/* Form Components */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group:last-child {
    margin-bottom: 0;
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

label.required::after {
    content: ' *';
    color: var(--error-color);
}

/* Input styles */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="tel"],
input[type="url"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    line-height: 1.5;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

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

input:invalid,
textarea:invalid,
select:invalid {
    border-color: var(--error-color);
}

input:invalid:focus,
textarea:invalid:focus,
select:invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

input:disabled,
textarea:disabled,
select:disabled {
    background-color: var(--bg-secondary);
    color: var(--text-light);
    cursor: not-allowed;
    opacity: 0.7;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-light);
    opacity: 1;
}

/* Textarea specific */
textarea {
    min-height: 100px;
    resize: vertical;
}

/* Select specific */
select {
    cursor: pointer;
    background-image: url("data:image/svg+xml;charset=US-ASCII,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'><path fill='%23666' d='m0 1 2 2 2-2z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    padding-right: 40px;
}

select:focus {
    background-image: url("data:image/svg+xml;charset=US-ASCII,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'><path fill='%232563eb' d='m0 1 2 2 2-2z'/></svg>");
}

/* Checkbox and radio */
input[type="checkbox"],
input[type="radio"] {
    width: auto;
    margin-right: var(--spacing-xs);
    cursor: pointer;
}

.checkbox-group,
.radio-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.checkbox-item input,
.radio-item input {
    margin-right: var(--spacing-sm);
    margin-bottom: 0;
}

/* Form validation */
.form-error {
    color: var(--error-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form-error::before {
    content: '⚠';
    font-size: 1rem;
}

.form-success {
    color: var(--success-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.form-success::before {
    content: '✓';
    font-size: 1rem;
}

.form-help {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* Input groups */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group input {
    border-radius: 0;
    border-right: none;
}

.input-group input:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.input-group input:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
    border-right: 1px solid var(--border-color);
}

.input-group-prepend,
.input-group-append {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    white-space: nowrap;
}

.input-group-prepend {
    border-right: none;
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.input-group-append {
    border-left: none;
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

.input-group .input-group-prepend + input {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group input + .input-group-append {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* Form layouts */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.form-row-3 {
    grid-template-columns: 1fr 1fr 1fr;
}

.form-row-4 {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.form-inline {
    display: flex;
    align-items: end;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.form-inline .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 200px;
}

/* Search forms */
.search-form {
    position: relative;
}

.search-input {
    padding-right: 3rem;
}

.search-button {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    border: none;
    background: none;
    padding: 0 var(--spacing-md);
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.search-button:hover {
    color: var(--primary-color);
    background-color: var(--bg-secondary);
}

/* File inputs */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    cursor: pointer;
}

.file-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.file-input-label:hover {
    background-color: var(--bg-secondary);
    border-color: var(--primary-color);
}

.file-input:focus + .file-input-label {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Form sections */
.form-section {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.form-section h3 {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    color: var(--text-primary);
}

.form-section:last-child {
    margin-bottom: 0;
}

/* Form actions */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
}

.form-actions-left {
    justify-content: flex-start;
}

.form-actions-center {
    justify-content: center;
}

.form-actions-between {
    justify-content: space-between;
}

/* Responsive forms */
@media (max-width: 768px) {
    .form-row,
    .form-row-3,
    .form-row-4 {
        grid-template-columns: 1fr;
    }
    
    .form-inline {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-inline .form-group {
        min-width: auto;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions-between {
        flex-direction: column-reverse;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .input-group input,
    .input-group-prepend,
    .input-group-append {
        border-radius: var(--border-radius);
        border: 1px solid var(--border-color);
    }
    
    .input-group input:not(:first-child),
    .input-group-append:not(:first-child) {
        border-top: none;
        border-top-left-radius: 0;
        border-top-right-radius: 0;
    }
    
    .input-group input:not(:last-child),
    .input-group-prepend:not(:last-child) {
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0;
    }
}

/* Loading states */
.form-loading {
    position: relative;
    pointer-events: none;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
}

.form-loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}