/* Premium dark theme for SQL practice landing page */
:root {
  --bg: #0b1018;
  --bg-2: #070c13;
  --panel: #0f1522;
  --panel-2: #0b1220;
  --muted: #95a2b3;
  --accent: #7c5cff;
  --accent-2: #27d3c2;
  --text: #e6eef6;
  --border: rgba(255, 255, 255, 0.06);
  --glow: rgba(124, 92, 255, 0.25);
  --success: #10b981;
  --warning: #f59e0b;

  /* Brand specific colors */
  --sql-blue: #3178c6;
  --python-yellow: #ffd43b;
  --python-blue: #3776ab;
  --spark-orange: #e25a1c;

  /* Gradients */
  --grad-sql: linear-gradient(135deg, #3178c6, #1e4d8c);
  --grad-python: linear-gradient(135deg, #3776ab, #ffd43b);
  --grad-spark: linear-gradient(135deg, #e25a1c, #b34311);
  --grad-accent: linear-gradient(135deg, var(--accent), #4d3cff);
}

* {
  box-sizing: border-box
}

html,
body {
  height: 100%;
  margin: 0
}

body {
  font-family: 'Outfit', Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  background: radial-gradient(1200px 600px at 10% 0%, #111a2a 0%, transparent 55%),
    radial-gradient(800px 500px at 90% 0%, #0f1b33 0%, transparent 60%),
    linear-gradient(180deg, var(--bg), var(--bg-2) 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

.ambient {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(600px 200px at 20% 20%, rgba(124, 92, 255, 0.15), transparent 60%),
    radial-gradient(500px 220px at 85% 10%, rgba(39, 211, 194, 0.12), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Navigation */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 56px;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent), #4d3cff);
  box-shadow: 0 0 12px var(--glow);
}

.nav {
  display: flex;
  gap: 28px
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text)
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.02)
}

/* Main Stack */
.stack {
  display: flex;
  flex-direction: column;
  gap: 48px
}

/* Hero Section */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 20px;
}

.hero-content {
  padding: 20px 0
}

.eyebrow {
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #7f93b1;
  font-size: 11px;
  margin: 0 0 12px
}

.hero-title {
  margin: 0 0 16px;
  font-size: 52px;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.typing-text {
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  border-right: 3px solid var(--accent);
  padding-right: 4px;
  animation: blink 0.7s infinite;
}

@keyframes blink {
  50% {
    border-color: transparent
  }
}

.hero-subtitle {
  color: var(--muted);
  margin: 0 0 24px;
  font-size: 18px;
  line-height: 1.6;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.btn-primary {
  background: linear-gradient(180deg, var(--accent), #4d3cff);
  color: white;
  padding: 12px 24px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 8px 20px rgba(124, 92, 255, 0.3);
  transition: all 0.2s;
}

.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 28px rgba(124, 92, 255, 0.4);
  filter: brightness(1.1);
}

.btn-primary:active {
  transform: translateY(0)
}

.btn-primary:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  box-shadow: none;
  transform: none;
  filter: grayscale(0.2);
}

.btn-primary.btn-lg {
  padding: 14px 28px;
  font-size: 15px
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 24px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.03)
}

.btn-ghost.btn-lg {
  padding: 14px 28px;
  font-size: 15px
}

.hero-stats-row {
  display: flex;
  gap: 20px;
  flex-direction: column;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateX(10px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}

.stat-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  font-weight: 800;
  font-size: 16px;
  position: relative;
}

.stat-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 14px;
  padding: 2px;
  background: var(--grad-accent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.5;
}

.pulse-sql {
  background: rgba(49, 120, 198, 0.15);
  color: #3178c6;
}

.pulse-python {
  background: rgba(55, 118, 171, 0.15);
  color: #3776ab;
}

.pulse-spark {
  background: rgba(226, 90, 28, 0.15);
  color: #e25a1c;
}

.stat-label {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}

/* How It Works */
.how-it-works {
  text-align: center;
  padding: 28px 0;
}

.how-it-works h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.how-it-works p {
  color: var(--muted);
  margin: 0
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 32px;
}

.step-card {
  padding: 24px 18px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(180deg, var(--accent), #4d3cff);
  color: white;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-card h3 {
  margin: 0 0 8px;
  font-size: 16px
}

.step-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5
}

/* Practice by Language Section */
.practice-section {
  text-align: center;
  padding: 20px 0
}

