/* ── RESET & ROOT ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --p:#4F46E5;--pd:#3730A3;--pl:#EEF2FF;--pm:#C7D2FE;
  --teal:#059669;--tl:#D1FAE5;
  --amber:#D97706;--al:#FEF3C7;
  --red:#DC2626;--rl:#FEE2E2;
  --blue:#2563EB;--bl:#DBEAFE;
  --text:#111827;--muted:#6B7280;--faint:#9CA3AF;
  --border:#E5E7EB;--border2:#D1D5DB;
  --bg:#F9FAFB;--surface:#FFFFFF;
  --r:10px;--r2:14px;--r3:18px;
  --sh:0 1px 3px rgba(0,0,0,.07),0 1px 2px rgba(0,0,0,.04);
  --sh-md:0 4px 20px rgba(0,0,0,.08);
  --sh-lg:0 20px 60px rgba(0,0,0,.15);
  --font-scale:1;
}
[data-theme="dark"]{
  --bg:#0F172A;--surface:#1E293B;--surface2:#273449;
  --border:#334155;--border2:#475569;
  --text:#F1F5F9;--muted:#94A3B8;--faint:#64748B;
  --pl:#1E1B4B;--pm:#3730A3;
  --tl:#064E3B;--al:#78350F;--rl:#7F1D1D;--bl:#1E3A5F;
  --sh:none;--sh-md:none;--sh-lg:0 20px 60px rgba(0,0,0,.5);
}
[data-high-contrast="true"]{
  --border:var(--border2);--muted:var(--text);--faint:var(--muted);
}
[data-reduce-motion="true"] *{transition:none!important;animation:none!important}

html{scroll-behavior:smooth;font-size:calc(15px * var(--font-scale))}
body{
  font-family:'DM Sans',sans-serif;
  background:var(--bg);color:var(--text);
  line-height:1.6;min-height:100vh;overflow-x:hidden;
  transition:background .3s,color .3s;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:99px}

/* ── NAV ── */
#main-nav{
  position:sticky;top:0;z-index:200;
  background:rgba(255,255,255,.93);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
  height:58px;display:flex;align-items:center;
  justify-content:space-between;padding:0 28px;
  transition:background .3s,border-color .3s;
}
[data-theme="dark"] #main-nav{background:rgba(15,23,42,.93)}
.logo{
  display:flex;align-items:center;gap:9px;
  font-family:'DM Serif Display',serif;font-size:19px;
  color:var(--text);cursor:pointer;user-select:none;
}
.logo-icon{
  width:30px;height:30px;background:var(--p);border-radius:8px;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  padding:6px 13px;border-radius:8px;
  font-size:13px;color:var(--muted);cursor:pointer;
  transition:background .15s,color .15s;
  border:none;background:none;font-family:'DM Sans',sans-serif;
}
.nav-link:hover{background:var(--bg);color:var(--text)}
.nav-link.active{background:var(--pl);color:var(--p);font-weight:500}
.nav-right{display:flex;align-items:center;gap:10px;position:relative}
.avatar{
  width:30px;height:30px;border-radius:99px;
  background:var(--pl);color:var(--p);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:600;cursor:pointer;
  transition:box-shadow .15s;
}
.avatar:hover{box-shadow:0 0 0 3px var(--pm)}
.avatar-menu{
  position:absolute;top:calc(100% + 10px);right:0;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);box-shadow:var(--sh-md);
  width:200px;padding:8px;z-index:300;
  opacity:0;pointer-events:none;transform:translateY(-6px);
  transition:opacity .15s,transform .15s;
}
.avatar-menu.open{opacity:1;pointer-events:all;transform:translateY(0)}
.avatar-menu-name{font-size:13px;font-weight:600;color:var(--text);padding:6px 8px 2px}
.avatar-menu-email{font-size:11px;color:var(--faint);padding:0 8px 8px}
.avatar-menu-divider{height:1px;background:var(--border);margin:4px 0}
.avatar-menu-item{
  display:block;width:100%;padding:8px 10px;border-radius:8px;
  font-size:13px;color:var(--red);font-family:'DM Sans',sans-serif;
  background:none;border:none;cursor:pointer;text-align:left;
  transition:background .12s;
}
.avatar-menu-item:hover{background:var(--rl)}

/* ── AD LEADERBOARD ── */
.ad-leaderboard{
  background:var(--surface);border-bottom:1px solid var(--border);
  padding:8px 0;display:flex;flex-direction:column;
  align-items:center;gap:4px;
}
.ad-label-top{font-size:10px;color:var(--faint);font-weight:600;letter-spacing:.04em;align-self:flex-start;padding-left:12px}
.ad-placeholder{
  width:728px;max-width:100%;height:90px;
  background:var(--bg);border:1px dashed var(--border2);
  border-radius:8px;display:flex;align-items:center;
  justify-content:center;font-size:13px;color:var(--faint);
}

/* ── LAYOUT ── */
.layout{display:grid;grid-template-columns:210px 1fr 266px;min-height:calc(100vh - 58px)}

