/* =======================================================================
   EngineersCalc — Engineering Design Selectors Hub v1.0
   Scoped to .ec-selectors-hub. Designed to sit beside the Workflows hub.
   Uses the site's EC tokens where present, with local fallbacks.
   ======================================================================= */

.ec-selectors-hub {
    --esh-paper: var(--ec-bg, #ffffff);
    --esh-canvas: var(--ec-bg-off, #f6f8fb);
    --esh-panel: var(--ec-bg-panel, #f2f5f9);
    --esh-line: var(--ec-border-light, #e3e8f0);
    --esh-line-strong: var(--ec-border-strong, #bbc7d5);
    --esh-ink: var(--ec-black-mid, #182638);
    --esh-ink-deep: var(--ec-dark, #101b29);
    --esh-slate: var(--ec-slate, #43556c);
    --esh-muted: var(--ec-soft, #5c6e83);
    --esh-blue: var(--ec-info-color, #2360a6);
    --esh-blue-pale: var(--ec-info-bg, #edf5ff);
    --esh-radius: var(--ec-radius-xl, 14px);
    color: var(--esh-ink);
    background: var(--esh-canvas);
    padding-bottom: 62px;
    font-family: inherit;
}
.ec-selectors-hub *,
.ec-selectors-hub *::before,
.ec-selectors-hub *::after { box-sizing: border-box; }
.ec-selectors-hub .ec-container {
    width: min(100% - 44px, 1120px);
    margin-inline: auto;
}
.ec-selectors-hub a { text-decoration: none; }
.ec-selectors-hub a:focus-visible,
.ec-selectors-hub button:focus-visible,
.ec-selectors-hub input:focus-visible,
.ec-selectors-hub summary:focus-visible {
    outline: 3px solid var(--esh-blue);
    outline-offset: 3px;
}
.ec-selectors-hub [hidden] { display: none !important; }

/* Hero — reuses the workflow hub's quiet graph-paper language */
.ec-selectors-hero {
    position: relative;
    overflow: hidden;
    background: var(--esh-paper);
    border-bottom: 1px solid var(--esh-line);
    padding: 54px 0 52px;
}
.ec-selectors-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, var(--esh-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--esh-line) 1px, transparent 1px);
    background-size: 34px 34px;
    opacity: .45;
}
.ec-selectors-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
    align-items: center;
    gap: clamp(28px, 6vw, 76px);
}
.ec-selectors-hero-copy { max-width: 665px; }
.ec-selectors-eyebrow, .ec-selectors-overline {
    margin: 0 0 14px;
    font-size: 11px;
    line-height: 1.4;
    font-weight: 800;
    color: var(--esh-muted);
    text-transform: uppercase;
    letter-spacing: .10em;
}
.ec-selectors-eyebrow { display: flex; align-items: center; gap: 9px; }
.ec-selectors-dot, .ec-selectors-visual-status {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 100%;
    background: var(--esh-blue);
    flex: 0 0 auto;
}
.ec-selectors-hero h1 {
    margin: 0 0 17px;
    font-size: clamp(33px, 4.2vw, 54px);
    line-height: 1.1;
    letter-spacing: -.035em;
    font-weight: 800;
    color: var(--esh-ink-deep);
}
.ec-selectors-lead {
    max-width: 590px;
    font-size: clamp(16px, 1.5vw, 18px);
    line-height: 1.67;
    color: var(--esh-muted);
    margin: 0 0 23px;
}
.ec-selectors-traits { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 27px; }
.ec-selectors-traits span {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    color: var(--esh-slate);
    border: 1px solid var(--esh-line);
    background: var(--esh-paper);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 650;
}
.ec-selectors-primary-link, .ec-selector-card-link {
    display: inline-flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 750;
    padding: 12px 17px;
    border-radius: 9px;
    background: var(--esh-ink-deep);
    color: #ffffff !important;
    transition: background .15s ease, transform .15s ease;
}
.ec-selectors-primary-link:hover, .ec-selector-card-link:hover {
    background: var(--esh-blue);
    color: #ffffff !important;
    transform: translateY(-1px);
}
.ec-selectors-primary-link span, .ec-selector-card-link span { font-size: 17px; }

