/* 
 * Data Analysis Platform - Main Stylesheet
 * Inspired by Notion's minimalist design language
 */

:root {
  /* Core color palette */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-dark: #111827;
  --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;
  
  /* UI component colors */
  --color-background: #ffffff;
  --color-text: #111827;
  --color-text-secondary: #4b5563;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-shadow: rgba(0, 0, 0, 0.06);
  
  /* Feature card background colors */
  --color-feature-purple: #7c3aed;
  --color-feature-violet: #8b5cf6;
  --color-feature-indigo: #6366f1;
  --color-feature-blue: #3b82f6;
}

/* Base elements */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.5;
  font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-light);
}

/* Navbar */
.navbar {
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
}

.navbar-brand {
  font-weight: 600;
  color: var(--color-text) !important;
  display: flex;
  align-items: center;
}

.navbar .nav-link {
  color: var(--color-text-secondary) !important;
  font-weight: 500;
  padding: 0.5rem 1rem;
}

.navbar .nav-link:hover {
  color: var(--color-primary) !important;
}

/* Buttons */
.btn {
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

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

.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.btn-outline-primary {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline-primary:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Cards */
.card {
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px 0 var(--color-shadow), 0 1px 2px 0 var(--color-shadow);
  background-color: var(--color-background);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card-header {
  background-color: transparent;
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
}

.card-body {
  padding: 1.5rem;
}

/* Auth card */
.auth-card {
  max-width: 100%;
  border-radius: 0.75rem;
  padding: 2rem;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.auth-card-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.auth-card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.auth-card-subtitle {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Feature items */
.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: white;
}

.feature-item {
  padding: 1rem 0;
  display: flex;
  align-items: center;
}

.feature-item h4 {
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.feature-item p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Hero section */
.hero-section {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: 5rem 0;
  border-radius: 0 0 8px 8px;
  margin-bottom: 3rem;
}

.hero-section h1 {
  font-weight: 700;
  font-size: 3rem;
  line-height: 1.2;
  color: white;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.hero-section p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}

/* Footer */
.footer {
  background-color: var(--color-background);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer a {
  color: var(--color-text-muted);
}

.footer a:hover {
  color: var(--color-primary);
}

/* Modal */
.modal-content {
  border: none;
  border-radius: 0.5rem;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.modal-header {
  border-bottom: 1px solid var(--color-border);
}

.modal-footer {
  border-top: 1px solid var(--color-border);
}

/* Utilities */
.text-muted {
  color: var(--color-text-muted) !important;
}

.shadow-sm {
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.shadow {
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}

.shadow-md {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.shadow-lg {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Form elements */
.form-control {
  border: 1px solid var(--color-gray-300);
  border-radius: 0.375rem;
  padding: 0.625rem 0.75rem;
  font-size: 0.875rem;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

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

.bg-feature-purple {
  background-color: var(--color-feature-purple);
}

.bg-feature-violet {
  background-color: var(--color-feature-violet);
}

.bg-feature-indigo {
  background-color: var(--color-feature-indigo);
}

.bg-feature-blue {
  background-color: var(--color-feature-blue);
}