/* Abacadome platform chrome — mobile, tablet, laptop, widescreen */
:root {
    --bg: #07090d;
    --bg-2: #0d1117;
    --panel: #12171f;
    --line: #2a3340;
    --text: #e6edf3;
    --muted: #8b949e;
    --blue: #58a6ff;
    --violet: #a371f7;
    --green: #3fb950;
    --radius: 14px;
    --max: 1120px;
    --max-wide: 1280px;
}
html { scroll-behavior: smooth; }
body.abaca-platform {
    margin: 0;
    background:
        radial-gradient(1200px 500px at 10% -10%, rgba(57, 211, 83, 0.08), transparent 50%),
        radial-gradient(900px 480px at 110% 0%, rgba(255, 123, 114, 0.08), transparent 46%),
        linear-gradient(180deg, #07090d 0%, #0b1220 100%);
    background-attachment: fixed;
    color: var(--text);
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}
body.abaca-platform::before {
    content: "";
    pointer-events: none;
    position: fixed;
    inset: 0;
    z-index: 0;
    opacity: 0.10;
    background-image:
        linear-gradient(rgba(88,166,255,.12) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88,166,255,.12) 1px, transparent 1px);
    background-size: 32px 32px;
}
body.abaca-platform > * { position: relative; z-index: 1; }
.abaca-platform .campus-top {
    background: rgba(7, 9, 13, 0.86);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}
.abaca-platform .campus-top__inner {
    max-width: var(--max-wide);
    min-height: 52px;
}
.abaca-platform .campus-nav a {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.92rem;
    padding: 8px 10px;
    border-radius: 8px;
}
.abaca-platform .campus-nav a:hover,
.abaca-platform .campus-nav a[aria-current="page"] {
    color: var(--text);
    background: #1c2330;
}
.plat-hero {
    padding: 20px 20px 8px;
    text-align: left;
    background:
        radial-gradient(900px 420px at 50% -10%, rgba(88,166,255,.14), transparent 62%),
        radial-gradient(700px 380px at 85% 0%, rgba(163,113,247,.1), transparent 55%);
}
img.mark {
    width: 88px;
    max-width: 88px;
    height: auto;
    display: block;
    border-radius: 16px;
    background: #010409;
}
.plat-kicker {
    margin: 8px 0 6px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 0.68rem;
    font-weight: 800;
    color: var(--violet);
}
.plat-hero h1,
.plat-split h1 {
    margin: 0 0 12px;
    max-width: none;
    font-size: clamp(2.2rem, 4.5vw, 3.2rem);
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -0.03em;
}
.plat-lead {
    margin: 0 0 16px;
    max-width: 36rem;
    color: #c9d1d9;
    font-size: clamp(1.1rem, 1.6vw, 1.28rem);
    line-height: 1.55;
}
.plat-split {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 28px;
    align-items: center;
    max-width: var(--max-wide);
    margin: 0 auto;
    padding: 8px 20px 20px;
}
.plat-split .plat-actions { justify-content: flex-start; }
.plat-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}
.plat-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 18px;
    border-radius: 10px;
    font-weight: 750;
    text-decoration: none;
    border: 1px solid transparent;
}
.plat-btn-primary { background: var(--green); color: #041108; }
.plat-btn-primary:hover { filter: brightness(1.08); }
.plat-btn-accent { background: var(--blue); color: #041018; }
.plat-btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.plat-section {
    padding: 22px 20px 28px;
    border-top: 1px solid var(--line);
}
.plat-wrap { max-width: var(--max); margin: 0 auto; }
.plat-wide { max-width: var(--max-wide); margin: 0 auto; }
.plat-section h2 {
    margin: 0 0 8px;
    text-align: center;
    font-size: clamp(1.4rem, 2.4vw, 1.9rem);
    letter-spacing: -0.02em;
    color: var(--text);
}
.plat-sub {
    text-align: center;
    color: var(--muted);
    max-width: 40rem;
    margin: 0 auto 14px;
}