/* Schematic is intentionally conceptual, not a dimensioned engineering drawing. */
.ec-selectors-hero-visual {
    border: 1px solid var(--esh-line-strong);
    background: var(--esh-paper);
    border-radius: 13px;
    padding: 17px;
    box-shadow: 0 10px 28px rgba(15, 39, 75, .07);
    position: relative;
}
.ec-selectors-visual-head, .ec-selectors-visual-foot,
.ec-selector-featured-visual-top, .ec-selector-featured-visual-bottom {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 10px;
    font-weight: 750;
    line-height: 1.4;
    letter-spacing: .10em;
    color: var(--esh-muted);
}
.ec-selectors-visual-head { padding-bottom: 14px; border-bottom: 1px solid var(--esh-line); }
.ec-selectors-visual-head > span:last-child { margin-left: auto; font-weight: 550; }
.ec-selectors-visual-status { width: 6px; height: 6px; }
.ec-selectors-visual-stage {
    margin-top: 10px;
    border: 1px solid var(--esh-line);
    padding: 12px 12px;
    display: flex;
    align-items: center;
    gap: 13px;
    border-radius: 8px;
    background: #fff;
}
.ec-selectors-visual-stage > b {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    background: var(--esh-panel);
    color: var(--esh-blue);
    font-size: 12px;
    border-radius: 7px;
}
.ec-selectors-visual-stage > div { min-width: 0; flex: 1; }
.ec-selectors-visual-stage strong { display: block; font-size: 13px; line-height: 1.5; color: var(--esh-ink); }
.ec-selectors-visual-stage small { display: block; font-size: 11px; line-height: 1.4; color: var(--esh-muted); }
.ec-selectors-visual-stage > span { color: var(--esh-blue); font-size: 18px; }
.ec-selectors-visual-stage--result { background: var(--esh-blue-pale); border-color: #c8daef; }
.ec-selectors-visual-stage--result svg { width: 42px; height: 38px; stroke: var(--esh-blue); }
.ec-selectors-visual-foot { margin-top: 16px; justify-content: center; font-size: 9px; }

/* Spacing/sections */
.ec-selectors-main > section { margin-top: 49px; scroll-margin-top: 28px; }
.ec-selectors-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 44px;
}
.ec-selectors-intro h2,
.ec-selectors-section-title h2 {
    margin: 0;
    color: var(--esh-ink-deep);
    font-size: clamp(23px, 2.5vw, 31px);
    font-weight: 780;
    line-height: 1.22;
    letter-spacing: -.025em;
}
.ec-selectors-intro > p { margin: 0; font-size: 14px; line-height: 1.8; color: var(--esh-muted); }
.ec-selectors-section-title {
    margin-bottom: 19px;
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 15px;
}
.ec-selectors-section-title .ec-selectors-overline { margin-bottom: 7px; }
.ec-selectors-total {
    vertical-align: middle;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    border-radius: 99px;
    border: 1px solid var(--esh-line);
    color: var(--esh-slate);
    background: var(--esh-paper);
    min-width: 29px;
    height: 27px;
    padding-inline: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
}
.ec-selectors-count-status { color: var(--esh-muted); font-size: 12px; margin: 0 0 2px; }

/* Catalog controls */
.ec-selectors-toolbar { margin: 0 0 17px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; }
.ec-selectors-search {
    display: flex;
    align-items: center;
    gap: 9px;
    min-width: 275px;
    width: min(100%, 390px);
    border: 1px solid var(--esh-line-strong);
    background: var(--esh-paper);
    border-radius: 9px;
    padding: 0 12px;
    color: var(--esh-muted);
}
.ec-selectors-search:focus-within { border-color: var(--esh-blue); box-shadow: 0 0 0 2px rgba(35,96,166,.10); }
.ec-selectors-search svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 1.8; flex-shrink: 0; }
.ec-selectors-search input {
    min-width: 0;
    width: 100%;
    background: transparent;
    color: var(--esh-ink);
    border: 0;
    box-shadow: none;
    border-radius: 0;
    padding: 11px 0;
    font-family: inherit;
    font-size: 13px;
    line-height: 1.4;
}
.ec-selectors-search input:focus { outline: none; box-shadow: none; }
.ec-selectors-search input::placeholder { color: var(--esh-muted); opacity: .9; }
.ec-selectors-filters { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.ec-selectors-filters button,
.ec-selectors-no-results button {
    background: var(--esh-paper);
    color: var(--esh-slate);
    border: 1px solid var(--esh-line);
    padding: 8px 12px;
    border-radius: 7px;
    cursor: pointer;
    font-family: inherit;
    font-size: 12px;
    font-weight: 650;
    transition: background .15s ease, border-color .15s ease;
}
.ec-selectors-filters button:hover { border-color: var(--esh-blue); }
.ec-selectors-filters button.is-active { color: var(--esh-blue); border-color: #b8d1ed; background: var(--esh-blue-pale); }

