/* ─── Side-menu additions ─────────────────────────────────── */

/* Content area for pushed sub-panel views */
.side-menu__content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Enabled root-menu button (STUDY, future PLAN) */
.side-menu__btn--enabled {
  color: rgba(255, 255, 255, 0.85);
  cursor: pointer;
}

.side-menu__btn--enabled:hover {
  background: rgba(43, 58, 171, 0.3);
  color: var(--gold);
}

/* ─── Sub-panel shared layout ─────────────────────────────── */

.study-panel {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* Back button at the top of each sub-panel */
.panel-back-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  padding: 10px 18px;
  background: none;
  border: none;
  border-bottom: 1px solid var(--blue-border);
  color: var(--gold);
  font-family: 'B612 Mono', ui-monospace, monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}

.panel-back-btn:hover {
  background: rgba(43, 58, 171, 0.25);
}

/* Group of section buttons inside a sub-panel */
.panel-btn-group {
  display: flex;
  flex-direction: column;
  padding: 6px 0;
  border-bottom: 1px solid var(--blue-border);
}

/* Individual section button (e.g. BOLDFACE, FLASHCARDS) */
.panel-section-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 18px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.85);
  font-family: 'B612 Mono', ui-monospace, monospace;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.panel-section-btn:hover:not(.panel-section-btn--disabled) {
  background: rgba(43, 58, 171, 0.3);
  color: var(--gold);
}

.panel-section-btn--disabled {
  color: rgba(255, 255, 255, 0.3);
  cursor: not-allowed;
}

/* ─── Flashcard overlay ───────────────────────────────────── */

.fc-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2500;
  background: rgba(0, 0, 0, 0.65);
  align-items: center;
  justify-content: center;
}

.fc-overlay--active {
  display: flex;
}

/* Card */
.fc-card {
  width: 520px;
  max-width: calc(100vw - 40px);
  background: rgba(14, 22, 52, 0.97);
  border: 1px solid var(--blue-border);
  border-radius: 6px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-family: 'B612 Mono', ui-monospace, monospace;
  overflow: hidden;
}

/* Header row */
.fc-header {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--blue-border);
  gap: 10px;
}

.fc-title {
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--gold);
  flex: 1;
}

.fc-progress {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.4);
  white-space: nowrap;
}

.fc-close {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.4);
  font-size: 14px;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 3px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.fc-close:hover {
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.08);
}

/* Body */
.fc-body {
  padding: 24px 24px 20px;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fc-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.35);
}

.fc-label--response {
  margin-top: 20px;
}

.fc-condition {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.4;
}

.fc-response-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fc-steps {
  margin: 0;
  padding-left: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fc-steps li {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
  line-height: 1.4;
}

/* Footer */
.fc-footer {
  padding: 16px 24px 20px;
  border-top: 1px solid var(--blue-border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fc-btn {
  font-family: 'B612 Mono', ui-monospace, monospace;
  letter-spacing: 0.1em;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

/* CHECK button — full width, prominent */
.fc-btn--check {
  width: 100%;
  padding: 12px 0;
  font-size: 13px;
  background: var(--blue-border);
  border: 1px solid rgba(43, 58, 171, 0.8);
  color: rgba(255, 255, 255, 0.95);
}

.fc-btn--check:hover {
  background: rgba(43, 58, 171, 0.8);
}

/* Nav row: PREV + NEXT side by side */
.fc-nav-row {
  display: flex;
  gap: 10px;
}

/* PREV / NEXT buttons */
.fc-btn--nav {
  flex: 1;
  padding: 10px 0;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.75);
}

.fc-btn--nav:hover:not(:disabled) {
  background: rgba(43, 58, 171, 0.3);
  border-color: var(--blue-border);
  color: var(--gold);
}

.fc-btn--nav:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ─── README panel ────────────────────────────────────────── */

.readme-panel {
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.readme-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 18px;
  font-family: 'B612 Mono', ui-monospace, monospace;
  font-size: 11px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.8);
}

.readme-body h2 {
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--gold);
  margin: 18px 0 6px;
  padding-top: 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.readme-body h2:first-child {
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

