/* ==========================================================================
   KAMEU New - UI Components
   Buttons, Forms, Alerts, Badges, Modals
   ========================================================================== */

/* ── Buttons ── */
.kn-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--kn-space-2);
    padding: var(--kn-space-3) var(--kn-space-6);
    border: 2px solid transparent;
    border-radius: var(--kn-radius-md);
    font-family: var(--kn-font-body);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-semibold);
    line-height: 1.4;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--kn-transition-fast);
    white-space: nowrap;
}

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

.kn-btn--primary:hover {
    background: var(--kn-secondary-dark);
    border-color: var(--kn-secondary-dark);
    color: var(--kn-white);
}

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

.kn-btn--secondary:hover {
    background: var(--kn-primary-dark);
    border-color: var(--kn-primary-dark);
    color: var(--kn-white);
}

.kn-btn--outline {
    background: transparent;
    color: var(--kn-secondary);
    border-color: var(--kn-secondary);
}

.kn-btn--outline:hover {
    background: var(--kn-secondary);
    color: var(--kn-white);
}

.kn-btn--white {
    background: var(--kn-white);
    color: var(--kn-gray-800);
    border-color: var(--kn-white);
}

.kn-btn--white:hover {
    background: var(--kn-gray-100);
    color: var(--kn-gray-800);
}

.kn-btn--ghost {
    background: transparent;
    color: var(--kn-gray-600);
    border-color: transparent;
}

.kn-btn--ghost:hover {
    background: var(--kn-gray-100);
    color: var(--kn-gray-800);
}

.kn-btn--success {
    background: var(--kn-accent);
    color: var(--kn-white);
    border-color: var(--kn-accent);
}

.kn-btn--sm {
    padding: var(--kn-space-2) var(--kn-space-4);
    font-size: var(--kn-text-xs);
}

.kn-btn--lg {
    padding: var(--kn-space-4) var(--kn-space-8);
    font-size: var(--kn-text-base);
}

.kn-btn--icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--kn-radius-full);
}

/* ── Forms ── */
.kn-input,
.kn-select,
.kn-textarea {
    width: 100%;
    padding: var(--kn-space-3) var(--kn-space-4);
    border: 1px solid var(--kn-gray-200);
    border-radius: var(--kn-radius-md);
    font-family: var(--kn-font-body);
    font-size: var(--kn-text-sm);
    color: var(--kn-gray-800);
    background: var(--kn-white);
    outline: none;
    transition: border-color var(--kn-transition-fast), box-shadow var(--kn-transition-fast);
}

.kn-input:focus,
.kn-select:focus,
.kn-textarea:focus {
    border-color: var(--kn-secondary);
    box-shadow: 0 0 0 3px rgba(200, 149, 46, 0.1);
}

.kn-input::placeholder {
    color: var(--kn-gray-400);
}

.kn-label {
    display: block;
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
    color: var(--kn-gray-700);
    margin-bottom: var(--kn-space-2);
}

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

/* Quantity Input */
.kn-quantity {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--kn-gray-200);
    border-radius: var(--kn-radius-md);
    overflow: hidden;
}

.kn-quantity__btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--kn-gray-50);
    color: var(--kn-gray-600);
    cursor: pointer;
    transition: background var(--kn-transition-fast);
}

.kn-quantity__btn:hover {
    background: var(--kn-gray-100);
}

.kn-quantity__input {
    width: 50px;
    height: 36px;
    text-align: center;
    border: none;
    border-left: 1px solid var(--kn-gray-200);
    border-right: 1px solid var(--kn-gray-200);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
    outline: none;
}

/* ── Alerts ── */
.kn-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--kn-space-3);
    padding: var(--kn-space-4);
    border-radius: var(--kn-radius-md);
    font-size: var(--kn-text-sm);
    border: 1px solid;
}

.kn-alert--success { background: #f0fff4; border-color: #c6f6d5; color: #276749; }
.kn-alert--warning { background: #fffbeb; border-color: #fef3c7; color: #92400e; }
.kn-alert--error   { background: #fff5f5; border-color: #fed7d7; color: #9b2c2c; }
.kn-alert--info    { background: #ebf8ff; border-color: #bee3f8; color: #2b6cb0; }

/* ── Modal ── */
.kn-modal {
    position: fixed;
    inset: 0;
    z-index: var(--kn-z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--kn-space-6);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--kn-transition), visibility var(--kn-transition);
}

.kn-modal.is-open {
    opacity: 1;
    visibility: visible;
}

.kn-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.kn-modal__content {
    position: relative;
    background: var(--kn-white);
    border-radius: var(--kn-radius-xl);
    box-shadow: var(--kn-shadow-2xl);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--kn-transition);
}

