.fc-page{max-width:1120px;margin-inline:auto;display:flex;flex-direction:column;gap:16px}

.fc-hero{padding:4px 2px 18px;border-bottom:1px solid var(--border-subtle);margin-bottom:18px}
.fc-kicker{display:inline-flex;align-items:center;gap:6px;font-size:calc(12px * var(--fs-scale, 1));font-weight:800;color:var(--accent);letter-spacing:.02em}
.fc-h1{margin:6px 0 4px;font-size:calc(26px * var(--fs-scale, 1));font-weight:900;letter-spacing:-.02em;line-height:1.3;color:var(--text-primary)}
.fc-hero p{margin:0;font-size:calc(13px * var(--fs-scale, 1));color:var(--text-secondary);line-height:1.8;max-width:62ch}

.fc-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 24px;
}
.fc-sum {
  flex: 1 1 150px;
  padding: 18px 16px;
  border-radius: var(--r-lg);
  background: var(--surface-raised);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
  animation: fc-rise .5s cubic-bezier(.22,1,.36,1) both;
}
.fc-sum:nth-child(2) { animation-delay: .05s; }
.fc-sum:nth-child(3) { animation-delay: .1s; }
.fc-sum:nth-child(4) { animation-delay: .15s; }
.fc-sum b {
  font-size: calc(28px * var(--fs-scale, 1));
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  color: var(--text-primary);
}
.fc-sum span {
  font-size: calc(13px * var(--fs-scale, 1));
  color: var(--text-secondary);
  font-weight: 600;
}
.fc-sum--due b {
  color: var(--accent);
}
.fc-start-all {
  flex: 1 1 100%;
  height: 52px;
  border-radius: var(--r-md);
  font-size: calc(15px * var(--fs-scale, 1));
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 8px 24px -8px color-mix(in srgb, var(--accent) 60%, transparent);
}
.fc-start-all:disabled {
  opacity: .45;
  cursor: not-allowed;
  box-shadow: none;
}
.fc-start-all svg {
  width: 20px;
  height: 20px;
}

.fc-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.fc-chips{display:flex;gap:6px;flex-wrap:wrap}
.fc-chip{
  padding:6px 13px;border-radius:99px;font-size:calc(12.5px * var(--fs-scale, 1));font-weight:700;cursor:pointer;
  background:transparent;border:1px solid var(--border-subtle);color:var(--text-secondary);
  transition:background .2s,color .2s,border-color .2s;
}
.fc-chip:hover{color:var(--text-primary);border-color:var(--border-strong,var(--border-subtle))}
.fc-chip.on{background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,transparent)}
.fc-toolbar .btn svg{width:15px;height:15px}

.fc-decks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.fc-deck{
  padding:16px;border-radius:var(--r-lg);background:var(--surface-raised);
  border:1px solid var(--border-subtle);display:flex;flex-direction:column;gap:10px;
  transition:transform .25s cubic-bezier(.22,1,.36,1),border-color .25s,box-shadow .25s;
  animation:fc-rise .55s cubic-bezier(.22,1,.36,1) both;
}
.fc-deck.is-idle{opacity:.78}
.fc-deck-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.fc-deck-head b{font-size:calc(14.5px * var(--fs-scale, 1));font-weight:800;line-height:1.6}
.fc-deck-n{font-size:calc(12px * var(--fs-scale, 1));color:var(--text-tertiary);white-space:nowrap;font-variant-numeric:tabular-nums}
.fc-deck-badges{display:flex;gap:6px;flex-wrap:wrap;min-height:4px}
.fc-badge{font-size:calc(11.5px * var(--fs-scale, 1));font-weight:700;padding:3px 9px;border-radius:99px;background:color-mix(in srgb,var(--text-primary) 6%,transparent);color:var(--text-secondary)}
.fc-badge--due{background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.fc-badge--new{background:color-mix(in srgb,var(--color-cyan,var(--accent)) 16%,transparent);color:var(--color-cyan,var(--accent))}
.fc-badge--off{background:color-mix(in srgb,var(--text-primary) 8%,transparent);color:var(--text-tertiary);border:1px dashed color-mix(in srgb,var(--border-strong,var(--border-subtle)) 80%,transparent)}
.fc-deck.is-disabled{opacity:.62}
.fc-deck.is-disabled .fc-deck-prog i{background:var(--border-strong,var(--border-subtle));opacity:.5}
.fc-deck.is-disabled .fc-deck-foot .btn{pointer-events:none;cursor:not-allowed}
.fc-deck-prog{height:5px;border-radius:99px;background:color-mix(in srgb,var(--border-strong,var(--border-subtle)) 50%,transparent);overflow:hidden}
.fc-deck-prog i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--color-cyan,var(--accent)));transition:width .7s cubic-bezier(.22,1,.36,1)}
.fc-deck-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:calc(12px * var(--fs-scale, 1));color:var(--text-tertiary)}

