/* Global Styles */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8f9fb;
    color: #2d3748;
    line-height: 1.6;
}

/* Custom Color Palette */
:root {
    --primary-color: #0066cc;
    --secondary-color: #4a90e2;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-bg: #f8f9fb;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
}

/* Navigation */
.navbar {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    margin-bottom: 2rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.card-header {
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    border-bottom: none;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

.card-body {
    padding: 2rem 1.5rem;
}

/* Forms */
.form-control, .form-select {
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    background-color: #fff;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
    outline: none;
}

.form-label {
    font-weight: 500;
    color: #374151;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.form-label i {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    border-radius: 8px;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: all 0.2s ease;
    text-transform: none;
    border-width: 2px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0052a3, #3a7bc8);
    border-color: #0052a3;
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #20c997);
    border-color: var(--success-color);
}

.btn-success:hover {
    background: linear-gradient(135deg, #218838, #1e7e34);
    transform: translateY(-1px);
}

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

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Login/Register Forms */
.login-form-container,
.register-form-container {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.login-logo {
    max-height: 80px;
    width: auto;
}

.login-form,
.register-form {
    background: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
}

/* Supplier Form */
.supplier-form {
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Alerts */
.alert {
    border: none;
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

/* Captcha */
.cursor-pointer {
    cursor: pointer;
}

#captchaImage {
    border-radius: 6px;
    transition: opacity 0.2s ease;
}

#captchaImage:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-body {
        padding: 1.5rem 1rem;
    }
    
    .login-form-container,
    .register-form-container {
        padding: 1rem;
    }
    
    .login-form,
    .register-form {
        padding: 1.5rem;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1rem;
    }
    
    .navbar-brand span {
        display: none;
    }
    
    .card-header h5 {
        font-size: 1rem;
    }
}

/* Loading States */
.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Footer */
.footer {
    background-color: white;
    border-top: 1px solid #e2e8f0;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Utility Classes */
.text-primary {
    color: var(--primary-color) !important;
}

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

.opacity-75 {
    opacity: 0.75;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Smooth Transitions */
* {
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

/* Section Headers */
.card-header.bg-primary { background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important; }
.card-header.bg-success { background: linear-gradient(135deg, var(--success-color), #20c997) !important; }
.card-header.bg-warning { background: linear-gradient(135deg, var(--warning-color), #fd7e14) !important; }
.card-header.bg-info { background: linear-gradient(135deg, var(--info-color), #6f42c1) !important; }
.card-header.bg-purple { background: linear-gradient(135deg, #6f42c1, #9b59b6) !important; color: white !important; }
.card-header.bg-secondary { background: linear-gradient(135deg, #6c757d, #495057) !important; }
.card-header.bg-dark { background: linear-gradient(135deg, #343a40, #212529) !important; }