/**
 * Design System - Form Components
 * 
 * Standardized form input styles.
 */

/* Base Input Styles */
.input,
.textarea,
.select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-base);
    border-radius: var(--radius-base);
    transition: var(--transition-base);
}

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

.input:disabled,
.textarea:disabled,
.select:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* Input Variants */
.input--error {
    border-color: var(--color-error);
}

.input--error:focus {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(var(--color-error-rgb), 0.1);
}

.input--success {
    border-color: var(--color-success);
}

/* Input Sizes */
.input--sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

.input--lg {
    padding: var(--space-4) var(--space-5);
    font-size: var(--text-lg);
}

/* Textarea */
.textarea {
    min-height: 120px;
    resize: vertical;
}

/* Select Dropdown */
.select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23444' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-4) center;
    padding-right: var(--space-10);
}

/* Checkbox & Radio */
.checkbox,
.radio {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-dark);
    background: var(--bg-primary);
    cursor: pointer;
    position: relative;
    transition: var(--transition-fast);
}

.checkbox {
    border-radius: var(--radius-sm);
}

.radio {
    border-radius: 50%;
}

.checkbox:checked,
.radio:checked {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.radio:checked::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

/* Form Group */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.form-label--required::after {
    content: '*';
    color: var(--color-error);
    margin-left: var(--space-1);
}

.form-help {
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.form-error {
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-error);
}

/* Input with Icon */
.input-group {
    position: relative;
}

.input-group__icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.input-group__icon + .input {
    padding-left: var(--space-10);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle__slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-gray-300);
    transition: var(--transition-base);
    border-radius: var(--radius-full);
}

.toggle__slider::before {
    position: absolute;
    content: '';
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-base);
    border-radius: 50%;
}

.toggle input:checked + .toggle__slider {
    background-color: var(--color-primary);
}

.toggle input:checked + .toggle__slider::before {
    transform: translateX(20px);
}

.toggle input:focus + .toggle__slider {
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}