html {
    --top-navbar-height: 48px;
    overflow-y: scroll;
    overscroll-behavior-y: none;
    scrollbar-gutter: stable;
}

body {
    padding-top: var(--top-navbar-height);
    overscroll-behavior-y: none;
}

body > .toast {
    top: calc(var(--top-navbar-height) + 18px);
}

body > #page-toast {
    top: calc(var(--top-navbar-height) + 20px);
}

.top-navbar {
    position: fixed;
    z-index: 300;
    top: 0;
    right: 0;
    left: 0;
    box-sizing: border-box;
    display: flex;
    height: var(--top-navbar-height);
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--line, #dce1e7);
    background: #ffffff;
    padding: 0 24px;
}

.navbar-main {
    display: flex;
    min-width: 0;
    flex: 1;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.brand-link {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: 10px;
    color: var(--text, #20242a);
    font-weight: 700;
    text-decoration: none;
}

.brand-mark {
    display: block;
    width: 28px;
    height: 28px;
    flex: 0 0 auto;
    object-fit: contain;
}

.brand-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.primary-nav {
    display: flex;
    min-width: 0;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
}

.nav-link {
    display: inline-flex;
    width: 104px;
    flex: 0 0 104px;
    min-height: 30px;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border: 1px solid transparent;
    border-radius: 6px;
    color: #424a54;
    padding: 4px 8px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.nav-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    flex: 0 0 16px;
    background: currentColor;
    -webkit-mask-position: center;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-size: contain;
    mask-position: center;
    mask-repeat: no-repeat;
    mask-size: contain;
}

.nav-icon-home {
    -webkit-mask-image: url("/static/svg/home.svg");
    mask-image: url("/static/svg/home.svg");
}

.nav-icon-exercise {
    -webkit-mask-image: url("/static/svg/exercise.svg");
    mask-image: url("/static/svg/exercise.svg");
}

.nav-icon-exam {
    -webkit-mask-image: url("/static/svg/exam.svg");
    mask-image: url("/static/svg/exam.svg");
}

.nav-icon-strategy {
    -webkit-mask-image: url("/static/svg/strategy.svg");
    mask-image: url("/static/svg/strategy.svg");
}

.nav-icon-live {
    -webkit-mask-image: url("/static/svg/live.svg");
    mask-image: url("/static/svg/live.svg");
}

.nav-icon-list {
    -webkit-mask-image: url("/static/svg/list.svg");
    mask-image: url("/static/svg/list.svg");
}

.nav-icon-create {
    -webkit-mask-image: url("/static/svg/create.svg");
    mask-image: url("/static/svg/create.svg");
}

.nav-icon-category {
    -webkit-mask-image: url("/static/svg/category.svg");
    mask-image: url("/static/svg/category.svg");
}

.nav-menu {
    position: relative;
    display: inline-flex;
}

.nav-menu-trigger {
    background: transparent;
    color: #424a54;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    font-weight: 600;
    line-height: 20px;
}

.nav-menu-arrow {
    position: relative;
    display: block;
    width: 14px;
    height: 20px;
    flex: 0 0 14px;
    color: var(--muted, #68717d);
    transition: transform 0.15s ease;
    transform-origin: 50% 50%;
}

.nav-menu-arrow::before,
.nav-menu-arrow::after {
    position: absolute;
    top: calc(50% + 2px);
    width: 5px;
    height: 1.5px;
    border-radius: 1px;
    background: currentColor;
    content: "";
}

.nav-menu-arrow::before {
    left: 2px;
    transform: translateY(-50%) rotate(45deg);
    transform-origin: right center;
}

.nav-menu-arrow::after {
    right: 2px;
    transform: translateY(-50%) rotate(-45deg);
    transform-origin: left center;
}

.nav-menu-panel {
    position: absolute;
    z-index: 30;
    top: calc(100% + 6px);
    left: 0;
    display: none;
    min-width: 128px;
    border: 1px solid var(--line, #dce1e7);
    border-radius: 6px;
    background: #ffffff;
    box-shadow: 0 8px 20px rgba(28, 36, 44, 0.14);
    padding: 6px;
}

