/* ==========================================================================
   Responsive Styles — Tablet & Mobile
   ========================================================================== */

/* Large Desktop: 1440px+ */
@media (min-width: 1440px) {
    .kb-container {
        max-width: 1320px;
    }
}

/* Desktop: 1200px — 1439px */
@media (max-width: 1439px) {
    .kb-hero__title {
        font-size: 3rem;
    }
}

/* Tablet Landscape: 1024px — 1199px */
@media (max-width: 1199px) {
    .kb-container {
        padding: 0 30px;
    }

    .kb-nav__menu > li > a {
        padding: 30px 14px;
        font-size: 0.9rem;
    }

    .kb-products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .kb-advantages {
        grid-template-columns: repeat(2, 1fr);
    }

    .kb-applications {
        grid-template-columns: repeat(2, 1fr);
    }

    .kb-news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .kb-footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .kb-product-detail {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .kb-about-content__grid {
        grid-template-columns: 1fr;
    }

    .kb-process {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablet Portrait: 768px — 1023px */
@media (max-width: 1023px) {
    /* Hide desktop nav, show mobile toggle */
    .kb-nav {
        display: none;
    }

    .kb-mobile-toggle {
        display: flex;
    }

    /* Mobile menu */
    .kb-mobile-menu {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--kb-white);
        box-shadow: var(--kb-shadow-lg);
        padding: 20px 0;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
        z-index: 999;
    }

    .kb-mobile-menu.active {
        display: block;
    }

    .kb-mobile-menu__list {
        list-style: none;
    }

    .kb-mobile-menu__list > li > a {
        display: block;
        padding: 14px 20px;
        font-size: 1rem;
        font-weight: 600;
        color: var(--kb-gray-700);
        border-bottom: 1px solid var(--kb-gray-100);
    }

    .kb-mobile-menu__list > li > a:hover {
        background: var(--kb-gray-50);
        color: var(--kb-primary);
    }

    .kb-mobile-menu .sub-menu {
        display: none;
        padding-left: 20px;
    }

    .kb-mobile-menu__lang {
        padding: 15px 20px;
        border-top: 1px solid var(--kb-gray-100);
        margin-top: 10px;
    }

    .kb-products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .kb-page-layout {
        grid-template-columns: 1fr;
    }

    .kb-sidebar {
        position: static;
    }

    .kb-hero__title {
        font-size: 2.5rem;
    }

    .kb-hero__subtitle {
        font-size: 1.1rem;
    }

    .kb-section {
        padding: 60px 0;
    }

    .kb-section-title {
        font-size: 1.7rem;
    }
}

/* Mobile: 480px — 767px */
@media (max-width: 767px) {
    .kb-container {
        padding: 0 16px;
    }

    .kb-header__inner {
        height: 65px;
    }

    .kb-header__logo-text {
        font-size: 1rem;
    }

    .kb-header__logo-text small {
        font-size: 0.6rem;
    }

    .kb-header__logo img {
        max-height: 40px;
    }

    .kb-mobile-menu {
        top: 65px;
    }

    .kb-hero {
        height: 80vh;
        min-height: 500px;
    }

    .kb-hero__title {
        font-size: 2rem;
        line-height: 1.3;
    }

    .kb-hero__subtitle {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .kb-hero__actions {
        flex-direction: column;
        gap: 12px;
    }

    .kb-hero__arrow {
        display: none;
    }

    .kb-hero__dot {
        width: 10px;
        height: 10px;
    }

    .kb-hero__dot.active {
        width: 28px;
    }

    .kb-products-grid,
    .kb-advantages,
    .kb-applications,
    .kb-news-grid {
        grid-template-columns: 1fr;
    }

    .kb-grid--2,
    .kb-grid--3,
    .kb-grid--4 {
        grid-template-columns: 1fr;
    }

    .kb-section {
        padding: 45px 0;
    }

    .kb-section-title {
        font-size: 1.5rem;
    }

    .kb-section-subtitle {
        font-size: 0.9rem;
        margin-bottom: 35px;
    }

    .kb-product-card__image {
        height: 220px;
    }

    .kb-advantage {
        padding: 30px 15px;
    }

    .kb-advantage__icon {
        width: 65px;
        height: 65px;
        font-size: 1.6rem;
    }

    .kb-advantage__number {
        font-size: 2rem;
    }

    .kb-application-card {
        height: 250px;
    }

    .kb-footer__grid {
        grid-template-columns: 1fr;
        gap: 30px;
        padding-bottom: 40px;
    }

    .kb-footer__bottom {
        font-size: 0.8rem;
    }

    .kb-breadcrumb {
        padding: 15px 0;
    }

    .kb-breadcrumb ul {
        flex-wrap: wrap;
        font-size: 0.8rem;
    }

    .kb-product-detail {
        gap: 25px;
    }

    .kb-product-info__title {
        font-size: 1.5rem;
    }

    .kb-spec-table th,
    .kb-spec-table td {
        padding: 10px 12px;
        font-size: 0.85rem;
    }

    .kb-inquiry-form {
        padding: 25px 20px;
    }

    .kb-inquiry-form h3 {
        font-size: 1.3rem;
    }

    .kb-about-hero {
        height: 300px;
    }

    .kb-about-hero__title {
        font-size: 2rem;
    }

    .kb-process {
        grid-template-columns: 1fr;
    }

    .kb-404__code {
        font-size: 5rem;
    }

    .kb-btn--lg {
        padding: 14px 28px;
        font-size: 0.95rem;
    }

    .kb-post-nav {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .kb-post-nav > div:last-child {
        text-align: left;
    }

    .kb-pagination a,
    .kb-pagination span {
        min-width: 38px;
        height: 38px;
        font-size: 0.85rem;
    }
}

/* Small Mobile: < 480px */
@media (max-width: 479px) {
    .kb-hero__title {
        font-size: 1.6rem;
    }

    .kb-hero__subtitle {
        font-size: 0.85rem;
    }

    .kb-section-title {
        font-size: 1.3rem;
    }

    .kb-product-card__image {
        height: 200px;
    }

    .kb-btn {
        padding: 10px 24px;
        font-size: 0.85rem;
    }

    .kb-btn--lg {
        width: 100%;
        justify-content: center;
    }

    .kb-footer__bottom p {
        font-size: 0.75rem;
    }

    .kb-news-card__body {
        padding: 20px;
    }

    .kb-news-card__image {
        height: 180px;
    }
}

/* Print styles */
@media print {
    .kb-header,
    .kb-footer,
    .kb-breadcrumb,
    .kb-back-to-top,
    .kb-hero__dots,
    .kb-hero__arrow,
    .kb-sidebar,
    .kb-inquiry-form {
        display: none !important;
    }

    .kb-hero {
        height: auto;
        min-height: auto;
    }

    .kb-container {
        max-width: 100%;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    a {
        text-decoration: underline;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast */
@media (prefers-contrast: high) {
    :root {
        --kb-gray-300: #aaa;
        --kb-gray-400: #888;
        --kb-gray-500: #666;
    }
}