src/static/css/subject_form.css

.form-container {
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

.form-header {
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.form-header h2 {
    color: var(--text-primary);
    font-weight: 700;
    margin: 0;
}

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

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

.form-control {
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.75rem;
    width: 100%;
    font-size: 1rem;
    background: var(--background-primary);
    color: var(--text-primary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-color-alpha);
    background: var(--background-primary);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    color: white;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--primary-color-alpha);
    color: white;
}

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

.btn-secondary {
    background: var(--text-secondary);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    color: var(--background-primary);
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.2s ease, transform 0.2s ease;
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--text-primary);
    color: var(--background-primary);
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-outline-secondary {
    background: transparent;
    border: 2px solid var(--border-color);
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-outline-secondary:hover {
    background: var(--background-light);
    border-color: var(--primary-color);
    color: var(--text-primary);
    text-decoration: none;
}

.help-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    line-height: 1.4;
}

.error-message {
    color: var(--danger-color, #dc2626);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    line-height: 1.4;
}

.success-message {
    color: var(--success-color, #059669);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    line-height: 1.4;
}

/* Form validation states */
.form-control.is-invalid {
    border-color: var(--danger-color, #dc2626);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-control.is-valid {
    border-color: var(--success-color, #059669);
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
}

/* Dark mode specific adjustments */
[data-theme="dark"] .form-container {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .form-control {
    border-color: var(--border-color);
    background: var(--background-secondary);
}

[data-theme="dark"] .form-control:focus {
    background: var(--background-secondary);
}

/* Responsive adjustments */
@media (max-width: 576px) {
    .form-container {
        padding: 1.5rem;
        margin: 1rem 0;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline-secondary {
        width: 100%;
        text-align: center;
        margin-bottom: 0.5rem;
    }
}

/* Loading state for buttons */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}