.readme-body h3 {
  font-size: 11px;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.65);
  margin: 12px 0 4px;
}

.readme-body p {
  margin: 0 0 8px;
}

.readme-body ul,
.readme-body ol {
  margin: 0 0 8px;
  padding-left: 18px;
}

.readme-body li {
  margin-bottom: 4px;
}

.readme-body code {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  padding: 1px 4px;
  font-family: 'B612 Mono', ui-monospace, monospace;
  font-size: 10px;
  color: var(--gold);
}

.readme-body strong {
  color: rgba(255, 255, 255, 0.95);
  font-weight: 700;
}

.readme-body em {
  font-style: italic;
  color: rgba(255, 255, 255, 0.65);
}

.readme-footer {
  margin-top: 24px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.25);
  text-align: center;
}

/* ─── Practice overlay ────────────────────────────────────── */

/* Buzz animation for wrong answers */
@keyframes fc-buzz {
  0%,  100% { transform: translateX(0); }
  15%        { transform: translateX(-7px); }
  30%        { transform: translateX(7px); }
  45%        { transform: translateX(-5px); }
  60%        { transform: translateX(5px); }
  75%        { transform: translateX(-2px); }
  90%        { transform: translateX(2px); }
}

.fc-buzz {
  animation: fc-buzz 0.45s ease;
}

/* Shared practice input */
.fc-practice-input {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 3px;
  color: rgba(255, 255, 255, 0.95);
  font-family: 'B612 Mono', ui-monospace, monospace;
  font-size: 13px;
  letter-spacing: 0.04em;
  padding: 5px 8px;
  flex: 1;
  min-width: 60px;
  outline: none;
  transition: border-color 0.15s;
}

.fc-practice-input:focus {
  border-color: rgba(43, 58, 171, 0.8);
}

.fc-practice-input--hinted {
  color: var(--gold);
  border-color: rgba(245, 168, 0, 0.35);
}

/* Smaller input for ops limits fields */
.fc-practice-input--sm {
  min-width: 80px;
  max-width: 160px;
}

/* Boldface practice step rows */
.fc-practice-steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}

.fc-practice-step {
  display: flex;
  align-items: center;
  gap: 8px;
}

.fc-step-num {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  min-width: 20px;
  flex-shrink: 0;
}

/* Three-button practice nav row: PREV | HINT | NEXT */
.fc-nav-row--practice {
  display: flex;
  gap: 8px;
}

.fc-nav-row--practice .fc-btn--nav {
  flex: 1;
}

/* HINT button */
.fc-btn--hint {
  padding: 10px 14px;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.5);
  flex-shrink: 0;
}

.fc-btn--hint:hover {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.8);
}

/* Completion row: DONE | REPEAT */
.fc-complete-row {
  display: flex;
  gap: 10px;
}

.fc-btn--done {
  flex: 1;
  padding: 10px 0;
  font-size: 12px;
  background: rgba(245, 168, 0, 0.12);
  border: 1px solid rgba(245, 168, 0, 0.4);
  color: var(--gold);
}

.fc-btn--done:hover {
  background: rgba(245, 168, 0, 0.22);
}

.fc-btn--repeat {
  flex: 1;
  padding: 10px 0;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.75);
}

.fc-btn--repeat:hover {
  background: rgba(43, 58, 171, 0.3);
  border-color: var(--blue-border);
  color: var(--gold);
}

/* ─── Ops Limits practice lines ───────────────────────────── */

.fc-pr-ol-lines {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.fc-pr-ol-line {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.fc-pr-ol-prompt {
  font-size: 12px;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.6);
}

.fc-pr-ol-fields {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-left: 6px;
}

.fc-pr-ol-field {
  display: flex;
  align-items: center;
  gap: 6px;
}

.fc-pr-ol-unit {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.45);
  white-space: nowrap;
}

/* ─── Ops Limits card lines ───────────────────────────────── */

.fc-ol-lines {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 4px;
}

.fc-ol-line {
  font-size: 13px;
  letter-spacing: 0.03em;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.75);
}

.fc-ol-blank {
  color: rgba(255, 255, 255, 0.2);
}

.fc-ol-answer {
  color: var(--gold);
  font-weight: 700;
}