/* ── SIDEBAR ── */
.sidebar{
  background:var(--surface);border-right:1px solid var(--border);
  padding:18px 10px;position:sticky;top:var(--sticky-top);
  height:calc(100vh - var(--sticky-top));overflow-y:auto;
  display:flex;flex-direction:column;gap:2px;
  transition:background .3s,border-color .3s;
}
.sb-section-label{
  font-size:10px;color:var(--faint);font-weight:600;
  letter-spacing:.07em;padding:10px 8px 4px;
}
.sb-item{
  display:flex;align-items:center;gap:9px;
  padding:8px 10px;border-radius:var(--r);
  font-size:13px;color:var(--muted);cursor:pointer;
  transition:background .12s,color .12s;
  border:none;background:none;width:100%;text-align:left;
  font-family:'DM Sans',sans-serif;
}
.sb-item svg{flex-shrink:0;opacity:.7}
.sb-item:hover{background:var(--bg);color:var(--text)}
.sb-item:hover svg{opacity:1}
.sb-item.active{background:var(--pl);color:var(--p);font-weight:500}
.sb-item.active svg{opacity:1}
.sb-badge{
  margin-left:auto;font-size:10px;font-weight:600;
  background:var(--rl);color:var(--red);
  padding:1px 6px;border-radius:99px;
}
.sb-new{
  margin-left:auto;font-size:10px;font-weight:600;
  background:var(--tl);color:var(--teal);
  padding:1px 6px;border-radius:99px;
}
.sb-divider{height:1px;background:var(--border);margin:6px 8px}
.subject-row{
  display:flex;align-items:center;gap:8px;
  padding:6px 10px;font-size:12px;color:var(--muted);
  cursor:pointer;border-radius:6px;transition:color .12s;
}
.subject-row:hover{color:var(--text)}
.sub-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.add-subject{color:var(--faint);font-size:11px;padding-left:18px}

/* ── MAIN ── */
/* The leaderboard ad (~106px) sits above .layout, so sticky offsets for
   sidebar and right-rail use a CSS custom property that JS sets on load */
:root{ --sticky-top: 58px; }
.main-content{padding:26px 30px;overflow-y:auto;min-width:0}
.page{display:none;animation:fadeIn .2s ease}
.page.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.page-header{margin-bottom:22px}
.page-header h1{font-family:'DM Serif Display',serif;font-size:24px;color:var(--text);margin-bottom:4px;line-height:1.3}
.page-header p{font-size:13px;color:var(--muted)}

/* ── RIGHT RAIL ── */
.right-rail{
  padding:18px 16px;border-left:1px solid var(--border);
  display:flex;flex-direction:column;gap:14px;
  position:sticky;top:var(--sticky-top);height:calc(100vh - var(--sticky-top));overflow-y:auto;
  transition:border-color .3s;
}
.rail-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:14px;
  transition:background .3s,border-color .3s;
}
.rail-title{font-size:12px;font-weight:600;color:var(--text);margin-bottom:10px}
.rail-ad-card{
  border:1px solid var(--border);border-radius:var(--r2);
  overflow:hidden;background:var(--surface);
}
.ad-placeholder-rail{
  min-height:140px;
  background:var(--bg);display:flex;align-items:center;
  justify-content:center;font-size:12px;color:var(--faint);
  border:1px dashed var(--border2);margin:8px;
  border-radius:8px;width:calc(100% - 16px);
}

/* ── STREAK DOTS ── */
.streak-dots{display:flex;gap:4px;flex-wrap:wrap}
.st-dot{
  width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:9px;font-weight:600;color:var(--faint);
  border:1px solid var(--border);
}
.st-dot.done{background:var(--amber);border-color:var(--amber);color:#fff}
.st-dot.today{border-color:var(--amber);color:var(--amber)}

/* ── EXAM BANNER ── */
.exam-banner{
  background:var(--pl);border:1px solid var(--pm);
  border-radius:var(--r2);padding:18px 22px;
  margin-bottom:22px;display:flex;
  align-items:center;justify-content:space-between;gap:16px;
  flex-wrap:wrap;
}
.eb-left{flex:1;min-width:0;}
.eb-tag{font-size:10px;color:var(--p);font-weight:600;letter-spacing:.06em;margin-bottom:4px}
.eb-title{font-family:'DM Serif Display',serif;font-size:18px;color:var(--pd);margin-bottom:8px}
.eb-bar-wrap{height:6px;background:rgba(79,70,229,.15);border-radius:99px;overflow:hidden;margin-bottom:4px;width:200px;max-width:100%}
.eb-bar{height:100%;background:var(--p);border-radius:99px}
.eb-pct{font-size:11px;color:var(--p)}
.countdown{display:flex;gap:8px;flex-wrap:wrap}
.cd-box{
  background:var(--surface);border:1px solid var(--pm);
  border-radius:var(--r);padding:8px 14px;text-align:center;min-width:56px;
}
.cd-num{font-family:'DM Serif Display',serif;font-size:22px;color:var(--pd);line-height:1}
.cd-lbl{font-size:10px;color:var(--p);margin-top:2px;font-weight:600;letter-spacing:.04em}

/* ── STATS ── */
.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:22px}
.stat-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:16px 18px;box-shadow:var(--sh);
  transition:box-shadow .15s,border-color .15s,background .3s;cursor:default;
}
.stat-card:hover{box-shadow:var(--sh-md);border-color:var(--border2)}
.sc-label{font-size:11px;color:var(--faint);font-weight:600;letter-spacing:.04em;margin-bottom:5px}
.sc-val{font-family:'DM Serif Display',serif;font-size:26px;color:var(--text);line-height:1}
.sc-sub{font-size:12px;margin-top:5px}
.sc-sub.up{color:var(--teal)}
.sc-sub.dn{color:var(--red)}
.sc-sub.muted{color:var(--faint)}