.plat-grid {
    display: grid;
    gap: 14px;
}
.plat-grid-5 { grid-template-columns: repeat(5, 1fr); }
.plat-grid-3 { grid-template-columns: repeat(3, 1fr); }
.plat-grid-4 { grid-template-columns: repeat(4, 1fr); }
.plat-grid-12 { grid-template-columns: repeat(6, 1fr); }
.plat-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
}
.plat-card h3 { margin: 0 0 8px; font-size: 1.02rem; }
.plat-card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.plat-flow {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    counter-reset: step;
}
.plat-flow article {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 10px 12px 12px;
    text-align: left;
}
.plat-flow article:nth-child(1) { border-color: #3fb950; }
.plat-flow article:nth-child(2) { border-color: #f778ba; }
.plat-flow article:nth-child(3) { border-color: #f1e05a; }
.plat-flow article:nth-child(4) { border-color: #58a6ff; }
.plat-flow article:nth-child(5) { border-color: #a371f7; }
.plat-flow article::before {
    counter-increment: step;
    content: counter(step);
    display: inline-flex;
    width: 24px;
    height: 24px;
    margin-bottom: 10px;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: #1f6feb;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 800;
}
.plat-flow article:nth-child(1)::before { background: #238636; }
.plat-flow article:nth-child(2)::before { background: #bf3989; }
.plat-flow article:nth-child(3)::before { background: #9e6a03; color: #fff; }
.plat-flow article:nth-child(4)::before { background: #1f6feb; }
.plat-flow article:nth-child(5)::before { background: #8957e5; }
.plat-flow h3 { margin: 0 0 6px; font-size: 0.98rem; }
.plat-flow p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.plat-lab {
    display: flex;
    flex-direction: column;
    min-height: 92px;
    padding: 14px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--text);
    text-decoration: none;
}
.plat-lab:hover { border-color: var(--blue); }
.plat-lab strong { font-size: 0.95rem; }
.plat-lab span { margin-top: 4px; color: var(--muted); font-size: 0.8rem; }
.plat-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.plat-chips span {
    padding: 7px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-size: 0.82rem;
    color: var(--muted);
}
.plat-story {
    max-width: 40rem;
    margin: 0 auto;
    text-align: center;
    color: var(--muted);
    font-size: 1.05rem;
}
.plat-foot {
    padding: 16px 20px 24px;
    text-align: center;
    color: var(--muted);
    font-size: 0.88rem;
    border-top: 1px solid var(--line);
}
.plat-foot a { color: var(--blue); text-decoration: none; }
.plat-excerpt {
    max-width: 40rem;
    margin: 0 auto;
    border-color: #3fb950;
    font-size: 1.05rem;
    line-height: 1.65;
    color: var(--text);
}
.plat-excerpt p { color: var(--text); margin: 0 0 12px; }
.plat-peek { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(0,.85fr); gap: 14px; align-items: stretch; }

/* Periodic-table topic tiles */
.ptable {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 8px;
    max-width: none;
    margin: 0;
}
.el {
    display: grid;
    grid-template-rows: auto 1fr auto;
    aspect-ratio: 1 / 1;
    padding: 8px 9px 10px;
    border-radius: 6px;
    text-decoration: none;
    color: #0b1220;
    border: 2px solid rgba(255,255,255,.35);
    box-shadow: 0 8px 24px rgba(0,0,0,.25);
    transition: transform .15s ease, box-shadow .15s ease;
    min-height: 108px;
}
.el:hover { transform: translateY(-3px) scale(1.03); box-shadow: 0 14px 32px rgba(0,0,0,.35); }
.el .z { font-size: 0.7rem; font-weight: 800; opacity: .75; font-variant-numeric: tabular-nums; }
.el .sym { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 800; line-height: 1; letter-spacing: -0.04em; }
