:root {
    color-scheme: light;
    --pn-bg: #ffffff;
    --pn-surface: #ffffff;
    --pn-surface-soft: #f7f7f7;
    --pn-surface-raised: #ffffff;
    --pn-text: #1a1a1a;
    --pn-text-soft: #5c5c5c;
    --pn-border: #e2e2e2;
    --pn-blue: #0a84ff;
    --pn-yellow: #ffa116;
    --pn-red: #ef4743;
    --pn-green: #2cbb5d;
    --pn-primary: var(--pn-blue);
    --pn-primary-strong: #006dcc;
    --pn-primary-soft: rgba(10, 132, 255, 0.1);
    --pn-accent: var(--pn-yellow);
    --pn-danger: var(--pn-red);
    --pn-header: rgba(255, 255, 255, 0.97);
    --pn-header-text: #1a1a1a;
    --pn-shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.08);
    --pn-shadow-md: 0 12px 32px rgba(0, 0, 0, 0.14);
    --pn-radius-sm: 8px;
    --pn-radius: 12px;
    --pn-radius-lg: 18px;
}

html[data-pnloj-theme="dark"] {
    color-scheme: dark;
    --pn-bg: #1a1a1a;
    --pn-surface: #202020;
    --pn-surface-soft: #282828;
    --pn-surface-raised: #242424;
    --pn-text: #f5f5f5;
    --pn-text-soft: #b3b3b3;
    --pn-border: #3a3a3a;
    --pn-blue: #0a84ff;
    --pn-yellow: #ffa116;
    --pn-red: #ef4743;
    --pn-green: #2cbb5d;
    --pn-primary: var(--pn-blue);
    --pn-primary-strong: #409cff;
    --pn-primary-soft: rgba(10, 132, 255, 0.16);
    --pn-accent: var(--pn-yellow);
    --pn-danger: var(--pn-red);
    --pn-header: rgba(32, 32, 32, 0.97);
    --pn-header-text: #ffffff;
    --pn-shadow-sm: 0 5px 16px rgba(0, 0, 0, 0.34);
    --pn-shadow-md: 0 16px 38px rgba(0, 0, 0, 0.5);
}

html {
    background: var(--pn-bg);
    scroll-behavior: smooth;
}

body {
    max-width: none;
    background: var(--pn-bg);
    color: var(--pn-text);
    font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 14px;
    line-height: 1.55;
    transition: background-color 180ms ease, color 180ms ease;
}

a {
    color: var(--pn-primary);
    text-underline-offset: 3px;
}

a:hover,
a:focus {
    color: var(--pn-primary-strong);
}

:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--pn-primary) 45%, transparent);
    outline-offset: 2px;
}

#navigation {
    height: 64px;
    background: var(--pn-header);
    border-bottom: 1px solid var(--pn-border);
    box-shadow: var(--pn-shadow-sm);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

#nav-container {
    display: flex;
    align-items: center;
    height: 64px;
    background: transparent;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
    box-sizing: border-box;
}

#nav-list {
    display: flex !important;
    flex: 1 1 auto;
    align-items: center;
    gap: 4px;
    min-width: 0;
    height: 64px;
    margin: 0;
    padding: 0;
}

#nav-list > li {
    display: inline-flex !important;
    align-items: center;
    flex: 0 0 auto;
    color: var(--pn-header-text);
    text-transform: none;
}

#nav-list > li > a,
#nav-list > li > button {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    height: auto;
    padding: 0 12px;
    border-radius: 10px;
    color: var(--pn-header-text);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0;
    transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

#nav-list > li > a:link,
#nav-list > li > a:visited {
    color: var(--pn-header-text);
}

#nav-list > li > a:hover,
#nav-list > li > a:focus,
#nav-list > li > a.active {
    color: var(--pn-primary-strong);
    background: var(--pn-primary-soft);
}

#nav-list > li > a:active {
    transform: translateY(1px);
}

#nav-list .home-nav-element > a {
    height: 48px;
    min-height: 48px;
    padding: 0 10px 0 0;
    background: transparent;
}

#nav-list .home-nav-element > a:hover,
#nav-list .home-nav-element > a:focus {
    background: transparent;
}

.pnloj-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    height: 48px;
    color: var(--pn-header-text);
}

.pnloj-brand-logo {
    display: block;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: contain;
}

