/* alg7-fx.css — UX-эффекты для Алгебры 7 (все главы)
   shake + pulse + combo badge + visual constructors styles */

/* === ANIMATIONS === */
@keyframes alg7-shake {
  0%,100% { transform: translateX(0); }
  10%,30%,50%,70%,90% { transform: translateX(-6px); }
  20%,40%,60%,80% { transform: translateX(6px); }
}
@keyframes alg7-pulse {
  0% { box-shadow: 0 0 0 0 rgba(16,185,129,.55); }
  50% { box-shadow: 0 0 0 12px rgba(16,185,129,0); }
  100% { box-shadow: 0 0 0 0 rgba(16,185,129,0); }
}
@keyframes alg7-glow {
  0% { filter: drop-shadow(0 0 0 transparent); }
  50% { filter: drop-shadow(0 0 12px var(--sec-acc, #10b981)); }
  100% { filter: drop-shadow(0 0 0 transparent); }
}
@keyframes alg7-combo-pop {
  0% { transform: scale(.4) translateY(20px); opacity: 0; }
  40% { transform: scale(1.18) translateY(0); opacity: 1; }
  60% { transform: scale(1) translateY(0); }
  90% { transform: scale(1) translateY(0); opacity: 1; }
  100% { transform: scale(.85) translateY(-30px); opacity: 0; }
}
@keyframes alg7-sparkle {
  0%,100% { opacity: 0; transform: scale(0); }
  50% { opacity: 1; transform: scale(1); }
}
@keyframes alg7-area-in {
  from { opacity: 0; transform: scale(.5); transform-origin: 0 0; }
  to { opacity: 1; transform: scale(1); }
}
@keyframes alg7-slide-out {
  0% { transform: translate(0,0); }
  100% { transform: translate(var(--alg7-dx, 100px), var(--alg7-dy, 0)); }
}

/* === STATE CLASSES === */
.alg7-shake { animation: alg7-shake .52s cubic-bezier(.36,.07,.19,.97) both; }
.alg7-pulse { animation: alg7-pulse .85s ease-out; }
.alg7-glow { animation: alg7-glow 1.1s ease-out; }

/* === COMBO BADGE === */
.alg7-combo-badge {
  position: fixed;
  z-index: 9998;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: linear-gradient(135deg, #f59e0b, #ef4444, #f59e0b);
  background-size: 200% 100%;
  color: #fff;
  border-radius: 999px;
  font-family: 'Unbounded', 'Inter', sans-serif;
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: .02em;
  box-shadow: 0 8px 28px rgba(239,68,68,.4), 0 0 0 3px rgba(255,255,255,.2) inset;
  animation: alg7-combo-pop 2.2s ease-out forwards, alg7-combo-shimmer 1.4s linear infinite;
}
@keyframes alg7-combo-shimmer {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
.alg7-combo-badge .ic-fire {
  width: 22px; height: 22px;
  filter: drop-shadow(0 0 4px rgba(255,255,255,.8));
}
.alg7-combo-badge .badge-x {
  font-size: 1.4rem;
  font-weight: 900;
  font-family: 'JetBrains Mono', monospace;
}

/* === STREAK INDICATOR (постоянный, в углу) === */
.alg7-streak {
  position: fixed;
  bottom: 18px;
  right: 18px;
  z-index: 9990;
  display: none;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  border-radius: 999px;
  font-family: 'Unbounded', 'Inter', sans-serif;
  font-weight: 800;
  font-size: .82rem;
  box-shadow: 0 6px 20px rgba(239,68,68,.35);
  transition: transform .2s, opacity .3s;
  animation: alg7-streak-pulse 1.6s ease-in-out infinite;
}
.alg7-streak.show { display: inline-flex; }
.alg7-streak .ic-fire { width: 16px; height: 16px; }
@keyframes alg7-streak-pulse {
  0%,100% { box-shadow: 0 6px 20px rgba(239,68,68,.35); }
  50% { box-shadow: 0 6px 28px rgba(239,68,68,.7); }
}

/* === SPARKLES при правильном ответе === */
.alg7-sparkle {
  position: absolute;
  width: 8px; height: 8px;
  background: radial-gradient(circle, #fbbf24 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: alg7-sparkle .9s ease-out forwards;
}

