/**
 * MODERN FORM COMPONENTS
 * Beautiful form controls với floating labels, icons, và validation states
 * Created: 2026-03-06
 */

/* ============================================
   BASE FORM CONTROLS
   ============================================ */
.form-control,
.form-select {
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: var(--color-white);
    color: var(--color-text);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

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

.form-control::placeholder {
    color: var(--color-gray-400);
}

/* ============================================
   FLOATING LABELS
   ============================================ */
.form-floating {
    position: relative;
}

.form-floating > .form-control,
.form-floating > .form-select {
    padding: var(--spacing-4) var(--spacing-4) var(--spacing-3);
    height: calc(3.5rem + 2px);
}

.form-floating > 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: all var(--transition-fast);
    color: var(--color-gray-500);
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label,
.form-floating > .form-select ~ label {
    opacity: 0.65;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
    background: var(--color-white);
    padding: 0 var(--spacing-2);
    color: var(--color-primary);
}

/* ============================================
   INPUT WITH ICONS
   ============================================ */
.form-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.form-icon-wrapper .form-icon {
    position: absolute;
    left: var(--spacing-4);
    color: var(--color-gray-400);
    font-size: var(--font-size-lg);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.form-icon-wrapper .form-control {
    padding-left: calc(var(--spacing-4) + var(--spacing-8));
}

.form-icon-wrapper .form-control:focus ~ .form-icon {
    color: var(--color-primary);
}

/* Icon on right side */
.form-icon-wrapper.icon-right .form-icon {
    left: auto;
    right: var(--spacing-4);
}

.form-icon-wrapper.icon-right .form-control {
    padding-left: var(--spacing-4);
    padding-right: calc(var(--spacing-4) + var(--spacing-8));
}

/* ============================================
   VALIDATION STATES
   ============================================ */
.form-control.is-valid,
.form-select.is-valid {
    border-color: var(--color-success);
    background-image: none;
}

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

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--color-danger);
    background-image: none;
}

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

.valid-feedback {
    display: block;
    color: var(--color-success);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
}

.invalid-feedback {
    display: block;
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
}

/* ============================================
   CUSTOM CHECKBOXES & RADIOS
   ============================================ */
.form-check {
    display: flex;
    align-items: center;
    padding-left: 0;
    margin-bottom: var(--spacing-3);
}

.form-check-input {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-3);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    background-color: var(--color-white);
}

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

.form-check-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

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

.form-check-label {
    cursor: pointer;
    user-select: none;
    color: var(--color-text);
    font-size: var(--font-size-base);
}

/* Custom checkbox with animation */
.form-check-input[type="checkbox"] {
    position: relative;
}

.form-check-input[type="checkbox"]:checked::after {
    content: '\2713';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

/* ============================================
   SWITCH TOGGLE
   ============================================ */
.form-switch .form-check-input {
    width: 44px;
    height: 24px;
    border-radius: var(--radius-full);
    position: relative;
    background-color: var(--color-gray-300);
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.form-switch .form-check-input::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.form-switch .form-check-input:checked {
    background-color: var(--color-primary);
}

.form-switch .form-check-input:checked::after {
    transform: translateX(20px);
}

/* ============================================
   INPUT GROUPS
   ============================================ */
.input-group {
    display: flex;
    align-items: stretch;
    width: 100%;
}

.input-group .form-control {
    border-radius: 0;
    flex: 1;
}

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

.input-group .form-control:last-child {
    border-top-right-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    background-color: var(--color-gray-100);
    border: 2px solid var(--color-gray-200);
    border-radius: 0;
}

.input-group-text:first-child {
    border-top-left-radius: var(--radius-lg);
    border-bottom-left-radius: var(--radius-lg);
    border-right: none;
}

.input-group-text:last-child {
    border-top-right-radius: var(--radius-lg);
    border-bottom-right-radius: var(--radius-lg);
    border-left: none;
}

/* ============================================
   FILE INPUT
   ============================================ */
.form-control[type="file"] {
    padding: var(--spacing-3);
}

.form-control[type="file"]::file-selector-button {
    padding: var(--spacing-2) var(--spacing-4);
    margin-right: var(--spacing-3);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: background-color var(--transition-fast);
}

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

/* ============================================
   TEXTAREA
   ============================================ */
textarea.form-control {
    min-height: 100px;
    resize: vertical;
    line-height: 1.5;
}

textarea.form-control::-webkit-scrollbar {
    width: 8px;
}

textarea.form-control::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
}

textarea.form-control::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: var(--radius-md);
}

textarea.form-control::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* ============================================
   SEARCH INPUT
   ============================================ */
.form-search {
    position: relative;
}

.form-search .form-control {
    padding-left: calc(var(--spacing-4) + var(--spacing-8));
    border-radius: var(--radius-full);
}

.form-search .search-icon {
    position: absolute;
    left: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    pointer-events: none;
}

.form-search .clear-search {
    position: absolute;
    right: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--spacing-2);
    display: none;
}

.form-search .form-control:not(:placeholder-shown) ~ .clear-search {
    display: block;
}

/* ============================================
   FORM SIZES
   ============================================ */
.form-control-sm,
.form-select-sm {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
}

.form-control-lg,
.form-select-lg {
    padding: var(--spacing-4) var(--spacing-5);
    font-size: var(--font-size-lg);
    border-radius: var(--radius-xl);
}

/* ============================================
   PASSWORD TOGGLE
   ============================================ */
.password-toggle {
    position: relative;
}

.password-toggle .form-control {
    padding-right: calc(var(--spacing-4) + var(--spacing-8));
}

.password-toggle .toggle-icon {
    position: absolute;
    right: var(--spacing-4);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--spacing-2);
    font-size: var(--font-size-lg);
}

.password-toggle .toggle-icon:hover {
    color: var(--color-primary);
}

/* ============================================
   FORM LABELS
   ============================================ */
.form-label {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-2);
    display: block;
}

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

/* ============================================
   FORM LAYOUTS
   ============================================ */
.form-row {
    display: flex;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.form-row .form-group {
    flex: 1;
}

/* ============================================
   DISABLED STATE
   ============================================ */
.form-control:disabled,
.form-select:disabled {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-200);
    cursor: not-allowed;
    opacity: 0.6;
}

/* ============================================
   READONLY STATE
   ============================================ */
.form-control:read-only {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-200);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: var(--spacing-3);
    }

    .form-control,
    .form-select {
        font-size: 16px; /* Prevent zoom on iOS */
    }
}

/* ============================================
   DARK MODE SUPPORT
   ============================================ */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-tertiary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background: var(--bg-primary);
    border-color: var(--color-primary);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:disabled,
[data-theme="dark"] .form-control:read-only {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .form-floating label,
[data-theme="dark"] .form-label {
    color: var(--text-secondary);
}

[data-theme="dark"] .form-floating .form-control:focus ~ label,
[data-theme="dark"] .form-floating .form-control:not(:placeholder-shown) ~ label {
    background: var(--bg-primary);
    color: var(--color-primary);
}

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

[data-theme="dark"] .form-check-label {
    color: var(--text-primary);
}

[data-theme="dark"] .input-group-text {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .form-icon {
    color: var(--text-tertiary);
}

[data-theme="dark"] .form-text {
    color: var(--text-tertiary);
}

[data-theme="dark"] textarea.form-control::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}