:root {
  --bg-dark: #0a0a0a;
  --bg-gradient-start: #1a1a2e;
  --bg-gradient-end: #0f0f1a;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.1);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --accent-green: #10b981;
  --accent-orange: #ff5722;
  --accent-purple: #8b5cf6;
  --accent-blue: #3b82f6;
  --error: #ef4444;
  --success: #10b981;
  --warning: #f59e0b;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Mono', monospace;
  font-weight: 700;
  letter-spacing: -0.02em;
}

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Auth Pages */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-box {
  background: var(--surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 3rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.auth-box h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: var(--accent-green);
}

.auth-box p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input {
  width: 100%;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.2s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent-green);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.btn {
  padding: 0.875rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-block;
  font-family: 'Space Mono', monospace;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--accent-orange);
  color: white;
  width: 100%;
}

.btn-primary:hover {
  background: #ff6b3d;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 87, 34, 0.3);
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary.loading {
  opacity: 0.7;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--surface-hover);
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border);
}

.auth-switch {
  text-align: center;
  margin-top: 1.5rem;
  color: var(--text-secondary);
}

.auth-switch button {
  color: var(--accent-green);
  background: none;
  border: none;
  cursor: pointer;
  font-weight: 600;
  text-decoration: underline;
  padding: 0;
  margin-left: 0.25rem;
}

.auth-switch button:hover {
  color: #14d99d;
}

.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--error);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

/* Dashboard */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.dashboard-header h1 {
  font-size: 2.5rem;
  color: var(--accent-green);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-email {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Tier Badge */
.tier-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tier-free {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
}

.tier-pro {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(59, 130, 246, 0.2));
  color: var(--accent-purple);
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.tier-premium {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(255, 87, 34, 0.2));
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.upgrade-btn-small {
  padding: 0.25rem 0.75rem;
  background: var(--accent-orange);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.upgrade-btn-small:hover {
  background: #ff6b3d;
}

/* Usage Meter */
.usage-meter {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.usage-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.usage-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.usage-count {
  font-family: 'Space Mono', monospace;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.unlimited-badge {
  font-size: 1.5rem;
  color: var(--accent-green);
}

.usage-bar {
  flex: 1;
  min-width: 200px;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.usage-fill {
  height: 100%;
  background: var(--accent-green);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.usage-meter.near-limit .usage-fill {
  background: var(--warning);
}

.usage-meter.at-limit .usage-fill {
  background: var(--error);
}

.usage-warning {
  font-size: 0.75rem;
  color: var(--warning);
  font-weight: 500;
}

.upgrade-link {
  background: none;
  border: none;
  color: var(--accent-orange);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.upgrade-link:hover {
  color: #ff6b3d;
  text-decoration: underline;
}

.add-link-form {
  background: var(--surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.add-link-form h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.form-row {
  display: grid;
  grid-template-columns: 2fr 2fr 1fr auto;
  gap: 1rem;
  align-items: end;
}

.links-container {
  display: grid;
  gap: 1rem;
}

.link-card {
  background: var(--surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.2s ease;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: start;
}

.link-card:hover {
  background: var(--surface-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.link-info h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.link-url {
  color: var(--accent-green);
  font-size: 0.875rem;
  word-break: break-all;
  margin-bottom: 0.5rem;
  text-decoration: none;
  display: inline-block;
}

.link-url:hover {
  text-decoration: underline;
}

.link-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.link-category {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.link-actions {
  display: flex;
  gap: 0.5rem;
}

.icon-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.875rem;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.icon-btn.delete:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--error);
  color: var(--error);
}

.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-muted);
}

.empty-state h2 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

/* Edit Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  z-index: 1000;
}

.modal {
  background: var(--bg-gradient-start);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

.modal h2 {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.modal-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.modal-actions .btn {
  flex: 1;
}

/* Upgrade Modal */
.upgrade-modal {
  text-align: center;
  max-width: 400px;
}

.upgrade-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.upgrade-modal h2 {
  color: var(--accent-orange);
}

.upgrade-modal p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Pricing Page */
.pricing-page {
  padding: 2rem 0;
}

.pricing-header {
  text-align: center;
  margin-bottom: 3rem;
}

.pricing-header .btn-ghost {
  margin-bottom: 2rem;
}

.pricing-header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.pricing-header p {
  color: var(--text-secondary);
  font-size: 1.125rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.pricing-card.popular {
  border-color: var(--accent-purple);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.1) 0%, var(--surface) 50%);
}

.pricing-card.current {
  border-color: var(--accent-green);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-purple);
  color: white;
  padding: 0.25rem 1rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-tier-name {
  font-family: 'Space Mono', monospace;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.pricing-price {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.price-currency {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.price-amount {
  font-family: 'Space Mono', monospace;
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-period {
  font-size: 1rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pricing-features .check {
  color: var(--accent-green);
  font-weight: bold;
}

.pricing-action .btn {
  width: 100%;
}

.pricing-faq {
  text-align: center;
  padding: 2rem;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.pricing-faq h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pricing-faq p {
  color: var(--text-secondary);
}

/* Billing Page */
.billing-page {
  padding: 2rem 0;
}

.billing-header {
  margin-bottom: 2rem;
}

.billing-header .btn-ghost {
  margin-bottom: 1rem;
}

.billing-header h1 {
  font-size: 2rem;
  color: var(--text-primary);
}

.billing-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.billing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}

.billing-card h3 {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.current-plan {
  margin-bottom: 2rem;
}

.plan-name {
  font-family: 'Space Mono', monospace;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.plan-price {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

.usage-section {
  margin-bottom: 2rem;
}

.usage-section h4 {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.usage-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

.usage-item:last-child {
  border-bottom: none;
}

.billing-actions {
  margin-top: 1rem;
}

.billing-actions .btn {
  width: 100%;
}

.feature-list {
  list-style: none;
  margin-bottom: 1.5rem;
}

.feature-list li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.feature-list .check {
  color: var(--accent-green);
  font-weight: bold;
}

/* Responsive */
@media (max-width: 992px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .billing-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .header-right {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .link-card {
    grid-template-columns: 1fr;
  }

  .link-actions {
    justify-content: flex-start;
  }

  .usage-meter {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .usage-bar {
    min-width: 100%;
  }
}