/* Cards */
.ec-selectors-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px; }
.ec-selector-card {
    position: relative;
    min-width: 0;
    border-radius: 13px;
    border: 1px solid var(--esh-line);
    border-left: 4px solid var(--esh-blue);
    background: var(--esh-paper);
    box-shadow: 0 4px 18px rgba(15,39,75,.035);
    overflow: hidden;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.ec-selector-card:hover { border-color: var(--esh-line-strong); border-left-color: var(--esh-blue); box-shadow: 0 10px 24px rgba(15,39,75,.075); }
.ec-selector-card-body { padding: 22px 24px 23px; display: flex; flex-direction: column; min-height: 100%; }
.ec-selector-card--featured { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); }
.ec-selector-card--featured .ec-selector-card-body { padding: 27px 30px; }
.ec-selector-card-topline { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.ec-selector-card-type {
    padding: 5px 9px;
    font-size: 11px;
    font-weight: 750;
    border-radius: 5px;
    background: var(--esh-blue-pale);
    color: var(--esh-blue);
}
.ec-selector-card-availability { display: inline-flex; gap: 6px; align-items: center; font-size: 11px; font-weight: 700; color: var(--esh-slate); }
.ec-selector-card-availability > span { display: inline-block; height: 6px; width: 6px; border-radius: 50%; background: #2e8e73; }
.ec-selector-card-icon { display: grid; place-items: center; height: 43px; width: 43px; background: var(--esh-panel); border: 1px solid var(--esh-line); border-radius: 8px; margin-bottom: 13px; }
.ec-selector-card-icon svg { height: 30px; width: 30px; stroke: var(--esh-blue); stroke-width: 1.6; }
.ec-selector-card-group { color: var(--esh-muted); text-transform: uppercase; letter-spacing: .07em; font-size: 11px; font-weight: 750; margin: 0 0 6px; }
.ec-selector-card h3 { font-size: clamp(18px, 2vw, 23px); line-height: 1.3; font-weight: 760; margin: 0 0 10px; letter-spacing: -.015em; }
.ec-selector-card h3 a { color: var(--esh-ink-deep); }
.ec-selector-card h3 a:hover { color: var(--esh-blue); }
.ec-selector-card-description { color: var(--esh-muted); font-size: 14px; line-height: 1.68; margin: 0 0 18px; max-width: 610px; }
.ec-selector-card-io { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: auto 0 18px; }
.ec-selector-card-io > div { background: var(--esh-canvas); border: 1px solid var(--esh-line); border-radius: 8px; padding: 11px 12px; min-width: 0; }
.ec-selector-card-io span { font-size: 10px; letter-spacing: .09em; font-weight: 800; color: var(--esh-blue); }
.ec-selector-card-io p { margin: 4px 0 0; font-size: 12px; line-height: 1.55; color: var(--esh-slate); }
.ec-selector-card-link { align-self: flex-start; padding: 10px 15px; font-size: 12px; }