.pnloj-brand-name {
    font-size: 17px;
    font-weight: 750;
    letter-spacing: -0.02em;
    white-space: nowrap;
    text-transform: none;
}

.pnloj-mobile-brand {
    display: none;
}

#navigation .nav-divider {
    height: 28px;
    margin: 0 4px 0 0;
    padding: 0;
    border-right: 1px solid var(--pn-border);
}

#nav-list > li > ul {
    top: calc(100% + 8px);
    left: 0;
    min-width: 180px;
    padding: 7px;
    border: 1px solid var(--pn-border);
    border-radius: var(--pn-radius);
    background: var(--pn-surface-raised);
    box-shadow: var(--pn-shadow-md);
}

#nav-list > li > ul li a,
#nav-list > li > ul li button {
    padding: 9px 11px !important;
    border: 0;
    border-radius: 8px;
    color: var(--pn-text);
    font-size: 13px;
}

#nav-list > li > ul li a:hover,
#nav-list > li > ul li a:focus {
    color: var(--pn-primary-strong);
    background: var(--pn-primary-soft);
}

#user-links {
    position: static;
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 8px;
    height: 64px;
    margin-left: auto;
    color: var(--pn-text-soft);
}

#user-links > ul {
    margin: 0;
    padding: 0;
}

#user-links .anon {
    min-height: 38px;
    padding: 0;
    gap: 4px;
    color: var(--pn-text-soft);
}

#user-links .anon a,
#user-links > ul > li > a {
    color: var(--pn-header-text);
}

#user-links .anon a {
    padding: 8px 10px;
    border-radius: 9px;
}

#user-links .anon a:hover {
    background: var(--pn-primary-soft);
    color: var(--pn-primary-strong);
}

.pnloj-header-tools {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.pnloj-language-form,
.pnloj-language-control {
    display: inline-flex;
    align-items: center;
    margin: 0;
}

.pnloj-language-control,
.pnloj-theme-toggle {
    height: 36px;
    border: 1px solid var(--pn-border);
    border-radius: 10px;
    background: var(--pn-surface-soft);
    color: var(--pn-header-text);
    box-shadow: none;
}

.pnloj-language-control {
    position: relative;
    padding-left: 10px;
}

.pnloj-language-control i {
    color: var(--pn-text-soft);
    pointer-events: none;
}

.pnloj-language-select {
    width: 82px;
    height: 34px;
    margin: 0;
    padding: 0 25px 0 7px;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--pn-header-text);
    font: inherit;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
}

.pnloj-language-select option {
    background: var(--pn-surface);
    color: var(--pn-text);
}

.pnloj-theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    min-width: 36px;
    padding: 0;
    cursor: pointer;
}

.pnloj-language-control:hover,
.pnloj-theme-toggle:hover {
    border-color: var(--pn-primary);
    background: var(--pn-primary-soft);
    color: var(--pn-primary-strong);
}

.pnloj-visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

#page-container {
    max-width: 1240px;
    min-height: 100%;
    border: 0;
    background: var(--pn-surface);
    box-shadow: 0 0 0 1px var(--pn-border), var(--pn-shadow-sm);
}

#content {
    width: calc(100% - 48px);
    max-width: 1160px;
    min-height: 28em;
    margin: 88px auto 0;
}

#content > h2,
#content .title {
    color: var(--pn-text);
    font-weight: 700;
    letter-spacing: -0.02em;
}

hr {
    border-color: var(--pn-border);
}

.sidebox,
.form-area,
.content-description,
.tabs,
.info-float {
    border-color: var(--pn-border) !important;
    border-radius: var(--pn-radius) !important;
    background: var(--pn-surface-raised) !important;
    box-shadow: var(--pn-shadow-sm);
}

.sidebox h3 {
    padding: 11px 14px;
    border-radius: var(--pn-radius) var(--pn-radius) 0 0;
    background: var(--pn-surface-soft);
    color: var(--pn-text);
    font-size: 15px;
    font-weight: 700;
}

.sidebox-content {
    background: var(--pn-surface-raised);
    color: var(--pn-text);
}

.table,
table.sortable {
    border-color: var(--pn-border);
    border-radius: var(--pn-radius);
    background: var(--pn-surface);
}

.table th,
table.sortable th {
    border-color: var(--pn-border);
    background: var(--pn-surface-soft);
    color: var(--pn-text);
    font-weight: 700;
}

.table td,
table.sortable td {
    border-color: var(--pn-border);
    color: var(--pn-text);
}