/* ── TWO COL ── */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}

/* ── CARDS ── */
.card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:18px 20px;box-shadow:var(--sh);
  margin-bottom:16px;transition:background .3s,border-color .3s;
}
.card-title-row{
  font-size:14px;font-weight:600;color:var(--text);
  margin-bottom:14px;display:flex;align-items:center;justify-content:space-between;gap:8px;
}
.section-heading{font-size:14px;font-weight:600;color:var(--text);margin-bottom:12px}
.ai-badge{
  font-size:10px;font-weight:600;color:var(--p);
  background:var(--pl);border:1px solid var(--pm);
  padding:2px 8px;border-radius:99px;
}

/* ── TASK LIST ── */
.task-list{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);overflow:hidden;margin-bottom:10px;
  transition:background .3s,border-color .3s;
}
.task-row{
  display:flex;align-items:center;gap:12px;
  padding:12px 16px;border-bottom:1px solid var(--border);
  cursor:pointer;transition:background .12s;
}
.task-row:last-child{border-bottom:none}
.task-row:hover{background:var(--bg)}
.task-row.done .t-name{text-decoration:line-through;color:var(--faint)}
.task-row.no-check{cursor:pointer}
.t-check{
  width:17px;height:17px;border-radius:99px;
  border:1.5px solid var(--border2);flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s,border-color .15s;
}
.task-row.done .t-check{background:var(--teal);border-color:var(--teal)}
.t-check svg{display:none}
.task-row.done .t-check svg{display:block}
.no-check .t-check{display:none}
.t-info{flex:1;min-width:0}
.t-name{font-size:13px;color:var(--text)}
.t-meta{font-size:11px;color:var(--faint);margin-top:1px}
.ghost-add-btn{
  background:none;border:none;color:var(--p);
  font-size:12px;cursor:pointer;font-family:'DM Sans',sans-serif;
  padding:4px 0;
}

/* ── PILLS ── */
.pill{font-size:10px;font-weight:600;padding:2px 8px;border-radius:99px;white-space:nowrap;flex-shrink:0}
.pill-p{background:var(--pl);color:var(--p)}
.pill-t{background:var(--tl);color:var(--teal)}
.pill-a{background:var(--al);color:var(--amber)}
.pill-b{background:var(--bl);color:var(--blue)}
.pill-r{background:var(--rl);color:var(--red)}

/* ── MASTERY BARS ── */
.mastery-list{display:flex;flex-direction:column;gap:10px}
.m-row{display:flex;align-items:center;gap:10px}
.m-name{font-size:12px;color:var(--muted);width:110px;flex-shrink:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.m-bar{flex:1;height:7px;background:var(--bg);border-radius:99px;overflow:hidden;border:1px solid var(--border)}
.m-fill{height:100%;border-radius:99px;transition:width .8s ease}
.m-pct{font-size:11px;color:var(--faint);width:32px;text-align:right;flex-shrink:0}

/* ── ALERTS ── */
.alert{
  padding:12px 16px;border-radius:var(--r);
  font-size:13px;margin-bottom:16px;
  display:flex;align-items:flex-start;gap:8px;
}
.alert-info{background:var(--bl);border:1px solid #BFDBFE;color:var(--blue)}
.alert-success{background:var(--tl);border:1px solid #A7F3D0;color:var(--teal)}
.alert-warning{background:var(--al);border:1px solid #FCD34D;color:var(--amber)}

/* ── UPLOAD ZONE ── */
.upload-zone{
  border:2px dashed var(--border2);border-radius:var(--r2);
  padding:40px 20px;text-align:center;cursor:pointer;
  transition:border-color .15s,background .15s;
  background:var(--surface);margin-bottom:16px;
}
.upload-zone:hover,.upload-zone.drag{border-color:var(--p);background:var(--pl)}
.upload-icon{font-size:32px;margin-bottom:10px}
.upload-title{font-size:15px;font-weight:500;color:var(--text);margin-bottom:4px}
.upload-sub{font-size:13px;color:var(--muted)}
#file-input{display:none}

/* ── NOTES LIST ── */
.notes-list{display:flex;flex-direction:column;gap:10px;margin-bottom:16px}
.note-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:14px 16px;
  display:flex;align-items:center;gap:12px;cursor:pointer;
  transition:box-shadow .15s,border-color .15s,background .3s;
}
.note-card:hover{border-color:var(--border2);box-shadow:var(--sh)}
.note-icon{width:36px;height:36px;border-radius:var(--r);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.note-info{flex:1;min-width:0}
.note-name{font-size:13px;font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.note-meta{font-size:11px;color:var(--faint);margin-top:2px}
.note-actions{display:flex;gap:6px;flex-shrink:0}
.note-btn{
  padding:4px 10px;border-radius:7px;font-size:11px;
  cursor:pointer;font-family:'DM Sans',sans-serif;font-weight:500;
  border:1px solid var(--border2);background:var(--bg);
  color:var(--muted);transition:color .12s,border-color .12s;
}
.note-btn:hover{color:var(--p);border-color:var(--p)}