.practice-section h2 {
  margin: 0 0 8px;
  font-size: 28px
}

.language-practice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.language-practice-card {
  padding: 32px 24px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.3s;
  position: relative;
  overflow: visible;
}

.language-practice-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.language-practice-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-accent);
  opacity: 0.6;
}

.language-practice-card:nth-child(1):hover {
  border-color: var(--sql-blue);
}

.language-practice-card:nth-child(1)::before {
  background: var(--grad-sql);
}

.language-practice-card:nth-child(2):hover {
  border-color: var(--python-yellow);
}

.language-practice-card:nth-child(2)::before {
  background: var(--grad-python);
}

.language-practice-card:nth-child(3):hover {
  border-color: var(--spark-orange);
}

.language-practice-card:nth-child(3)::before {
  background: var(--grad-spark);
}

.language-header {
  margin-bottom: 16px;
}

.language-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 12px;
}

.language-practice-card h3 {
  margin: 0 0 8px;
  font-size: 24px;
  color: var(--text);
}

.language-desc {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 20px;
}

.difficulty-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.language-practice-card:hover .difficulty-options {
  opacity: 1;
  max-height: 200px;
}

.difficulty-option {
  padding: 12px 16px;
  background: rgba(124, 92, 255, 0.1);
  border: 1px solid rgba(124, 92, 255, 0.3);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.difficulty-option:hover {
  background: rgba(124, 92, 255, 0.2);
  border-color: var(--accent);
  transform: translateX(4px);
}

.difficulty-option.easy {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.1);
}

.difficulty-option.easy:hover {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.2);
}

.difficulty-option.medium {
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.1);
}

.difficulty-option.medium:hover {
  border-color: var(--warning);
  background: rgba(245, 158, 11, 0.2);
}

.difficulty-option.hard {
  border-color: rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.1);
}

.difficulty-option.hard:hover {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.2);
}

.option-level {
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}

.option-count {
  color: var(--muted);
  font-size: 12px;
}

/* Old Difficulty Section (keeping for backward compatibility) */
.difficulty-section {
  text-align: center;
  padding: 20px 0
}

.difficulty-section h2 {
  margin: 0 0 8px;
  font-size: 28px
}

.section-subtitle {
  color: var(--muted);
  margin: 0;
  font-size: 15px
}

.difficulty-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 28px;
}

.difficulty-card {
  padding: 28px 24px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.3s;
}

.difficulty-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
  transform: translateY(-4px);
}

.difficulty-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.difficulty-card.easy .difficulty-badge {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
}

.difficulty-card.medium .difficulty-badge {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
}

.difficulty-card.hard .difficulty-badge {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
}

.difficulty-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600
}

.difficulty-card p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5
}

.count-badge {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 16px;
}

.btn-card {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-card:hover {
  border-color: var(--accent);
  background: rgba(124, 92, 255, 0.1);
}

/* Topics Section */
.topics-section {
  text-align: center;
  padding: 20px 0
}

.topics-section h2 {
  margin: 0 0 8px;
  font-size: 28px
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.topic-card {
  padding: 20px 14px;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.2s;
  cursor: pointer;
}

.topic-card:hover {
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.015));
}

.topic-icon {
  font-size: 24px;
  display: block;
  margin-bottom: 8px
}

.topic-card h4 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 600
}

.topic-desc {
  margin: 0;
  font-size: 11px;
  color: var(--muted)
}

/* Features Section */
.features-section {
  text-align: center;
  padding: 20px 0
}

.features-section h2 {
  margin: 0 0 28px;
  font-size: 28px
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.feature-box {
  padding: 24px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  text-align: center;
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
  display: block;
}

.feature-box h4 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600
}

.feature-box p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5
}

/* CTA Section */
.cta-section {
  text-align: center;
  padding: 48px 28px;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(124, 92, 255, 0.08), rgba(39, 211, 194, 0.04));
  border: 1px solid rgba(124, 92, 255, 0.2);
}

.cta-section h2 {
  margin: 0 0 8px;
  font-size: 28px
}

.cta-section p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 15px
}

/* Footer */
.footer {
  margin-top: 40px;
  text-align: center;
  padding: 24px 0;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width:1024px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0;
  }

  .hero-stats-row {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr)
  }

  .difficulty-grid {
    grid-template-columns: 1fr
  }

  .topics-grid {
    grid-template-columns: repeat(3, 1fr)
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr)
  }
}