.table tbody tr:hover,
table.sortable tbody tr:hover {
    background: var(--pn-primary-soft);
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
input[type="search"],
input[type="url"],
textarea,
select {
    border-color: var(--pn-border);
    border-radius: var(--pn-radius-sm);
    background: var(--pn-surface);
    color: var(--pn-text);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--pn-primary) !important;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--pn-primary) 18%, transparent) !important;
}

.button,
button,
input[type="submit"],
input[type="button"],
a.button {
    border-color: var(--pn-primary);
    border-radius: var(--pn-radius-sm);
    background: var(--pn-primary);
    color: #fff;
    font-weight: 650;
    box-shadow: none;
}

.button:hover,
button:hover,
input[type="submit"]:hover,
input[type="button"]:hover,
a.button:hover {
    border-color: var(--pn-primary-strong);
    background: var(--pn-primary-strong);
    color: #fff;
}

footer {
    border-color: var(--pn-border);
    background: var(--pn-surface-soft);
    color: var(--pn-text-soft);
}

footer select {
    height: 30px !important;
}

html[data-pnloj-theme="dark"] img:not(.pnloj-brand-logo):not([src*="gravatar"]) {
    opacity: 0.96;
}

@media (max-width: 1120px) {
    .pnloj-brand-name {
        display: none;
    }

    #nav-list > li > a,
    #nav-list > li > button {
        padding-right: 9px;
        padding-left: 9px;
    }
}

@media (max-width: 760px) {
    #navigation,
    #nav-container {
        height: 56px;
    }

    #nav-container {
        padding: 0 10px;
    }

    #navicon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        float: none;
        width: 40px;
        height: 40px;
        margin: 0;
        padding: 0;
        border-radius: 10px;
        color: var(--pn-header-text);
        font-size: 20px;
    }

    #navicon:hover,
    #navicon.hover {
        background: var(--pn-primary-soft);
        color: var(--pn-primary-strong);
        text-shadow: none;
    }

    .pnloj-mobile-brand {
        display: inline-flex;
        align-items: center;
        gap: 0;
        margin-left: 8px;
        color: var(--pn-header-text);
        font-weight: 750;
        text-decoration: none;
    }

    .pnloj-mobile-brand img {
        display: none;
    }

    #nav-list {
        display: none !important;
        position: absolute;
        top: 56px;
        bottom: auto;
        left: 0;
        width: min(84vw, 310px);
        height: calc(100vh - 56px);
        height: calc(100dvh - 56px);
        padding: 12px;
        overflow-y: auto;
        overscroll-behavior: contain;
        z-index: 700;
        box-sizing: border-box;
        border-right: 1px solid var(--pn-border);
        background: var(--pn-surface-raised);
        box-shadow: var(--pn-shadow-md);
    }

    #nav-list.show-list,
    #navicon[aria-expanded="true"] ~ #nav-list {
        display: block !important;
    }

    #nav-list > li {
        display: block !important;
        width: 100%;
        margin-bottom: 4px;
    }

    #nav-list > li > a,
    #nav-list > li > button {
        display: flex;
        width: 100%;
        min-height: 42px;
        box-sizing: border-box;
        color: var(--pn-text);
    }

    #nav-list > li > ul {
        position: static;
        width: auto;
        margin: 4px 0 4px 12px !important;
        box-shadow: none;
    }

    #nav-list .home-nav-element {
        display: none !important;
    }

    #user-links {
        height: 56px;
        margin-left: auto;
    }

    #user-links > ul > li > a > span > span {
        display: none;
    }

    #user-links .anon {
        display: none;
    }

    .pnloj-language-select {
        width: 58px;
        padding-right: 8px;
    }

    #content {
        width: calc(100% - 28px);
        margin-top: 74px;
    }

    #page-container {
        box-shadow: none;
    }
}

@media (max-width: 420px) {
    .pnloj-mobile-brand span {
        display: inline;
    }

    .pnloj-language-control {
        padding-left: 8px;
    }

    .pnloj-language-select {
        width: 48px;
        padding-left: 5px;
        font-size: 11px;
    }
}

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

#nav-list > li > a.active {
    color: var(--pn-yellow);
    background: color-mix(in srgb, var(--pn-yellow) 13%, transparent);
    box-shadow: inset 0 -2px 0 var(--pn-yellow);
}

.pnloj-brand-logo {
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--pn-yellow) 42%, transparent);
}