/* Editorial illustration for the FIRST selector only */
.ec-selector-featured-visual { display: flex; flex-direction: column; background: #f0f5fa; border-left: 1px solid var(--esh-line); padding: 18px 18px 13px; }
.ec-selector-featured-visual-top { justify-content: space-between; color: #526b88; }
.ec-selector-featured-visual-top span { opacity: .7; }
.ec-selector-featured-visual svg { display: block; flex: 1; width: 100%; min-height: 225px; max-height: 310px; }
.ec-selector-featured-visual-bottom { justify-content: flex-end; color: #526b88; font-size: 9px; }
.ec-svg-centerline { stroke: #7291b4; stroke-width: 1; stroke-dasharray: 10 4 2 4; }
.ec-svg-plate-a { fill: #c8d7e6; stroke: #718da9; stroke-width: 1.6; }
.ec-svg-plate-b { fill: #dbe5ef; stroke: #718da9; stroke-width: 1.6; }
.ec-svg-void { fill: #f1f6fa; stroke: #a2b7c9; stroke-width: 1; stroke-dasharray: 3 2; }
.ec-svg-bolt { fill: #708ba7; stroke: #2c4c6b; stroke-width: 1.5; }
.ec-svg-head { fill: #345c7c; stroke: #243d59; stroke-width: 1.5; }
.ec-svg-spring { fill: #c99740; stroke: #755c38; stroke-width: 1.2; }
.ec-svg-washer { fill: #99badb; stroke: #507599; stroke-width: 1.2; }
.ec-svg-nut { fill: #819fb9; stroke: #304f6b; stroke-width: 1.5; }
.ec-svg-thread { fill: none; stroke: #dfeaf2; stroke-width: 1.3; }
.ec-svg-dim { fill: none; stroke: #4e7499; stroke-width: 1; }
.ec-svg-dim-text { fill: #395d7e; font-family: Arial, sans-serif; font-size: 11px; font-weight: 700; }
.ec-svg-part-text { fill: #516d85; font-family: Arial, sans-serif; font-size: 10px; font-weight: 600; }

/* Empty states */
.ec-selectors-no-results, .ec-selectors-empty-state { border: 1px dashed var(--esh-line-strong); border-radius: 12px; background: var(--esh-paper); padding: 26px; }
.ec-selectors-no-results strong, .ec-selectors-empty-state h3 { font-size: 17px; color: var(--esh-ink); margin: 0; }
.ec-selectors-no-results p, .ec-selectors-empty-state p { color: var(--esh-muted); font-size: 14px; line-height: 1.7; margin: 6px 0 13px; }
.ec-selectors-empty-state { display: flex; align-items: start; gap: 14px; }
.ec-selectors-empty-icon { display: grid; place-items: center; width: 42px; height: 42px; flex-shrink: 0; color: var(--esh-blue); background: var(--esh-blue-pale); border-radius: 8px; font-size: 26px; }
.ec-selectors-empty-state p { margin-bottom: 0; }

/* Selector families */
.ec-selectors-families-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.ec-selectors-family { border: 1px solid var(--esh-line); background: var(--esh-paper); border-radius: 12px; padding: 23px 24px 22px; }
.ec-selectors-family-icon { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--esh-line); border-radius: 8px; background: var(--esh-panel); color: var(--esh-blue); font-size: 25px; font-weight: 700; margin-bottom: 13px; }
.ec-selectors-family h3, .ec-selectors-steps h3, .ec-selectors-compare-grid h3 { color: var(--esh-ink); font-size: 17px; font-weight: 750; line-height: 1.4; margin: 0 0 9px; }
.ec-selectors-family > p { margin: 0; color: var(--esh-muted); font-size: 13px; line-height: 1.75; }
.ec-selectors-family .ec-selectors-family-example { margin-top: 12px; color: var(--esh-slate); font-size: 12px; font-weight: 600; }

/* Process */
.ec-selectors-steps { padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; list-style: none; counter-reset: none; }
.ec-selectors-steps li { min-width: 0; padding: 21px; background: var(--esh-paper); border-radius: 12px; border: 1px solid var(--esh-line); }
.ec-selectors-step-num { display: inline-flex; margin-bottom: 18px; color: var(--esh-blue); font-size: 21px; font-weight: 800; letter-spacing: -.02em; }
.ec-selectors-steps p { color: var(--esh-muted); font-size: 13px; line-height: 1.7; margin: 0; }

/* Engineering assurance — neutral treatment */
.ec-selectors-assurance { display: flex; gap: 16px; background: var(--esh-panel); border: 1px solid var(--esh-line); padding: 23px; border-radius: 11px; }
.ec-selectors-assurance-mark { display: grid; place-items: center; width: 28px; height: 28px; flex-shrink: 0; border-radius: 50%; border: 1px solid var(--esh-line-strong); background: var(--esh-paper); color: var(--esh-blue); font-size: 16px; font-weight: 800; font-family: Georgia, serif; }
.ec-selectors-assurance h2 { font-size: 16px; margin: 0 0 6px; color: var(--esh-ink); font-weight: 750; }
.ec-selectors-assurance p { font-size: 13px; line-height: 1.75; color: var(--esh-slate); margin: 0; }

