/* ============================================================
   JP Scientific — shared design system
   One stylesheet, five pages. Edit here, it updates everywhere.
   ============================================================ */

:root {
    --primary: #322757;       /* deep violet — brand, dark sections, headings */
    --primary-dark: #1e163b;  /* darker violet — hero/footer gradients */
    --accent: #3cc3df;        /* brand cyan — interactive elements, one hero moment */
    --text: #211c33;          /* body text */
    --muted: #6b6480;         /* secondary text */
    --bg-light: #f6f4f9;      /* violet-tinted off-white, card fills */
    --line: #e3e0ec;          /* hairline borders */
    --line-strong: #cfc7de;   /* dashed/emphasis borders */
    --radius: 4px;
    --radius-pill: 999px;
    --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: #ffffff;
}

a { color: inherit; }

a:focus-visible, button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; animation: none !important; }
}

/* ---------- Header / nav ---------- */
header {
    background-color: #ffffff;
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1120px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 2rem;
}

.site-logo { height: 44px; width: auto; display: block; }

nav a {
    margin-left: 1.75rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}

nav a:hover, nav a.active {
    color: var(--primary);
    border-bottom-color: var(--accent);
}

/* ---------- Layout ---------- */
.container {
    flex: 1;
    max-width: 1120px;
    margin: 0 auto;
    padding: 3.5rem 2rem;
    width: 100%;
}

h1 {
    color: var(--primary);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
    padding-bottom: 0.5rem;
    margin: 0 0 1.5rem 0;
}

h2 { color: var(--primary); font-weight: 700; letter-spacing: -0.01em; }

p { max-width: 68ch; }

/* ---------- Buttons ---------- */
.btn {
    background-color: var(--primary);
    color: #ffffff;
    padding: 0.8rem 1.6rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-block;
    border: 1px solid var(--primary);
    transition: background-color 0.15s, color 0.15s;
}

.btn:hover { background-color: var(--primary-dark); border-color: var(--primary-dark); }

.btn-invert {
    background-color: #ffffff;
    color: var(--primary);
    border-color: #ffffff;
}

.btn-invert:hover { background-color: transparent; color: #ffffff; }

.btn-quote {
    margin-top: 1rem;
    background-color: transparent;
    color: var(--primary);
    text-align: center;
    padding: 0.65rem 1rem;
    border: 1.5px solid var(--primary);
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background-color 0.15s, color 0.15s;
}

.btn-quote:hover { background-color: var(--primary); color: #ffffff; }

.col-link {
    display: inline-block;
    margin-top: 0.75rem;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
}

.col-link:hover { color: var(--accent); }

/* ---------- Hero (homepage) ---------- */
.hero {
    background:
        linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4.5rem 2rem;
}

.hero-inner {
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
    align-items: center;
}

.hero-content h1 {
    color: #ffffff;
    border-bottom: none;
    padding-bottom: 0;
    font-size: 2.3rem;
    line-height: 1.25;
    margin-bottom: 1.1rem;
}

.nowrap { white-space: nowrap; }

.hero-content p {
    color: #d7d1e8;
    font-size: 1.05rem;
    max-width: 46ch;
    margin-bottom: 1.75rem;
}

.hero-visual { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.85rem; }
.hero-visual svg { width: 100%; max-width: 320px; height: auto; }

.hero-legend { display: flex; flex-wrap: wrap; row-gap: 0.5rem; }
.legend-item { display: flex; align-items: center; font-size: 0.85rem; color: #d7d1e8; margin-right: 1.5rem; white-space: nowrap; }
.legend-item:last-child { margin-right: 0; }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-right: 0.45rem; flex-shrink: 0; }
.legend-dot-polar { background: #4fb286; }
.legend-dot-nonpolar { background: #e8917a; }
.legend-dot-matrix { background: rgba(255,255,255,0.35); border: 1px solid rgba(255,255,255,0.55); }

@media (max-width: 860px) {
    .hero-inner { grid-template-columns: 1fr; text-align: left; }
    .hero-visual { display: none; }
}

/* ---------- Key Advantages / plain section blocks (no card chrome) ---------- */
.section-heading {
    margin: 0 0 0.5rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--line);
}

.three-column-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-top: 2rem;
    margin-bottom: 2.5rem;
    border-top: 1px solid var(--line);
}

.col {
    padding: 1.75rem 1.75rem 1.75rem 0;
    border-right: 1px solid var(--line);
    padding-left: 1.75rem;
}