/* ── FLASHCARD ── */
.fc-arena{
  display:flex;flex-direction:column;align-items:center;
  justify-content:center;gap:20px;padding:10px 0 20px;
}
.flashcard{
  width:100%;max-width:560px;cursor:pointer;
  perspective:1000px;
}
.fc-inner{
  position:relative;width:100%;height:200px;
  transform-style:preserve-3d;
  transition:transform .5s cubic-bezier(.4,0,.2,1);
}
.flashcard.flipped .fc-inner{transform:rotateY(180deg)}
.fc-front,.fc-back{
  position:absolute;inset:0;backface-visibility:hidden;
  border-radius:var(--r2);display:flex;flex-direction:column;
  align-items:center;justify-content:center;padding:28px;text-align:center;
}
.fc-front{background:var(--surface);border:1px solid var(--border);box-shadow:var(--sh-md)}
.fc-back{background:var(--pl);border:1px solid var(--pm);transform:rotateY(180deg)}
.fc-hint{font-size:10px;color:var(--faint);font-weight:600;letter-spacing:.06em;margin-bottom:10px}
.fc-question{font-family:'DM Serif Display',serif;font-size:19px;color:var(--text);line-height:1.4;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.fc-answer{font-size:14px;color:var(--pd);line-height:1.6}
.fc-progress-text{font-size:12px;color:var(--faint)}
.fc-rating{display:flex;gap:8px}
.rate-btn{
  padding:7px 18px;border-radius:var(--r);font-size:12px;
  font-weight:600;cursor:pointer;font-family:'DM Sans',sans-serif;
  border:1px solid transparent;transition:background .15s;
}
.rate-hard{background:var(--rl);color:var(--red);border-color:#FCA5A5}
.rate-hard:hover{background:#FCA5A5}
.rate-ok{background:var(--al);color:var(--amber);border-color:#FCD34D}
.rate-ok:hover{background:#FCD34D}
.rate-easy{background:var(--tl);color:var(--teal);border-color:#6EE7B7}
.rate-easy:hover{background:#6EE7B7}
.fc-nav{display:flex;gap:10px}

/* ── BUTTONS ── */
.btn-primary{
  padding:8px 18px;background:var(--p);color:#fff;
  border:none;border-radius:var(--r);font-size:13px;
  font-weight:600;cursor:pointer;font-family:'DM Sans',sans-serif;
  transition:background .15s;
}
.btn-primary:hover{background:var(--pd)}
.btn-primary:disabled{opacity:.6;cursor:not-allowed}
.btn-ghost{
  padding:8px 18px;background:var(--surface);color:var(--text);
  border:1px solid var(--border2);border-radius:var(--r);
  font-size:13px;font-weight:500;cursor:pointer;
  font-family:'DM Sans',sans-serif;transition:background .15s;
}
.btn-ghost:hover{background:var(--bg)}
.btn-sm{padding:5px 12px;font-size:12px}

/* ── INPUTS ── */
.gen-textarea{
  width:100%;border:1px solid var(--border2);border-radius:var(--r);
  padding:12px;font-size:13px;font-family:'DM Sans',sans-serif;
  color:var(--text);background:var(--bg);resize:vertical;
  outline:none;transition:border-color .15s,box-shadow .15s;
  min-height:80px;
}
.gen-textarea:focus{border-color:var(--p);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.text-input{
  border:1px solid var(--border2);border-radius:var(--r);
  padding:9px 12px;font-size:13px;font-family:'DM Sans',sans-serif;
  color:var(--text);background:var(--surface);outline:none;
  transition:border-color .15s,box-shadow .15s;height:46px;
}
.text-input:focus{border-color:var(--p);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
.full-select{
  width:100%;padding:9px 12px;border:1px solid var(--border2);
  border-radius:var(--r);font-size:13px;font-family:'DM Sans',sans-serif;
  color:var(--text);background:var(--surface);outline:none;
  transition:border-color .15s;height:46px;cursor:pointer;
}
.full-select:focus{border-color:var(--p)}
.mini-select{
  padding:6px 10px;border-radius:var(--r);border:1px solid var(--border2);
  font-size:13px;font-family:'DM Sans',sans-serif;color:var(--text);
  background:var(--surface);cursor:pointer;outline:none;
}
.mini-select:focus{border-color:var(--p)}
.gen-controls{display:flex;align-items:center;gap:8px;margin-top:10px;flex-wrap:wrap}
.ctrl-label{font-size:12px;color:var(--muted)}

/* ── GENERATED CARDS ── */
.gen-card{
  background:var(--bg);border:1px solid var(--border);
  border-radius:var(--r);padding:14px 16px;margin-top:10px;
}
.gen-card-q{font-size:13px;font-weight:500;color:var(--text);margin-bottom:6px}
.gen-card-a{font-size:12px;color:var(--muted);border-top:1px solid var(--border);padding-top:6px}

/* ── CHAT ── */
.chat-window{
  display:flex;flex-direction:column;height:440px;
  border:1px solid var(--border);border-radius:var(--r2);
  overflow:hidden;background:var(--surface);margin-bottom:16px;
  transition:background .3s,border-color .3s;
}
.chat-msgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px}
.msg{max-width:82%;padding:10px 14px;border-radius:12px;font-size:13px;line-height:1.55;white-space:pre-wrap}
.msg.user{align-self:flex-end;background:var(--p);color:#fff;border-radius:12px 12px 3px 12px}
.msg.ai{align-self:flex-start;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:12px 12px 12px 3px}
.msg.ai.typing{color:var(--faint);font-style:italic}
.chat-input-row{border-top:1px solid var(--border);padding:12px 14px;display:flex;gap:8px}
.chat-input{
  flex:1;border:1px solid var(--border2);border-radius:var(--r);
  padding:8px 12px;font-size:13px;font-family:'DM Sans',sans-serif;
  color:var(--text);background:var(--surface);outline:none;
  resize:none;transition:border-color .15s;
}
.chat-input:focus{border-color:var(--p)}
.chat-send{
  padding:8px 18px;background:var(--p);color:#fff;border:none;
  border-radius:var(--r);font-size:13px;font-weight:500;cursor:pointer;
  font-family:'DM Sans',sans-serif;transition:background .15s;white-space:nowrap;
}
.chat-send:hover{background:var(--pd)}
.chat-send:disabled{opacity:.5;cursor:not-allowed}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.chip{
  padding:6px 14px;border:1px solid var(--border2);
  border-radius:99px;font-size:12px;color:var(--muted);cursor:pointer;
  background:var(--surface);transition:all .12s;font-family:'DM Sans',sans-serif;
}
.chip:hover{background:var(--pl);border-color:var(--p);color:var(--p)}

