/**
 * ============================================================================
 * Aitech Forms CSS
 * ============================================================================
 * Version: 1.0.0
 * Date: 23 Feb 2026
 * Branch: restyling
 *
 * Modern form components using Design System variables
 * ============================================================================
 */

/* ============================================================================
   FORM CONTAINER
   ============================================================================ */

.form-modern {
    width: 100%;
}

.form-group-modern {
    margin-bottom: var(--spacing-6);
}

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

/* ============================================================================
   LABELS
   ============================================================================ */

.form-label-modern {
    display: block;
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
    line-height: var(--line-height-normal);
}

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

.form-label-modern .optional {
    font-weight: var(--font-weight-normal);
    color: var(--color-text-tertiary);
    font-size: var(--font-size-xs);
    margin-left: var(--spacing-1);
}

/* ============================================================================
   TEXT INPUTS
   ============================================================================ */

.form-control-modern {
    display: block;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-white);
    background-clip: padding-box;
    border: 2px solid var(--color-secondary-300);
    border-radius: var(--radius-base);
    transition: var(--transition-base);
    appearance: none;
}

.form-control-modern::placeholder {
    color: var(--color-text-tertiary);
    opacity: 1;
}

.form-control-modern:hover {
    border-color: var(--color-secondary-400);
}

.form-control-modern:focus {
    border-color: var(--color-primary-500);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(62, 205, 255, 0.1);
}

.form-control-modern:disabled,
.form-control-modern[readonly] {
    background-color: var(--color-secondary-100);
    opacity: 0.7;
    cursor: not-allowed;
}

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

/* File Input */
.form-control-modern[type="file"] {
    padding: var(--spacing-2) var(--spacing-4);
}

.form-control-modern[type="file"]::file-selector-button {
    padding: var(--spacing-2) var(--spacing-4);
    margin-right: var(--spacing-3);
    background-color: var(--color-secondary-100);
    color: var(--color-text-primary);
    border: 1px solid var(--color-secondary-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: var(--transition-base);
}

.form-control-modern[type="file"]::file-selector-button:hover {
    background-color: var(--color-secondary-200);
}

/* ============================================================================
   SELECT DROPDOWN
   ============================================================================ */

.form-select-modern {
    display: block;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    padding-right: var(--spacing-10);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-white);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2364748b' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--spacing-4) center;
    background-size: 16px 12px;
    border: 2px solid var(--color-secondary-300);
    border-radius: var(--radius-base);
    transition: var(--transition-base);
    appearance: none;
}

.form-select-modern:hover {
    border-color: var(--color-secondary-400);
}

.form-select-modern:focus {
    border-color: var(--color-primary-500);
    outline: 0;
    box-shadow: 0 0 0 3px rgba(62, 205, 255, 0.1);
}

.form-select-modern:disabled {
    background-color: var(--color-secondary-100);
    opacity: 0.7;
    cursor: not-allowed;
}

/* ============================================================================
   CHECKBOX & RADIO
   ============================================================================ */

.form-check-modern {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
}

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

.form-check-input-modern {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
    background-color: var(--color-white);
    border: 2px solid var(--color-secondary-300);
    border-radius: var(--radius-sm);
    appearance: none;
    cursor: pointer;
    transition: var(--transition-base);
}

.form-check-input-modern[type="radio"] {
    border-radius: var(--radius-full);
}

.form-check-input-modern:hover {
    border-color: var(--color-primary-500);
}

.form-check-input-modern:checked {
    background-color: var(--color-primary-500);
    border-color: var(--color-primary-500);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100% 100%;
}

.form-check-input-modern[type="radio"]:checked {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='2' fill='%23fff'/%3e%3c/svg%3e");
}

.form-check-input-modern:focus {
    outline: 0;
    box-shadow: 0 0 0 3px rgba(62, 205, 255, 0.1);
}

.form-check-input-modern:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-check-label-modern {
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
}

.form-check-input-modern:disabled ~ .form-check-label-modern {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================================================
   VALIDATION STATES
   ============================================================================ */

/* Success State */
.form-control-modern.is-valid,
.form-select-modern.is-valid {
    border-color: var(--color-success);
    padding-right: calc(1.5em + var(--spacing-4));
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2310b981' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(.375em + var(--spacing-3)) center;
    background-size: calc(.75em + var(--spacing-2)) calc(.75em + var(--spacing-2));
}

