:root {
  --bg: #0a0e1a;
  --surface: #111827;
  --surface-light: #1a2238;
  --accent: #00d4ff;
  --accent-dim: rgba(0, 212, 255, 0.15);
  --accent-glow: rgba(0, 212, 255, 0.4);
  --green: #00e68a;
  --green-dim: rgba(0, 230, 138, 0.15);
  --orange: #ff9f43;
  --red: #ff4757;
  --text: #e8edf5;
  --text-dim: #7a8ba8;
  --border: rgba(255,255,255,0.15);
}

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  min-height: 100vh;
}

button, [role="button"], a, select {
  cursor: pointer;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* NAV */
.qf-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 14, 26, 0.9);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.qf-nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.qf-nav-logo-icon {
  font-size: 24px;
}

.qf-nav-logo-text {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
}

.qf-nav-logo-text span {
  color: var(--accent);
}

.qf-nav-links {
  display: flex;
  gap: 28px;
  font-size: 13px;
  color: var(--text-dim);
}

.qf-nav-links a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.qf-nav-links a:hover {
  color: var(--text);
}

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

.btn-secondary {
  padding: 9px 20px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 13px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.05);
}

.btn-primary {
  padding: 9px 20px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: var(--bg);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  transition: all 0.2s;
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-primary-lg {
  padding: 16px 36px;
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--accent), #0077cc);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 4px 24px var(--accent-glow);
  transition: transform 0.2s;
  text-decoration: none;
}

.btn-primary-lg:hover {
  transform: translateY(-2px);
}

.btn-outline-lg {
  padding: 16px 28px;
  border-radius: 12px;
  border: 2px solid var(--accent);
  background: rgba(0, 212, 255, 0.08);
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-outline-lg:hover {
  background: rgba(0, 212, 255, 0.15);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

/* HERO */
.qf-hero {
  position: relative;
  padding: 80px 32px 60px;
  overflow: hidden;
  max-width: 1200px;
  margin: 0 auto;
}

.qf-hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.qf-hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.qf-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--green-dim);
  color: var(--green);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 24px;
}

.pulsing-dot {
  position: relative;
  display: inline-block;
  width: 8px;
  height: 8px;
}

.pulsing-dot::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2s ease-in-out infinite;
}

.pulsing-dot::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--green);
  opacity: 0.3;
  animation: pulse 2s ease-in-out infinite;
}

.qf-hero h1 {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
  animation: fadeUp 0.8s ease;
}

.gradient-text {
  background: linear-gradient(90deg, var(--accent), #0088ff, var(--accent));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

.qf-hero p {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.qf-hero-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* STATS */
.qf-stats {
  display: flex;
  gap: 16px;
  padding: 0 32px 48px;
  max-width: 1200px;
  margin: 0 auto;
  flex-wrap: wrap;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  flex: 1;
  min-width: 160px;
}

.stat-card-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}

.stat-card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
}

.stat-card-sub {
  font-size: 12px;
  color: var(--green);
  margin-top: 4px;
}

/* LIVE PANEL */
.qf-live-panel {
  margin: 0 32px 48px;
  max-width: 1136px;
  margin-left: auto;
  margin-right: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

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

.qf-live-panel-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.qf-live-panel-title span:first-child {
  font-size: 16px;
}

.qf-live-panel-title span:nth-child(2) {
  font-weight: 600;
  font-size: 14px;
}

.sample-badge {
  font-size: 10px;
  padding: 2px 10px;
  border-radius: 10px;
  background: var(--green-dim);
  color: var(--green);
  font-family: monospace;
}

.qf-live-panel-content {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
}

.qf-convergence {
  flex: 1;
  min-width: 300px;
  padding: 24px;
  border-right: 1px solid var(--border);
}

.qf-convergence-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.qf-convergence-sub {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 12px;
}

.qf-convergence-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  font-size: 11px;
  color: var(--text-dim);
  font-family: monospace;
}

.qf-convergence-stats span span {
  color: var(--accent);
}

.qf-results {
  flex: 1;
  min-width: 300px;
  padding: 24px;
}

.qf-results-label {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.allocation-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.allocation-ticker {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 600;
  width: 52px;
}

.allocation-bar-bg {
  flex: 1;
  height: 8px;
  background: rgba(255,255,255,0.05);
  border-radius: 4px;
  overflow: hidden;
}