.fc-create{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:16px;border-radius:var(--r-lg);
  background:var(--surface-raised);border:1px solid var(--border-subtle);
  animation:fc-rise .35s ease both;
}
.fc-field{display:flex;flex-direction:column;gap:6px;min-width:0}
.fc-field>span{font-size:calc(12.5px * var(--fs-scale, 1));font-weight:800}
.fc-field--wide{grid-column:1 / -1}
.fc-field textarea.set-input{resize:vertical;min-height:72px;font-family:inherit}
.fc-form{display:contents}
.fc-form-actions{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;gap:10px}
.fc-form-actions small{color:var(--color-rose);font-size:calc(12px * var(--fs-scale, 1))}
.fc-ulist{grid-column:1 / -1;list-style:none;margin:6px 0 0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:260px;overflow:auto}
.fc-ulist li{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:9px 12px;border-radius:var(--r-sm);border:1px solid var(--border-subtle)}
.fc-ulist li div{display:flex;flex-direction:column;gap:2px;min-width:0}
.fc-ulist b{font-size:calc(13px * var(--fs-scale, 1))}
.fc-ulist span{font-size:calc(12px * var(--fs-scale, 1));color:var(--text-tertiary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fc-del{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;flex-shrink:0;background:transparent;border:1px solid var(--border-subtle);color:var(--text-tertiary);cursor:pointer}
.fc-del:hover{color:var(--color-rose);border-color:color-mix(in srgb,var(--color-rose) 40%,transparent)}
.fc-del svg{width:14px;height:14px}
.fc-empty-note{grid-column:1 / -1;margin:0;font-size:calc(13px * var(--fs-scale, 1));color:var(--text-tertiary);text-align:center;padding:14px}

.fc-study{max-width:760px;gap:14px}
.fc-study-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.fc-study-head .btn svg{width:14px;height:14px;transform:scaleX(-1)}
.fc-study-title{display:flex;flex-direction:column;align-items:center;gap:2px;min-width:0}
.fc-study-title small{font-size:calc(12px * var(--fs-scale, 1));color:var(--text-tertiary);max-width:44ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fc-study-title b{font-size:calc(13.5px * var(--fs-scale, 1));font-weight:800}
.fc-count{font-size:calc(13px * var(--fs-scale, 1));font-weight:800;font-variant-numeric:tabular-nums;color:var(--text-secondary);white-space:nowrap}
.fc-count i{font-style:normal;color:var(--text-tertiary)}
.fc-bar{height:6px;border-radius:99px;background:color-mix(in srgb,var(--border-strong,var(--border-subtle)) 50%,transparent);overflow:hidden}
.fc-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--color-cyan,var(--accent)));transition:width .5s cubic-bezier(.22,1,.36,1)}