/* === ВИЗУАЛИЗАТОР КВАДРАТА СУММЫ — Ch2 §12 === */
.alg7-qsum-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: linear-gradient(135deg, rgba(220,38,38,.05), rgba(245,158,11,.05));
  border-radius: 12px;
  margin-top: 12px;
}
.alg7-qsum-svg {
  width: 100%;
  max-width: 380px;
  height: auto;
}
.alg7-qsum-svg .area-aa { fill: #dc2626; opacity: .82; transition: opacity .3s; }
.alg7-qsum-svg .area-ab { fill: #f59e0b; opacity: .82; transition: opacity .3s; }
.alg7-qsum-svg .area-bb { fill: #10b981; opacity: .82; transition: opacity .3s; }
.alg7-qsum-svg .area-aa.dim,
.alg7-qsum-svg .area-ab.dim,
.alg7-qsum-svg .area-bb.dim { opacity: .15; }
.alg7-qsum-svg .area-label {
  font-family: 'Unbounded','JetBrains Mono', monospace;
  font-weight: 800;
  font-size: 13px;
  fill: #fff;
  text-anchor: middle;
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
  pointer-events: none;
}
.alg7-qsum-formula {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  text-align: center;
  line-height: 2;
  padding: 10px 14px;
  background: var(--card);
  border-radius: 10px;
  border: 1px solid var(--border);
  width: 100%;
}
.alg7-qsum-formula .term-aa { color: #dc2626; font-weight: 800; }
.alg7-qsum-formula .term-ab { color: #d97706; font-weight: 800; }
.alg7-qsum-formula .term-bb { color: #047857; font-weight: 800; }
.alg7-qsum-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.alg7-qsum-controls label {
  font-size: .88rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.alg7-qsum-controls input[type="range"] {
  width: 140px;
  accent-color: var(--sec-acc, #d97706);
}
.alg7-qsum-controls b {
  display: inline-block;
  min-width: 28px;
  padding: 2px 8px;
  background: var(--sec-acc-soft, #fef3c7);
  color: var(--sec-acc-d, #b45309);
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  text-align: center;
}
.alg7-qsum-mode {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}
.alg7-qsum-mode button {
  padding: 5px 12px;
  border-radius: 8px;
  background: var(--card);
  border: 1.5px solid var(--border);
  font-size: .82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all .15s;
}
.alg7-qsum-mode button.active {
  background: var(--sec-acc, #d97706);
  color: #fff;
  border-color: var(--sec-acc, #d97706);
}

/* === ВИЗУАЛИЗАТОР РАЗНОСТИ КВАДРАТОВ — Ch2 §13 === */
.alg7-dsq-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 14px;
  background: linear-gradient(135deg, rgba(234,88,12,.05), rgba(245,158,11,.05));
  border-radius: 12px;
  margin-top: 12px;
}
.alg7-dsq-svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}
.alg7-dsq-svg .big-square { fill: #ea580c; opacity: .75; transition: opacity .4s; }
.alg7-dsq-svg .small-square { fill: #06b6d4; opacity: .85; }
.alg7-dsq-svg .l-shape {
  fill: #ea580c;
  opacity: .75;
  transition: transform .9s cubic-bezier(.4,1.4,.4,1), opacity .4s;
  transform-origin: center;
}
.alg7-dsq-svg .rect-piece {
  fill: #ea580c;
  opacity: .85;
  transition: transform .9s cubic-bezier(.4,1.4,.4,1);
}
.alg7-dsq-svg .label {
  font-family: 'Unbounded', monospace;
  font-weight: 800;
  font-size: 12px;
  fill: #fff;
  text-anchor: middle;
  text-shadow: 0 1px 2px rgba(0,0,0,.5);
  pointer-events: none;
}
.alg7-dsq-svg .label.dark { fill: #1e293b; text-shadow: none; }
.alg7-dsq-svg .ghost-rect {
  fill: none;
  stroke: #94a3b8;
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
  opacity: 0;
  transition: opacity .4s;
}
.alg7-dsq-svg.stage-2 .ghost-rect { opacity: 1; }
.alg7-dsq-formula {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  text-align: center;
  line-height: 1.8;
  padding: 10px 14px;
  background: var(--card);
  border-radius: 10px;
  border: 1px solid var(--border);
  width: 100%;
}
.alg7-dsq-step-btn {
  padding: 10px 22px;
  background: linear-gradient(135deg, #ea580c, #f59e0b);
  color: #fff;
  border-radius: 12px;
  font-weight: 700;
  font-size: .92rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(234,88,12,.3);
  transition: transform .15s, box-shadow .15s;
}
.alg7-dsq-step-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px rgba(234,88,12,.5);
}
.alg7-dsq-step-btn:disabled {
  opacity: .55;
  cursor: not-allowed;
}