/* style.css – Python Test Room Developer Theme (Light, 2D, Python Blue & Yellow) */
:root {
  --bg: #f8faff;
  --panel: #ffffff;
  --text: #1e293b;
  --accent-blue: #3776AB;
  --accent-yellow: #FFD43B;
  --dim: #cbd5e1;
  --error: #dc2626;
  --success: #16a34a;
  --hint-bg: #f1f5f9;
  --border-glow: 0 2px 8px rgba(55, 118, 171, 0.12);
  --yellow-glow: 0 2px 8px rgba(255, 212, 59, 0.2);
  --card-border: #e2e8f0;
  --code-bg: #f1f5f9;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #eef2f6;
  font-family: 'Courier New', Courier, 'Lucida Sans Typewriter', monospace;
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow-x: hidden;
}

/* Subtle scanline removed — kept for structure but hidden */
.scanline {
  display: none;
}

.terminal {
  max-width: 1100px;
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.05), 0 0 0 1px rgba(55, 118, 171, 0.1);
  position: relative;
  z-index: 1;
  backdrop-filter: blur(0);
}

/* Python header — clean 2D */
.python-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 8px;
}
.python-icon {
  font-size: 2.6rem;
  color: var(--accent-yellow);
  text-shadow: 0 2px 4px rgba(55, 118, 171, 0.1);
  transition: transform 0.2s;
}
.python-icon:hover {
  transform: translateY(-2px);
}

.typewriter {
  overflow: hidden;
  border-right: 3px solid var(--accent-yellow);
  white-space: nowrap;
  margin: 0 auto;
  letter-spacing: 2px;
  animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
  width: fit-content;
  max-width: 100%;
  color: var(--accent-blue);
  font-weight: 700;
}
@keyframes typing {
  from { width: 0; }
  to { width: 100%; }
}
@keyframes blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--accent-yellow); }
}

h1, h2 {
  color: var(--accent-blue);
  font-weight: 600;
  letter-spacing: 1px;
  border-bottom: 2px solid var(--accent-yellow);
  padding-bottom: 8px;
  margin-bottom: 20px;
  display: inline-block;
}

.sub {
  color: #475569;
  font-size: 0.95rem;
  text-align: center;
  font-weight: 500;
}
.flicker {
  animation: flicker 4s infinite;
}
@keyframes flicker {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; color: var(--accent-blue); }
}

/* Panels */
.panel {
  display: none;
  animation: fade 0.2s ease;
}
.panel.active {
  display: block;
}
@keyframes fade {
  from { opacity: 0.4; }
  to { opacity: 1; }
}

/* Room grid — 2D cards */
.room-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 18px;
  margin: 28px 0;
}
.room-card {
  background: white;
  border: 1.5px solid var(--card-border);
  border-radius: 16px;
  padding: 22px 10px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}
.room-card:hover {
  border-color: var(--accent-yellow);
  box-shadow: 0 8px 16px -8px rgba(55, 118, 171, 0.2), 0 0 0 2px rgba(255, 212, 59, 0.2);
  transform: translateY(-3px);
}
.room-card.completed {
  border-color: var(--success);
  background: #f0fdf4;
}
.room-card h3 {
  color: var(--accent-blue);
  font-size: 1.5rem;
  margin-bottom: 8px;
  font-weight: 700;
}
.room-card .difficulty {
  color: #64748b;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.progress-badge {
  margin-top: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #334155;
  background: #f1f5f9;
  display: inline-block;
  padding: 4px 12px;
  border-radius: 30px;
}
.stats {
  margin-top: 24px;
  padding: 16px 20px;
  background: #f8fafc;
  border-left: 6px solid var(--accent-blue);
  border-radius: 12px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.02);
  font-weight: 500;
  color: #0f172a;
}

/* Challenge panel */
.room-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.code-card {
  background: #ffffff;
  border: 1px solid var(--dim);
  border-radius: 18px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
}
.code-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
}
.badge {
  background: var(--accent-yellow);
  padding: 6px 16px;
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #1e293b;
  border: 1px solid rgba(0,0,0,0.05);
}
.difficulty-tag {
  color: var(--accent-blue);
  text-transform: uppercase;
  font-weight: 700;
  font-size: 0.8rem;
  border-bottom: 2px dotted var(--accent-yellow);
  padding-bottom: 2px;
}
.code-snippet {
  background: var(--code-bg);
  padding: 20px;
  border-radius: 14px;
  color: #0b1e33;
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.2rem;
  font-weight: 500;
  white-space: pre-wrap;
  word-break: break-word;
  border-left: 8px solid var(--accent-yellow);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

