@charset "utf-8";
/* ================================================================
   IoT Academy – Homepage Custom Styles
   Extends ui-kit.css; only styles not covered by the ui-kit live here.
   ================================================================ */

/* ---------------------------------------------------------------
   1. Page-level layout
---------------------------------------------------------------- */
body {
    background-color: var(--bg-surface);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin: 0;
}

.courses {
    flex: 1;
}

/* Push content below the fixed header */
.page-courses {
    padding-top: 60px; /* matches course-header-menu height */
}

/* ---------------------------------------------------------------
   2. Header menu (course-header-menu)
      Custom header; not based on ui-kit navbar component.
---------------------------------------------------------------- */
.course-header-menu {
    position: relative;
    z-index: 10;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--color-border);
    height: 60px;
}

.course-header-menu__inner {
    display: flex;
    align-items: center;
    height: 100%;
    max-width: 1600px;
    margin: 0 auto;
    gap: var(--space-sm);
}

/* Brand */
.course-header-menu__brand {
    display: flex;
    align-items: center;
    gap: var(--space-xxs);
    flex-shrink: 0;
    text-decoration: none;
}

.course-header-menu__logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.course-header-menu__logo {
    height: 32px;
    display: block;
}

.course-header-menu__sitename {
    display: flex;
    gap: 8px;
    font-size: 20px;
    font-weight: var(--font-weight-bold);
    color: var(--color-brand-blue-900);
    white-space: nowrap;
    padding-left: 15px;
    margin-left: 5px;
    border-left: 2px solid var(--color-grey-300);
}

/* Nav links */
.course-header-menu__nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.course-header-menu__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: stretch;
    height: 60px;
}

.course-header-menu__item {
    display: flex;
    align-items: stretch;
}

.course-header-menu__link {
    display: flex;
    align-items: center;
    padding: 0 var(--space-xxs);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-brand-blue-900);
    text-decoration: none;
    border-bottom: 4px solid transparent;
    transition: border-color 0.2s, color 0.2s;
    white-space: nowrap;
}

    .course-header-menu__item.active .course-header-menu__link, .course-header-menu__link:hover {
        border-bottom-color: var(--color-brand-blue-900);
        text-decoration: none;
        color: var(--color-brand-blue-900);
    }

/* Right controls */
.course-header-menu__controls {
    display: flex;
    align-items: center;
    gap: var(--space-xxs);
    margin-left: auto;
    flex-shrink: 0;
}

.course-header-menu__divider {
    width: 1px;
    height: var(--space-xs);
    background-color: var(--color-grey-300);
    margin: 0 calc(var(--space-xxs) / 2);
}

/* Dropdown wrap (user / language) */
.course-header-menu__dropdown-wrap {
    position: relative;
}

.course-header-menu__btn {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: calc(var(--space-xxs) / 2);
    font-size: var(--font-size-base);
    color: var(--color-brand-blue-900);
    padding: calc(var(--space-xxs) / 2) calc(var(--space-xxs) / 2);
    border-radius: var(--radius-element);
    white-space: nowrap;
    transition: background 0.2s;
}

.course-header-menu__chevron {
    font-size: 12px;
    transition: transform 0.2s;
}

.course-header-menu__btn[aria-expanded="true"] .course-header-menu__chevron {
    transform: rotate(180deg);
}

/* Dropdown panel */
.course-header-menu__dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 600;
    list-style: none;
    margin: 0;
    padding: calc(var(--space-xxs) / 2) 0;
    background: var(--bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-element);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    min-width: 160px;
}

.course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
    display: flex;
    gap: 5px;
    flex-direction: column;
}

.course-header-menu__dropdown-item {
    display: flex;
    align-items: center;
    gap: calc(var(--space-xxs) / 2);
    padding: calc(var(--space-xxs) / 2) var(--space-xxs);
    font-size: var(--font-size-base);
    color: var(--color-brand-blue-900);
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.15s;
}

    .course-header-menu__dropdown-item:hover {
        color: var(--color-brand-blue-900);
    }

.course-header-menu__dropdown-item--active {
    color: var(--color-brand-blue-600);
    font-weight: var(--font-weight-bold);
}

