:root {
    --primary-color: #000000;
    --accent-color: #9CA3AF;
    --background-color: #FFFFFF;
    --text-primary: #000000;
    --text-muted: #6B7280;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --danger-color: #EF4444;
}

* {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", Inter, system-ui, sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: var(--background-color);
    color: var(--text-primary);
}

main {
    flex: 1;
}

.navbar {
    background-color: var(--background-color) !important;
    border-bottom: 1px solid #E5E7EB;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary) !important;
}

.navbar-brand img {
    height: 28px;
}

.nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
}

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

.btn {
    border-radius: 0;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
}

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

.btn-primary:hover {
    background-color: #333;
    border-color: #333;
}

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

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

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

.btn-info {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.card {
    border-radius: 0;
    border: 1px solid #E5E7EB;
    transition: none;
}

.card:hover {
    transform: none;
    box-shadow: none;
}

.card-header {
    border-radius: 0;
    background-color: #F9FAFB;
    border-bottom: 1px solid #E5E7EB;
}

.hero-section {
    background: var(--background-color);
    color: var(--text-primary);
    border-radius: 0;
    padding: 4rem 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.hero-section h1 {
    font-weight: 700;
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-section .lead {
    color: var(--text-muted);
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-section .btn-primary {
    background-color: var(--text-primary);
    border-color: var(--text-primary);
    padding: 0.75rem 2rem;
}

.hero-section .btn-outline-primary {
    border-color: var(--text-primary);
    color: var(--text-primary);
    padding: 0.75rem 2rem;
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    background-color: #F3F4F6 !important;
    color: var(--text-primary) !important;
    border-radius: 0;
}

.progress {
    border-radius: 0;
    height: 8px;
}

.progress-bar {
    font-weight: 500;
    font-size: 0.75rem;
}

.badge {
    font-weight: 500;
    border-radius: 0;
    padding: 0.35rem 0.65rem;
}

.bg-primary {
    background-color: var(--text-primary) !important;
}

.bg-success {
    background-color: var(--success-color) !important;
}

.bg-warning {
    background-color: var(--warning-color) !important;
}

.bg-danger {
    background-color: var(--danger-color) !important;
}

.bg-info {
    background-color: var(--accent-color) !important;
}

.text-primary {
    color: var(--text-primary) !important;
}

.table td {
    vertical-align: middle;
}

.accordion-button {
    border-radius: 0;
}

.accordion-button:not(.collapsed) {
    background-color: #F9FAFB;
    color: var(--text-primary);
}

.accordion-item {
    border-radius: 0;
}

#chatContainer {
    background-color: #F9FAFB;
}

.display-1 {
    font-weight: 700;
}

.form-control,
.form-select {
    border-radius: 0;
    border-color: #D1D5DB;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--text-primary);
    box-shadow: none;
}

.alert {
    border: none;
    border-radius: 0;
}

footer {
    border-top: 1px solid #E5E7EB;
    background-color: var(--background-color) !important;
}

.spinner-border {
    width: 1rem;
    height: 1rem;
}

pre {
    font-size: 0.875rem;
    line-height: 1.5;
    border-radius: 0;
}

.list-group-item {
    border-radius: 0;
    transition: background-color 0.15s;
}

.list-group-item:hover {
    background-color: #F9FAFB;
}

.modal-content {
    border-radius: 0;
}

.input-group-text {
    border-radius: 0;
}

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 1rem;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .display-1 {
        font-size: 3rem;
    }
}

.border-bottom:last-child {
    border-bottom: none !important;
}

.callable-logo {
    height: 24px;
}

.section-title {
    font-weight: 700;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}