/* ============================================================
   ChemRexn Pages — Unified Design System ("Precision Lab")
   Shared by About · Services · Research · Contact
   Type:  Fraunces · Hanken Grotesk · IBM Plex Mono
   Brand: navy #0C3570 · blue #1E4F9C · green #1B5E20
   Namespace: .rx-
   ============================================================ */

:root {
    --rx-ink:        #0A1F44;
    --rx-navy:       #0C3570;
    --rx-blue:       #1E4F9C;
    --rx-blue-2:     #2E63B8;
    --rx-blue-soft:  #E9F0FB;
    --rx-green:      #1B5E20;
    --rx-green-soft: #E8F1E4;
    --rx-paper:      #FBFBF8;
    --rx-paper-2:    #F1F2EC;
    --rx-line:       rgba(10, 31, 68, .10);
    --rx-line-2:     rgba(10, 31, 68, .06);
    --rx-muted:      #5A6473;
    --rx-muted-2:    #8A93A3;

    --rx-serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;
    --rx-sans:  'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --rx-mono:  'IBM Plex Mono', 'SFMono-Regular', Menlo, monospace;

    --rx-maxw: 1180px;
    --rx-ease: cubic-bezier(.22, 1, .36, 1);
}

/* ---- scope ------------------------------------------------- */
.rx-page * { box-sizing: border-box; }
.rx-page {
    font-family: var(--rx-sans);
    color: var(--rx-ink);
    background: var(--rx-paper);
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
}
.rx-page p { margin: 0; }
.rx-page h1, .rx-page h2, .rx-page h3, .rx-page h4 { margin: 0; font-weight: 400; }
.rx-page a { color: inherit; text-decoration: none; }
.rx-page img { display: block; max-width: 100%; }
.rx-page ul { margin: 0; padding: 0; list-style: none; }

/* ---- primitives -------------------------------------------- */
.rx-wrap { max-width: var(--rx-maxw); margin: 0 auto; padding: 0 2rem; }

.rx-kicker {
    font-family: var(--rx-mono);
    font-size: 11px; letter-spacing: .22em; text-transform: uppercase;
    color: var(--rx-blue);
    display: inline-flex; align-items: center; gap: .6em;
}
.rx-kicker::before { content: ""; width: 22px; height: 1px; background: var(--rx-blue); display: inline-block; }

.rx-h2 {
    font-family: var(--rx-serif);
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.08; letter-spacing: -.015em; font-weight: 400;
}
.rx-h3 { font-family: var(--rx-serif); font-size: 22px; letter-spacing: -.01em; }
.rx-lead { font-size: 16px; line-height: 1.7; color: var(--rx-muted); max-width: 54ch; }

.rx-btn {
    --b: var(--rx-blue);
    display: inline-flex; align-items: center; gap: .55em;
    font-family: var(--rx-sans); font-size: 14px; font-weight: 600; letter-spacing: .01em;
    padding: .85em 1.5em; border-radius: 2px;
    border: 1px solid var(--b); background: var(--b); color: #fff; cursor: pointer;
    transition: transform .25s var(--rx-ease), box-shadow .25s;
}
.rx-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -12px rgba(30,79,156,.55); }
.rx-btn .ti { font-size: 16px; }
.rx-btn--green { --b: var(--rx-green); }
.rx-btn--ghost { background: transparent; color: var(--rx-ink); border-color: var(--rx-line); }
.rx-btn--ghost:hover { border-color: var(--rx-ink); box-shadow: none; }
.rx-btn--on-dark { background: #fff; color: var(--rx-navy); border-color: #fff; }
.rx-btn--on-dark:hover { box-shadow: 0 12px 28px -12px rgba(255,255,255,.4); }
.rx-btn--ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.28); }
.rx-btn--ghost-light:hover { border-color: #fff; box-shadow: none; }

.rx-textlink {
    font-family: var(--rx-mono); font-size: 12px; letter-spacing: .04em; color: var(--rx-blue);
    display: inline-flex; align-items: center; gap: .4em; transition: gap .2s var(--rx-ease);
}
.rx-textlink:hover { gap: .75em; }