.course-header-menu__dropdown-item--signout {
    border-top: 1px solid var(--color-border);
    margin-top: calc(var(--space-xxs) / 2);
    padding-top: var(--space-xxs);
}

/* Nav-level dropdown button (e.g. 产教融合) */
.course-header-menu__nav .course-header-menu__dropdown-wrap .course-header-menu__btn {
    height: 60px;
    border-bottom: 4px solid transparent;
    border-radius: 0;
    padding: 0 var(--space-xxs);
    font-weight: var(--font-weight-medium);
    transition: border-color 0.2s, color 0.2s;
}

.course-header-menu__nav .course-header-menu__dropdown-wrap.is-open .course-header-menu__btn {
    border-bottom-color: var(--color-brand-blue-900);
}

/* Filter component styles → see css/filter.css */

/* Hamburger toggle (mobile nav) */
.course-header-menu__hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: calc(var(--space-xxs) / 2);
    font-size: 20px;
    color: var(--color-brand-blue-900);
    border-radius: var(--radius-element);
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    flex-shrink: 0;
}

/* Mobile-only nav items: hidden on desktop, revealed inside hamburger nav ≤960px */
.course-header-menu__item--mobile-controls {
    display: none;
}

/*Filter*/
.ui-filter__bar {
    padding-bottom: var(--space-xs);
}

/* ---------------------------------------------------------------
   10. Results bar (count + sort)
---------------------------------------------------------------- */
.courses-listing-section {
    padding: 25px 0;
}

    .courses-listing-section .row {
        gap: 25px;
    }

.courses-results-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-xxs);
}

.courses-count {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-default);
}

.courses-sort {
    display: flex;
    align-items: center;
    gap: 8px;
}

.courses-sort__label {
    font-size: var(--font-size-base);
    color: var(--color-text-muted);
    white-space: nowrap;
}

.courses-sort__select {
    min-width: 100px;
    padding: calc(var(--space-xxs) / 2) var(--space-xxs);
    border-radius: var(--radius-element);
    border: 1px solid var(--color-border);
    font-size: var(--font-size-base);
    cursor: pointer;
}

/* ---------------------------------------------------------------
   11. Course card
---------------------------------------------------------------- */
/* Contain .ui-card__link (position:absolute; z-index:1) inside the card's own
   stacking context. Without this, the link escapes to the root stacking context
   at z-index:1 — same level as .courses-filter-section — and DOM order lets
   cards beat the filter dropdown in pointer-event dispatch. */
.courses-listing-section .ui-card {
    z-index: 0;
}

/* Card header: level + duration + badge in one row */
.course-card__header {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xxs);
    margin-bottom: calc(var(--space-xxs) / 2);
}

.course-card__level,
.course-card__duration {
    display: inline-flex;
    align-items: center;
    gap: calc(var(--space-xxs) / 2);
    white-space: nowrap;
}

    .course-card__level i,
    .course-card__duration i {
        color: var(--color-grey-500);
    }

/* Featured badge */
.course-card__badge {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    color: #333;
    padding: 1px 8px;
    border-radius: 5px;
    line-height: 1.4;
}

.course-card__badge--featured {
    background-color: var(--bg-brand-light);
}

/* Item title for courses */
.course-card .item__title {
    font-weight: var(--font-weight-bold);
    -webkit-line-clamp: 3;
    flex: 1;
}

/* Meta row: audience | type */
.course-card .item__meta {
    font-size: 14px;
    color: var(--color-grey-800);
    margin-top: auto;
    padding-top: calc(var(--space-xxs) / 2);
    gap: 5px;
}

.item__meta .item__type + .item__type::before {
    content: "|";
    color: var(--color-grey-800);
    margin: 0 5px 0 0;
}

.course-card i {
    background-image: var(--color-brand-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/*pagination*/
.pagination-wrapper {
    display: inherit;
}

/* ---------------------------------------------------------------
   11b. CN Course card (course-card-cn)
   含圖片 + 標題 + 元資料鍵值列表 / 描述段落
---------------------------------------------------------------- */
.course-card-cn .ui-card__media {
    position: relative;
}