.fc-stage{perspective:1400px;min-height:300px}
.fc-card{
  position:relative;min-height:300px;cursor:pointer;
  transform-style:preserve-3d;
  transition:transform .6s cubic-bezier(.22,1,.36,1);
}
.fc-stage{animation:fc-enter .45s cubic-bezier(.22,1,.36,1) backwards}
.fc-card.is-flipped{transform:rotateX(0) rotateY(180deg)}
.fc-face{
  position:absolute;inset:0;border-radius:24px;padding:52px 28px 26px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px;
  background:var(--surface-raised);border:1px solid var(--border-subtle);
  box-shadow:0 24px 48px -30px rgba(0,0,0,.45);
  -webkit-backface-visibility:hidden;backface-visibility:hidden;
  overflow:auto;
}
.fc-back{transform:rotateY(180deg);align-items:stretch;text-align:start;justify-content:flex-start}
.fc-back .fc-title{text-align:center}
.fc-tag{
  position:absolute;top:16px;inset-inline:0;margin-inline:auto;width:fit-content;
  font-size:calc(11px * var(--fs-scale, 1));font-weight:800;padding:3px 10px;border-radius:99px;
  background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);
}
.fc-title{font-size:clamp(18px,2.4vw,24px);font-weight:900;line-height:1.7}
.fc-title--sm{font-size:calc(14px * var(--fs-scale, 1));color:var(--text-secondary);font-weight:700}
.fc-fname{display:block}
.fc-formula-hint,.fc-hint{font-size:calc(12px * var(--fs-scale, 1));color:var(--text-tertiary)}
.fc-answer{width:100%;display:flex;flex-direction:column;gap:12px;font-size:calc(14.5px * var(--fs-scale, 1));line-height:1.95}
.fc-body{margin:0;white-space:pre-line}
.fc-empty{color:var(--text-tertiary)}
.fc-pts{margin:0;padding-inline-start:20px;display:flex;flex-direction:column;gap:6px;color:var(--text-secondary);font-size:calc(13.5px * var(--fs-scale, 1))}
.fc-formula{padding:12px;border-radius:var(--r-md);background:color-mix(in srgb,var(--accent) 6%,transparent);overflow-x:auto;text-align:center}
.fc-vars{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:calc(13px * var(--fs-scale, 1));color:var(--text-secondary)}
.fc-vars li{display:flex;align-items:center;gap:10px}
.fc-sym{min-width:58px;text-align:center;flex-shrink:0}
.fc-link{
  align-self:center;display:inline-flex;align-items:center;gap:6px;background:none;border:0;cursor:pointer;
  color:var(--accent);font-size:calc(12.5px * var(--fs-scale, 1));font-weight:700;padding:6px 10px;border-radius:99px;
}
.fc-link:hover{background:color-mix(in srgb,var(--accent) 10%,transparent)}
.fc-link svg{width:14px;height:14px}

.fc-show{display:flex;justify-content:center}
.fc-grades{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .3s ease,transform .4s cubic-bezier(.22,1,.36,1),visibility 0s linear .4s;
}
.fc-grades.on{opacity:1;visibility:visible;transform:none;transition:opacity .3s ease,transform .4s cubic-bezier(.22,1,.36,1),visibility 0s}
.fc-grade{
  position:relative;padding:12px 8px;border-radius:16px;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:4px;
  background:var(--surface-raised);border:1px solid var(--border-subtle);color:var(--text-primary);
  transition:transform .15s,background .2s,border-color .2s;
}
.fc-grade:hover{transform:translateY(-2px)}
.fc-grade:active{transform:scale(.97)}
.fc-grade-t{font-size:calc(14px * var(--fs-scale, 1));font-weight:900}
.fc-grade-i{font-size:calc(11.5px * var(--fs-scale, 1));color:var(--text-tertiary);font-variant-numeric:tabular-nums}
.fc-grade kbd{position:absolute;top:6px;inset-inline-end:8px;font-size:calc(10.5px * var(--fs-scale, 1));color:var(--text-tertiary);font-family:inherit}
.fc-grade--rose{border-color:color-mix(in srgb,var(--color-rose) 40%,transparent)}
.fc-grade--rose .fc-grade-t{color:var(--color-rose)}
.fc-grade--amber{border-color:color-mix(in srgb,var(--warn-strong) 40%,transparent)}
.fc-grade--amber .fc-grade-t{color:var(--warn-ink)}
.fc-grade--green{border-color:color-mix(in srgb,var(--ok-strong) 40%,transparent)}
.fc-grade--green .fc-grade-t{color:var(--ok-ink)}
.fc-grade--blue{border-color:color-mix(in srgb,var(--accent) 40%,transparent)}
.fc-grade--blue .fc-grade-t{color:var(--accent)}

.fc-done{
  margin:24px auto;max-width:540px;padding:32px 26px;border-radius:24px;text-align:center;
  background:var(--surface-raised);border:1px solid var(--border-subtle);
  display:flex;flex-direction:column;align-items:center;gap:12px;animation:fc-rise .5s cubic-bezier(.22,1,.36,1) both;
}
.fc-done-ic{width:58px;height:58px;border-radius:var(--r-lg);display:grid;place-items:center;background:color-mix(in srgb,var(--ok-strong) 16%,transparent);color:var(--ok-ink)}
.fc-done-ic svg{width:28px;height:28px}
.fc-done h2{margin:0;font-size:calc(20px * var(--fs-scale, 1));font-weight:900}
.fc-done p{margin:0;font-size:calc(13.5px * var(--fs-scale, 1));color:var(--text-secondary);line-height:1.9}
.fc-done-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;width:100%;margin-top:6px}
.fc-done-stats>div{padding:10px;border-radius:var(--r-sm);background:color-mix(in srgb,var(--text-primary) 4%,transparent);display:flex;flex-direction:column;gap:2px}
.fc-done-stats b{font-size:calc(18px * var(--fs-scale, 1));font-weight:900}
.fc-done-stats span{font-size:calc(11.5px * var(--fs-scale, 1));color:var(--text-tertiary)}
.fc-done-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}