/* ---- section shell ----------------------------------------- */
.rx-section { padding: clamp(3.5rem, 6vw, 6rem) 0; }
.rx-section--paper2 { background: var(--rx-paper-2); }
.rx-section--navy {
    background:
        radial-gradient(90% 120% at 90% 0%, rgba(46,99,184,.35), transparent 55%),
        linear-gradient(160deg, #0B2C5E, #0C3570);
    color: #fff;
}
.rx-section__head { margin-bottom: 2.5rem; }
.rx-section__head .rx-h2 { margin-top: .9rem; max-width: 20ch; }
.rx-section__head--split { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }

/* ====================================================================
   PAGE HERO (shared)
   ==================================================================== */
.rx-phero {
    position: relative; overflow: hidden; isolation: isolate;
    background:
        radial-gradient(110% 120% at 85% 0%, rgba(46,99,184,.5) 0%, transparent 55%),
        radial-gradient(70% 90% at 0% 100%, rgba(27,94,32,.32) 0%, transparent 50%),
        linear-gradient(160deg, #0B2C5E 0%, #0C3570 50%, #103E84 100%);
    color: #fff;
}
.rx-phero__grid-bg {
    position: absolute; inset: 0; z-index: -1;
    background-image:
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 46px 46px;
    -webkit-mask-image: radial-gradient(110% 100% at 75% 0%, #000 35%, transparent 78%);
            mask-image: radial-gradient(110% 100% at 75% 0%, #000 35%, transparent 78%);
}
.rx-phero__inner { padding: clamp(3.5rem, 7vw, 6.5rem) 2rem clamp(3rem, 5vw, 5rem); }
.rx-phero__kicker { color: #9DC0F2; margin-bottom: 1.4rem; display: inline-flex; }
.rx-phero__kicker::before { background: #9DC0F2; }
.rx-phero__title {
    font-family: var(--rx-serif); font-weight: 400;
    font-size: clamp(36px, 5.5vw, 60px); line-height: 1.04; letter-spacing: -.025em;
    max-width: 18ch;
}
.rx-phero__title em { font-style: italic; color: #BFE3C2; }
.rx-phero__lead {
    margin-top: 1.5rem; font-size: 17px; line-height: 1.7;
    color: rgba(255,255,255,.72); max-width: 54ch;
}

/* ====================================================================
   STAT STRIP
   ==================================================================== */
.rx-stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rx-line); }
.rx-stat { padding: 1.8rem; }
.rx-stat + .rx-stat { border-left: 1px solid var(--rx-line); }
.rx-stat__num { font-family: var(--rx-serif); font-size: 38px; line-height: 1; color: var(--rx-ink); }
.rx-stat__num small { font-size: .5em; color: var(--rx-green); vertical-align: super; margin-left: 2px; }
.rx-stat__label { font-family: var(--rx-mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--rx-muted); margin-top: .6rem; }

/* ====================================================================
   FEATURE / CAPABILITY GRID
   ==================================================================== */
.rx-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.rx-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.rx-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }

.rx-feature {
    border: 1px solid var(--rx-line); background: var(--rx-paper); border-radius: 5px;
    padding: 1.6rem 1.5rem; display: flex; flex-direction: column; gap: .8rem;
    transition: transform .3s var(--rx-ease), box-shadow .3s var(--rx-ease), border-color .3s;
}
.rx-feature:hover { transform: translateY(-4px); box-shadow: 0 22px 44px -26px rgba(10,31,68,.35); border-color: rgba(30,79,156,.4); }
.rx-feature__ico {
    width: 46px; height: 46px; border-radius: 4px; display: flex; align-items: center; justify-content: center;
    font-size: 22px; background: var(--rx-blue-soft); color: var(--rx-blue);
}
.rx-feature:nth-child(even) .rx-feature__ico { background: var(--rx-green-soft); color: var(--rx-green); }
.rx-feature__t { font-family: var(--rx-serif); font-size: 20px; letter-spacing: -.01em; }
.rx-feature__d { font-size: 14px; line-height: 1.6; color: var(--rx-muted); }
.rx-feature__no { font-family: var(--rx-mono); font-size: 11px; letter-spacing: .1em; color: var(--rx-muted-2); }