    .course-card-cn .ui-card__media .course-card__badge {
        position: absolute;
        top: var(--space-xxs);
        left: var(--space-xxs);
        z-index: 2;
    }

.course-card-cn .item__title {
    font-weight: var(--font-weight-bold);
    -webkit-line-clamp: 2;
}

.course-card-cn .ui-card__media img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: var(--radius-component) var(--radius-component) 0 0;
    display: block;
}

.course-card-cn__meta {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: var(--font-size-base);
}

    .course-card-cn__meta li {
        display: flex;
        flex-direction: row;
    }

.course-card-cn__meta-key {
    font-weight: var(--font-weight-regular);
    white-space: nowrap;
    flex-shrink: 0;
}

    .course-card-cn__meta-key::after {
        content: "：";
    }

.course-card-cn__meta-val {
}

    .course-card-cn__meta-val a {
        color: var(--color-brand-blue-600);
        text-decoration: none;
    }

        .course-card-cn__meta-val a:hover {
            text-decoration: underline;
        }

.course-card-cn .item__desc {
    font-size: var(--font-size-base);
    display: -webkit-box;
    line-height: var(--line-height-base);
}

/* ---------------------------------------------------------------
   12. Responsive overrides
   Breakpoints: 1600px / 1024px / 768px / 580px (per layout-utilities.md)
---------------------------------------------------------------- */
@media (max-width: 1600px) {
    .course-header-menu, .courses-listing-section {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
}

@media (max-width: 1440px) {
    .ui-card-group--4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1280px) {
    .ui-filter-search {
        max-width: 100%;
    }
}

@media (max-width: 1024px) {
    /* Show hamburger, hide inline nav */
    .course-header-menu__hamburger {
        display: flex;
    }

    .course-header-menu__nav {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        z-index: 200;
        background: var(--color-grey-100);
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 8px 10px rgba(0, 0, 0, 0.1);
        padding: 0 var(--space-xs);
    }

    .course-header-menu.is-nav-open .course-header-menu__nav {
        display: block;
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .course-header-menu__list {
        flex-direction: column;
        height: auto;
    }

    .course-header-menu__item {
        border-bottom: 1px solid var(--color-border);
    }

        .course-header-menu__item:last-child {
            border-bottom: none;
        }

    .course-header-menu__link {
        padding: var(--space-xs) 0;
        border-bottom: none;
        border-left: 3px solid transparent;
        gap: 5px;
    }

        .course-header-menu__item.active .course-header-menu__link,
        .course-header-menu__link:hover {
            border-bottom-color: transparent;
        }

    /* Hide text labels and chevron arrows in user/language buttons */
    .course-header-menu__btn span,
    .course-header-menu__chevron {
        display: none;
    }

    .course-header-menu__divider {
        display: none;
    }

    /* Show user / language controls inside the hamburger nav */
    .course-header-menu__item--mobile-controls {
        display: flex;
    }

    /* Hide the user account dropdown from the top bar (moved into hamburger nav) */
    .course-header-menu__controls .course-header-menu__user-wrap {
        display: none;
    }

    /* User account mobile dropdown: border separators + padding matching nav sub-item style */
    .course-header-menu__item--mobile-controls .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
        border-top: 1px solid var(--color-border);
    }

    .course-header-menu__item--mobile-controls .course-header-menu__dropdown li {
    }

        .course-header-menu__item--mobile-controls .course-header-menu__dropdown li:last-child {
            border-bottom: none;
        }

    .course-header-menu__item--mobile-controls .course-header-menu__dropdown .course-header-menu__dropdown-item {
        padding: var(--space-xxs) 0 var(--space-xxs) var(--space-xxs);
    }

    .course-header-menu__item--mobile-controls .course-header-menu__dropdown-item--signout {
        padding-top: var(--space-xxs);
    }

    .course-header-menu__item--mobile-controls .course-header-menu__dropdown .course-header-menu__dropdown-item i {
        display: none;
    }

    .course-header-menu__hamburger i {
        width: 17px;
    }

    /* User / language dropdowns: match hamburger nav panel style */
    .course-header-menu__dropdown-wrap {
        position: static;
    }

