/**
 * Shared layout for Class skills pages (English, Science, SST, etc.).
 * Pair with quiz-popup-theme.css + quiz-modal-responsive.css for the modal shell.
 *
 * Usage: add a theme class on <body>, e.g. skills-theme-english
 */
:skillroot {
    --sky: #38bdf8;
    --primary: #6366f1;
    --primary-dark: #4338ca;
    --pink: #f472b6;
    --mint-bright: #10b981;
    --mint: #6ee7b7;
    --sun: #f5a623;
    --purple: #a78bfa;
    --secondary: #f97316;
    --ink: #1f2333;
    --muted: #6b7280;
    --card: #ffffff;
}

/* ---- theme: English ---- */
body.skills-theme-english {
    --skills-bg: #f7f8fc;
    --skills-line: #e7e9f3;
    --skills-accent: var(--primary);
    --skills-header-bg: linear-gradient(135deg, #eef1ff, #fef3f8);
    --skills-eyebrow-color: var(--primary);
    --skills-accent-text: var(--pink);
    --skills-cat-fallback: var(--primary);
}

/* ---- theme: Science ---- */
body.skills-theme-science {
    --skills-bg: #f6faf7;
    --skills-line: #e4ede6;
    --skills-accent: var(--mint-bright);
    --skills-header-bg: linear-gradient(135deg, #eafaf0, #eef7ff);
    --skills-eyebrow-color: var(--mint-bright);
    --skills-accent-text: var(--mint-bright);
    --skills-cat-fallback: var(--mint-bright);
}

/* ---- theme: SST ---- */
body.skills-theme-sst {
    --skills-bg: #fff8f3;
    --skills-line: #f3e3d6;
    --skills-accent: var(--secondary);
    --skills-header-bg: linear-gradient(135deg, #fff1e6, #fef7ec);
    --skills-eyebrow-color: var(--secondary);
    --skills-accent-text: var(--secondary);
    --skills-cat-fallback: var(--secondary);
}

body[data-page="skills"] {
    margin: 0;
    font-family: 'Nunito', sans-serif;
    background: var(--skills-bg, #f7f8fc);
    color: var(--ink);
}

body[data-page="skills"] h1,
body[data-page="skills"] h2 {
    font-family: 'Poppins', sans-serif;
}

body[data-page="skills"] a {
    color: inherit;
}

body[data-page="skills"] .page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 18px 60px;
}

/* ---- subject rail ---- */
.skills-page .subject-rail {
    display: flex;
    gap: 10px;
    flex-wrap: nowrap;
    margin-bottom: 22px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.skills-page .subject-rail::-webkit-scrollbar {
    display: none;
}

.skills-page .subject-node {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    background: var(--card);
    border: 2px solid var(--skills-line);
    text-decoration: none;
    font-weight: 700;
    color: var(--ink);
    transition: 0.2s;
    white-space: nowrap;
    flex: 0 0 auto;
}

.skills-page .subject-node i {
    font-size: 16px;
}

.skills-page .subject-node:hover {
    border-color: var(--skills-accent);
    transform: translateY(-1px);
}

.skills-page .subject-node.active {
    background: var(--skills-accent);
    color: #fff;
    border-color: var(--skills-accent);
}

@media (max-width: 420px) {
    .skills-page .subject-node {
        padding: 9px 14px;
        font-size: 14px;
    }
}

/* ---- header ---- */
.skills-page .skills-header {
    position: relative;
    background: var(--skills-header-bg);
    border-radius: 22px;
    padding: 28px 26px;
    margin-bottom: 26px;
    overflow: hidden;
}

.skills-page .skills-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--skills-eyebrow-color);
    background: #fff;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    margin-bottom: 10px;
}

.skills-page .skills-header h1 {
    margin: 6px 0 8px;
    font-size: clamp(24px, 4vw, 34px);
}

.skills-page .skills-header .accent {
    color: var(--skills-accent-text);
}

.skills-page .skills-header p {
    margin: 0;
    max-width: 680px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.6;
}

/* ---- skills grid ---- */
.skills-page .skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}

.skills-page .skill-category {
    background: var(--card);
    border: 1px solid var(--skills-line);
    border-radius: 16px;
    padding: 18px 18px 8px;
    border-top: 4px solid var(--cat, var(--skills-cat-fallback));
}

.skills-page .skill-category h2 {
    margin: 0 0 10px;
    font-size: 17px;
}

.skills-page .skill-category ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.skills-page .skill-category li {
    border-top: 1px solid var(--skills-line);
}

.skills-page .skill-category li:first-child {
    border-top: none;
}

.skills-page .skill-category a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 4px;
    text-decoration: none;
    font-size: 14.5px;
}

.skills-page .skill-category a:hover {
    color: var(--skills-accent);
}

.skills-page .skill-category .code {
    font-weight: 800;
    color: var(--cat, var(--skills-cat-fallback));
    font-size: 12.5px;
    min-width: 26px;
}

.skills-page .skill-category .name {
    flex: 1;
}

.skills-page .skill-category i.fa-eye {
    opacity: 0.35;
    font-size: 12px;
}