}}

/* completed week in the Schedule list */
.wk.wk-done summary{background:var(--good-l);outline:none}
.wk.wk-done .wk-pct{color:#15803d;font-weight:800}
.wk[data-current="1"]:not(.wk-done) summary{outline:2px solid var(--brand)}

/* ===================== v4: key concepts, checklists, dashboard checks, multi ===================== */
.kc-head{font-weight:700;font-size:15px;color:var(--ink);margin:2px 0 9px;line-height:1.4}
ul.kc{margin:0 0 16px;padding-left:20px}
ul.kc li{font-size:14.5px;line-height:1.65;margin-bottom:7px;color:#1f2937}

.tasks-title{font-size:12.5px;color:var(--muted);margin:8px 0 9px;font-weight:600;line-height:1.5}
.apex-lesson{font-size:12.5px;color:var(--brand-d);background:var(--brand-bg);border:1px solid var(--brand-l);border-radius:8px;padding:7px 11px;margin-bottom:10px}
.task-list{display:flex;flex-direction:column;gap:9px;margin-bottom:8px}
.taskrow{display:flex;align-items:flex-start;gap:12px;padding:13px 13px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer;transition:background .12s,border-color .12s}
.taskrow:hover{background:#f8fafc}
.taskrow.done{background:var(--good-l);border-color:#86efac}
.taskrow input[type=checkbox]{width:24px;height:24px;margin-top:1px;accent-color:var(--brand);flex:0 0 auto;cursor:pointer}
.tk-main{display:flex;flex-direction:column;min-width:0}
.tk-label{font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.35}
.taskrow.done .tk-label{text-decoration:line-through;color:var(--muted)}
.tk-detail{font-size:12.5px;color:var(--muted);margin-top:3px;line-height:1.45}
.sess-count{font-size:12.5px;color:var(--muted);font-weight:700}

/* dashboard quick-check list */
.dash-list{display:flex;flex-direction:column;gap:9px;margin-top:4px}
.dash-row{display:flex;align-items:center;gap:12px;padding:12px 13px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer}
.dash-row:hover{background:#f8fafc}
.dash-row.done{background:var(--good-l);border-color:#86efac}
.dash-row input[type=checkbox]{width:24px;height:24px;accent-color:var(--good);flex:0 0 auto;cursor:pointer}
.dash-main{flex:1;display:flex;flex-direction:column;min-width:0}
.dash-main b{font-size:14.5px}
.dash-sub{font-size:12.5px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dash-count{font-size:12.5px;color:var(--muted);font-weight:700;flex:0 0 auto}

/* select-all-that-apply: toggled (pre-submit) state */
.opt.multi.sel{border-color:var(--brand);background:var(--brand-l);font-weight:600}
.opt.multi::before{content:"☐ ";opacity:.6}
.opt.multi.sel::before{content:"☑ ";opacity:1}
.completebtn{margin-top:14px}