.el .name { font-size: 0.72rem; font-weight: 800; margin-top: auto; }
.el .mass { font-size: 0.65rem; opacity: .8; }
.el-ma { background: linear-gradient(160deg, #ffd6a5, #ff9f1c); }
.el-sc { background: linear-gradient(160deg, #bde0fe, #4cc9f0); }
.el-ch { background: linear-gradient(160deg, #caffbf, #80ed99); }
.el-bi { background: linear-gradient(160deg, #ffc6ff, #ff85a1); }
.el-ge { background: linear-gradient(160deg, #e9c46a, #f4a261); }
.el-st { background: linear-gradient(160deg, #c77dff, #9d4edd); color: #fff; }
.el-co { background: linear-gradient(160deg, #8ecae6, #219ebc); color: #041018; }
.el-ai { background: linear-gradient(160deg, #f72585, #b5179e); color: #fff; }
.el-te { background: linear-gradient(160deg, #90e0ef, #00b4d8); }
.el-el { background: linear-gradient(160deg, #fee440, #f15bb5); }
.el-en { background: linear-gradient(160deg, #80ffdb, #64dfdf); }
.el-ro { background: linear-gradient(160deg, #ff6b6b, #f77f00); color: #1a0a00; }
.el-ghost {
    background: #161b22;
    color: #8b949e;
    border-style: dashed;
    opacity: .85;
    cursor: default;
}
.el-ghost:hover { transform: none; box-shadow: none; }
.ptable-legend { text-align: center; margin-top: 14px; color: var(--muted); font-size: 0.85rem; }
.formula {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: #80ed99;
    letter-spacing: 0.08em;
}
@media (min-width: 1440px) {
    .plat-split { padding-top: 16px; }
}
@media (max-width: 1100px) {
    .plat-grid-5 { grid-template-columns: repeat(3, 1fr); }
    .plat-grid-12 { grid-template-columns: repeat(4, 1fr); }
    .plat-flow { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 800px) {
    .plat-grid-5, .plat-grid-3, .plat-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .plat-grid-12 { grid-template-columns: repeat(3, 1fr); }
    .plat-flow { grid-template-columns: 1fr 1fr; }
    .plat-hero { padding: 16px 16px 8px; text-align: center; }
    .plat-split { grid-template-columns: 1fr; padding: 0 16px 16px; }
    .plat-split .plat-actions { justify-content: center; }
    .plat-lead { margin-left: auto; margin-right: auto; }
    .plat-section { padding: 18px 16px 22px; }
    .plat-peek { grid-template-columns: 1fr; }
    .ptable { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
    .plat-grid-5, .plat-grid-3, .plat-grid-4, .plat-grid-12, .plat-flow {
        grid-template-columns: 1fr;
    }
    .plat-hero h1 { max-width: none; }
    .abaca-platform .campus-logo span { display: none; }
    .ptable { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .el { min-height: 96px; aspect-ratio: auto; }
}

/* --- Dynamic 26-Subject Periodic Table Color Classes (v53) --- */
.el-ph { background: linear-gradient(160deg, #fca5a5, #f43f5e); color: #000; }
.el-as { background: linear-gradient(160deg, #d8b4fe, #a855f7); color: #000; }
.el-ea { background: linear-gradient(160deg, #6ee7b7, #10b981); color: #000; }
.el-da { background: linear-gradient(160deg, #93c5fd, #3b82f6); color: #000; }
.el-cy { background: linear-gradient(160deg, #a5b4fc, #6366f1); color: #fff; }
.el-lo { background: linear-gradient(160deg, #fef08a, #f59e0b); color: #000; }
.el-la { background: linear-gradient(160deg, #99f6e4, #14b8a6); color: #000; }
.el-hi { background: linear-gradient(160deg, #fcd34d, #b45309); color: #fff; }
.el-ci { background: linear-gradient(160deg, #67e8f9, #06b6d4); color: #000; }
.el-ec { background: linear-gradient(160deg, #a7f3d0, #10b981); color: #000; }
.el-bu { background: linear-gradient(160deg, #bae6fd, #0284c7); color: #000; }
.el-ar { background: linear-gradient(160deg, #fbcfe8, #ec4899); color: #000; }
.el-mu { background: linear-gradient(160deg, #e9d5ff, #a855f7); color: #fff; }
.el-he { background: linear-gradient(160deg, #fca5a5, #ef4444); color: #fff; }