        .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
            position: absolute;
            top: 60px;
            left: 0;
            right: 0;
            border-radius: 0;
            border: none;
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            padding: 0 var(--space-xs);
            min-width: 0;
            z-index: 999;
        }

    .course-header-menu__dropdown li {
    }

        .course-header-menu__dropdown li:last-child {
            border-bottom: none;
        }

    .course-header-menu__dropdown-item {
        padding: var(--space-xxs) 0;
    }

    /* Language / user dropdowns in controls: match hamburger nav panel item style */
    .course-header-menu__controls .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
        background: var(--color-grey-100);
    }

    .course-header-menu__controls .course-header-menu__dropdown li {
        border-bottom: 1px solid var(--color-border);
    }

        .course-header-menu__controls .course-header-menu__dropdown li:last-child {
            border-bottom: none;
        }

    .course-header-menu__controls .course-header-menu__dropdown-item {
        padding: var(--space-xs) 0;
    }

    .course-header-menu__dropdown-item--signout {
        border-top: none;
        margin-top: 0;
        padding-top: var(--space-xs);
    }

    .ui-card-group--4 {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xs);
    }
}

@media (max-width: 1024px) {
    /* 顯示按鈕文字與箭頭（覆寫 .course-header-menu__btn span { display:none } ） */
    .course-header-menu__nav .course-header-menu__dropdown-wrap .course-header-menu__btn span,
    .course-header-menu__nav .course-header-menu__dropdown-wrap .course-header-menu__chevron {
        display: inline;
    }

    /* 讓按鈕樣式與其他 nav link 一致 */
    .course-header-menu__nav .course-header-menu__dropdown-wrap .course-header-menu__btn {
        width: 100%;
        height: 56px;
        padding: var(--space-xs) 0;
        border-bottom: none;
        border-left: 3px solid transparent;
        border-radius: 0;
        justify-content: flex-start;
        font-size: var(--font-size-base);
        font-weight: var(--font-weight-medium);
        line-height: var(--line-height-base);
    }

    /* 下拉選單改為 inline 展開，取消絕對定位飛出效果 */
    .course-header-menu__nav .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
        position: static;
        top: auto;
        left: auto;
        right: auto;
        border: none;
        border-radius: 0;
        box-shadow: none;
        padding: 0;
        min-width: 0;
        z-index: auto;
        background: transparent;
    }

    /* 子選項縮排，視覺上表示層級 */
    .course-header-menu__nav .course-header-menu__dropdown .course-header-menu__dropdown-item {
        padding-left: var(--space-xxs);
        font-size: var(--font-size-base);
    }

    .course-header-menu__item {
        flex-direction: column;
    }

    .course-header-menu__nav .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown, .course-header-menu__nav .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
        background-color: var(--color-white);
        border-top: 4px solid var(--color-brand-blue-900);
    }
}

@media (max-width: 768px) {

    .course-header-menu, .courses-listing-section, .courses-filter-section {
        padding-left: var(--space-xs);
        padding-right: var(--space-xs);
    }

    .page-courses {
        padding-top: 56px;
    }

    .course-header-menu__sitename {
        font-size: 16px;
    }

    .course-header-menu__btn span {
        display: none; /* hide text labels on small screens, keep icons */
    }

    .course-header-menu.is-nav-open .course-header-menu__nav {
        display: block;
        padding-left: var(--space-xs);
        padding-right: var(--space-xs);
    }
}

@media (max-width: 580px) {
    .course-header-menu__logo {
        height: 23px;
    }

    .courses-results-bar {
        flex-direction: row;
    }

    .ui-card-group--4 {
        grid-template-columns: repeat(1, 1fr);
    }

    .course-header-menu__item {
        flex-direction: column;
    }

    .course-header-menu__nav .course-header-menu__dropdown-wrap.is-open .course-header-menu__dropdown {
        padding: 5px 0;
        gap: 0;
    }
}

@media (max-width: 380px) {
    .course-header-menu__hamburger {
        padding-right: 0;
    }

    .course-header-menu__inner {
        gap: 5px;
    }

    .course-header-menu__sitename {
        padding-left: 5px;
        margin-left: 0;
    }