/* Compare */
.ec-selectors-compare-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.ec-selectors-compare-grid > div { background: var(--esh-paper); border: 1px solid var(--esh-line); border-radius: 11px; padding: 20px; display: flex; flex-direction: column; }
.ec-selectors-compare-grid > div.is-current { border-color: #c0d6ef; background: var(--esh-blue-pale); }
.ec-selectors-compare-grid p { color: var(--esh-muted); line-height: 1.7; font-size: 13px; flex: 1; margin: 0 0 17px; }
.ec-selectors-compare-grid a { color: var(--esh-blue); font-weight: 750; font-size: 12px; }
.ec-selectors-compare-grid a:hover { text-decoration: underline; }
.ec-selectors-current-label, .ec-selectors-link-muted { font-size: 12px; font-weight: 700; color: var(--esh-muted); }

/* FAQ */
.ec-selectors-faq-list { background: var(--esh-paper); border: 1px solid var(--esh-line); border-radius: 12px; overflow: hidden; }
.ec-selectors-faq-list details + details { border-top: 1px solid var(--esh-line); }
.ec-selectors-faq-list summary { display: flex; align-items: center; justify-content: space-between; cursor: pointer; padding: 17px 20px; color: var(--esh-ink); font-size: 14px; font-weight: 700; gap: 16px; list-style: none; }
.ec-selectors-faq-list summary::-webkit-details-marker { display: none; }
.ec-selectors-faq-list summary::after { content: '+'; font-size: 21px; font-weight: 500; color: var(--esh-blue); }
.ec-selectors-faq-list details[open] summary::after { content: '−'; }
.ec-selectors-faq-list details p { padding: 0 20px 18px; margin: 0; color: var(--esh-muted); font-size: 13px; line-height: 1.8; max-width: 850px; }

/* Bottom nav */
.ec-selectors-bottom-nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px; padding-top: 22px; margin-top: 42px; border-top: 1px solid var(--esh-line); }
.ec-selectors-bottom-nav a { font-size: 13px; color: var(--esh-slate); font-weight: 650; }
.ec-selectors-bottom-nav a:hover { color: var(--esh-blue); }

@media (max-width: 960px) {
    .ec-selectors-hero-grid { grid-template-columns: minmax(0, 1.2fr) minmax(270px, .8fr); gap: 26px; }
    .ec-selector-card--featured { grid-template-columns: 1fr minmax(250px, .75fr); }
    .ec-selector-card-io { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
    .ec-selectors-hub .ec-container { width: min(100% - 34px, 1120px); }
    .ec-selectors-hero { padding: 35px 0 34px; }
    .ec-selectors-hero-grid { grid-template-columns: 1fr; }
    .ec-selectors-hero h1 { font-size: clamp(29px, 7.5vw, 39px); }
    .ec-selectors-hero-visual { max-width: 480px; width: 100%; }
    .ec-selectors-main > section { margin-top: 36px; }
    .ec-selectors-intro { grid-template-columns: 1fr; gap: 13px; }
    .ec-selectors-grid, .ec-selectors-families-grid, .ec-selectors-steps { grid-template-columns: 1fr; }
    .ec-selector-card--featured { grid-column: auto; grid-template-columns: 1fr; }
    .ec-selector-card--featured .ec-selector-card-body { padding: 22px; }
    .ec-selector-featured-visual { border-left: none; border-top: 1px solid var(--esh-line); }
    .ec-selector-featured-visual svg { max-height: 235px; }
    .ec-selectors-compare-grid { grid-template-columns: 1fr; }
    .ec-selectors-section-title { align-items: start; flex-direction: column; }
    .ec-selectors-search { width: 100%; }
    .ec-selectors-toolbar { flex-direction: column; }
    .ec-selector-card-io { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 430px) {
    .ec-selectors-traits { gap: 5px; }
    .ec-selectors-traits span { font-size: 11px; }
    .ec-selector-card-io { grid-template-columns: 1fr; }
    .ec-selectors-assurance { padding: 18px; }
    .ec-selector-card-body { padding: 19px; }
}
@media (prefers-reduced-motion: reduce) {
    .ec-selectors-hub *, .ec-selectors-hub *::before, .ec-selectors-hub *::after {
        transition-duration: .01ms !important;
        animation-duration: .01ms !important;
        scroll-behavior: auto !important;
    }
}