/* ============================================================
   lab.css — Student Code Lab styles
   ============================================================ */

/* ── Top nav ──────────────────────────────────────────────── */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0 0;
  margin-bottom: 2rem;
}

.nav-back {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  text-decoration: none;
  background: rgba(255,255,255,0.10);
  border: 0.5px solid rgba(255,255,255,0.20);
  border-radius: 999px;
  padding: 5px 14px;
  transition: all 0.18s ease;
  white-space: nowrap;
}

.nav-back:hover {
  background: rgba(255,255,255,0.18);
  color: #ffffff;
}
.nav-logo {
  font-size: 13px;
  font-weight: 600;
  color: rgba(255,255,255,0.50);
}

.nav-mode {
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
}

.lab-mode {
  background: rgba(110,207,173,0.15);
  color: #6ecfad;
  border: 0.5px solid rgba(110,207,173,0.35);
}

.nav-provider {
  font-size: 11px;
  color: rgba(255,255,255,0.30);
  background: rgba(255,255,255,0.06);
  border: 0.5px solid rgba(255,255,255,0.10);
  border-radius: 999px;
  padding: 3px 10px;
}


/* ── Page header ──────────────────────────────────────────── */
.page-header {
  text-align: center;
  padding: 0 1rem 2rem;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.page-header h1 span { color: #6ecfad; }

.page-tagline {
  font-size: 14px;
  color: rgba(255,255,255,0.50);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

.header-divider {
  height: 1px;
  background: linear-gradient(to right,
    transparent, rgba(255,255,255,0.08), transparent);
  margin: 0 0 2rem;
}


/* ── Lab layout ───────────────────────────────────────────── */
.lab-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  align-items: start;
}


/* ── Lab cards (left panel) ───────────────────────────────── */
.lab-left { display: flex; flex-direction: column; gap: 12px; }

.lab-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 1.1rem 1.25rem;
  backdrop-filter: blur(12px);
}

.lab-card-title {
  font-size: 12px;
  font-weight: 600;
  color: rgba(255,255,255,0.50);
  margin-bottom: 0.85rem;
  letter-spacing: 0.04em;
}


/* ── Project grid ─────────────────────────────────────────── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.project-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  cursor: pointer;
  transition: all 0.18s ease;
  display: flex;
  align-items: center;
  gap: 7px;
}

.project-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(110,207,173,0.25);
}

.project-item.selected {
  background: rgba(110,207,173,0.12);
  border-color: rgba(110,207,173,0.40);
}

.project-icon { font-size: 15px; }

.project-name {
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.80);
}

.custom-input { margin-top: 10px; }

.custom-input input {
  width: 100%;
  font-size: 13px;
  padding: 0.6rem 0.9rem;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  background: rgba(255,255,255,0.07);
  color: #ffffff;
  outline: none;
  transition: border-color 0.18s ease;
}

.custom-input input:focus  { border-color: #6ecfad; }
.custom-input input::placeholder { color: rgba(255,255,255,0.25); }
.hidden { display: none; }


/* ── Mode list ────────────────────────────────────────────── */
.mode-list { display: flex; flex-direction: column; gap: 8px; }

.mode-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  padding: 0.7rem 0.9rem;
  cursor: pointer;
  transition: all 0.18s ease;
}

.mode-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(110,207,173,0.25);
}

.mode-item.selected {
  background: rgba(110,207,173,0.10);
  border-color: rgba(110,207,173,0.38);
}

.mode-item-icon  { font-size: 18px; flex-shrink: 0; }
.mode-item-title {
  font-size: 13px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 2px;
}
.mode-item-desc  { font-size: 11px; color: rgba(255,255,255,0.40); }


/* ── Code / error textarea ────────────────────────────────── */
#codeInput {
  width: 100%;
  font-size: 12px;
  font-family: "Fira Code", "Consolas", monospace;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 10px;
  background: rgba(0,0,0,0.25);
  color: #e2e8f0;
  outline: none;
  resize: vertical;
  line-height: 1.65;
  transition: border-color 0.18s ease;
}

#codeInput:focus       { border-color: #6ecfad; }
#codeInput::placeholder { color: rgba(255,255,255,0.20); }


/* ── Generate button ──────────────────────────────────────── */
.lab-btn {
  width: 100%;
  font-size: 14px;
  font-weight: 600;
  padding: 0.85rem;
  border-radius: 12px;
  border: none;
  background: #0F6E56;
  color: #fff;
  cursor: pointer;
  transition: background 0.18s ease, transform 0.18s ease, opacity 0.18s ease;
}

.lab-btn:hover:not(:disabled) {
  background: #085041;
  transform: translateY(-1px);
}

.lab-btn:disabled {
  opacity: 0.40;
  cursor: not-allowed;
}


/* ── Right panel: output ──────────────────────────────────── */
.lab-right {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.output-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.30);
}

.copy-btn {
  font-size: 12px;
  font-weight: 500;
  color: #6ecfad;
  background: rgba(110,207,173,0.10);
  border: 0.5px solid rgba(110,207,173,0.30);
  border-radius: 999px;
  padding: 3px 12px;
  cursor: pointer;
  transition: all 0.18s ease;
}

.copy-btn:hover { background: rgba(110,207,173,0.18); }
.copy-btn.hidden { display: none; }


/* ── Output feed ──────────────────────────────────────────── */
.output-feed {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  min-height: 560px;
  max-height: 740px;
  overflow-y: auto;
  padding: 1.5rem;
  scroll-behavior: smooth;
  backdrop-filter: blur(12px);
}