.pnloj-theme-toggle:hover {
    border-color: var(--pn-yellow);
    background: color-mix(in srgb, var(--pn-yellow) 12%, transparent);
    color: var(--pn-yellow);
}

#content > hr {
    height: 2px;
    border: 0;
    background: linear-gradient(90deg, var(--pn-yellow), var(--pn-red), var(--pn-green), var(--pn-blue), transparent 72%);
}

#blog-container {
    gap: 22px;
}

.blog-content {
    margin-right: 0 !important;
}

.sidebox {
    padding: 0 !important;
    margin: 0 0 22px !important;
    overflow: hidden;
    border: 1px solid var(--pn-border) !important;
    border-radius: var(--pn-radius) !important;
    background: var(--pn-surface-raised) !important;
    box-shadow: var(--pn-shadow-md) !important;
}

.sidebox h3 {
    margin: 0 !important;
    border-left: 4px solid var(--pn-yellow);
    border-bottom: 1px solid var(--pn-border);
    background: var(--pn-surface-soft);
    color: var(--pn-text);
    box-shadow: none;
}

.sidebox h3 .fa {
    color: var(--pn-blue);
}

.sidebox-content {
    margin: 0 !important;
    padding: 12px 14px 14px;
    border: 0;
    border-top: 1px solid var(--pn-border);
    background: var(--pn-surface-raised);
}

#blog-container > .blog-content h3 {
    border-left-color: var(--pn-blue);
}

.blog-sidebar .sidebox:nth-child(3n + 1) h3 {
    border-left-color: var(--pn-red);
}

.blog-sidebar .sidebox:nth-child(3n + 2) h3 {
    border-left-color: var(--pn-green);
}

.blog-sidebar .sidebox:nth-child(3n + 3) h3 {
    border-left-color: var(--pn-yellow);
}
.form-area,
.content-description,
.tabs,
.info-float {
    margin-bottom: 20px !important;
    box-shadow: var(--pn-shadow-sm);
}

.table,
table.sortable {
    margin-bottom: 20px;
    border: 1px solid var(--pn-border);
    box-shadow: var(--pn-shadow-sm);
}

#content-left.problems.h-scrollable-table {
    align-self: flex-start;
    margin-bottom: 20px !important;
    overflow-x: auto;
    background: transparent !important;
    box-shadow: none !important;
}

#content-left.problems #problem-table {
    margin-bottom: 0;
}

.alert-info {
    border-left: 4px solid var(--pn-blue) !important;
}

.alert-success,
.alert.success {
    border-left: 4px solid var(--pn-green) !important;
}

.alert-warning,
.alert.warning {
    border-left: 4px solid var(--pn-yellow) !important;
}

.alert-danger,
.alert.error {
    border-left: 4px solid var(--pn-red) !important;
}

footer {
    box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.06);
}

.pnloj-language-control {
    gap: 6px;
    padding: 0 8px 0 10px;
}

.pnloj-language-control i {
    flex: 0 0 auto;
}

.pnloj-language-select {
    width: 52px;
    padding: 0 17px 0 0;
    box-shadow: none !important;
}

.pnloj-language-select:focus {
    border: 0 !important;
    box-shadow: none !important;
}

.pnloj-language-control:focus-within {
    border-color: var(--pn-blue);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--pn-blue) 18%, transparent);
}

html[data-pnloj-theme="light"] #user-links > ul > li > a,
html[data-pnloj-theme="light"] #user-links > ul > li > a > span > span,
html[data-pnloj-theme="light"] .pnloj-theme-toggle,
html[data-pnloj-theme="light"] .pnloj-theme-toggle i,
html[data-pnloj-theme="light"] .pnloj-language-select {
    color: #1a1a1a !important;
}

html[data-pnloj-theme="light"] .pnloj-language-control i {
    color: #3f3f3f !important;
}

html[data-pnloj-theme="dark"] #user-links > ul > li > a,
html[data-pnloj-theme="dark"] #user-links > ul > li > a > span > span,
html[data-pnloj-theme="dark"] .pnloj-theme-toggle,
html[data-pnloj-theme="dark"] .pnloj-theme-toggle i,
html[data-pnloj-theme="dark"] .pnloj-language-select {
    color: #ffffff !important;
}

@media (max-width: 760px) {
    .pnloj-language-select {
        width: 44px;
        padding-right: 14px;
    }
}