@import url("https://fonts.googleapis.com/css2?family=Fira+Code:wght@300..700&display=swap");

.theme-rp {
    --rp-base: #191724;
    --rp-surface: #1f1d2e;
    --rp-overlay: #26233a;
    --rp-muted: #6e6a86;
    --rp-subtle: #908caa;
    --rp-text: #e0def4;
    --rp-love: #eb6f92;
    --rp-gold: #f6c177;
    --rp-rose: #ebbcba;
    --rp-pine: #31748f;
    --rp-foam: #9ccfd8;
    --rp-iris: #c4a7e7;
    --rp-highlight-low: #21202e;
    --rp-highlight-med: #403d52;
    --rp-highlight-high: #524f67;
}

.theme-rp-moon {
    --rp-base: #232136;
    --rp-surface: #2a273f;
    --rp-overlay: #393552;
    --rp-muted: #6e6a86;
    --rp-subtle: #908caa;
    --rp-text: #e0def4;
    --rp-love: #eb6f92;
    --rp-gold: #f6c177;
    --rp-rose: #ea9a97;
    --rp-pine: #3e8fb0;
    --rp-foam: #9ccfd8;
    --rp-iris: #c4a7e7;
    --rp-highlight-low: #2a283e;
    --rp-highlight-med: #44415a;
    --rp-highlight-high: #56526e;
}

.theme-rp-dawn {
    --rp-base: #faf4ed;
    --rp-surface: #fffaf3;
    --rp-overlay: #f2e9e1;
    --rp-muted: #9893a5;
    --rp-subtle: #797593;
    --rp-text: #575279;
    --rp-love: #b4637a;
    --rp-gold: #ea9d34;
    --rp-rose: #d7827e;
    --rp-pine: #286983;
    --rp-foam: #56949f;
    --rp-iris: #907aa9;
    --rp-highlight-low: #f4ede8;
    --rp-highlight-med: #dfdad9;
    --rp-highlight-high: #cecacd;
}

body {
    font-family: "Fira Code", Consolas, Menlo, monospace;
    background: var(--rp-base);
    min-height: 100vh;
    margin: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
}

a {
    text-decoration: none;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--rp-overlay);
    color: var(--rp-text);
    padding: 0.75rem 2rem;
    font-size: 1.2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-start,
.navbar-end {
    flex: 1;
    display: flex;
    align-items: center;
}

.navbar-start {
    justify-content: flex-start;
}

.navbar-end {
    justify-content: flex-end;
}

.navbar-home {
    font-weight: bold;
    color: var(--rp-iris);
    font-size: 1.3rem;
    letter-spacing: 1px;
}

.navbar-select {
    background: var(--rp-surface);
    color: var(--rp-text);
    border: 1px solid var(--rp-foam);
    border-radius: 0.5rem;
    padding: 0.3rem 1rem;
    margin: 0 1rem;
    font-size: 1rem;
    outline: none;
    text-align: center;
    text-align-last: center;
    min-width: 120px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.navbar-link {
    display: flex;
    align-items: center;
    padding: 0.2rem;
    color: var(--rp-base);
    background: var(--rp-rose);
    border-radius: 1rem;
    transition: background 0.2s;
}

.navbar-link:hover {
    color: var(--rp-text);
    background: var(--rp-love);
}

.container {
    max-width: 90%;
    margin: 0 auto;
    padding: 0 1rem;
    margin-top: 2.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(20rem, 1fr));
    gap: 3rem;
}

.card-link {
    text-decoration: none;
}

.card {
    background: var(--rp-surface);
    color: var(--rp-text);
    border-radius: 1rem;
    box-shadow: 0 2px 8px var(--rp-highlight-low);
    transition: box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    min-height: 220px;
}

.card:hover {
    box-shadow: 0 4px 16px var(--rp-pine);
}

.card-header {
    background: var(--rp-overlay);
    color: var(--rp-love);
    border-top-left-radius: 1rem;
    border-top-right-radius: 1rem;
    padding: 1rem;
    text-align: center;
}

.card-title {
    margin: 0;
    font-size: 1.25rem;
    color: var(--rp-gold);
}

.card-stats {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
}

.stat-total {
    color: var(--rp-rose);
}

.stat-solved {
    color: var(--rp-foam);
}

.stat-total,
.stat-solved {
    text-align: center;
    flex: 1;
}

.stat-title {
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.card-progress {
    width: 90%;
    margin: 0.5rem auto 1rem auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card-progress-percentage {
    font-size: 0.9rem;
    color: var(--rp-love);
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.card-progress-bar {
    width: 100%;
    height: 0.75rem;
    background: var(--rp-overlay);
    border-radius: 0.5rem;
    overflow: hidden;
}

.card-progress-fill {
    height: 100%;
    background: var(--rp-love);
    border-radius: 0.5rem;
    transition: width 0.4s;
}

