/* Custom Variables */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --error-color: #dc2626;
    --success-color: #059669;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
}

/* Body & Layout */
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

/* Form Styling */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    background-color: white;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--gray-400);
}

.form-error {
    color: var(--error-color);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
}

.form-error::before {
    content: "⚠";
    margin-right: 0.25rem;
}

/* Button Enhancements */
.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border: none;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary.loading {
    pointer-events: none;
    opacity: 0.8;
}

/* Card Enhancements */
.card {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

/* Logo Styling */
.card-body img {
    transition: transform 0.3s ease;
}

.card-body img:hover {
    transform: scale(1.05);
}

/* Navbar Enhancements */
/* Navbar Enhancements */
.navbar {
    backdrop-filter: blur(8px);
    min-height: 4rem;
}

.navbar-start {
    flex: 1;
    justify-content: flex-start;
}

.navbar-end {
    flex: none;
    justify-content: flex-end;
}

/* Mobile navbar adjustments */
@media (max-width: 640px) {
    .navbar .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .navbar-start a {
        font-size: 1.25rem;
    }
    
    .navbar-end .btn {
        padding: 0.5rem 0.75rem;
        min-height: 2rem;
    }
    
    .navbar-end .btn i {
        margin-right: 0;
    }
}

/* Password Toggle */
.password-toggle {
    cursor: pointer;
    user-select: none;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading Animation */
.loading-pulse {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Responsive Design */
@media (max-width: 640px) {
    .card-body {
        padding: 1.5rem;
    }
    
    .card-body h1 {
        font-size: 1.5rem;
    }
    
    .form-input {
        padding: 0.625rem 0.875rem;
    }
    
    .btn-lg {
        padding: 0.75rem 1.5rem;
    }
}

/* Focus States */
.checkbox:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: 0.25rem;
}

/* Error Alert Styling */
.alert-error {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border: 1px solid #fca5a5;
    color: var(--error-color);
}

/* Success States */
.form-input.success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}