/* plain capability (no border) */
.rx-cap { display: flex; flex-direction: column; gap: .8rem; }
.rx-cap__ico { width: 44px; height: 44px; border-radius: 3px; display: flex; align-items: center; justify-content: center; font-size: 21px; background: #fff; border: 1px solid var(--rx-line); color: var(--rx-blue); }
.rx-cap:nth-child(even) .rx-cap__ico { color: var(--rx-green); }
.rx-cap__t { font-family: var(--rx-serif); font-size: 19px; }
.rx-cap__d { font-size: 13.5px; line-height: 1.6; color: var(--rx-muted); }

/* ====================================================================
   SPLIT (text + panel)
   ==================================================================== */
.rx-split { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: center; }
.rx-split--wide-left { grid-template-columns: 1.1fr .9fr; }
.rx-prose p + p { margin-top: 1rem; }
.rx-prose .rx-lead { margin-top: 1.2rem; }
.rx-checklist { margin-top: 1.6rem; display: flex; flex-direction: column; gap: .9rem; }
.rx-checklist li { display: flex; align-items: flex-start; gap: .7em; font-size: 15px; line-height: 1.5; }
.rx-checklist .ti { color: var(--rx-green); font-size: 18px; margin-top: 1px; flex-shrink: 0; }

/* decorative molecule panel (CSS only) */
.rx-panel {
    position: relative; aspect-ratio: 1 / 1; border-radius: 6px; overflow: hidden;
    background:
        radial-gradient(circle at 30% 30%, rgba(46,99,184,.16), transparent 45%),
        radial-gradient(circle at 75% 70%, rgba(27,94,32,.14), transparent 45%),
        var(--rx-paper-2);
    border: 1px solid var(--rx-line);
    display: flex; align-items: center; justify-content: center;
}
.rx-panel__grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(var(--rx-line-2) 1px, transparent 1px),
        linear-gradient(90deg, var(--rx-line-2) 1px, transparent 1px);
    background-size: 32px 32px;
}
.rx-panel__formula { position: relative; font-family: var(--rx-serif); font-size: clamp(40px, 7vw, 76px); color: var(--rx-navy); letter-spacing: .01em; }
.rx-panel__formula sub { font-size: .55em; }
.rx-panel__tag {
    position: absolute; bottom: 1.2rem; left: 1.2rem;
    font-family: var(--rx-mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
    color: var(--rx-muted); background: rgba(255,255,255,.7); padding: .4em .7em; border-radius: 2px;
    border: 1px solid var(--rx-line);
}

/* ====================================================================
   PROCESS FLOW
   ==================================================================== */
.rx-flow { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--rx-line); }
.rx-flow--4 { grid-template-columns: repeat(4, 1fr); }
.rx-step { padding: 2.2rem 1.8rem; position: relative; }
.rx-step + .rx-step { border-left: 1px solid var(--rx-line); }
.rx-step__no { font-family: var(--rx-mono); font-size: 12px; letter-spacing: .1em; color: var(--rx-blue); margin-bottom: 1.4rem; display: block; }
.rx-step__t { font-family: var(--rx-serif); font-size: 22px; margin-bottom: .7rem; }
.rx-step__d { font-size: 14px; line-height: 1.65; color: var(--rx-muted); }
.rx-section--navy .rx-flow { border-color: rgba(255,255,255,.16); }
.rx-section--navy .rx-step + .rx-step { border-color: rgba(255,255,255,.16); }
.rx-section--navy .rx-step__no { color: #9DC0F2; }
.rx-section--navy .rx-step__d { color: rgba(255,255,255,.7); }