@media (max-width: 600px) {
    .navbar {
        justify-content: flex-start;
        flex-direction: column;
        align-items: stretch;
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }

    .navbar-end {
        width: 100%;
        justify-content: flex-end;
        gap: 0.5rem;
        margin-top: 0.5rem;
    }

    .navbar-title {
        font-size: 1.1rem;
    }

    .card-title {
        font-size: 1rem;
    }

    .stat-row {
        max-width: 100%;
    }
}

.topic-title {
    text-align: center;
    margin: 2rem 0 1.5rem 0;
    color: var(--rp-love);
    font-size: 2rem;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(25rem, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.problem-card {
    background: var(--rp-surface);
    color: var(--rp-text);
    border-radius: 0.5rem;
    box-shadow: 0 1px 4px var(--rp-highlight-low);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    min-height: 2.5rem;
    font-size: 1rem;
    transition: box-shadow 0.2s;
}

.problem-card:hover {
    box-shadow: 0 2px 8px var(--rp-pine);
}

.problem-card-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--rp-gold);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.problem-card-status {
    width: 0.9rem;
    height: 0.9rem;
    border-radius: 50%;
    display: inline-block;
    margin-left: 0.5rem;
    border: 2px solid var(--rp-highlight-med);
}

.problem-card-status.solved {
    background: var(--rp-foam);
    border-color: var(--rp-foam);
}

.problem-card-status.unsolved {
    background: var(--rp-love);
    border-color: var(--rp-love);
}

.problem-title {
    color: var(--rp-love);
    text-decoration: none;
}

.problem-title a {
    color: var(--rp-love);
    text-decoration: none;
}

.problem-title a:hover {
    text-decoration: underline;
}

.problem-code-block {
    margin: 0 auto;
    background: var(--rp-overlay);
    border-radius: 0.75rem;
    box-shadow: 0 1px 4px var(--rp-highlight-low);
    padding: 2rem;
    overflow-x: auto;
}

.problem-code-block pre {
    margin: 0;
    background: transparent;
    border: none;
    font-size: 1.05rem;
    line-height: 1.5;
    font-family: "Fira Code", "Consolas", "Menlo", monospace !important;
}

.problem-code-block code {
    background: transparent;
    color: var(--rp-text);
    font-size: inherit;
    font-family: inherit;
    padding: 0;
}

td.hljs-ln-numbers {
    min-width: 1em !important;
    padding-right: 0.5em !important;
    text-align: right;
    color: var(--rp-muted);
    border-right: 1px solid var(--rp-highlight-low);
    background: var(--rp-overlay) !important;
}

td.hljs-ln-code {
    padding-left: 0.5em !important;
}

.hljs-meta,
.hljs-comment {
    color: var(--rp-muted);
}

.hljs-tag,
.hljs-doctag,
.hljs-selector-id,
.hljs-selector-class,
.hljs-regexp,
.hljs-template-tag,
.hljs-selector-pseudo,
.hljs-selector-attr,
.hljs-variable.language_,
.hljs-deletion {
    color: var(--rp-love);
}

.hljs-variable,
.hljs-template-variable,
.hljs-number,
.hljs-literal,
.hljs-type,
.hljs-params,
.hljs-link,
.hljs-code,
.hljs-formula,
.hljs-section {
    color: var(--rp-rose);
}

.hljs-built_in,
.hljs-attribute {
    color: var(--rp-gold);
}

.hljs-selector-tag,
.hljs-quote,
.hljs-string,
.hljs-symbol,
.hljs-bullet,
.hljs-addition {
    color: var(--rp-pine);
}

.hljs-keyword,
.hljs-title.function_,
.hljs-title,
.hljs-title.class_,
.hljs-title.class_.inherited__,
.hljs-subst,
.hljs-property,
.hljs-selector-tag {
    color: var(--rp-foam);
}

.hljs-name,
.hljs-keyword,
.hljs-operator,
.hljs-keyword,
.hljs-char.escape_,
.hljs-attr {
    color: var(--rp-iris);
}

.hljs-punctuation {
    color: var(--rp-text);
}

.hljs {
    background: var(--rp-base);
    color: var(--rp-text);
}

.hljs-emphasis {
    font-style: italic;
}

.hljs-strong {
    font-weight: bold;
}

.hljs-ln-code *::selection,
.hljs-ln-code *::-moz-selection,
.hljs-ln-code::selection,
.hljs-ln-code::-moz-selection {
    background: var(--rp-highlight-high);
}

.copyright-footer {
    margin-top: 3rem;
    padding: 1.5rem 0 1rem 0;
    text-align: center;
    color: var(--rp-iris);
    background: none;
    font-size: 0.95rem;
    letter-spacing: 0.03em;
}

.copyright-footer a {
    color: var(--rp-foam);
    text-decoration: none;
}
.copyright-footer a:hover {
    text-decoration: underline;
}