    .course-header-menu__controls {
        gap: 5px;
    }
}

/* ---------------------------------------------------------------
   13. Footer (advan-footer)
---------------------------------------------------------------- */
#advan-footer {
    border-top: 1px solid var(--color-border);
    background-color: var(--bg-surface);
}

.footer__main {
    padding: var(--space-md) 0;
}

.footer__inner {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    gap: var(--space-md);
}

.footer__col {
    flex: 1;
}

.footer__col--wide {
    flex: 1.4;
}

.footer__col--qr {
    flex: 0 0 auto;
}

.footer__heading {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-bold);
    margin: 0 0 var(--space-xxs);
}

.footer__links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

    .footer__links a {
        font-size: var(--font-size-base);
        line-height: var(--line-height-base);
        color: var(--color-brand-blue-900);
        text-decoration: none;
    }

        .footer__links a:hover {
            text-decoration: underline;
        }

.footer__qrcode {
    width: auto;
    height: auto;
    display: block;
    margin-top: 4px;
}

.footer__bottom {
    border-top: 1px solid var(--color-border);
    padding: var(--space-xxs) 0;
}

.footer__copyright {
    font-size: 13px;
    color: var(--color-text-muted);
    text-align: center;
    margin: 0;
}

@media (max-width: 1600px) {
    .footer__inner {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }
}

@media (max-width: 768px) {
    .footer__main {
        padding: var(--space-xs) 0;
    }

    .footer__inner {
        flex-wrap: wrap;
        padding-left: var(--space-xs);
        padding-right: var(--space-xs);
        gap: var(--space-xs);
    }

    .footer__col,
    .footer__col--wide {
        flex: 1 1 calc(50% - var(--space-xs));
    }

    .footer__col--qr {
        flex: 1 1 100%;
    }

    .footer__qrcode {
        width: 90px;
    }
}

@media (max-width: 580px) {
    .footer__col,
    .footer__col--wide {
        flex: 1 1 100%;
    }
}

/*Ui-kit.css*/
.ui-tag:has(.ui-tag__remove) {
    background: linear-gradient(var(--color-white), var(--color-white)) padding-box, var(--color-brand-gradient) border-box;
}

/* ---------------------------------------------------------------
   Skeleton Loader — shimmer wave, light mode (gray tones)
   Used during isDataloading: course card list + filter panel
---------------------------------------------------------------- */
@keyframes skeleton-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-bone {
    background: linear-gradient(
        90deg,
        #e8e8e8 25%,
        #f2f2f2 50%,
        #e8e8e8 75%
    );
    background-size: 200% 100%;
    border-radius: 4px;
    animation: skeleton-shimmer 1.6s ease-in-out infinite;
}

/* --- Course card skeleton ------------------------------------ */
.course-skeleton {
    min-height: 170px; /* approximate real card height */
}

.course-skeleton__header {
    display: flex;
    gap: 8px;
}

.course-skeleton__tag {
    height: 14px;
    width: 72px;
    flex-shrink: 0;
}

.course-skeleton__title {
    height: 16px;
    width: 100%;
}

.course-skeleton__title--short {
    width: 55%;
}

.course-skeleton__meta {
    display: flex;
    gap: 6px;
    margin-top: auto;
}

.course-skeleton__meta-tag {
    height: 14px;
    width: 60px;
}

/* --- Results bar skeleton (reuses .courses-results-bar layout) */
.courses-skeleton__count {
    height: 16px;
    width: 120px;
}

.courses-skeleton__sort {
    height: 32px;
    width: 160px;
    border-radius: var(--radius-element, 4px);
}

/* --- Filter panel skeleton (inherits .ui-filter-controls flex) */
.filter-skeleton {
    display: contents; /* join parent's flex flow without extra wrapper */
}

.filter-skeleton__btn {
    height: 38px;
    width: 88px;
    border-radius: var(--radius-element, 4px);
    flex-shrink: 0;
}

.filter-skeleton__btn:nth-child(2n) { width: 72px; }
.filter-skeleton__btn:nth-child(3n) { width: 104px; }