/* BuildEstimate Pro - Main Styles */
:root {
  --navy-primary: #0B1F3B;
  --orange-accent: #F59E0B;
  --bg-light: #F5F6F8;
  --text-dark: #1F2937;
  --text-light: #6B7280;
  --border-color: #E5E7EB;
  --success: #10B981;
  --error: #EF4444;
  --warning: #F59E0B;
}

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

body {
  font-family: 'Inter', 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}

/* Layout */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.header {
  background-color: var(--navy-primary);
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.logo {
  height: 40px;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: var(--orange-accent);
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
}

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

.btn-primary:hover {
  background-color: #DC8008;
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(245, 158, 11, 0.3);
}

.btn-secondary {
  background-color: white;
  color: var(--navy-primary);
  border: 2px solid var(--navy-primary);
}

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

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

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

/* Cards */
.card {
  background: white;
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  transition: box-shadow 0.3s;
}

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

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

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-dark);
}

.form-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.3s;
}

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

.form-select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  font-size: 1rem;
  background-color: white;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 0.5rem;
  overflow: hidden;
}

.table th {
  background-color: var(--navy-primary);
  color: white;
  padding: 1rem;
  text-align: left;
  font-weight: 600;
}

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

.table tr:last-child td {
  border-bottom: none;
}

.table tr:hover {
  background-color: var(--bg-light);
}

/* Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: linear-gradient(135deg, var(--navy-primary) 0%, #1a3a5c 100%);
  color: white;
  padding: 2rem;
  border-radius: 0.75rem;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: var(--orange-accent);
  opacity: 0.1;
  border-radius: 50%;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--navy-primary) 0%, #1a3a5c 100%);
  color: white;
  padding: 4rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* Calculator Tabs */
.calculator-tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--border-color);
}

.tab-button {
  padding: 1rem 2rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  color: var(--text-light);
}

.tab-button.active {
  color: var(--orange-accent);
  border-bottom-color: var(--orange-accent);
}

.tab-button:hover {
  color: var(--navy-primary);
}

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

.modal {
  background: white;
  border-radius: 0.75rem;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2rem;
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
}

.alert-success {
  background-color: #D1FAE5;
  color: #065F46;
  border: 1px solid #10B981;
}

.alert-error {
  background-color: #FEE2E2;
  color: #991B1B;
  border: 1px solid #EF4444;
}

.alert-warning {
  background-color: #FEF3C7;
  color: #92400E;
  border: 1px solid #F59E0B;
}

/* Footer */
.footer {
  background-color: var(--navy-primary);
  color: white;
  padding: 2rem 0;
  text-align: center;
  margin-top: 4rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

.footer-links a {
  color: white;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--orange-accent);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .nav-links {
    flex-direction: column;
    gap: 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .calculator-tabs {
    flex-direction: column;
  }
}

/* Loading spinner */
.spinner {
  border: 3px solid var(--border-color);
  border-top: 3px solid var(--orange-accent);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 2rem auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Hidden utility */
.hidden {
  display: none;
}