/* Hint area — 2D clean */
.hint-area {
  background: var(--hint-bg);
  border-radius: 14px;
  padding: 16px;
  margin: 24px 0;
  border: 1px solid var(--accent-yellow);
  border-left-width: 6px;
}
.hint-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  color: var(--accent-blue);
  font-weight: 700;
}
.wordlist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  max-height: 120px;
  overflow-y: auto;
  padding: 6px 0;
  font-size: 0.95rem;
}
.wordlist span {
  background: white;
  padding: 4px 14px;
  border-radius: 30px;
  border: 1px solid var(--accent-blue);
  color: var(--accent-blue);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}

/* Input area */
.input-area {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin: 28px 0 16px;
}
.input-area label {
  color: var(--accent-blue);
  font-size: 1.3rem;
  font-weight: 700;
}
.input-area input {
  flex: 2 1 220px;
  background: white;
  border: 2px solid var(--dim);
  color: var(--text);
  padding: 14px 18px;
  font-family: inherit;
  font-size: 1rem;
  border-radius: 50px;
  outline: none;
  transition: 0.15s;
}
.input-area input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(55, 118, 171, 0.15);
}
button {
  background: transparent;
  border: 2px solid var(--accent-blue);
  color: var(--accent-blue);
  padding: 12px 24px;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 60px;
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: white;
}
button.primary-btn {
  background: var(--accent-blue);
  color: white;
  border: 2px solid var(--accent-blue);
  box-shadow: 0 4px 8px rgba(55, 118, 171, 0.2);
}
button.primary-btn:hover:not(:disabled) {
  background: var(--accent-yellow);
  border-color: var(--accent-yellow);
  color: #1e293b;
  box-shadow: 0 6px 12px rgba(255, 212, 59, 0.3);
}
button:hover:not(:disabled) {
  background: var(--accent-yellow);
  border-color: var(--accent-yellow);
  color: #0f172a;
  box-shadow: 0 4px 10px rgba(55, 118, 171, 0.15);
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  border-color: #94a3b8;
  color: #64748b;
}
.ghost-btn {
  border: 2px dashed var(--accent-blue);
  padding: 8px 18px;
  font-size: 0.85rem;
  background: #f8faff;
}
.message {
  min-height: 2.5em;
  margin: 12px 0;
  color: var(--error);
  font-weight: 700;
  padding-left: 8px;
}
.message.success {
  color: var(--success);
}
.action-bar {
  display: flex;
  gap: 16px;
  margin-top: 20px;
}

/* Summary panel */
#summaryScore {
  font-size: 2.2rem;
  color: var(--accent-blue);
  margin: 20px 0 10px;
  font-weight: 800;
  text-shadow: 0 2px 4px rgba(255, 212, 59, 0.3);
}
#answerKey {
  background: #f8fafc;
  padding: 20px;
  border-radius: 18px;
  margin: 24px 0;
  max-height: 420px;
  overflow-y: auto;
  border-left: 8px solid var(--accent-yellow);
  border: 1px solid var(--dim);
}
.answer-row {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid #e2e8f0;
  flex-wrap: wrap;
  font-size: 0.95rem;
}
.answer-row strong {
  color: var(--accent-blue);
}

/* Footer */
footer {
  margin-top: 36px;
  border-top: 2px solid var(--accent-yellow);
  padding-top: 20px;
  color: #334155;
  font-size: 0.95rem;
}
.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.social-links a {
  color: var(--accent-blue);
  margin-left: 20px;
  font-size: 1.6rem;
  transition: 0.2s;
  background: #f1f5f9;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--dim);
}
.social-links a:hover {
  color: #1e293b;
  background: var(--accent-yellow);
  border-color: var(--accent-yellow);
  transform: scale(1.05);
}
.cursor-blink {
  margin-top: 14px;
  text-align: right;
  font-weight: 600;
  color: var(--accent-blue);
}
.type-cursor {
  animation: blink 1s infinite;
  color: var(--accent-yellow);
  font-weight: bold;
}
@keyframes blink { 50% { opacity: 0; } }

/* Responsive */
@media (max-width: 600px) {
  .terminal { padding: 18px 12px; }
  .room-header { flex-direction: column; align-items: start; }
  .input-area { flex-direction: column; align-items: stretch; }
  .action-bar { flex-direction: column; }
  .footer-content { flex-direction: column; text-align: center; }
  .python-header { gap: 8px; }
  .python-icon { font-size: 2rem; }
  .social-links a { margin: 0 8px; }
}