html {
    font-size: 15px;
}

:root {
    --primary-color: #004d40;
    --primary-dark: #00332a;
    --primary-light: #00796b;
    --secondary-color: #00796b;
    --accent-color: #ffc107;
    --accent-dark: #ff9800;
    --success-color: #56ab2f;
    --success-dark: #3d7a20;
    --warning-color: #ffc107;
    --info-color: #00796b;
    --dark-color: #212121;
    --light-color: #f5f5f5;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow: 0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px 0 rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
}
*, *::before, *::after { box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px; line-height: 1.6; color: var(--dark-color);
    background: linear-gradient(135deg, #a8e063 0%, #56ab2f 100%);
    background-attachment: fixed; min-height: 100vh; margin: 0;
}
.navbar {
    background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm); border-bottom: 1px solid rgba(255,255,255,0.2);
    position: sticky; top: 0; z-index: 1000;
}
.navbar-inner {
    max-width: 1200px; margin: 0 auto; padding: 0.75rem 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand {
    display: flex; align-items: center; gap: 0.5rem;
    font-weight: 700; font-size: 1.5rem; color: var(--primary-color); text-decoration: none;
    user-select: none; -webkit-user-select: none;
}
.navbar-brand:hover { color: var(--primary-dark); }
.navbar-toggle {
    display: none; flex-direction: column; gap: 4px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.navbar-toggle span { width: 24px; height: 2px; background: var(--gray-700); border-radius: 2px; }
.navbar-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-link { font-weight: 500; color: var(--gray-700); text-decoration: none; transition: color 0.2s; padding: 0; }
.nav-link:hover { color: var(--primary-color); }
@media (max-width: 768px) {
    .navbar-toggle { display: flex; }
    .navbar-links { display: none; flex-direction: column; width: 100%; padding-top: 1rem; }
    .navbar-links.is-open { display: flex; }
    .navbar-inner { flex-wrap: wrap; }
}
@media (max-width: 1200px) {
    html { font-size: 14px; }
}
.container { max-width: 1200px; margin: 2rem auto; padding: 0 1.5rem; }
.card {
    border: none; border-radius: var(--border-radius); box-shadow: var(--shadow);
    background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
    transition: transform 0.2s, box-shadow 0.2s; overflow: hidden;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white; padding: 1.25rem 1.5rem; font-weight: 600;
}
.card-body { padding: 1.5rem; }
.btn {
    border-radius: var(--border-radius-sm); font-weight: 600; font-size: 0.875rem;
    padding: 0.625rem 1.25rem; border: none; cursor: pointer; transition: all 0.2s;
    display: inline-flex; align-items: center; gap: 0.5rem;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)); color: white;
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-1px); box-shadow: var(--shadow-md);
}
.btn-secondary { background: linear-gradient(135deg, var(--gray-500), var(--gray-600)); color: white; }
.btn-success { background: linear-gradient(135deg, var(--success-color), var(--success-dark)); color: white; }
.flash-container { max-width: 1200px; margin: 1rem auto; padding: 0 1.5rem; }
.flash {
    padding: 0.75rem 1rem; border-radius: var(--border-radius-sm); margin-bottom: 0.5rem;
    display: flex; justify-content: space-between; align-items: center; animation: fadeIn 0.3s ease;
}
.flash-success { background: #d1fae5; color: #065f46; }
.flash-error   { background: #fee2e2; color: #991b1b; }
.flash-warning { background: #fef3c7; color: #92400e; }
.flash-info    { background: #dbeafe; color: #1e40af; }
.flash-close   { background: none; border: none; font-size: 1.25rem; cursor: pointer; color: inherit; }
.form-control {
    border-radius: var(--border-radius-sm); border: 1px solid var(--gray-300);
    padding: 0.625rem 0.875rem; transition: border-color 0.2s, box-shadow 0.2s;
}
.form-control:focus {
    border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(0,77,64,0.15); outline: none;
}
.htmx-indicator { display: none; position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 9999; }
.htmx-request .htmx-indicator, .htmx-indicator.htmx-request { display: block; }
.spinner {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--primary-color));
    background-size: 200% 100%; animation: shimmer 1.5s infinite;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }

/* Custom gradient backgrounds */
.bg-gradient-primary { background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important; }
.bg-gradient-success { background: linear-gradient(135deg, var(--success-color), var(--success-dark)) !important; }
.bg-gradient-accent  { background: linear-gradient(135deg, var(--accent-color), var(--accent-dark)) !important; }
.bg-gradient-info    { background: linear-gradient(135deg, var(--info-color), var(--primary-light)) !important; }

/* Hero section (index.html) */
.hero-section {
    padding: 4rem 0; text-align: center;
    background: linear-gradient(135deg, rgba(0,77,64,0.1), rgba(86,171,47,0.08));
    border-radius: var(--border-radius-lg); margin-bottom: 2rem;
}
.hero-title   { font-size: 2.5rem; font-weight: 800; color: #fff; margin-bottom: 1rem; }
.hero-subtitle { font-size: 1.15rem; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 2rem; }

/* Utility classes */
.synthee-margins { padding: 0.5rem 0; }
.feature-icon    { width: 60px; height: 60px; border-radius: 50%; display: inline-flex;
                   align-items: center; justify-content: center; font-size: 1.5rem;
                   background: linear-gradient(135deg, var(--primary-color), var(--primary-light)); color: #fff; }
.shadow-xl { box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1) !important; }
.cost-highlight { background: var(--gray-50); border-left: 4px solid var(--primary-color); padding: 1rem 1.25rem;
                  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0; }

/* Animations */
.fade-in       { animation: fadeIn 0.6s ease-out; }
.slide-in-left { animation: slideInLeft 0.6s ease-out; }
.bounce-in     { animation: bounceIn 0.6s ease-out; }

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes bounceIn {
    0%   { opacity: 0; transform: scale(0.9); }
    60%  { transform: scale(1.02); }
    100% { opacity: 1; transform: scale(1); }
}