/* ============================================================
   MathCalc Pro — Calculator Component Styles
   ============================================================ */

/* ── Calculator Card ── */
.calc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition);
  margin-bottom: 28px;
}
.calc-card:hover { box-shadow: var(--shadow-md); }
.calc-card-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.calc-card-header-left { display: flex; align-items: center; gap: 12px; }
.calc-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
}
.calc-icon.accent { background: linear-gradient(135deg, var(--accent-dark), var(--accent)); }
.calc-icon.success { background: linear-gradient(135deg, #00897b, #00c853); }
.calc-icon.warning { background: linear-gradient(135deg, #f57c00, #ffab00); }
.calc-icon.purple  { background: linear-gradient(135deg, #6a1b9a, #ab47bc); }
.calc-icon.teal    { background: linear-gradient(135deg, #00695c, #26a69a); }
.calc-icon.red     { background: linear-gradient(135deg, #c62828, #ef5350); }
.calc-title h3 { font-size: 1rem; margin-bottom: 2px; }
.calc-title p  { font-size: 0.78rem; color: var(--text-muted); }
.calc-card-actions { display: flex; gap: 6px; align-items: center; }

.calc-card-body { padding: 24px; }
.calc-card-body .form-group:last-of-type { margin-bottom: 0; }

/* ── Mode Selector ── */
.mode-selector {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.mode-btn {
  padding: 6px 14px;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-main);
}
.mode-btn.active, .mode-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ── Input Group ── */
.input-group {
  display: flex;
  align-items: stretch;
  gap: 0;
}
.input-group .form-input {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
  border-right: none;
}
.input-group .input-addon {
  padding: 10px 14px;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex; align-items: center;
  white-space: nowrap;
}
.input-group .btn {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* ── Matrix Input Grid ── */
.matrix-grid {
  display: inline-grid;
  gap: 6px;
  margin: 10px 0;
}
.matrix-grid input {
  width: 64px;
  padding: 8px;
  text-align: center;
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition);
}
.matrix-grid input:focus { border-color: var(--border-focus); }
.matrix-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
  padding: 4px;
}
.matrix-bracket {
  font-size: 3rem;
  line-height: 1;
  color: var(--primary);
  font-weight: 300;
  display: flex; align-items: center;
}

/* ── Chart Container ── */
.chart-container {
  position: relative;
  margin-top: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
}
.chart-container canvas { max-height: 280px; }

/* ── History Table ── */
.history-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.history-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--bg-secondary);
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}
.history-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  vertical-align: middle;
}
.history-table tr:last-child td { border-bottom: none; }
.history-table tr:hover td { background: var(--bg-secondary); }
.history-table .mono { font-family: var(--font-mono); font-size: 0.82rem; }
.history-table .tag-cell .badge { font-size: 0.65rem; }

/* ── Equation Display ── */
.equation-display {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--primary);
  margin: 12px 0;
  word-break: break-all;
}
[data-theme="dark"] .equation-display { color: var(--accent-light); }

/* ── Number Display ── */
.number-display {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: -0.02em;
}
[data-theme="dark"] .number-display { color: var(--accent-light); }

/* ── Calc Grid (multiple results) ── */
.calc-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.calc-result-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
}
.calc-result-item .cri-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.calc-result-item .cri-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--primary);
}
[data-theme="dark"] .cri-value { color: var(--accent-light); }

/* ── Variable row for simultaneous eqs ── */
.variable-row {
  display: grid;
  grid-template-columns: 60px 1fr 20px 1fr 20px 1fr 20px 1fr 20px 1fr;
  gap: 6px;
  align-items: center;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-muted);
}
.variable-row input { grid-column: span 1; }
.variable-row .var-label { text-align: center; }

/* ── Sequence Display ── */
.sequence-display {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px;
}
.seq-term {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
}
.seq-term.highlight {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ── Trig Circle ── */
.trig-circle-wrap {
  display: flex; justify-content: center;
  margin: 16px 0;
}
.trig-circle-wrap svg { max-width: 220px; }