.kn-modal.is-open .kn-modal__content {
    transform: scale(1) translateY(0);
}

.kn-modal__close {
    position: absolute;
    top: var(--kn-space-4);
    right: var(--kn-space-4);
    width: 36px;
    height: 36px;
    border-radius: var(--kn-radius-full);
    background: var(--kn-gray-100);
    color: var(--kn-gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--kn-transition-fast);
}

.kn-modal__close:hover {
    background: var(--kn-secondary);
    color: var(--kn-white);
}

/* ── Loading Spinner ── */
.kn-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--kn-gray-200);
    border-top-color: var(--kn-secondary);
    border-radius: var(--kn-radius-full);
    animation: kn-spin 600ms linear infinite;
}

@keyframes kn-spin {
    to { transform: rotate(360deg); }
}

/* ── Mini-Cart Loader ── */
.kn-mini-cart__loader {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.kn-mini-cart__loader[hidden] {
    display: none;
}

/* ── Focus States (Accessibility) ── */
:focus-visible {
    outline: 2px solid var(--kn-secondary);
    outline-offset: 2px;
}

.kn-btn:focus-visible,
.kn-input:focus-visible,
.kn-select:focus-visible,
.kn-textarea:focus-visible {
    box-shadow: 0 0 0 3px rgba(200, 149, 46, 0.2);
}

/* Screen Reader Only */
.sr-only,
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.screen-reader-text:focus {
    position: static;
    width: auto;
    height: auto;
    padding: var(--kn-space-2) var(--kn-space-4);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--kn-secondary);
    color: var(--kn-white);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-bold);
    z-index: 999;
}

/* ── Shipping Progress Bar ── */
.kn-shipping-bar {
    background: var(--kn-accent);
    color: var(--kn-white);
    padding: var(--kn-space-2) var(--kn-space-4);
    text-align: center;
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
}

.kn-shipping-bar__progress {
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--kn-radius-full);
    margin-top: var(--kn-space-2);
    overflow: hidden;
}

.kn-shipping-bar__fill {
    height: 100%;
    background: var(--kn-white);
    border-radius: var(--kn-radius-full);
    transition: width 500ms var(--kn-ease);
}

/* ── Toast Notifications ── */
.kn-toast {
    position: fixed;
    bottom: var(--kn-space-6);
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--kn-gray-800);
    color: var(--kn-gray-50);
    padding: var(--kn-space-3) var(--kn-space-6);
    border-radius: var(--kn-radius-full);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
    box-shadow: var(--kn-shadow-lg);
    z-index: var(--kn-z-toast);
    opacity: 0;
    transition: opacity 300ms var(--kn-ease), transform 300ms var(--kn-ease);
    pointer-events: none;
    white-space: nowrap;
}

.kn-toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ── Wishlist/Compare Active State ── */
.kn-product-card__action-btn.is-active {
    background: var(--kn-secondary);
    color: var(--kn-white);
}

.kn-product-card__action-btn.is-active svg {
    stroke: var(--kn-white);
}

[data-action="wishlist"].is-active svg {
    fill: var(--kn-white);
}

/* ── Price Negotiation ── */
.kn-negotiate {
    margin-top: var(--kn-space-3);
    border: 1px dashed var(--kn-gray-200);
    border-radius: var(--kn-radius-md);
    overflow: hidden;
}

.kn-negotiate__toggle {
    display: flex;
    align-items: center;
    gap: var(--kn-space-2);
    width: 100%;
    padding: var(--kn-space-3) var(--kn-space-4);
    background: var(--kn-gray-50);
    border: none;
    font-family: var(--kn-font-body);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-semibold);
    color: var(--kn-gray-600);
    cursor: pointer;
    transition: all var(--kn-transition-fast);
}

.kn-negotiate__toggle:hover {
    background: var(--kn-gray-100);
    color: var(--kn-gray-800);
}

.kn-negotiate__toggle svg:first-child {
    color: var(--kn-secondary);
}

.kn-negotiate__chevron {
    margin-left: auto;
    transition: transform 0.2s;
}

.kn-negotiate__toggle.is-open .kn-negotiate__chevron {
    transform: rotate(180deg);
}

.kn-negotiate__body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 var(--kn-space-4);
}

.kn-negotiate__body.is-open {
    max-height: 300px;
    padding: var(--kn-space-4);
    border-top: 1px solid var(--kn-gray-100);
}

.kn-negotiate__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--kn-space-2);
}