.allocation-bar {
  height: 100%;
  border-radius: 4px;
  transition: width 1s ease;
}

.allocation-weight {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-dim);
  width: 44px;
  text-align: right;
}

.sharpe-comparison {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--green-dim);
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sharpe-comparison-label {
  font-size: 12px;
  color: var(--text-dim);
}

.sharpe-comparison-values {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
}

.sharpe-comparison-values .old {
  color: var(--text-dim);
}

.sharpe-comparison-values .arrow {
  color: var(--text-dim);
  margin: 0 8px;
}

.sharpe-comparison-values .new {
  color: var(--green);
}

.sharpe-comparison-values .diff {
  color: var(--green);
  font-size: 11px;
  margin-left: 6px;
}

/* CAPABILITIES */
.qf-capabilities {
  padding: 0 32px 64px;
  max-width: 1200px;
  margin: 0 auto;
}

.qf-capabilities-header {
  text-align: center;
  margin-bottom: 40px;
}

.qf-capabilities-header h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.qf-capabilities-header p {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 500px;
  margin: 0 auto;
}

.qf-capabilities-grid {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.capability-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  flex: 1;
  min-width: 220px;
  transition: all 0.3s ease;
}

.capability-card:hover {
  background: var(--surface-light);
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-dim);
}

.capability-card-icon {
  font-size: 32px;
  margin-bottom: 14px;
}

.capability-card-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.capability-card-desc {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 16px;
}

.capability-card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.capability-tag {
  font-size: 10px;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--accent-dim);
  color: var(--accent);
  font-family: monospace;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* CTA */
.qf-cta {
  padding: 64px 32px;
  text-align: center;
  border-top: 1px solid var(--border);
}

.qf-cta h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.qf-cta p {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 28px;
}

.qf-cta-disclaimer {
  margin-top: 48px;
  color: var(--text-dim);
  font-size: 12px;
}

/* AUTH PAGES */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 30px;
}

.auth-logo-icon {
  font-size: 48px;
}

.auth-logo h2 {
  color: var(--text);
  margin-top: 10px;
  font-size: 24px;
}

.auth-logo h2 span {
  color: var(--accent);
}

.free-badge {
  background: linear-gradient(135deg, var(--green), #059669);
  color: #fff;
  padding: 8px 16px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 20px;
  font-size: 0.9em;
}

.auth-form .form-control {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 14px 16px;
  border-radius: 10px;
  width: 100%;
  font-size: 14px;
  margin-bottom: 12px;
}

.auth-form .form-control:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255,255,255,0.08);
}

.auth-form .form-control::placeholder {
  color: var(--text-dim);
}

.auth-form .btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  margin-top: 8px;
}

.divider {
  display: flex;
  align-items: center;
  margin: 20px 0;
  color: var(--text-dim);
}

.divider::before, .divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--border);
}

.divider span {
  padding: 0 15px;
  font-size: 12px;
}

.btn-google {
  width: 100%;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: #333;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-google:hover {
  background: #f5f5f5;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  color: var(--text-dim);
  font-size: 13px;
}

.auth-footer a {
  color: var(--accent);
  text-decoration: none;
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 13px;
}

.alert-danger {
  background: rgba(255, 71, 87, 0.15);
  border: 1px solid rgba(255, 71, 87, 0.3);
  color: var(--red);
}

.alert-success {
  background: var(--green-dim);
  border: 1px solid rgba(0, 230, 138, 0.3);
  color: var(--green);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .qf-nav {
    padding: 12px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .qf-nav-links {
    display: none;
  }

  .qf-nav-actions {
    gap: 8px;
  }

  .qf-nav-actions .btn-secondary,
  .qf-nav-actions .btn-primary {
    padding: 8px 12px;
    font-size: 12px;
  }

  .qf-nav-actions .user-email {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 11px;
  }

  .qf-hero {
    padding: 40px 16px 40px;
  }

  .qf-hero h1 {
    font-size: 32px;
  }

  .qf-stats {
    padding: 0 16px 32px;
  }

  .stat-card {
    min-width: 140px;
  }

  .qf-live-panel {
    margin: 0 16px 32px;
  }

  .qf-convergence {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .qf-capabilities {
    padding: 0 16px 48px;
  }

  .capability-card {
    min-width: 100%;
  }
}