/**
 * Micras Demographics Tool - Form Styles
 * 
 * Styles for form elements, inputs, buttons, and interactive controls.
 */

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border-dark);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-secondary);
    border-color: var(--color-text-secondary);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.btn-danger {
    background: var(--color-error);
    color: white;
    border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-error-dark);
    border-color: var(--color-error-dark);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
}

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

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

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

/* ===== Labels ===== */
.form-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}

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

/* ===== Text Inputs ===== */
.form-input {
    display: block;
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:hover {
    border-color: var(--color-text-muted);
}

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

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:disabled {
    background-color: var(--color-bg-secondary);
    cursor: not-allowed;
}

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

.form-input.error:focus {
    box-shadow: 0 0 0 3px var(--color-error-light);
}

/* ===== Number Inputs ===== */
.form-input-number {
    font-variant-numeric: tabular-nums;
}

.input-with-unit {
    display: flex;
    align-items: stretch;
}

.input-with-unit .form-input {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

.input-unit {
    display: flex;
    align-items: center;
    padding: 0 var(--space-3);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-dark);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    white-space: nowrap;
}

/* ===== Select ===== */
.form-select {
    display: block;
    width: 100%;
    padding: var(--space-2) var(--space-3);
    padding-right: var(--space-8);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236B7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-2) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-md);
    appearance: none;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-select:hover {
    border-color: var(--color-text-muted);
}

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

.form-select:disabled {
    background-color: var(--color-bg-secondary);
    cursor: not-allowed;
}

/* ===== Radio and Checkbox ===== */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

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

.form-check-input {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 2px;
    cursor: pointer;
}

.form-check-input[type="radio"] {
    border-radius: 50%;
}

.form-check-label {
    font-size: var(--text-sm);
    cursor: pointer;
}

.form-check-description {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

/* Radio group with cards */
.radio-group-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-3);
}

.radio-card {
    position: relative;
    padding: var(--space-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.radio-card:hover {
    border-color: var(--color-primary-light);
    background: var(--color-bg-secondary);
}

.radio-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.radio-card:focus-within {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.radio-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.radio-card-title {
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.radio-card-description {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

/* ===== Sliders ===== */
.form-slider-group {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.form-slider {
    flex: 1;
    height: 32px;
    background: transparent;
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    margin: 0;
    padding: 0;
    touch-action: none;
}

.form-slider:focus {
    outline: none;
}

.form-slider:focus-visible::-webkit-slider-thumb {
    box-shadow: 0 0 0 4px var(--color-primary-light, rgba(37, 99, 235, 0.3));
}

.form-slider:focus-visible::-moz-range-thumb {
    box-shadow: 0 0 0 4px var(--color-primary-light, rgba(37, 99, 235, 0.3));
}

/*
 * Track is set to full 32px height (transparent) so the ENTIRE slider
 * height is clickable. The visible "rail" is drawn as an inset box-shadow
 * on the track, keeping the hit area much larger than what the user sees.
 */
.form-slider::-webkit-slider-runnable-track {
    height: 32px;
    background: transparent;
    border-radius: 6px;
    border: none;
    box-shadow: inset 0 0 0 0 transparent, 0 0 0 0 transparent;
    background-image: linear-gradient(
        to bottom,
        transparent 10px,
        var(--color-bg-tertiary) 10px,
        var(--color-bg-tertiary) 22px,
        transparent 22px
    );
}

.form-slider::-moz-range-track {
    height: 32px;
    background: transparent;
    border-radius: 6px;
    border: none;
    background-image: linear-gradient(
        to bottom,
        transparent 10px,
        var(--color-bg-tertiary) 10px,
        var(--color-bg-tertiary) 22px,
        transparent 22px
    );
}

.form-slider::-moz-range-progress {
    height: 32px;
    background: transparent;
    border-radius: 6px 0 0 6px;
    background-image: linear-gradient(
        to bottom,
        transparent 10px,
        var(--color-primary) 10px,
        var(--color-primary) 22px,
        transparent 22px
    );
    opacity: 0.3;
}

.form-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    cursor: grab;
    margin-top: 0;
    transition: transform var(--transition-fast);
}

.form-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.form-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.form-slider::-moz-range-thumb {
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    border: 3px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    border-radius: 50%;
    cursor: grab;
}

.form-slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}

.form-slider::-moz-range-thumb:active {
    cursor: grabbing;
    transform: scale(1.15);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.slider-value {
    min-width: 60px;
    text-align: center;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

/* ===== Help Text ===== */
.form-help {
    margin-top: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

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

/* ===== Tooltips ===== */
.tooltip-wrapper {
    position: relative;
    display: inline-block;
}

.tooltip-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: help;
    transition: all var(--transition-fast);
}

.tooltip-trigger:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tooltip-content {
    display: none;
    position: absolute;
    left: 0;
    top: calc(100% + var(--space-2));
    z-index: var(--z-dropdown);
    max-width: min(300px, 90vw);
    padding: var(--space-4);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.tooltip-wrapper.active .tooltip-content {
    display: block;
}

.tooltip-brief {
    font-size: var(--text-sm);
    margin-bottom: var(--space-2);
}

.tooltip-context {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.tooltip-expand {
    display: inline-block;
    margin-top: var(--space-2);
    padding: 0;
    background: none;
    border: none;
    font-size: var(--text-xs);
    color: var(--color-primary);
    cursor: pointer;
}

.tooltip-expand:hover {
    text-decoration: underline;
}

.tooltip-detailed {
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-xs);
}

.tooltip-detailed ul {
    margin-left: var(--space-4);
}

.tooltip-detailed li {
    margin-bottom: var(--space-1);
}

/* ===== Dynamic Lists ===== */
.dynamic-list {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.dynamic-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.dynamic-list-title {
    font-weight: 500;
    font-size: var(--text-sm);
}

.dynamic-list-items {
    /* Items container */
}

.dynamic-list-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.dynamic-list-item:last-child {
    border-bottom: none;
}

.dynamic-list-item-content {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 100px;
    gap: var(--space-3);
    align-items: center;
}

.dynamic-list-item-remove {
    flex-shrink: 0;
}

.dynamic-list-empty {
    padding: var(--space-8) var(--space-4);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

.dynamic-list-footer {
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.dynamic-list-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
}

.total-label {
    font-weight: 500;
}

.total-value {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.total-value.valid {
    color: var(--color-success);
}

.total-value.invalid {
    color: var(--color-error);
}

/* ===== Validation States ===== */
.field-valid .form-input,
.field-valid .form-select {
    border-color: var(--color-success);
}

.field-error .form-input,
.field-error .form-select {
    border-color: var(--color-error);
}

.validation-icon {
    margin-left: var(--space-2);
}

.validation-icon.valid {
    color: var(--color-success);
}

.validation-icon.error {
    color: var(--color-error);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .radio-group-cards {
        grid-template-columns: 1fr;
    }
    
    .tooltip-content {
        width: calc(100vw - var(--space-8));
        max-width: 300px;
    }
    
    .dynamic-list-item-content {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }
}