@media (max-width:768px) {
  .topbar {
    flex-wrap: wrap;
    margin-bottom: 36px
  }

  .nav {
    display: none
  }

  .page {
    padding: 16px
  }

  .stack {
    gap: 32px
  }

  .hero-title {
    font-size: 32px
  }

  .hero-subtitle {
    font-size: 15px
  }

  .hero-stats-row {
    flex-direction: column;
    width: 100%;
    max-width: 400px;
    gap: 12px;
  }

  .stat-card {
    justify-content: center;
    padding: 16px;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 14px
  }

  .step-card {
    padding: 18px 14px
  }

  .difficulty-grid {
    gap: 14px
  }

  .topics-grid {
    grid-template-columns: repeat(2, 1fr)
  }

  .features-grid {
    grid-template-columns: 1fr
  }

  .cta-section {
    padding: 32px 20px
  }
}

/* ========================================
   SQL PRACTICE PAGE STYLES
======================================== */

.page-header {
  text-align: center;
  padding: 40px 0 20px;
}

.page-header h1 {
  font-size: 36px;
  margin: 0 0 12px;
}

.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 30px;
}

.filter-group {
  display: flex;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.filter-btn:hover {
  background: rgba(124, 92, 255, 0.1);
  color: var(--text);
  border-color: var(--accent);
}

.filter-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.search-box input {
  padding: 10px 16px;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  min-width: 250px;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.questions-section {
  margin-bottom: 40px;
}

.questions-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.question-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.3s;
}

.question-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.2);
}

.question-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.question-title {
  font-size: 18px;
  margin: 0;
  color: var(--text);
}

.question-desc {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 16px;
  line-height: 1.6;
}

.question-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(124, 92, 255, 0.15);
  color: var(--accent);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
}

/* ========================================
   SOLVE PAGE STYLES
======================================== */

.solve-container {
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto minmax(400px, 2fr);
  gap: 0;
  margin-top: 10px;
  height: calc(100vh - 100px);
}

.panel-resizer {
  width: 4px;
  background: var(--border);
  cursor: col-resize;
  user-select: none;
  transition: background-color 0.2s;
}

.panel-resizer:hover {
  background: var(--accent);
  opacity: 0.8;
}

.panel-resizer.active {
  background: var(--accent);
  opacity: 1;
}

.problem-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  overflow-y: auto;
}

.problem-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.problem-header h2 {
  margin: 0;
  font-size: 22px;
}

.problem-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.problem-section h3 {
  font-size: 16px;
  margin: 0 0 12px;
  color: var(--accent);
}

.problem-section p {
  color: var(--muted);
  line-height: 1.6;
  margin: 0;
}

.problem-section code {
  background: var(--bg-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-2);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 13px;
}

.schema-box {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.schema-table h4 {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--accent-2);
}

.schema-details {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.schema-details th {
  text-align: left;
  padding: 8px;
  background: var(--panel-2);
  color: var(--muted);
  font-weight: 500;
}

.schema-details {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}

.schema-details th {
  text-align: left;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

.schema-details td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.schema-details tr:last-child td {
  border-bottom: none;
}

.sample-data {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
}

.sample-data table,
.expected-output table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}

.sample-data th,
.expected-output th {
  text-align: left;
  padding: 12px;
  background: var(--panel-2);
  color: var(--accent-2);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}

.sample-data td,
.expected-output td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.expected-output {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
}

.expected-output table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.expected-output th {
  text-align: left;
  padding: 8px;
  background: var(--panel-2);
  color: var(--muted);
  font-weight: 500;
  border-bottom: 2px solid var(--border);
}

.expected-output td {
  padding: 8px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.expected-output td i {
  color: var(--muted);
  font-style: italic;
}

.problem-panel {
  margin-right: 8px;
}

.editor-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-left: 8px;
}

.editor-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 4px;
}

.engine-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.engine-selector label {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}

.engine-dropdown {
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.engine-dropdown:hover {
  border-color: var(--accent);
}

.engine-dropdown:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(124, 92, 255, 0.2);
}

.editor-actions {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.btn-sm {
  padding: 10px 14px;
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.sql-editor {
  width: 100%;
  flex: 1;
  min-height: 250px;
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.6;
  resize: vertical;
  box-sizing: border-box;
}

