/* BICS - Tailwind-inspired styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Colors */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-gray-900);
  background: var(--color-gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* Header */
.header {
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--spacing-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav {
  display: flex;
  gap: var(--spacing-2);
}

.nav-btn {
  padding: var(--spacing-2) var(--spacing-4);
  background: transparent;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  font-weight: 500;
  color: var(--color-gray-600);
  transition: all 0.2s;
}

.nav-btn:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

.nav-btn.active {
  background: var(--color-primary);
  color: white;
}

.user-menu-btn {
  padding: var(--spacing-2);
  background: transparent;
  border: 1px solid var(--color-gray-300);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s;
}

.user-menu-btn:hover {
  background: var(--color-gray-100);
}

/* Main */
.main {
  min-height: calc(100vh - 80px);
  padding: var(--spacing-6) 0;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-6);
}

/* Views */
.view {
  display: none;
}

.view.active {
  display: block;
}

/* Loading */
.loading-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: var(--spacing-4);
}

.spinner {
  width: 3rem;
  height: 3rem;
  border: 4px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Offline indicator */
.offline-indicator {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-warning);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  z-index: 999;
  transition: all 0.3s;
}

.offline-indicator.hidden {
  display: none;
}

/* Icons */
.icon {
  width: 1.5rem;
  height: 1.5rem;
}

/* Cards */
.card {
  background: white;
  border-radius: 0.75rem;
  padding: var(--spacing-6);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: var(--spacing-6);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-4);
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.kpi-card {
  background: white;
  border-radius: 0.75rem;
  padding: var(--spacing-4);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border-left: 4px solid var(--color-primary);
}

.kpi-label {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: var(--spacing-2);
}

.kpi-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

.kpi-unit {
  font-size: 1rem;
  color: var(--color-gray-500);
  margin-left: var(--spacing-1);
}

/* Form elements */
.form-group {
  margin-bottom: var(--spacing-4);
}

label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-2);
  color: var(--color-gray-700);
}

input,
select,
textarea {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--color-gray-300);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: all 0.2s;
}

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

/* Buttons */
.btn {
  padding: var(--spacing-3) var(--spacing-6);
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
}

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

.btn-primary:hover {
  background: var(--color-primary-hover);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: white;
  border-radius: 0.75rem;
  padding: var(--spacing-6);
  max-width: 400px;
  width: 90%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: var(--spacing-4);
  right: var(--spacing-4);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  z-index: 1001;
}

.toast {
  background: white;
  padding: var(--spacing-4);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  border-left: 4px solid var(--color-success);
  min-width: 300px;
  animation: slideIn 0.3s ease-out;
}

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

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

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

/* Responsive */
@media (max-width: 768px) {
  .nav {
    display: none; /* Implement mobile menu later */
  }

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