/* ── PROGRESS CHARTS ── */
.week-chart,.acc-chart{display:flex;gap:8px;align-items:flex-end;height:140px;border-bottom:1px solid var(--border);padding-bottom:0;margin-bottom:8px}
.wc-col,.ac-col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;gap:4px}
.wc-bar,.ac-bar{width:100%;background:var(--pl);border:1px solid var(--pm);border-radius:5px 5px 0 0;min-height:4px;transition:height .6s ease}
.wc-bar.today,.ac-bar.now{background:var(--p);border-color:var(--pd)}
.wc-bar.future{background:var(--bg);border-color:var(--border)}
.wc-lbl,.ac-lbl{font-size:10px;color:var(--faint)}
.today-lbl,.now-lbl{color:var(--p);font-weight:600}
.subject-breakdown{display:flex;flex-direction:column;gap:10px}
.sb-row2{display:flex;align-items:center;gap:12px}
.sb-sub{font-size:13px;color:var(--text);width:90px;flex-shrink:0}
.sb-bar-wrap{flex:1;height:8px;background:var(--bg);border-radius:99px;overflow:hidden;border:1px solid var(--border)}
.sb-hrs{font-size:12px;color:var(--faint);width:36px;text-align:right}

/* ── RING GAUGE ── */
.ring-wrap{position:relative;width:140px;height:140px;margin:0 auto 14px}
.ring-svg{transform:rotate(-90deg)}
.ring-track{fill:none;stroke:var(--border);stroke-width:10}
.ring-fill{fill:none;stroke:var(--p);stroke-width:10;stroke-linecap:round;stroke-dasharray:345;stroke-dashoffset:131;transition:stroke-dashoffset 1.5s linear}
.ring-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.ring-pct{font-family:'DM Serif Display',serif;font-size:28px;color:var(--text);line-height:1}
.ring-lbl{font-size:10px;color:var(--faint);font-weight:600;letter-spacing:.06em}

/* ── STUDY PLAN ── */
.plan-day{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:14px 16px;margin-bottom:10px;
  transition:background .3s,border-color .3s;
}
.plan-day-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.plan-day-title{font-size:13px;font-weight:600;color:var(--text)}
.plan-pill{
  font-size:10px;color:var(--muted);background:var(--bg);
  border:1px solid var(--border);padding:2px 8px;border-radius:99px;
}
.plan-tasks{display:flex;flex-direction:column;gap:6px}
.pt{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);padding:4px 0;flex-wrap:wrap}
.pt-dot{width:6px;height:6px;border-radius:50%;flex-shrink:0}

/* ── QUIZ ── */
.quiz-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:20px 22px;margin-bottom:12px;
  transition:background .3s,border-color .3s;
}
.quiz-q-num{font-size:11px;font-weight:600;color:var(--faint);letter-spacing:.04em;margin-bottom:8px}
.quiz-q-text{font-family:'DM Serif Display',serif;font-size:17px;color:var(--text);margin-bottom:14px;line-height:1.4}
.quiz-option{
  width:100%;padding:12px 14px;border:1px solid var(--border2);
  border-radius:var(--r);font-size:13px;color:var(--text);
  background:var(--surface);cursor:pointer;text-align:left;
  font-family:'DM Sans',sans-serif;transition:background .12s,border-color .12s;
  margin-bottom:8px;display:flex;align-items:center;gap:10px;
}
.quiz-option:hover{background:var(--bg);border-color:var(--border2)}
.quiz-option.selected{background:var(--pl);border-color:var(--pm);color:var(--p)}
.quiz-option.correct{background:var(--tl);border-color:#6EE7B7;color:var(--teal)}
.quiz-option.wrong{background:var(--rl);border-color:#FCA5A5;color:var(--red)}
.quiz-radio{width:16px;height:16px;border-radius:99px;border:1.5px solid var(--border2);flex-shrink:0;transition:background .12s,border-color .12s}
.quiz-option.selected .quiz-radio{background:var(--p);border-color:var(--p)}
.quiz-progress{height:6px;background:var(--pl);border-radius:99px;overflow:hidden;margin-bottom:6px}
.quiz-progress-fill{height:100%;background:var(--p);border-radius:99px;transition:width .3s}
.quiz-results{text-align:center;padding:20px 0}
.quiz-score-big{font-family:'DM Serif Display',serif;font-size:52px;color:var(--p);line-height:1}
.feedback-correct{background:var(--tl);border-left:3px solid var(--teal);padding:10px 14px;border-radius:0 var(--r) var(--r) 0;font-size:12px;color:var(--teal);margin-top:8px}
.feedback-wrong{background:var(--rl);border-left:3px solid var(--red);padding:10px 14px;border-radius:0 var(--r) var(--r) 0;font-size:12px;color:var(--red);margin-top:8px}