.sql-editor:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

/* CodeMirror 5 styling */
.CodeMirror {
  background: var(--bg-2) !important;
  color: var(--text) !important;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-family: 'Monaco', 'Courier New', monospace !important;
  font-size: 14px !important;
  line-height: 1.6 !important;
  min-height: 250px;
}

.CodeMirror-scroll {
  padding: 16px !important;
}

.CodeMirror-gutters {
  background: var(--panel-2);
  border-right: 1px solid var(--border);
}

.CodeMirror-linenumber {
  color: var(--muted);
}

.CodeMirror-cursor {
  border-left: 2px solid var(--accent) !important;
}

.CodeMirror-selected {
  background: rgba(124, 92, 255, 0.2) !important;
}

.cm-comment {
  color: #9aa0a6 !important;
  font-style: italic !important;
}

.cm-string {
  color: var(--accent-2) !important;
}

.cm-keyword {
  color: var(--accent) !important;
}

/* CodeMirror overrides */
.CodeMirror {
  background: var(--bg-2) !important;
  color: var(--text) !important;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-family: 'Monaco', 'Courier New', monospace !important;
  font-size: 14px !important;
  line-height: 1.6 !important;
  min-height: 300px;
}

.CodeMirror-scroll {
  padding: 16px !important;
}

.CodeMirror-gutters {
  background: var(--panel-2);
  border-right: 1px solid var(--border);
}

.CodeMirror-linenumber {
  color: var(--muted);
}

.CodeMirror-cursor {
  border-left: 2px solid var(--accent) !important;
}

.CodeMirror-selected {
  background: rgba(124, 92, 255, 0.2) !important;
}

.cm-comment {
  color: #9aa0a6 !important;
  font-style: italic !important;
}

.cm-string {
  color: var(--accent-2) !important;
}

.cm-keyword {
  color: var(--accent) !important;
}

.cm-variable {
  color: var(--text) !important;
}

.CodeMirror-focused {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--glow) !important;
  outline: none !important;
}

.result-area {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  overflow: auto;
}

.result-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
  text-align: center;
}

.result-message {
  padding: 16px;
  border-radius: 8px;
  font-size: 14px;
}

.result-message.info {
  background: rgba(39, 211, 194, 0.1);
  color: var(--accent-2);
  border: 1px solid rgba(39, 211, 194, 0.3);
}

.result-message.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.result-message.error {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.result-message.warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.result-table-container {
  overflow: auto;
}

.result-header {
  padding: 12px 0;
  color: var(--success);
  font-weight: 500;
  font-size: 14px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.result-warning {
  padding: 12px;
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 13px;
}

.result-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}

.result-table th {
  text-align: left;
  padding: 14px 12px;
  background: var(--panel-2);
  color: var(--accent);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.result-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}

.result-table tr:hover td {
  background: rgba(124, 92, 255, 0.05);
}

.result-table td i {
  color: var(--muted);
  font-style: italic;
}

/* Hint and Success Boxes */
.hint-box {
  padding: 16px;
  background: rgba(39, 211, 194, 0.1);
  border: 1px solid rgba(39, 211, 194, 0.3);
  border-radius: 8px;
  margin-bottom: 16px;
}

.hint-header {
  color: var(--accent-2);
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

.hint-text {
  color: var(--text);
  margin: 0;
  line-height: 1.6;
  font-size: 14px;
}

.success-box {
  padding: 24px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(16, 185, 129, 0.05) 100%);
  border: 1px solid rgba(16, 185, 129, 0.4);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(16, 185, 129, 0.1);
}

.success-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

.success-left {
  flex: 1;
  text-align: left;
}

.success-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-end;
  min-width: 200px;
}

.success-header {
  color: var(--success);
  font-weight: 700;
  font-size: 20px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.success-message {
  color: var(--text);
  margin: 0;
  line-height: 1.7;
  font-size: 15px;
}

.success-box #next-question-btn {
  padding: 12px 20px;
  font-size: 13px;
  white-space: nowrap;
}

.end-message {
  color: var(--success);
  font-weight: 600;
  font-size: 16px;
  text-align: center;
}

.failure-container {
  padding: 16px;
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
}

.test-case-label {
  color: var(--error);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(239, 68, 68, 0.2);
}

.error-message {
  color: var(--error);
  padding: 12px;
  background: rgba(239, 68, 68, 0.1);
  border-radius: 6px;
  margin-bottom: 12px;
  font-size: 13px;
  border-left: 3px solid var(--error);
}

