:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: #1e293b;
  background-color: #f8fafc;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #10b981;
  --success-hover: #059669;
  --warning: #f59e0b;
  --warning-hover: #d97706;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #64748b;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: var(--primary);
  text-decoration: inherit;
}
a:hover {
  color: var(--primary-hover);
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

.logo {
  height: 6em;
  padding: 1.5em;
  will-change: filter;
  transition: filter 300ms;
}
.logo:hover {
  filter: drop-shadow(0 0 2em #646cffaa);
}
.logo.vanilla:hover {
  filter: drop-shadow(0 0 2em #f7df1eaa);
}

.card {
  padding: 2em;
}

.read-the-docs {
  color: #888;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: var(--primary);
  color: white;
  cursor: pointer;
  transition: background-color 0.25s, border-color 0.25s;
}
button:hover {
  background-color: var(--primary-hover);
}
button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

@media (prefers-color-scheme: light) {
  :root {
    color: var(--text-primary);
    background-color: #f8fafc;
  }
  a:hover {
    color: var(--primary-hover);
  }
}

.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.login-card {
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 12px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  border: 1px solid var(--border-color);
}

.login-title {
  color: var(--text-primary);
  margin: 0 0 2rem 0;
  font-size: 1.8rem;
  text-align: center;
}

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

.form-group label {
  display: block;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: #fff;
  color: var(--text-primary);
  font-size: 1rem;
  box-sizing: border-box;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-button {
  width: 100%;
  padding: 0.875rem;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.25s;
}

.login-button:hover {
  background-color: var(--primary-hover);
  border-color: transparent;
}

.login-error {
  color: var(--danger);
  text-align: center;
  margin-top: 1rem;
  font-size: 0.9rem;
}

.dashboard {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
  min-height: 100px;
}

.dashboard-header h1 {
  font-size: 2.4rem;
  margin: 0;
}

.dashboard-content {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.logout-button {
  background-color: var(--danger);
  color: white;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.logout-button:hover {
  background-color: var(--danger-hover);
  border-color: transparent;
}

.status-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
}

.status-pending {
  background-color: #fef3c7;
  color: #d97706;
}

.status-paid {
  background-color: #d1fae5;
  color: #059669;
}

.status-overdue {
  background-color: #fee2e2;
  color: #dc2626;
}

.status-draft {
  background-color: #f1f5f9;
  color: #64748b;
}

.amount-display {
  font-family: 'Courier New', monospace;
  font-weight: 600;
  color: var(--text-primary);
}

.card-stat {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.card-stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.card-stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.card-stat.negative .card-stat-value {
  color: var(--danger);
}

/* Layout with sidebar */
.app-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  height: fit-content;
}

.sidebar-brand {
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  display: block;
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  color: var(--text-primary);
  text-decoration: none;
  border: 1px solid transparent;
}

.nav-link:hover {
  background: #f1f5f9;
}

.nav-link.active {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1e40af;
}

.sidebar-footer {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-start;
}