/* ── PRACTICE EXAM ── */
.exam-q-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:20px;margin-bottom:12px;
  transition:background .3s,border-color .3s;
}
.exam-q-num{font-size:11px;color:var(--faint);font-weight:600;letter-spacing:.04em;margin-bottom:8px;text-transform:uppercase}
.exam-q-text{font-family:'DM Serif Display',serif;font-size:16px;color:var(--text);margin-bottom:12px;line-height:1.4}
.exam-feedback-correct{background:var(--tl);border-left:3px solid var(--teal);padding:12px 14px;border-radius:0 var(--r) var(--r) 0;font-size:13px;color:var(--teal);margin-top:8px}
.exam-feedback-improve{background:var(--al);border-left:3px solid var(--amber);padding:12px 14px;border-radius:0 var(--r) var(--r) 0;font-size:13px;color:var(--amber);margin-top:8px}
.exam-results-card{
  background:var(--pl);border:1px solid var(--pm);border-radius:var(--r2);
  padding:22px;text-align:center;margin-bottom:16px;
}

/* ── FOCUS TIMER ── */
.timer-ring-wrap{position:relative;width:200px;height:200px}
.timer-text{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.timer-digits{font-family:'DM Serif Display',serif;font-size:44px;color:var(--text);line-height:1}
.timer-mode-lbl{font-size:11px;color:var(--faint);font-weight:600;letter-spacing:.06em;margin-top:4px}
.mode-chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.mode-chip{
  padding:5px 12px;border-radius:99px;font-size:12px;
  cursor:pointer;background:transparent;color:var(--muted);
  border:none;font-family:'DM Sans',sans-serif;transition:all .12s;
}
.mode-chip.active{background:var(--pl);color:var(--p);font-weight:500}
.mode-chip:hover{color:var(--text)}
.ai-tip-box{
  background:var(--pl);border-radius:var(--r);padding:10px 12px;
  font-size:12px;color:var(--pd);line-height:1.6;
}
.session-dots{display:flex;gap:6px;flex-wrap:wrap}
.s-dot{
  width:28px;height:28px;border-radius:99px;border:1.5px solid var(--border2);
  display:flex;align-items:center;justify-content:center;font-size:10px;color:var(--faint);
}
.s-dot.done{background:var(--p);border-color:var(--p);color:#fff}
.s-dot.current{border-color:var(--p);background:var(--pl)}

/* ── ESSAY FEEDBACK ── */
.essay-grade-card{
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);padding:22px;margin-bottom:16px;
  transition:background .3s;
}
.essay-grade-big{font-family:'DM Serif Display',serif;font-size:52px;line-height:1;margin-bottom:8px}
.score-tiles{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.score-tile{
  border-radius:var(--r);padding:10px 14px;text-align:center;
  min-width:90px;flex:1;
}
.score-tile-label{font-size:10px;font-weight:600;letter-spacing:.04em;margin-bottom:4px}
.score-tile-val{font-family:'DM Serif Display',serif;font-size:22px;line-height:1}
.score-good{background:var(--tl);color:var(--teal)}
.score-mid{background:var(--al);color:var(--amber)}
.score-low{background:var(--rl);color:var(--red)}
.feedback-section{border-left:3px solid;padding:12px 14px;border-radius:0 var(--r) var(--r) 0;margin-bottom:10px}
.feedback-section.strengths{border-color:var(--teal);background:var(--tl)}
.feedback-section.improvements{border-color:var(--amber);background:var(--al)}
.feedback-section.nextgrade{border-color:var(--p);background:var(--pl)}
.feedback-section-label{font-size:10px;font-weight:600;letter-spacing:.05em;margin-bottom:6px;text-transform:uppercase}

/* vocab rating buttons - display controlled entirely by JS inline style */
#vocab-rating-btns{ gap:8px; margin-top:10px; }

/* ── VOCAB ── */
.vocab-term{font-family:'DM Serif Display',serif;font-size:26px;color:var(--text);text-align:center;margin-bottom:4px}
.vocab-def-box{
  background:var(--pl);border-radius:var(--r);padding:12px;
  font-size:13px;color:var(--pd);line-height:1.6;margin-top:10px;
}
/* Hook class for event delegation — no visual styles needed beyond cursor */
.vocab-term-row{cursor:pointer;}

/* ── PAGE BOTTOM AD ── */
.page-ad-bottom{
  margin-top:24px;padding-top:16px;
  border-top:1px solid var(--border);
  display:flex;flex-direction:column;align-items:center;gap:6px;
}
.ad-placeholder-inline{
  width:100%;max-width:728px;height:90px;
  background:var(--bg);border:1px dashed var(--border2);
  border-radius:8px;display:flex;align-items:center;
  justify-content:center;font-size:13px;color:var(--faint);
}

/* ── SPINNER ── */
.spinner{
  display:inline-block;width:13px;height:13px;
  border:2px solid rgba(255,255,255,.3);border-top-color:#fff;
  border-radius:50%;animation:spin .7s linear infinite;
  vertical-align:middle;margin-right:5px;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ── TOAST ── */
#toast-container{
  position:fixed;bottom:24px;right:24px;z-index:9999;
  display:flex;flex-direction:column-reverse;gap:8px;pointer-events:none;
}
.toast{
  background:#1F2937;color:#fff;padding:10px 18px;
  border-radius:var(--r);font-size:13px;font-family:'DM Sans',sans-serif;
  max-width:340px;pointer-events:none;
  animation:toastIn .3s ease forwards;
}
[data-theme="dark"] .toast{background:#F1F5F9;color:#111827}
@keyframes toastIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.toast.out{animation:toastOut .3s ease forwards}
@keyframes toastOut{from{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(10px)}}