.col:first-child { padding-left: 0; }
.col:last-child { border-right: none; }

.col h3 { color: var(--primary); margin-top: 0; font-size: 1.05rem; }
.col p { color: var(--muted); font-size: 0.95rem; }

@media (max-width: 1024px) {
    .three-column-row { grid-template-columns: repeat(2, 1fr); }
    .col:nth-child(2) { border-right: none; }
    .col:nth-child(3) { border-left: 1px solid var(--line); padding-left: 1.75rem; }
}

@media (max-width: 768px) {
    .three-column-row { grid-template-columns: 1fr; border-top: none; }
    .col { border-right: none; border-top: 1px solid var(--line); padding-left: 0; }
    .col:first-child { border-top: none; }
}

.full-width-bottom {
    background: var(--bg-light);
    border: 1px solid var(--line);
    color: var(--text);
    padding: 2.5rem 2.5rem;
    border-radius: var(--radius);
}

.full-width-bottom h2 { color: var(--primary); margin-top: 0; font-size: 1.4rem; }
.full-width-bottom p { color: var(--muted); }
.full-width-bottom .btn { background-color: var(--primary); color: #fff; border-color: var(--primary); }
.full-width-bottom .btn:hover { background-color: var(--primary-dark); }

/* ---------- Product / catalog cards ---------- */
.overview { max-width: 68ch; color: var(--muted); }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 1.75rem;
}

.card {
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card-body { padding: 1.4rem; display: flex; flex-direction: column; flex: 1; }
.card h3 { color: var(--primary); margin-top: 0; font-size: 1.05rem; }
.card p { flex: 1; color: var(--muted); font-size: 0.95rem; }

.product-photo { width: 100%; background: var(--bg-light); }
.photo-main { width: 100%; aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.photo-main img { width: 100%; height: 100%; object-fit: cover; display: block; }
.product-photo .placeholder { color: #a79ec2; font-size: 0.85rem; text-align: center; padding: 1rem; }
.product-photo .placeholder svg { display: block; margin: 0 auto 0.5rem auto; opacity: 0.6; }

.photo-thumbs { display: flex; gap: 0.4rem; padding: 0.5rem; background: var(--bg-light); border-top: 1px solid var(--line); overflow-x: auto; }
.photo-thumbs img { width: 46px; height: 46px; object-fit: cover; border-radius: 3px; cursor: pointer; border: 2px solid transparent; opacity: 0.6; flex-shrink: 0; transition: opacity 0.15s, border-color 0.15s; }
.photo-thumbs img:hover { opacity: 1; }
.photo-thumbs img.active { opacity: 1; border-color: var(--accent); }

/* ---------- Badges (technical tags — mono, deliberate use) ---------- */
.badge-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.9rem; }
.badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-pill);
    background: var(--bg-light);
    color: var(--primary);
    border: 1px solid var(--line-strong);
}
.badge.lcms { background: var(--primary); color: #ffffff; border-color: var(--primary); }
.badge.soon { background: #fff3d6; color: #8a6100; border-color: #f0d896; }

/* ---------- Pillar / summary strip ---------- */
.pillar-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1rem; margin: 2rem 0 3rem 0; }
.pillar {
    display: block;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.1rem 1.2rem;
    text-decoration: none;
    transition: border-color 0.15s;
}
.pillar:hover { border-color: var(--accent); }
.pillar .pillar-icon { color: var(--accent); margin-bottom: 0.5rem; }
.pillar h4 { margin: 0 0 0.3rem 0; color: var(--primary); font-size: 0.98rem; }
.pillar span.desc { color: var(--muted); font-size: 0.85rem; }

/* ---------- Category sections (products page) ---------- */
.category-section { margin-top: 2.75rem; }
.category-heading-row { display: flex; align-items: baseline; gap: 0.75rem; border-top: 1px solid var(--line); padding-top: 2.25rem; scroll-margin-top: 90px; }
.category-heading-row h2 { margin: 0; font-size: 1.3rem; }
.category-note { color: var(--muted); font-size: 0.92rem; max-width: 68ch; margin: 0.5rem 0 0 0; }

/* ---------- Applications page ---------- */
.intro { max-width: 68ch; color: var(--muted); }

.app-block {
    width: 100%;
    background: var(--bg-light);
    border: 1px solid var(--line);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
    padding: 2rem 2.25rem;
    margin-top: 1.75rem;
}
.app-block h2 { margin-top: 0; font-size: 1.35rem; }
.app-block > p { max-width: 68ch; color: var(--text); }

