@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400;12..96,600;12..96,700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;600&display=swap');
/* ═══ MEUC Shared Styles ═══ */
:root {
  --bg:#EEF2F0;--bg2:#FFFFFF;--bg3:#E7EDEB;--bg4:#DCE5E2;
  --border:#DBE4E1;--border2:#C7D4D0;
  --accent:#2E6FB0;--accent2:#405CA6;--accent3:#E58A2E;
  --text:#12302B;--text2:#4C635E;--text3:#7A8E89;
  --mono:'JetBrains Mono',ui-monospace,monospace;--head:'Bricolage Grotesque',system-ui,sans-serif;--body:'Inter',system-ui,sans-serif;
  --radius:14px;--radius-sm:9px;
}
body.dark{--bg:#0E1614;--bg2:#16211E;--bg3:#1D2A27;--bg4:#26352F;--border:#293733;--border2:#35463F;--accent:#D6A644;--accent2:#6E9BD1;--accent3:#EE8A3C;--text:#E9F0ED;--text2:#A6B8B2;--text3:#7C8F89}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:var(--bg);color:var(--text);font-family:var(--body)}

/* ═══ MEUC Hub ═══ */
.meuc-hub{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:60px 24px}
.meuc-hero{text-align:center;margin-bottom:48px}
.meuc-logo{font-size:52px;font-weight:900;letter-spacing:-2px}.meuc-logo span{color:var(--accent)}
.meuc-subtitle{font-size:14px;color:var(--text2);margin-top:4px;letter-spacing:1px}
.meuc-desc{font-size:15px;color:var(--text3);margin-top:12px}
.meuc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;max-width:1100px;width:100%}
.meuc-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;cursor:pointer;transition:all .2s;text-decoration:none;color:var(--text);position:relative;overflow:hidden}
.meuc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent);opacity:0;transition:opacity .2s}
.meuc-card:hover{border-color:var(--border2);transform:translateY(-3px);background:var(--bg3)}
.meuc-card:hover::before{opacity:1}
.meuc-card.disabled{opacity:.4;cursor:default;pointer-events:none}
.meuc-card-icon{font-size:32px;margin-bottom:12px}
.meuc-card h2{font-size:20px;font-weight:700;margin-bottom:8px}
.meuc-card p{font-size:13px;color:var(--text2);line-height:1.5}
.meuc-card-tag{display:inline-block;margin-top:14px;font-size:10px;padding:3px 10px;border-radius:4px;background:rgba(255,255,255,.05);color:var(--text3)}
.meuc-card-tag.available{background:rgba(181,130,42,.1);color:var(--accent)}
.meuc-footer{margin-top:48px}

/* ═══ App Layout ═══ */
.app{display:flex;height:100vh;overflow:hidden}
.sidebar{width:260px;min-width:260px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow-y:auto}
.sidebar-logo{padding:24px 20px 18px;border-bottom:1px solid var(--border)}
.brand{font-size:20px;font-weight:800;letter-spacing:-.5px}.brand span{color:var(--accent)}
.sub{font-size:11px;color:var(--text3);margin-top:3px;letter-spacing:.5px}
.sidebar-section{padding:14px 16px 4px;font-size:10px;color:var(--text3);letter-spacing:1.5px;text-transform:uppercase}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;cursor:pointer;border-radius:var(--radius-sm);margin:2px 8px;transition:all .15s;font-size:13px;color:var(--text2);border:1px solid transparent}
.nav-item:hover{background:var(--bg3);color:var(--text)}
.nav-item.active{background:rgba(181,130,42,.08);color:var(--accent);border-color:rgba(181,130,42,.2)}
.nav-icon{width:26px;height:26px;border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;background:var(--bg4);flex-shrink:0}
.nav-item.active .nav-icon{background:rgba(181,130,42,.15)}
.nav-label{flex:1;line-height:1.3}.nav-label small{display:block;font-size:10px;color:var(--text3);margin-top:1px}
.nav-item.active .nav-label small{color:rgba(181,130,42,.5)}
.sidebar-footer{margin-top:auto;padding:14px;border-top:1px solid var(--border)}
.main{flex:1;overflow-y:auto}

/* ═══ Page ═══ */
.page{padding:40px 44px 80px;max-width:960px}
.page-header{margin-bottom:32px}
.breadcrumb{font-size:12px;color:var(--text3);margin-bottom:10px;cursor:pointer}.breadcrumb:hover{color:var(--accent)}
.page-header h1{font-size:30px;font-weight:800;letter-spacing:-.5px}
.page-header p{font-size:14px;color:var(--text2);margin-top:8px;line-height:1.6;max-width:600px}

/* ═══ Buttons ═══ */
.btn{padding:9px 18px;border-radius:var(--radius-sm);border:1px solid var(--border2);background:transparent;color:var(--text);font-size:13px;cursor:pointer;transition:all .15s}
.btn:hover{background:var(--bg3);border-color:var(--accent)}
.btn.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:500}
.btn.btn-primary:hover{filter:brightness(1.06)}
.btn.btn-danger{border-color:rgba(238,138,60,.4);color:var(--accent3)}.btn.btn-danger:hover{background:rgba(238,138,60,.1)}
.btn.btn-sm{padding:5px 12px;font-size:12px}

