/* Control module — phase 4 UX (requires control-ui.css) */

.kd-breadcrumb-bar {
  margin-bottom: 14px;
}

.kd-back-link {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.kd-back-link:hover {
  color: var(--text);
  text-decoration: underline;
}

.kd-format-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.kd-format-nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.kd-format-nav-link:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--ks-primary) 32%, var(--line));
}

.kd-format-nav-link.is-active {
  color: var(--text);
  border-color: color-mix(in srgb, var(--ks-success) 42%, var(--line));
  background: color-mix(in srgb, var(--ks-success) 10%, var(--card));
}

.kd-variant-format-label {
  display: block;
  margin-bottom: 2px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.kd-variant-section {
  margin-top: 18px;
}

.kd-variant-section h2 {
  margin: 0 0 6px;
  font-family: var(--ks-font-serif);
  font-size: 22px;
}

.kd-variant-section > p,
.kd-format-section-note {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.kd-select-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.kd-variant-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

.kd-variant-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  min-height: 120px;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 94%, transparent);
  box-shadow: var(--shadow2);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.kd-variant-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--btn);
}

.kd-variant-card {
  position: relative;
  padding-left: 22px;
}

.kd-variant-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--ks-primary) 32%, var(--line));
}

.kd-variant-card.is-active {
  border-color: color-mix(in srgb, var(--ks-success) 40%, var(--line));
  background: color-mix(in srgb, var(--ks-success) 8%, var(--card));
}

.kd-variant-card.is-loading {
  opacity: 0.85;
  cursor: wait;
}

.kd-variant-card:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.kd-variant-card strong {
  font-size: 17px;
  line-height: 1.3;
  color: var(--text);
}

.kd-variant-card small {
  color: var(--muted);
  line-height: 1.5;
  font-size: 13px;
}

.kd-variant-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.kd-variant-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  font-size: 11px;
  font-weight: 800;
  color: var(--text);
}

.kd-variant-badge.time {
  border-color: color-mix(in srgb, var(--warning) 36%, var(--line));
  color: color-mix(in srgb, var(--warning) 88%, var(--text));
}

.kd-variant-badge.score {
  border-color: color-mix(in srgb, var(--ks-primary) 30%, var(--line));
}

.kd-variant-badge.grade {
  border-color: color-mix(in srgb, var(--ks-accent) 30%, var(--line));
}

.kd-variant-badge.format-oge {
  border-color: color-mix(in srgb, var(--ks-russian) 36%, var(--line));
  color: color-mix(in srgb, var(--ks-russian) 88%, var(--text));
}

.kd-variant-badge.format-ege {
  border-color: color-mix(in srgb, var(--ks-primary) 36%, var(--line));
  color: color-mix(in srgb, var(--ks-primary) 88%, var(--text));
}

.kd-variant-badge.summary {
  border-color: color-mix(in srgb, var(--ks-accent) 30%, var(--line));
}

.kd-timer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 82%, transparent);
}

.kd-timer-bar.is-warning {
  border-color: color-mix(in srgb, var(--warning) 48%, var(--line));
  background: color-mix(in srgb, var(--warning) 12%, var(--card));
  animation: kd-timer-pulse 1.2s ease-in-out infinite;
}

@keyframes kd-timer-pulse {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--warning) 22%, transparent); }
}

.kd-timer-bar-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.kd-timer-bar-value {
  font-size: 28px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  line-height: 1;
}

.kd-timer-bar.is-warning .kd-timer-bar-value {
  color: color-mix(in srgb, var(--warning) 90%, var(--text));
}

.kd-task-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.kd-task-pill {
  min-width: 40px;
  min-height: 36px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 92%, transparent);
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.kd-task-pill:hover {
  border-color: color-mix(in srgb, var(--ks-primary) 30%, var(--line));
  color: var(--text);
}

.kd-task-pill.is-active {
  border-color: color-mix(in srgb, var(--ks-primary) 40%, var(--line));
  background: color-mix(in srgb, var(--ks-primary-soft) 78%, var(--card));
  color: var(--text);
}

.kd-task-pill.is-answered {
  border-color: color-mix(in srgb, var(--ok) 34%, var(--line));
}

.kd-success-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: color-mix(in srgb, var(--ks-bg) 30%, rgba(0, 0, 0, 0.62));
  backdrop-filter: blur(10px);
}

.kd-success-card {
  width: min(480px, 100%);
  padding: 28px 24px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 96%, transparent);
  box-shadow: var(--shadow);
  text-align: center;
}

.kd-success-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 900;
  color: var(--ok);
  background: color-mix(in srgb, var(--ok) 14%, var(--card));
  border: 1px solid color-mix(in srgb, var(--ok) 36%, var(--line));
}

.kd-success-card h2 {
  margin: 0 0 8px;
  font-family: var(--ks-font-serif);
  font-size: 24px;
}

.kd-success-card p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.55;
}

.kd-success-meta {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  text-align: left;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--card2) 80%, transparent);
  font-size: 14px;
}

.kd-success-meta dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.kd-success-meta dd {
  margin: 0 0 8px;
  color: var(--text);
  font-weight: 700;
}

.kd-success-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (max-width: 620px) {
  .kd-variant-grid {
    grid-template-columns: 1fr;
  }

  .kd-timer-bar-value {
    font-size: 24px;
  }
}