.skills {
    background-color: var(--bg);
    color: var(--fg);
    z-index: 0;
}

.section-container {
    max-width: 1000px;
    margin: 0 auto;
}

.section-header-wrapper {
    margin: 0 0 var(--space-6) 0;
}

.section-header {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding: 0;
}

@media (max-width: 640px) {
    .section-header {
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: none;
        margin: 0 calc(-1 * var(--space-3));
        padding: 0 var(--space-3);
    }
    .section-header::-webkit-scrollbar { display: none; }
    .section-header button { white-space: nowrap; flex: 0 0 auto; }
    .skill-item, .language-bar { padding: var(--space-2) var(--space-3); }
    .skill-name, .language-name { font-size: var(--text-sm); }
    .language-name { min-width: 4rem; }
}

.section-header button {
    padding: 0.4rem 0.9rem;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    font-weight: 500;
    border: 1px solid var(--border);
    background-color: transparent;
    color: var(--fg-muted);
    cursor: pointer;
    transition: color 120ms ease, border-color 120ms ease, background-color 120ms ease;
}

.section-header button::before {
    content: '› ';
    color: var(--fg-mute3);
}

.section-header button:hover {
    color: var(--fg);
    border-color: var(--accent);
}

.section-header button.active {
    color: var(--fg);
    border-color: var(--accent);
    background-color: rgba(215, 38, 56, 0.12);
}

.section-header button.active::before {
    color: var(--accent);
}

.section-content { display: none; }
.section-content.active { display: block; }

.category-title {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    margin-bottom: var(--space-4);
    color: var(--accent);
    font-weight: 500;
}

.skill-item,
.language-bar {
    background: var(--bg-chrome);
    border-radius: 4px;
    padding: var(--space-3) var(--space-4);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: background-color 150ms ease, border-color 150ms ease;
    border: 1px solid transparent;
}

.skill-item { position: relative; }
.language-bar { width: 100%; }

.skill-item:hover,
.language-bar:hover {
    border-color: var(--border);
}

.skill-item.tip-open { z-index: 10000; }

.skill-name {
    flex-grow: 1;
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--fg);
}

.skills__logo {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.info-icon {
    font-size: var(--text-base);
    color: var(--fg-mute3);
    cursor: pointer;
    transition: color 120ms ease;
}

.info-icon:hover {
    color: var(--accent);
}

.info-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    right: 0;
    max-width: 280px;
    padding: var(--space-2) var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    line-height: 1.5;
    color: var(--fg);
    background: rgba(12, 12, 12, 0.96);
    border: 1px solid var(--border);
    border-radius: 4px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, .35);
    z-index: 10001;

    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity .18s ease, transform .18s ease, visibility 0s linear .18s;
    pointer-events: none;
}

.info-tooltip::after {
    content: "";
    position: absolute;
    top: 100%;
    right: 1.2rem;
    border: 8px solid transparent;
    border-top-color: rgba(12, 12, 12, 0.92);
}

.info-tooltip.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity .18s ease, transform .18s ease;
    pointer-events: auto;
}

@media (max-width: 420px) {
    .info-tooltip {
        bottom: auto;
        top: calc(100% + 8px);
    }
    .info-tooltip::after {
        top: -16px;
        transform: rotate(180deg);
    }
}

.languages-grid {
    display: grid;
    grid-template-columns: 1fr minmax(240px, 360px);
    gap: var(--space-8);
    margin-top: var(--space-4);
}

@media (max-width: 860px) {
    .languages-grid {
        grid-template-columns: 1fr;
    }
}

.language-name {
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--fg);
    min-width: 5rem;
}

.bar-wrapper {
    flex-grow: 1;
    margin: 0 var(--space-3);
}

.bar {
    width: 100%;
    height: 6px;
    background-color: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.fill {
    height: 100%;
    background-color: var(--accent);
    border-radius: 3px;
    transition: width 0.4s ease;
    width: var(--fill-pct, 100%);
}

.level-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--fg-mute2);
    min-width: 3rem;
    text-align: right;
}

.cefr-legend {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--fg-mute3);
    text-align: center;
    margin-top: var(--space-3);
}

.language-staircase {
    display: flex;
    flex-direction: row;
    gap: var(--space-3);
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    margin: var(--space-4) 0;
    list-style: none;
}

.language-staircase .level {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.language-staircase .label {
    padding: 1px 6px;
    height: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--fg);
    border-radius: 2px;
    white-space: nowrap;
}

.language-staircase .level .step {
    width: 100%;
    height: 1.2rem;
    border-radius: 2px;
}

.level-A1 .label, .level-A1 .step { background-color: #e67e22; }
.level-A2 .label, .level-A2 .step { background-color: #3498db; }
.level-B1 .label, .level-B1 .step { background-color: #f1c40f; }
.level-B2 .label, .level-B2 .step { background-color: #27ae60; }
.level-C1 .label, .level-C1 .step { background-color: #2ecc71; }
.level-C2 .label, .level-C2 .step { background-color: #1abc9c; }

@media (max-width: 768px) {
    .language-staircase { gap: var(--space-2); }
    .language-staircase .step { width: 1rem; height: 1rem; }
}

.skills__md-heading {
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
}
.skills__md-heading .tok-accent { color: var(--accent); margin-right: 0.4em; }

.skills__md-comment {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--comment);
    margin-bottom: var(--space-6);
}

.category-title::before {
    content: "## ";
    color: var(--accent);
}