/* ====================================================================
   PRICING / TIER CARDS (research page)
   ==================================================================== */
.rx-tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.rx-tier {
    border: 1px solid var(--rx-line); border-radius: 6px; background: var(--rx-paper);
    padding: 1.8rem 1.6rem; display: flex; flex-direction: column; gap: 1rem;
}
.rx-tier--featured { border-color: var(--rx-blue); box-shadow: 0 22px 50px -30px rgba(30,79,156,.5); position: relative; }
.rx-tier--featured::before {
    content: "Most popular"; position: absolute; top: -10px; left: 1.6rem;
    font-family: var(--rx-mono); font-size: 9.5px; letter-spacing: .14em; text-transform: uppercase;
    background: var(--rx-blue); color: #fff; padding: .35em .7em; border-radius: 2px;
}
.rx-tier__name { font-family: var(--rx-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--rx-blue); }
.rx-tier__price { font-family: var(--rx-serif); font-size: 34px; color: var(--rx-ink); }
.rx-tier__price small { font-family: var(--rx-sans); font-size: 13px; color: var(--rx-muted-2); }
.rx-tier__list { display: flex; flex-direction: column; gap: .7rem; margin-top: .4rem; }
.rx-tier__list li { display: flex; align-items: flex-start; gap: .6em; font-size: 14px; line-height: 1.5; color: var(--rx-muted); }
.rx-tier__list .ti { color: var(--rx-green); font-size: 17px; margin-top: 1px; flex-shrink: 0; }
.rx-tier .rx-btn { margin-top: auto; justify-content: center; }

/* ====================================================================
   FAQ / ACCORDION
   ==================================================================== */
.rx-faq { border-top: 1px solid var(--rx-line); }
.rx-faq__item { border-bottom: 1px solid var(--rx-line); }
.rx-faq__q {
    width: 100%; text-align: left; background: none; border: none; cursor: pointer;
    padding: 1.4rem 0; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    font-family: var(--rx-serif); font-size: 19px; color: var(--rx-ink);
}
.rx-faq__q .ti { font-size: 20px; color: var(--rx-blue); transition: transform .3s var(--rx-ease); flex-shrink: 0; }
.rx-faq__item.is-open .rx-faq__q .ti { transform: rotate(45deg); }
.rx-faq__a { max-height: 0; overflow: hidden; transition: max-height .35s var(--rx-ease); }
.rx-faq__a-inner { padding-bottom: 1.4rem; font-size: 15px; line-height: 1.7; color: var(--rx-muted); max-width: 70ch; }

/* ====================================================================
   CONTACT
   ==================================================================== */
.rx-contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 3.5rem; align-items: start; }
.rx-form { display: flex; flex-direction: column; gap: 1.4rem; }
.rx-field { display: flex; flex-direction: column; gap: .5rem; }
.rx-field label { font-family: var(--rx-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--rx-blue); }
.rx-field input, .rx-field textarea, .rx-field select {
    font-family: var(--rx-sans); font-size: 15px; padding: .9em 1em;
    border: 1px solid var(--rx-line); border-radius: 3px; background: #fff; color: var(--rx-ink);
    transition: border-color .25s, box-shadow .25s;
}
.rx-field input:focus, .rx-field textarea:focus, .rx-field select:focus {
    outline: none; border-color: var(--rx-blue); box-shadow: 0 0 0 3px var(--rx-blue-soft);
}
.rx-field textarea { resize: vertical; min-height: 150px; }
.rx-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; }
.rx-form__submit { align-self: flex-start; }

.rx-flash { padding: 1rem 1.2rem; border-radius: 3px; font-size: 14px; margin-bottom: 1.6rem; display: flex; align-items: center; gap: .6em; }
.rx-flash .ti { font-size: 18px; }
.rx-flash--success { background: var(--rx-green-soft); color: #14501A; border: 1px solid #14501A; }
.rx-flash--error { background: #FDECEC; color: #B3261E; border: 1px solid #E5A1A1; }