/* ── ACCESSIBILITY PANEL ── */
.a11y-btn{
  position:fixed;bottom:20px;right:20px;z-index:500;
  width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:1px solid var(--border);
  box-shadow:var(--sh);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  color:var(--muted);transition:transform .15s,color .15s,background .3s;
}
.a11y-btn:hover{transform:scale(1.05);color:var(--text)}
.a11y-panel{
  position:fixed;bottom:72px;right:20px;z-index:501;
  background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r2);box-shadow:var(--sh-md);
  width:280px;overflow:hidden;
  transform-origin:bottom right;
  transform:scale(.9);opacity:0;pointer-events:none;
  transition:transform .2s,opacity .2s,background .3s;
}
.a11y-panel.open{transform:scale(1);opacity:1;pointer-events:all}
.a11y-header{padding:14px;font-size:14px;font-weight:600;color:var(--text)}
.a11y-divider{height:1px;background:var(--border)}
.a11y-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 14px;height:52px;
}
.a11y-label{font-size:13px;font-weight:500;color:var(--text)}
.theme-toggle{
  display:flex;border:1px solid var(--border2);border-radius:8px;overflow:hidden;
}
.tt-seg{
  padding:5px 8px;font-size:11px;font-weight:500;cursor:pointer;
  background:transparent;border:none;color:var(--muted);
  font-family:'DM Sans',sans-serif;transition:background .15s,color .15s;
}
.tt-seg.active{background:var(--p);color:#fff}
.size-control{display:flex;align-items:center;gap:8px}
.size-btn{
  width:28px;height:28px;border-radius:99px;border:1px solid var(--border2);
  background:var(--bg);cursor:pointer;font-size:16px;
  display:flex;align-items:center;justify-content:center;color:var(--text);
  font-family:'DM Sans',sans-serif;transition:background .12s;
}
.size-btn:hover{background:var(--pl);border-color:var(--p)}
.size-btn:disabled{opacity:.4;cursor:not-allowed}
.size-label{font-size:12px;color:var(--faint);width:52px;text-align:center}
.toggle-switch{position:relative;display:inline-block;width:36px;height:20px;cursor:pointer}
.toggle-switch input{opacity:0;width:0;height:0}
.ts-track{
  position:absolute;inset:0;background:var(--border2);border-radius:99px;
  transition:background .15s;
}
.ts-track::after{
  content:'';position:absolute;width:16px;height:16px;border-radius:50%;
  background:#fff;top:2px;left:2px;transition:transform .15s;
}
.toggle-switch input:checked + .ts-track{background:var(--p)}
.toggle-switch input:checked + .ts-track::after{transform:translateX(16px)}

/* ── RESPONSIVE ── */
@media(max-width:1100px){
  .right-rail{display:none}
  .layout{grid-template-columns:210px 1fr}
}
@media(max-width:768px){
  .layout{grid-template-columns:1fr}
  .sidebar{display:none}
  .main-content{padding:16px}
  .stats-row{grid-template-columns:1fr 1fr}
  .two-col{grid-template-columns:1fr}
  .nav-links{display:none}
  .ad-placeholder{width:320px;height:50px}
  .exam-banner{flex-direction:column}
}

/* ── MODAL BACKDROP ── */
.modal-backdrop{
  position:fixed;inset:0;background:rgba(0,0,0,.5);
  z-index:800;opacity:0;pointer-events:none;
  transition:opacity .2s;backdrop-filter:blur(4px);
}
.modal-backdrop.open{opacity:1;pointer-events:all}

/* ── PAYWALL MODAL ── */
.paywall-modal,.payment-modal{
  position:fixed;top:50%;left:50%;z-index:900;
  transform:translate(-50%,-46%) scale(.96);
  opacity:0;pointer-events:none;
  transition:transform .25s,opacity .25s;
  background:var(--surface);border:1px solid var(--border);
  border-radius:20px;box-shadow:0 24px 80px rgba(0,0,0,.2);
  padding:32px;width:90%;max-width:460px;max-height:90vh;overflow-y:auto;
}
.paywall-modal.open,.payment-modal.open{
  transform:translate(-50%,-50%) scale(1);opacity:1;pointer-events:all;
}
.paywall-close{
  position:absolute;top:16px;right:16px;
  background:var(--bg);border:1px solid var(--border);
  border-radius:50%;width:30px;height:30px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:13px;color:var(--muted);
  transition:background .15s;
}
.paywall-close:hover{background:var(--border)}
.paywall-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--al);color:var(--amber);
  font-size:11px;font-weight:700;letter-spacing:.06em;
  padding:4px 12px;border-radius:99px;margin-bottom:14px;
}
.paywall-title{font-family:'DM Serif Display',serif;font-size:26px;color:var(--text);margin-bottom:8px}
.paywall-sub{font-size:14px;color:var(--muted);margin-bottom:22px}
.paywall-plans{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}
.paywall-plan{
  border:2px solid var(--border);border-radius:12px;
  padding:14px;cursor:pointer;transition:border-color .15s,background .15s;
  position:relative;text-align:center;
}
.paywall-plan:hover{border-color:var(--pm)}
.paywall-plan.active{border-color:var(--p);background:var(--pl)}
.plan-label{font-size:12px;font-weight:600;color:var(--muted);margin-bottom:6px}
.plan-price{font-family:'DM Serif Display',serif;font-size:24px;color:var(--text);line-height:1}
.plan-price span{font-size:13px;font-family:'DM Sans',sans-serif;color:var(--muted)}
.plan-desc{font-size:11px;color:var(--faint);margin-top:4px}
.plan-badge-tag{
  position:absolute;top:-10px;left:50%;transform:translateX(-50%);
  background:var(--p);color:#fff;font-size:10px;font-weight:700;
  padding:2px 10px;border-radius:99px;letter-spacing:.04em;white-space:nowrap;
}
.paywall-features{
  background:var(--bg);border-radius:10px;padding:14px 16px;
  margin-bottom:20px;display:flex;flex-direction:column;gap:7px;
}
.pf-row{font-size:13px;color:var(--text)}
.paywall-btn{
  width:100%;padding:13px;background:var(--p);color:#fff;
  border:none;border-radius:10px;font-size:15px;font-weight:600;
  cursor:pointer;font-family:'DM Sans',sans-serif;transition:background .15s;
  margin-bottom:10px;
}
.paywall-btn:hover{background:var(--pd)}
.paywall-guarantee{font-size:12px;color:var(--faint);text-align:center}