.fc-intro-page{max-width:640px;margin-inline:auto}
.fc-intro{margin:24px auto;padding:28px 26px;border-radius:22px;background:var(--surface-raised);border:1px solid var(--border-subtle);display:flex;flex-direction:column;gap:16px}
.fc-intro-kicker{display:inline-flex;align-items:center;gap:6px;font-size:calc(12px * var(--fs-scale,1));font-weight:800;color:var(--accent)}
.fc-intro-kicker svg{width:15px;height:15px}
.fc-intro-title{margin:0;font-size:calc(20px * var(--fs-scale,1));font-weight:900;line-height:1.4}
.fc-intro-desc{margin:0;font-size:calc(13.5px * var(--fs-scale,1));line-height:1.9;color:var(--text-secondary)}
.fc-intro-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.fc-intro-stats>div{padding:12px 8px;border-radius:12px;background:var(--surface-nested);border:1px solid var(--border-subtle);display:flex;flex-direction:column;align-items:center;gap:4px}
.fc-intro-stats b{font-size:calc(20px * var(--fs-scale,1));font-weight:900;color:var(--text-primary)}
.fc-intro-stats span{font-size:calc(11px * var(--fs-scale,1));color:var(--text-tertiary)}
.fc-intro-stages{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.fc-intro-stages li{display:grid;grid-template-columns:1fr;gap:2px;padding:10px 12px;border-radius:10px;background:var(--surface-nested);border:1px solid var(--border-subtle);counter-increment:fcstage}
.fc-intro-stages li b{font-size:calc(13px * var(--fs-scale,1));font-weight:800;color:var(--text-primary);display:flex;align-items:center;gap:8px}
.fc-intro-stages li b::before{content:counter(fcstage,persian);display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent);font-size:11px;font-weight:800;flex-shrink:0}
.fc-intro-stages li span{font-size:calc(11.5px * var(--fs-scale,1));color:var(--text-tertiary);line-height:1.5;padding-inline-start:30px}
.fc-intro-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:4px}
.fc-intro-actions .btn{padding:10px 18px}
@media (max-width:520px){
  .fc-intro{padding:20px 18px}
  .fc-intro-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fc-intro-actions{flex-direction:column-reverse}
  .fc-intro-actions .btn{width:100%;justify-content:center}
}

@keyframes fc-enter{from{opacity:0;transform:translateX(-14px) rotateY(-4deg)}to{opacity:1;transform:none}}
@keyframes fc-enter-flip{from{opacity:0}to{opacity:1}}

@media (max-width:1099px){
  .fc-decks { grid-template-columns: minmax(0, 1fr); }
  .fc-summary { 
    display: grid; 
    grid-template-columns: repeat(2, minmax(0, 1fr)); 
  }
  .fc-start-all { 
    grid-column: 1 / -1; 
    margin-top: 4px;
  }
  .fc-create{grid-template-columns:minmax(0,1fr)}
  .fc-face{padding:20px 18px}
  .fc-card{min-height:260px}
  .fc-stage{min-height:260px}
}
@media (min-width:1600px){
  .fc-page{max-width:1280px}
  .fc-decks{grid-template-columns:repeat(3,minmax(0,1fr))}
  .fc-study{max-width:880px}
  .fc-card,.fc-stage{min-height:340px}
}
@media (max-width:520px){
  .fc-summary{grid-template-columns:repeat(2,minmax(0,1fr))}
  .fc-sum b{font-size:calc(20px * var(--fs-scale, 1))}
  .fc-grades{gap:6px}
  .fc-grade{padding:10px 4px}
  .fc-grade-i{font-size:calc(10.5px * var(--fs-scale, 1))}
}
@media (prefers-reduced-motion:reduce){
  .fc-card,.fc-deck,.fc-sum,.fc-done,.fc-create{animation:none!important}
  .fc-card{transition:none!important}
}