.kn-negotiate__label {
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-medium);
    color: var(--kn-gray-600);
}

.kn-negotiate__original {
    font-size: var(--kn-text-sm);
    color: var(--kn-gray-400);
    text-decoration: line-through;
}

.kn-negotiate__input-wrap {
    display: flex;
    align-items: center;
    border: 1px solid var(--kn-gray-200);
    border-radius: var(--kn-radius-md);
    overflow: hidden;
    transition: border-color var(--kn-transition-fast), box-shadow var(--kn-transition-fast);
}

.kn-negotiate__input-wrap:focus-within {
    border-color: var(--kn-secondary);
    box-shadow: 0 0 0 3px rgba(200, 149, 46, 0.1);
}

.kn-negotiate__input {
    flex: 1;
    height: 40px;
    padding: 0 var(--kn-space-3);
    border: none;
    font-family: var(--kn-font-body);
    font-size: var(--kn-text-base);
    font-weight: var(--kn-weight-bold);
    color: var(--kn-gray-800);
    outline: none;
    -moz-appearance: textfield;
}

.kn-negotiate__input::-webkit-outer-spin-button,
.kn-negotiate__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.kn-negotiate__input::placeholder {
    color: var(--kn-gray-300);
    font-weight: var(--kn-weight-normal);
}

.kn-negotiate__currency {
    padding: 0 var(--kn-space-3);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-bold);
    color: var(--kn-gray-400);
    background: var(--kn-gray-50);
    border-left: 1px solid var(--kn-gray-200);
    line-height: 40px;
    white-space: nowrap;
    user-select: none;
}

.kn-negotiate__discount {
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-bold);
    color: var(--kn-accent);
    margin-top: var(--kn-space-2);
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.2s, transform 0.2s;
}

.kn-negotiate__discount.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.kn-negotiate__hint {
    font-size: var(--kn-text-xs);
    color: var(--kn-gray-400);
    margin-top: var(--kn-space-2);
    margin-bottom: 0;
}

/* ── Delivery Zones ── */
.kn-delivery-zones {
    border: 1px solid var(--kn-gray-100);
    border-radius: var(--kn-radius-md);
    padding: var(--kn-space-4);
    background: var(--kn-white);
}

.kn-delivery-zones__title {
    display: flex;
    align-items: center;
    gap: var(--kn-space-2);
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-bold);
    margin-bottom: var(--kn-space-3);
    padding-bottom: var(--kn-space-3);
    border-bottom: 1px solid var(--kn-gray-100);
    color: var(--kn-gray-800);
}

.kn-delivery-zones__title svg {
    color: var(--kn-accent);
}

.kn-delivery-zones__list {
    display: flex;
    flex-direction: column;
    gap: var(--kn-space-2);
}

.kn-delivery-zone {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: var(--kn-space-2) var(--kn-space-3);
    border-radius: var(--kn-radius-sm);
    transition: background var(--kn-transition-fast);
}

.kn-delivery-zone:hover {
    background: var(--kn-gray-50);
}

.kn-delivery-zone__header {
    display: flex;
    align-items: center;
    gap: var(--kn-space-2);
}

.kn-delivery-zone__header svg {
    color: var(--kn-gray-400);
    flex-shrink: 0;
}

.kn-delivery-zone__city {
    font-size: var(--kn-text-sm);
    font-weight: var(--kn-weight-semibold);
    flex: 1;
}

.kn-delivery-zone__badge {
    font-size: 10px;
    font-weight: var(--kn-weight-bold);
    padding: 2px 8px;
    border-radius: var(--kn-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.kn-delivery-zone__badge--fast {
    background: #dcfce7;
    color: #166534;
}

.kn-delivery-zone__badge--medium {
    background: #fef9c3;
    color: #854d0e;
}

.kn-delivery-zone__badge--slow {
    background: var(--kn-gray-100);
    color: var(--kn-gray-600);
}

.kn-delivery-zone__badge--free {
    background: #dbeafe;
    color: #1e40af;
}

.kn-delivery-zone__details {
    display: flex;
    align-items: center;
    gap: var(--kn-space-2);
    padding-left: 22px;
    flex-wrap: wrap;
}

.kn-delivery-zone__price {
    font-size: var(--kn-text-xs);
    color: var(--kn-gray-600);
}

.kn-delivery-zone__free {
    font-size: 10px;
    color: var(--kn-in-stock);
    font-weight: var(--kn-weight-medium);
}

.kn-delivery-zone__address {
    font-size: var(--kn-text-xs);
    color: var(--kn-gray-500);
}