.test-results {
  margin-bottom: 12px;
}

.editor-footer {
  display: flex;
  gap: 10px;
  padding: 12px 0;
}

.syntax-error-container {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.syntax-error-header {
  background: rgba(239, 68, 68, 0.15);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  font-weight: 600;
  color: #ef4444;
}

.syntax-error-container .error-message {
  padding: 16px 20px;
  color: var(--text);
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.engine-badge {
  display: inline-block;
  background: var(--accent);
  color: var(--bg);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
}

/* Responsive for solve page */
@media (max-width: 1024px) {
  .solve-container {
    grid-template-columns: 1fr;
    height: auto;
  }

  .problem-panel {
    max-height: 400px;
  }
}


/* Responsive adjustments */
@media (max-width: 1024px) {
  .solve-container {
    grid-template-columns: 1fr;
    height: auto;
  }

  .problem-panel {
    max-height: 400px;
  }
}

@media (max-width: 768px) {
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-group {
    flex-wrap: wrap;
  }

  .search-box input {
    min-width: 100%;
  }
}

/* Light sweep animation for Next Question button */
@keyframes light-sweep {
  0% {
    background-position: -200% center;
  }

  100% {
    background-position: 200% center;
  }
}

#next-question-btn.blimp-effect {
  background: linear-gradient(90deg,
      var(--border) 0%,
      rgba(16, 185, 129, 0.3) 25%,
      rgba(16, 185, 129, 0.6) 50%,
      rgba(16, 185, 129, 0.3) 75%,
      var(--border) 100%);
  background-size: 200% 100%;
  animation: light-sweep 3s ease-in-out infinite;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

/* User Menu & Dropdown */
.user-menu {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none !important;
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  background: rgba(15, 21, 34, 0.95);
  backdrop-filter: blur(12px);
  min-width: 200px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  z-index: 10000;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 8px;
  transform: translateY(10px);
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
  pointer-events: none;
}

.dropdown-content.show {
  display: block !important;
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.dropdown-content a {
  color: var(--muted);
  padding: 10px 14px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  border-radius: 8px;
  transition: all 0.2s;
}

.dropdown-content a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-2);
  padding-left: 18px;
}

.dropdown-content a.logout-link:hover {
  color: #ff4d4d;
  background: rgba(255, 77, 77, 0.05);
}

/* ========================================
   PROFILE PAGE STYLES
======================================== */

.profile-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 20px;
}

.profile-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px;
  backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.identity-card {
  display: flex;
  align-items: center;
  gap: 40px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.05), rgba(39, 211, 194, 0.05));
}

.avatar-container {
  position: relative;
  width: 120px;
  height: 120px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.avatar-container:hover {
  transform: scale(1.05);
}

.avatar-img {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: var(--bg-2);
  border: 2px solid var(--border);
  z-index: 1;
  object-fit: cover;
}

.avatar-edit-hint {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.6);
  color: white;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 0;
  text-align: center;
  border-bottom-left-radius: 60px;
  border-bottom-right-radius: 60px;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 2;
}

.avatar-container:hover .avatar-edit-hint {
  opacity: 1;
}

.avatar-glow {
  position: absolute;
  inset: -10px;
  background: var(--grad-accent);
  filter: blur(20px);
  opacity: 0.3;
  border-radius: 50%;
}


.identity-info {
  flex: 1;
}

.badge-row {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.rank-badge {
  padding: 4px 12px;
  background: var(--grad-accent);
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.level-badge {
  padding: 4px 12px;
  border: 1px solid var(--accent-2);
  color: var(--accent-2);
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
}

.identity-info h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 700;
}

.identity-info p {
  color: var(--muted);
  margin: 4px 0 20px;
}

.xp-container {
  max-width: 400px;
}

.xp-info {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
}

.xp-bar-bg {
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
}

.xp-bar-fill {
  height: 100%;
  background: var(--grad-accent);
  box-shadow: 0 0 10px var(--glow);
  transition: width 1s ease-out;
}

.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 24px;
}

.stats-summary {
  display: flex;
  flex-direction: column;
}

.profile-card h3 {
  margin: 0 0 24px;
  font-size: 18px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

.radar-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}

.skill-bar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.skill-track {
  height: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden;
}

.skill-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 1s ease-out;
}

.skill-bar.sql .skill-fill {
  background: var(--sql-blue);
  box-shadow: 0 0 8px rgba(49, 120, 200, 0.4);
}