.form-control-modern.is-valid:focus,
.form-select-modern.is-valid:focus {
    border-color: var(--color-success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-check-input-modern.is-valid {
    border-color: var(--color-success);
}

.form-check-input-modern.is-valid:checked {
    background-color: var(--color-success);
    border-color: var(--color-success);
}

/* Error State */
.form-control-modern.is-invalid,
.form-select-modern.is-invalid {
    border-color: var(--color-error);
    padding-right: calc(1.5em + var(--spacing-4));
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23ef4444'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23ef4444' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(.375em + var(--spacing-3)) center;
    background-size: calc(.75em + var(--spacing-2)) calc(.75em + var(--spacing-2));
}

.form-control-modern.is-invalid:focus,
.form-select-modern.is-invalid:focus {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-check-input-modern.is-invalid {
    border-color: var(--color-error);
}

.form-check-input-modern.is-invalid:checked {
    background-color: var(--color-error);
    border-color: var(--color-error);
}

/* ============================================================================
   FEEDBACK TEXT
   ============================================================================ */

.form-feedback {
    display: block;
    margin-top: var(--spacing-2);
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
}

.form-feedback.valid-feedback {
    color: var(--color-success);
}

.form-feedback.invalid-feedback {
    color: var(--color-error);
}

.form-text-modern {
    display: block;
    margin-top: var(--spacing-2);
    font-family: var(--font-primary);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    line-height: var(--line-height-normal);
}

/* ============================================================================
   INPUT GROUPS
   ============================================================================ */

.input-group-modern {
    display: flex;
    width: 100%;
}

.input-group-modern > .form-control-modern,
.input-group-modern > .form-select-modern {
    flex: 1 1 auto;
    width: 1%;
    min-width: 0;
}

.input-group-modern > .form-control-modern:not(:last-child),
.input-group-modern > .form-select-modern:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-modern > .form-control-modern:not(:first-child),
.input-group-modern > .form-select-modern:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.input-group-text-modern {
    display: flex;
    align-items: center;
    padding: var(--spacing-3) var(--spacing-4);
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    text-align: center;
    white-space: nowrap;
    background-color: var(--color-secondary-100);
    border: 2px solid var(--color-secondary-300);
    border-radius: var(--radius-base);
}

.input-group-text-modern:not(:last-child) {
    border-right: 0;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-text-modern:not(:first-child) {
    border-left: 0;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* ============================================================================
   FORM GRID
   ============================================================================ */

.form-row-modern {
    display: grid;
    gap: var(--spacing-6);
}

.form-row-modern.cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.form-row-modern.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ============================================================================
   SEARCH INPUT
   ============================================================================ */

.form-search-modern {
    position: relative;
}

.form-search-modern .form-control-modern {
    padding-left: var(--spacing-10);
}

.form-search-modern::before {
    content: '';
    position: absolute;
    left: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='%2364748b' d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    pointer-events: none;
}

/* ============================================================================
   FLOATING LABELS
   ============================================================================ */

.form-floating-modern {
    position: relative;
}

.form-floating-modern > .form-control-modern {
    padding: var(--spacing-4) var(--spacing-4) var(--spacing-2) var(--spacing-4);
}

.form-floating-modern > label {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    padding: var(--spacing-4);
    pointer-events: none;
    border: 2px solid transparent;
    transform-origin: 0 0;
    transition: var(--transition-base);
    color: var(--color-text-tertiary);
}

.form-floating-modern > .form-control-modern:focus ~ label,
.form-floating-modern > .form-control-modern:not(:placeholder-shown) ~ label {
    opacity: 0.65;
    transform: scale(.85) translateY(-0.5rem) translateX(0.15rem);
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    .form-row-modern.cols-2,
    .form-row-modern.cols-3 {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   DARK MODE
   ============================================================================ */

@media (prefers-color-scheme: dark) {
    .form-control-modern,
    .form-select-modern {
        background-color: var(--color-bg-secondary);
        border-color: var(--color-border-primary);
        color: var(--color-text-primary);
    }

    .form-control-modern:focus,
    .form-select-modern:focus {
        border-color: var(--color-primary-300);
    }

    .form-check-input-modern {
        background-color: var(--color-bg-secondary);
        border-color: var(--color-border-primary);
    }

    .input-group-text-modern {
        background-color: var(--color-bg-secondary);
        border-color: var(--color-border-primary);
        color: var(--color-text-primary);
    }
}