.rx-info { display: flex; flex-direction: column; gap: 1.8rem; }
.rx-info__block { display: flex; flex-direction: column; gap: .6rem; }
.rx-info__title { font-family: var(--rx-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--rx-muted); }
.rx-info__item { font-size: 15px; line-height: 1.6; display: flex; align-items: flex-start; gap: .8em; }
.rx-info__item i { font-size: 16px; color: var(--rx-blue); margin-top: 1px; flex-shrink: 0; }
.rx-info__item a:hover { color: var(--rx-green); }
.rx-map { width: 100%; height: 280px; border-radius: 5px; border: 1px solid var(--rx-line); overflow: hidden; margin-top: .5rem; }
.rx-map iframe { width: 100%; height: 100%; border: none; display: block; }

/* ====================================================================
   CTA BAND
   ==================================================================== */
.rx-cta {
    position: relative; overflow: hidden; isolation: isolate; border-radius: 8px;
    background: radial-gradient(90% 140% at 100% 0%, rgba(46,99,184,.5), transparent 55%), linear-gradient(135deg, #0C3570, #16407E);
    color: #fff; padding: clamp(2.4rem, 4vw, 3.4rem);
    display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
}
.rx-cta::before {
    content: ""; position: absolute; inset: 0; z-index: -1;
    background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 38px 38px;
    -webkit-mask-image: radial-gradient(100% 100% at 100% 0%, #000, transparent 70%);
            mask-image: radial-gradient(100% 100% at 100% 0%, #000, transparent 70%);
}
.rx-cta__kicker { color: #BFE3C2; margin-bottom: 1rem; }
.rx-cta__kicker::before { background: #BFE3C2; }
.rx-cta h2 { font-family: var(--rx-serif); font-size: clamp(24px, 3.2vw, 36px); line-height: 1.12; letter-spacing: -.02em; max-width: 18ch; }
.rx-cta p { margin-top: .9rem; color: rgba(255,255,255,.72); max-width: 42ch; font-size: 15px; line-height: 1.65; }
.rx-cta__btns { display: flex; gap: .8rem; flex-wrap: wrap; }

/* ====================================================================
   SCROLL REVEAL
   ==================================================================== */
.rx-reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s var(--rx-ease), transform .7s var(--rx-ease); }
.rx-reveal.is-in { opacity: 1; transform: none; }
.rx-reveal--d1 { transition-delay: .08s; }
.rx-reveal--d2 { transition-delay: .16s; }
.rx-reveal--d3 { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
    .rx-reveal { opacity: 1; transform: none; transition: none; }
    .rx-btn:hover, .rx-feature:hover { transform: none; }
}

/* ====================================================================
   RESPONSIVE
   ==================================================================== */
@media (max-width: 1000px) {
    .rx-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .rx-grid-3, .rx-tiers { grid-template-columns: 1fr; }
    .rx-split, .rx-split--wide-left, .rx-contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .rx-flow, .rx-flow--4 { grid-template-columns: 1fr; }
    .rx-step + .rx-step { border-left: none; border-top: 1px solid var(--rx-line); }
    .rx-stats { grid-template-columns: repeat(2, 1fr); }
    .rx-stat:nth-child(3) { border-left: none; }
    .rx-stat:nth-child(n+3) { border-top: 1px solid var(--rx-line); }
    .rx-panel { max-width: 460px; }
}
@media (max-width: 600px) {
    .rx-wrap, .rx-phero__inner { padding-left: 1.25rem; padding-right: 1.25rem; }
    .rx-grid-2, .rx-grid-4 { grid-template-columns: 1fr; }
    .rx-stats { grid-template-columns: 1fr; }
    .rx-stat + .rx-stat { border-left: none; border-top: 1px solid var(--rx-line); }
    .rx-form__row { grid-template-columns: 1fr; }
    .rx-cta { flex-direction: column; align-items: flex-start; }
    .rx-section__head--split { flex-direction: column; align-items: flex-start; }
}