/* ── Probability Display ── */
.prob-bar {
  height: 12px;
  background: var(--bg-secondary);
  border-radius: 999px;
  overflow: hidden;
  margin: 8px 0;
}
.prob-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 999px;
  transition: width 0.6s cubic-bezier(0.4,0,0.2,1);
}

/* ── Pricing Cards ── */
.pricing-card {
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 30px;
  transition: all var(--transition);
  position: relative;
}
.pricing-card.popular {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0,188,212,0.12), var(--shadow-lg);
  transform: scale(1.03);
}
.pricing-card .popular-badge {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  color: white;
  padding: 4px 18px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.pricing-card .price-amount {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin: 16px 0 4px;
}
.pricing-card .price-amount sup { font-size: 1.2rem; font-weight: 600; vertical-align: top; margin-top: 12px; display: inline-block; }
.pricing-card .price-period { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 24px; }
.pricing-card .price-features { margin: 24px 0; }
.pricing-card .price-feature {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}
.pricing-card .price-feature:last-child { border-bottom: none; }
.pricing-card .price-feature .feat-icon { font-size: 0.9rem; flex-shrink: 0; }
.pricing-card .price-feature.included .feat-icon { color: var(--success); }
.pricing-card .price-feature.excluded { opacity: 0.45; }
.pricing-card .price-feature.excluded .feat-icon { color: var(--text-muted); }

/* ── Dashboard Stats ── */
.dash-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-bottom: 28px; }
.dash-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex; gap: 14px; align-items: center;
}
.dash-stat .ds-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--bg-secondary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.dash-stat .ds-info .ds-num  { font-size: 1.5rem; font-weight: 800; color: var(--text-primary); line-height: 1; }
.dash-stat .ds-info .ds-label{ font-size: 0.75rem; color: var(--text-muted); margin-top: 3px; }

/* ── Auth Pages ── */
.auth-page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
}
.auth-visual {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), #1565c0);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 60px 40px;
  position: relative; overflow: hidden;
}
.auth-visual::before {
  content: '';
  position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M40 40c0-11.046-8.954-20-20-20S0 28.954 0 40s8.954 20 20 20 20-8.954 20-20zm20 0c0 11.046 8.954 20 20 20s20-8.954 20-20-8.954-20-20-20-20 8.954-20 20z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.auth-visual-content { position: relative; z-index: 1; text-align: center; color: white; }
.auth-visual-content h2 { font-size: 2.2rem; margin-bottom: 14px; }
.auth-visual-content p  { opacity: 0.75; max-width: 320px; line-height: 1.7; }
.auth-visual-content .math-symbols {
  font-size: 3rem;
  letter-spacing: 0.3em;
  opacity: 0.4;
  margin-bottom: 28px;
  font-family: var(--font-mono);
  animation: float 4s ease-in-out infinite;
}
.auth-form-side {
  display: flex; align-items: center; justify-content: center;
  padding: 40px;
  background: var(--bg);
}
.auth-form-wrap {
  width: 100%;
  max-width: 400px;
}
.auth-form-wrap h1 { font-size: 1.8rem; margin-bottom: 6px; }
.auth-form-wrap > p { margin-bottom: 28px; }
.auth-divider {
  display: flex; align-items: center; gap: 12px;
  margin: 20px 0;
  color: var(--text-muted); font-size: 0.82rem;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
.social-btn {
  width: 100%;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 11px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  font-family: var(--font-main);
  transition: all var(--transition);
  margin-bottom: 10px;
}
.social-btn:hover { border-color: var(--primary); background: var(--bg-secondary); }
.social-btn img { width: 18px; height: 18px; }

@media (max-width: 768px) {
  .auth-page { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .dash-stats { grid-template-columns: repeat(2,1fr); }
  .pricing-card.popular { transform: none; }
}
@media (max-width: 480px) {
  .dash-stats { grid-template-columns: 1fr; }
  .calc-card-header { flex-direction: column; align-items: flex-start; }
  .variable-row { grid-template-columns: 1fr 1fr; font-size: 0.78rem; }
}