.skill-bar.python .skill-fill {
  background: var(--python-yellow);
  box-shadow: 0 0 8px rgba(255, 212, 59, 0.4);
}

.skill-bar.spark .skill-fill {
  background: var(--spark-orange);
  box-shadow: 0 0 8px rgba(226, 90, 28, 0.4);
}

.quick-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.qstat {
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
}

.qval {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-2);
}

.qlab {
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.achievements-gallery {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.track-badges {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.track-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.badge-row-items {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 12px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s;
  cursor: help;
  position: relative;
}

.badge-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.badge-icon {
  font-size: 28px;
}

.badge-tier {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--muted);
}

.badge-item.locked {
  filter: grayscale(1);
  opacity: 0.3;
}

.badge-item.unlocked {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.1), transparent);
  transform: translateZ(0);
  animation: badge-unlock 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.badge-item.unlocked::after {
  content: '✓';
  position: absolute;
  top: -5px;
  right: -5px;
  background: var(--success);
  color: white;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Gold Glow for Unlocked Master Badges */
.badge-item.unlocked[id$="-hard"] {
  border-color: #ffd700 !important;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), transparent);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
  animation: golden-pulse 2s infinite ease-in-out;
}

@keyframes golden-pulse {
  0% {
    transform: translateY(0) scale(1);
  }

  50% {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 0 30px rgba(255, 215, 0, 0.4);
  }

  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes badge-unlock {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }

  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Modal Styles */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 20000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.avatar-modal-content {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  width: 100%;
  max-width: 500px;
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  animation: modal-slide-up 0.3s ease-out;
}

@keyframes modal-slide-up {
  from {
    transform: translateY(20px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-header h2 {
  margin: 0;
  font-size: 20px;
  color: white;
}

.close-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 28px;
  cursor: pointer;
  padding: 0;
}

.avatar-presets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.avatar-preset {
  aspect-ratio: 1;
  border: 2px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
}

.avatar-preset:hover {
  border-color: var(--accent);
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(124, 92, 255, 0.3);
}

.avatar-preset img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-custom p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}

.input-group {
  display: flex;
  gap: 12px;
}

.input-group input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  color: white;
  outline: none;
}

.save-btn {
  background: var(--grad-accent);
  border: none;
  border-radius: 8px;
  padding: 8px 20px;
  color: white;
  font-weight: 600;
  cursor: pointer;
}


.activity-heatmap {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 10px;
}

.day-dot {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.05);
}

.day-dot.active-1 {
  background: rgba(124, 92, 255, 0.2);
}

.day-dot.active-2 {
  background: rgba(124, 92, 255, 0.4);
}

.day-dot.active-3 {
  background: rgba(124, 92, 255, 0.6);
}

.day-dot.active-4 {
  background: var(--accent);
  box-shadow: 0 0 10px var(--glow);
}

.loading-overlay {
  padding: 120px 0;
  text-align: center;
}

.loader {
  width: 48px;
  height: 48px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-bottom-color: var(--accent);
  border-radius: 50%;
  display: inline-block;
  animation: rotation 1s linear infinite;
  margin-bottom: 16px;
}

@keyframes rotation {
  0% {
    transform: rotate(0deg)
  }

  100% {
    transform: rotate(360deg)
  }
}

@media (max-width: 850px) {
  .identity-card {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }

  .badge-row {
    justify-content: center;
  }

  .xp-container {
    margin: 0 auto;
  }

  .profile-grid {
    grid-template-columns: 1fr;
  }
}

/* Solved Question Highlighting */
.question-card.solved {
  border-color: rgba(16, 185, 129, 0.5) !important;
  background: linear-gradient(145deg, rgba(16, 185, 129, 0.03), rgba(0, 0, 0, 0.2)) !important;
  box-shadow:
    0 0 20px rgba(16, 185, 129, 0.08),
    inset 0 0 15px rgba(16, 185, 129, 0.05) !important;
  position: relative;
}

.question-card.solved .question-title::after {
  content: '✓';
  margin-left: 10px;
  color: var(--success);
  font-size: 1.1em;
  text-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}

.question-card.solved:hover {
  border-color: var(--success) !important;
  box-shadow: 0 0 30px rgba(16, 185, 129, 0.25) !important;
  transform: translateY(-4px) scale(1.01);
}