.research { margin-top: 1.5rem; border-top: 1px solid var(--line); padding-top: 1.25rem; }
.research h4 { margin: 0 0 0.75rem 0; color: var(--primary); font-size: 0.85rem; font-family: var(--font-mono); font-weight: 600; }
.paper-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.75rem; }
.paper-list li { background: #ffffff; border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: 0.9rem 1.1rem; font-size: 0.92rem; color: var(--muted); }
.paper-list li a { color: var(--primary); font-weight: 600; text-decoration: none; }
.paper-list li a:hover { color: var(--accent); }
.paper-list li .paper-desc { display: block; margin-top: 0.3rem; color: var(--muted); font-size: 0.88rem; }

/* ---------- Contact page ---------- */
.contact-box {
    background: var(--bg-light);
    border: 1px solid var(--line);
    padding: 2rem;
    border-radius: var(--radius);
    margin-top: 1.5rem;
}

/* ---------- Footer ---------- */
footer {
    background-color: var(--primary);
    color: white;
    padding: 3rem 2rem 1rem 2rem;
    margin-top: auto;
    border-top: 1px solid var(--primary-dark);
}

.footer-container {
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
}

.footer-col h3, .footer-col h4 { color: #ffffff; margin-top: 0; margin-bottom: 1rem; font-size: 1rem; }
.footer-col p { font-size: 0.9rem; color: #cdc4e3; margin: 0.3rem 0; }
.footer-col a { color: #cdc4e3; text-decoration: none; display: block; margin-bottom: 0.5rem; font-size: 0.9rem; transition: color 0.15s; }
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.12);
    margin-top: 2.5rem;
    padding-top: 1rem;
    font-size: 0.85rem;
    color: #a89dc4;
}

/* ---------- About page: copy + further-reading card ---------- */
.about-layout {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 2.5rem;
    align-items: start;
}

@media (max-width: 800px) {
    .about-layout { grid-template-columns: 1fr; }
}

.reading-card {
    background: var(--bg-light);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.reading-card h4 {
    margin: 0 0 0.9rem 0;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--primary);
}

.reading-cover {
    aspect-ratio: 3 / 4;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.9rem;
    overflow: hidden;
}

.reading-cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.reading-cover .placeholder { color: #a79ec2; font-size: 0.78rem; text-align: center; padding: 1rem; }
.reading-cover .placeholder svg { display: block; margin: 0 auto 0.5rem auto; opacity: 0.6; }

.reading-title { font-weight: 600; color: var(--text); font-size: 0.92rem; margin: 0 0 0.35rem 0; }
.reading-byline { color: var(--muted); font-size: 0.85rem; margin: 0 0 0.9rem 0; }
.reading-card .col-link { margin-top: 0; }

/* ---------- Coating chemistry badges (on product cards) ---------- */
.coating-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.6rem 0 0.9rem 0; }
.coating-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: var(--radius-pill);
    background: #ffffff;
    color: var(--muted);
    border: 1px solid var(--line-strong);
}
.coating-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-right: 0.3rem;
    align-self: center;
}

/* Applications badges — sit under the coating row, above the description.
   Same visual weight as the coating badges above (uniform pill style),
   distinguished only by their own "Applications:" label. */
.application-row { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0 0 0.9rem 0; }
.application-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    padding: 0.2rem 0.55rem;
    border-radius: var(--radius-pill);
    background: #ffffff;
    color: var(--muted);
    border: 1px solid var(--line-strong);
}
.application-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-right: 0.3rem;
    align-self: center;
}

/* ---------- Inquiry form (hardware "contact if interested") ---------- */
.inquiry-box {
    background: var(--bg-light);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 560px;
    margin-top: 1.5rem;
}
.inquiry-device {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--primary);
    background: #ffffff;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-pill);
    padding: 0.3rem 0.75rem;
    margin-bottom: 1.25rem;
}
.form-row { margin-bottom: 1.1rem; display: flex; flex-direction: column; gap: 0.35rem; }
.form-row label { font-size: 0.88rem; font-weight: 600; color: var(--text); }
.form-row input, .form-row textarea {
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: #ffffff;
    color: var(--text);
}
.form-row input:focus, .form-row textarea:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
    border-color: var(--accent);
}
.form-row textarea { resize: vertical; min-height: 110px; }
.form-names { display: flex; gap: 1rem; }
.form-names .form-row { flex: 1; }
.form-note { font-size: 0.82rem; color: var(--muted); margin-top: 1rem; }