.nav-menu-panel::before {
    position: absolute;
    right: 0;
    bottom: 100%;
    left: 0;
    height: 8px;
    content: "";
}

.nav-menu:hover .nav-menu-panel,
.nav-menu:focus-within .nav-menu-panel {
    display: grid;
}

.nav-menu:hover .nav-menu-arrow,
.nav-menu:focus-within .nav-menu-arrow {
    transform: rotate(180deg);
}

.nav-menu-item {
    display: flex;
    min-height: 34px;
    align-items: center;
    gap: 8px;
    border-radius: 5px;
    color: var(--text, #20242a);
    padding: 6px 10px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.nav-menu-item:hover {
    background: #f8faf9;
}

.nav-menu-item.is-active {
    background: var(--primary-soft, #e7f5ed);
    color: var(--primary, #176b4d);
}

.login-link {
    display: inline-flex;
    min-height: 30px;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--primary, #176b4d);
    border-radius: 6px;
    background: var(--primary, #176b4d);
    color: #ffffff;
    font-weight: 650;
    padding: 4px 12px;
    text-decoration: none;
    white-space: nowrap;
}

.nav-link:hover {
    border-color: var(--line, #dce1e7);
    background: #f8faf9;
    color: var(--text, #20242a);
}

.login-link:hover {
    background: var(--primary-hover, #10573e);
}

.nav-link:focus-visible,
.nav-menu-item:focus-visible,
.brand-link:focus-visible,
.avatar-button:focus-visible,
.user-menu-item:focus-visible,
.login-link:focus-visible {
    outline: 3px solid var(--focus, rgba(23, 107, 77, 0.22));
    outline-offset: 2px;
}

.nav-link.is-active {
    border-color: var(--primary, #176b4d);
    background: var(--primary-soft, #e7f5ed);
    color: var(--primary, #176b4d);
}

.nav-menu.is-active > .nav-link {
    border-color: var(--primary, #176b4d);
    background: var(--primary-soft, #e7f5ed);
    color: var(--primary, #176b4d);
}

.user-menu {
    position: relative;
    flex: 0 0 auto;
}

.avatar-button {
    --avatar-size: 24px;
    --avatar-border: 0;
    --avatar-background: var(--primary, #176b4d);
    --avatar-color: #ffffff;
    display: inline-flex;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line-strong, #c2c9d1);
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    list-style: none;
}

.avatar-button::-webkit-details-marker {
    display: none;
}

.user-menu-panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 20;
    display: grid;
    min-width: 160px;
    border: 1px solid var(--line, #dce1e7);
    border-radius: 6px;
    background: #ffffff;
    padding: 6px;
}

.user-menu-name {
    overflow: hidden;
    padding: 7px 10px;
    color: var(--muted, #68717d);
    font-size: 12px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-menu-item {
    display: flex;
    min-height: 34px;
    align-items: center;
    border-radius: 5px;
    padding: 6px 10px;
    color: var(--text, #20242a);
    font-weight: 600;
    text-decoration: none;
}

.user-menu-item:hover {
    background: #f8faf9;
}

.user-menu-danger {
    margin-top: 4px;
    border-top: 1px solid var(--line, #dce1e7);
    border-radius: 0 0 5px 5px;
    color: var(--danger, #b42318);
}

.user-menu-danger:hover {
    background: var(--danger-soft, #fff0ee);
    color: var(--danger, #b42318);
}

@media (max-width: 760px) {
    html {
        --top-navbar-height: 124px;
    }

    .top-navbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 8px 16px;
    }

    .brand-link {
        max-width: calc(100% - 74px);
    }

    .navbar-main {
        width: 100%;
        align-items: flex-start;
        justify-content: flex-start;
    }

    .primary-nav {
        width: 100%;
        flex: 0 0 100%;
        flex-wrap: wrap;
        justify-content: flex-start;
        overflow: visible;
        padding-bottom: 2px;
    }

    .nav-menu {
        flex: 0 0 auto;
    }

    .nav-link {
        width: auto;
        flex: 0 0 auto;
    }

    .login-link,
    .user-menu {
        position: absolute;
        top: 8px;
        right: 16px;
    }
}

@media (max-width: 360px) {
    html {
        --top-navbar-height: 160px;
    }
}