.output-feed::-webkit-scrollbar       { width: 4px; }
.output-feed::-webkit-scrollbar-track { background: transparent; }
.output-feed::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.10);
  border-radius: 99px;
}

.output-empty {
  text-align: center;
  color: rgba(255,255,255,0.18);
  font-size: 14px;
  padding: 5rem 2rem;
  line-height: 2;
}


/* ── Output blocks ────────────────────────────────────────── */
.output-block {
  margin-bottom: 1.5rem;
  animation: fadeSlideIn 0.22s ease both;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.output-block-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  padding: 0 2px;
}

.label-structure { color: #a89ef5; }
.label-code      { color: #6ecfad; }
.label-explain   { color: #f5a07a; }
.label-error     { color: #f5a0a0; }
.label-fix       { color: #6ecfad; }
.label-review    { color: #7ab8f5; }
.label-step      { color: #fad07a; }

.output-text {
  font-size: 14px;
  color: rgba(255,255,255,0.85);
  line-height: 1.75;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}

.output-text p            { margin-bottom: 0.5rem; }
.output-text p:last-child { margin-bottom: 0; }

.output-code {
  font-size: 12.5px;
  font-family: "Fira Code", "Consolas", monospace;
  color: #e2e8f0;
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  line-height: 1.7;
  white-space: pre;
}

.output-typing {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.30);
  font-size: 13px;
  padding: 1rem 0;
}

.output-typing-dots {
  display: flex;
  gap: 4px;
}

.output-typing-dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #6ecfad;
  animation: typingBounce 1.3s infinite ease-in-out;
}

.output-typing-dots span:nth-child(2) { animation-delay: 0.18s; }
.output-typing-dots span:nth-child(3) { animation-delay: 0.36s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: translateY(0);    opacity: 0.35; }
  40%           { transform: translateY(-4px); opacity: 1;    }
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(250,208,122,0.18);
  color: #fad07a;
  font-size: 11px;
  font-weight: 700;
  margin-right: 6px;
  flex-shrink: 0;
}


/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 800px) {
  .lab-layout {
    grid-template-columns: 1fr;
  }
  .output-feed { min-height: 400px; }
}

@media (max-width: 500px) {
  .project-grid { grid-template-columns: 1fr 1fr; }
  .page-header h1 { font-size: 26px; }
}

/* ── Prompt refiner ───────────────────────────────────────── */
.refiner-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(110,207,173,0.20);
  border-radius: 16px;
  padding: 1.1rem 1.25rem;
  backdrop-filter: blur(12px);
}

.refiner-title {
  font-size: 13px;
  font-weight: 600;
  color: #6ecfad;
  margin-bottom: 4px;
}

.refiner-sub {
  font-size: 12px;
  color: rgba(255,255,255,0.40);
  margin-bottom: 0.75rem;
  line-height: 1.55;
}

.refiner-card textarea {
  width: 100%;
  font-size: 13px;
  padding: 0.65rem 0.9rem;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  color: #ffffff;
  outline: none;
  resize: vertical;
  line-height: 1.6;
  font-family: inherit;
  transition: border-color 0.18s ease;
  margin-bottom: 0.65rem;
}

.refiner-card textarea:focus {
  border-color: #6ecfad;
}

.refiner-card textarea::placeholder {
  color: rgba(255,255,255,0.22);
}

.refine-btn {
  width: 100%;
  font-size: 13px;
  font-weight: 600;
  padding: 0.65rem;
  border-radius: 10px;
  border: 1px solid rgba(110,207,173,0.40);
  background: rgba(110,207,173,0.12);
  color: #6ecfad;
  cursor: pointer;
  transition: all 0.18s ease;
}

.refine-btn:hover:not(:disabled) {
  background: rgba(110,207,173,0.22);
  transform: translateY(-1px);
}

.refine-btn:disabled {
  opacity: 0.40;
  cursor: not-allowed;
}

.refined-box {
  margin-top: 0.85rem;
  background: rgba(110,207,173,0.06);
  border: 1px solid rgba(110,207,173,0.25);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  animation: fadeSlideIn 0.22s ease both;
}

.refined-box.hidden { display: none; }

.refined-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6ecfad;
  margin-bottom: 0.5rem;
}

.refined-text {
  font-size: 13px;
  color: rgba(255,255,255,0.85);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.refined-actions {
  display: flex;
  gap: 8px;
}

.use-btn {
  font-size: 12px;
  font-weight: 600;
  padding: 5px 16px;
  border-radius: 999px;
  border: none;
  background: #0F6E56;
  color: #fff;
  cursor: pointer;
  transition: background 0.18s ease;
}

.use-btn:hover { background: #085041; }

.discard-btn {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 999px;
  border: 0.5px solid rgba(255,255,255,0.15);
  background: transparent;
  color: rgba(255,255,255,0.40);
  cursor: pointer;
  transition: all 0.18s ease;
}

.discard-btn:hover {
  color: #ffffff;
  border-color: rgba(255,255,255,0.30);
}

.clear-btn {
  font-size: 12px;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 999px;
  border: 0.5px solid rgba(110,207,173,0.25);
  background: transparent;
  color: #6ecfad;
  cursor: pointer;
  transition: all 0.18s ease;
  margin-left: auto;
}

.clear-btn:hover {
  background: rgba(110,207,173,0.10);
  border-color: rgba(110,207,173,0.45);
}