/* ── PAYMENT MODAL ── */
.payment-header{text-align:center;margin-bottom:22px}
.payment-bank-logo{font-size:40px;margin-bottom:8px}
.payment-bank-name{font-size:14px;font-weight:600;color:var(--muted);margin-bottom:6px}
.payment-amount{font-family:'DM Serif Display',serif;font-size:28px;color:var(--text)}
.payment-details{
  background:var(--bg);border-radius:12px;padding:16px;
  display:flex;flex-direction:column;gap:12px;margin-bottom:6px;
}
.payment-field-row{display:flex;justify-content:space-between;align-items:center;gap:10px}
.pf-label{font-size:12px;color:var(--muted);font-weight:500;flex-shrink:0}
.pf-val{font-size:13px;color:var(--text);font-weight:600;text-align:right;word-break:break-all}
.payment-note{
  background:var(--al);border-radius:8px;padding:10px 12px;
  font-size:12px;color:var(--amber);line-height:1.5;margin-top:4px;
}

/* ── PREMIUM LOCK OVERLAY on sidebar items ── */
.sb-item .sb-lock{
  margin-left:auto;font-size:11px;color:var(--amber);
}
.sb-item .sb-lock::before{content:'🔒'}

/* ── UPGRADE NAV BUTTON ── */
.upgrade-btn{
  padding:5px 12px;background:linear-gradient(135deg,var(--amber),#F59E0B);
  color:#fff;border:none;border-radius:7px;font-size:12px;font-weight:600;
  cursor:pointer;font-family:'DM Sans',sans-serif;transition:opacity .15s;
  white-space:nowrap;
}
.upgrade-btn:hover{opacity:.9}

/* ── EMPTY STATES ── */
.empty-state{
  text-align:center;padding:48px 20px;color:var(--muted);
}
.empty-state-icon{font-size:40px;margin-bottom:12px}
.empty-state-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:6px}
.empty-state-sub{font-size:13px;color:var(--muted);line-height:1.6}

/* ── QUIZ DROP ZONE ── */
.quiz-drop-zone{
  border:1.5px dashed var(--border2);border-radius:var(--r);
  padding:12px 16px;font-size:13px;color:var(--muted);
  cursor:pointer;transition:border-color .15s,background .15s;
  display:flex;align-items:center;justify-content:center;
  min-height:48px;background:var(--bg);
}
.quiz-drop-zone:hover,.quiz-drop-zone.drag{border-color:var(--p);background:var(--pl);color:var(--p)}

/* ── ACTIVE SUBJECT in sidebar ── */
.subject-row.subject-active{color:var(--p);font-weight:600;background:var(--pl);border-radius:8px}
.sb-del-btn{
  margin-left:auto;background:none;border:none;cursor:pointer;
  color:var(--faint);font-size:14px;padding:0 2px;line-height:1;
  transition:color .12s;
}
.sb-del-btn:hover{color:var(--red)}

/* ── AVATAR MENU DANGER ITEM ── */
.avatar-menu-item-danger { color: var(--red) !important; }
.avatar-menu-item-danger:hover { background: var(--rl) !important; }

/* ── SETTINGS TABS ── */
.settings-tabs{display:flex;gap:4px;background:var(--bg);border-radius:10px;padding:4px;margin-bottom:4px}
.settings-tab{flex:1;padding:7px;text-align:center;font-size:13px;font-weight:500;color:var(--muted);border-radius:7px;cursor:pointer;border:none;background:none;font-family:'DM Sans',sans-serif;transition:.15s}
.settings-tab.active{background:var(--surface);color:var(--text);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.settings-pane{display:none}.settings-pane.active{display:block}
.settings-label{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}

/* ── LANGUAGE PILLS ── */
.lang-pill{padding:7px 16px;border-radius:99px;border:1.5px solid var(--border2);background:var(--surface);font-size:13px;font-weight:500;color:var(--muted);cursor:pointer;font-family:'DM Sans',sans-serif;transition:.15s}
.lang-pill.active{background:var(--p);border-color:var(--p);color:#fff}
.lang-pill:hover:not(.active){border-color:var(--p);color:var(--p)}

/* ── SUBJECT PICKER ── */
.subject-picker-grid{display:flex;flex-wrap:wrap;gap:8px}
.subject-pill{
  display:flex;align-items:center;gap:6px;padding:6px 12px;
  border-radius:99px;border:1.5px solid var(--border2);
  background:var(--surface);font-size:13px;font-weight:500;
  color:var(--text);cursor:pointer;font-family:'DM Sans',sans-serif;
  transition:border-color .12s,background .12s;
}
.subject-pill:hover{border-color:var(--pill-color,var(--p));background:var(--bg)}
.subject-pill.added{background:var(--pl);border-color:var(--p);color:var(--p)}
.subject-pill-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}