@import url('https://fonts.googleapis.com/css2?family=Cabinet+Grotesk:wght@400;500;600;700;800&family=Space+Mono:wght@400;700&display=swap');

:root {
  --bg-primary: #0a0a0b;
  --bg-secondary: #111113;
  --bg-tertiary: #1a1a1e;
  --bg-card: #141416;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-dark: #d97706;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --border: #27272a;
  --border-light: #3f3f46;
}

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

body {
  font-family: 'Cabinet Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.mono {
  font-family: 'Space Mono', monospace;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
}

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

.btn-secondary:hover {
  background: var(--bg-card);
  border-color: var(--border-light);
}

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

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.btn-small {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #059669;
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 15px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
}

/* Landing Page */
.landing-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hero {
  text-align: center;
  padding: 100px 0 80px;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero h1 span {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-visual {
  margin-top: 60px;
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.demo-email {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 24px;
  text-align: left;
}

.demo-email-header {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.demo-email-avatar {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #000;
}

.demo-email-meta {
  flex: 1;
}

.demo-email-from {
  font-weight: 600;
  margin-bottom: 2px;
}

.demo-email-subject {
  color: var(--text-secondary);
  font-size: 14px;
}

.demo-email-body {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

.typing-indicator {
  display: inline-block;
}

.typing-indicator span {
  animation: blink 1s infinite;
}

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

/* Features Section */
.features {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.section-title {
  text-align: center;
  font-size: 36px;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 60px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  transition: all 0.2s ease;
}

.feature-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(245, 158, 11, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 15px;
}

/* Pricing Section */
.pricing {
  padding: 80px 0;
}

.pricing-card {
  max-width: 400px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 2px solid var(--accent);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
}

.pricing-badge {
  display: inline-block;
  background: var(--accent);
  color: #000;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.pricing-amount {
  font-size: 56px;
  font-weight: 800;
  margin-bottom: 4px;
}

.pricing-amount span {
  font-size: 20px;
  color: var(--text-secondary);
  font-weight: 500;
}

.pricing-period {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.pricing-feature:last-child {
  border-bottom: none;
}

.pricing-check {
  color: var(--success);
  font-size: 18px;
}

.pricing-cta {
  width: 100%;
}

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* Auth Pages */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

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

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}

.auth-title {
  font-size: 24px;
  text-align: center;
  margin-bottom: 8px;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  color: var(--text-secondary);
  font-size: 14px;
}

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

.auth-footer a:hover {
  text-decoration: underline;
}

.error-message {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error);
  color: var(--error);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
}

/* Dashboard */
.dashboard-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.sidebar-logo {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-nav {
  flex: 1;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  margin-bottom: 4px;
  transition: all 0.2s ease;
}

.sidebar-link:hover, .sidebar-link.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-link.active {
  color: var(--accent);
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #000;
}

.user-name {
  font-weight: 600;
  font-size: 14px;
}

.user-email {
  font-size: 12px;
  color: var(--text-muted);
}

.main-content {
  flex: 1;
  padding: 32px;
  overflow-y: auto;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 32px;
  font-weight: 700;
}

.stat-value.success {
  color: var(--success);
}

.stat-value.warning {
  color: var(--warning);
}

.stat-value.error {
  color: var(--error);
}

/* Invoice Table */
.invoices-table {
  width: 100%;
  border-collapse: collapse;
}

.invoices-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

.invoices-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.invoices-table tr:hover {
  background: var(--bg-secondary);
}

.client-name {
  font-weight: 600;
}

.client-email {
  font-size: 13px;
  color: var(--text-muted);
}

.amount {
  font-family: 'Space Mono', monospace;
  font-weight: 600;
}

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.status-pending {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.status-paid {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.status-overdue {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
}

.status-responded {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

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

.action-btn {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.action-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
}

.action-btn.primary:hover {
  background: var(--accent-light);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform 0.2s ease;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

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

.modal-title {
  font-size: 20px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-title {
  font-size: 20px;
  margin-bottom: 8px;
}

.empty-desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* Subscription Banner */
.subscription-banner {
  background: linear-gradient(135deg, var(--accent-dark) 0%, var(--accent) 100%);
  color: #000;
  padding: 24px;
  border-radius: 12px;
  margin-bottom: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.subscription-banner h3 {
  font-size: 20px;
  margin-bottom: 4px;
}

.subscription-banner p {
  opacity: 0.8;
}

.subscription-banner .btn {
  background: #000;
  color: var(--accent);
}

.subscription-banner .btn:hover {
  background: #1a1a1a;
}

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1001;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.success {
  border-color: var(--success);
}

.toast.error {
  border-color: var(--error);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .main-content {
    padding: 20px;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

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

  .invoices-table {
    display: block;
    overflow-x: auto;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-cta {
    flex-direction: column;
  }
}