/* ═══ Formula Display ═══ */
.formula-block{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:18px 22px;margin-bottom:28px}
.f-label{font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);margin-bottom:8px}
.f-eq{font-family:var(--mono);font-size:14px;color:var(--accent2);background:var(--bg3);padding:10px 14px;border-radius:var(--radius-sm);border-left:3px solid var(--accent2);margin-bottom:4px}
.f-desc{font-size:13px;color:var(--text2);margin-top:8px;line-height:1.6}
.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 4px;font-size:12px}
.frac .num{border-bottom:1px solid var(--accent2);padding:0 4px 2px;line-height:1.2}
.frac .den{padding:2px 4px 0;line-height:1.2}
.sqrt{display:inline-flex;align-items:center;vertical-align:middle}.sqrt::before{content:'√';font-size:16px;margin-right:1px}.sqrt .inner{border-top:1px solid var(--accent2);padding:0 4px}

/* ═══ Parameters ═══ */
.params-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:28px}
.param-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;transition:border-color .15s}
.param-card:focus-within{border-color:rgba(181,130,42,.4)}
.p-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}
.p-name{font-size:13px;font-weight:500}.p-symbol{font-size:11px;color:var(--accent2);background:rgba(64,92,166,.08);padding:2px 7px;border-radius:4px}
.p-desc{font-size:11px;color:var(--text2);margin-bottom:9px;line-height:1.4}
.param-input-row{display:flex;align-items:center;gap:8px}
.param-input-row input{flex:1;background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius-sm);color:var(--text);font-family:var(--mono);font-size:14px;padding:7px 11px;outline:none;transition:border-color .15s}
.param-input-row input:focus{border-color:var(--accent)}
.p-unit{font-size:11px;color:var(--text3);min-width:40px;text-align:right}
.unit-select{background:var(--bg4);border:1px solid var(--border2);border-radius:6px;color:var(--accent2);font-size:11px;padding:6px 4px;outline:none;cursor:pointer;min-width:62px}

/* ═══ Results ═══ */
.results-section{margin-top:4px}
.r-label{font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:var(--text3);margin-bottom:12px}
.results-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.result-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:16px;position:relative;overflow:hidden}
.result-card::before{content:'';position:absolute;bottom:0;left:0;right:0;height:2px}
.result-card.primary::before{background:var(--accent)}.result-card.secondary::before{background:var(--accent2)}.result-card.tertiary::before{background:var(--accent3)}
.r-name{font-size:10px;letter-spacing:.5px;text-transform:uppercase;color:var(--text3);margin-bottom:5px}
.r-value{font-size:26px;font-weight:800;letter-spacing:-1px}
.result-card.primary .r-value{color:var(--accent)}.result-card.secondary .r-value{color:var(--accent2)}.result-card.tertiary .r-value{color:var(--accent3)}
.r-unit{font-size:11px;color:var(--text3);margin-top:2px}
.r-interp{font-size:11.5px;color:var(--text2);margin-top:8px;line-height:1.5;border-top:1px solid var(--border);padding-top:8px}

/* ═══ Misc ═══ */
.section-divider{border:none;border-top:1px solid var(--border);margin:28px 0}
.section-title{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.section-title .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex-shrink:0}
.calc-note{background:rgba(238,138,60,.08);border:1px solid rgba(238,138,60,.25);border-radius:var(--radius-sm);padding:11px 14px;font-size:12px;color:var(--accent3);line-height:1.5}
.save-bar{position:sticky;bottom:0;background:linear-gradient(transparent,var(--bg) 30%);padding:20px 0 0;display:flex;align-items:center;gap:10px;margin-top:28px}
.save-status{font-size:12px;color:var(--text3);flex:1}.save-status.saved{color:var(--accent)}

/* ═══ Material Bar ═══ */
.mat-bar{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;margin-bottom:24px}
.mat-bar-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.mat-bar-label{font-size:13px;font-weight:500;display:flex;align-items:center;gap:7px}
.mat-toggle{display:flex;gap:3px;background:var(--bg3);border-radius:7px;padding:3px}
.mat-toggle button{border:none;background:transparent;color:var(--text2);font-size:12px;padding:5px 12px;border-radius:5px;cursor:pointer;transition:all .15s}
.mat-toggle button.active{background:var(--accent2);color:#fff;font-weight:500}
.mat-selectors{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.mat-select{width:100%;background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius-sm);color:var(--text);font-size:13px;padding:8px 10px;outline:none;cursor:pointer}

/* ═══ Modal ═══ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);display:flex;align-items:center;justify-content:center;z-index:100;backdrop-filter:blur(4px)}
.modal{background:var(--bg2);border:1px solid var(--border2);border-radius:16px;padding:28px;width:420px;max-width:90vw}
.modal h2{font-size:20px;font-weight:800;margin-bottom:6px}
.modal p{font-size:13px;color:var(--text2);margin-bottom:20px;line-height:1.5}
.modal input,.modal textarea{width:100%;background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius-sm);color:var(--text);font-size:14px;padding:10px 14px;outline:none;margin-bottom:14px}
.modal-select{width:100%;background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius-sm);color:var(--text);font-size:14px;padding:10px 14px;outline:none;cursor:pointer;margin-bottom:14px}
.modal-footer{display:flex;gap:8px;justify-content:flex-end;margin-top:4px}
.modal label{font-size:11px;color:var(--text3);letter-spacing:.8px;text-transform:uppercase;display:block;margin-bottom:6px}

/* ═══ Images ═══ */
.img-upload-area{margin-top:20px}
.img-grid{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.img-thumb{position:relative;width:120px;height:90px;border-radius:8px;overflow:hidden;border:1px solid var(--border);cursor:pointer}
.img-thumb img{width:100%;height:100%;object-fit:cover}
.img-del{position:absolute;top:3px;right:3px;background:rgba(0,0,0,.7);color:#fff;border:none;border-radius:50%;width:20px;height:20px;cursor:pointer;font-size:11px;display:flex;align-items:center;justify-content:center}
.img-add{width:120px;height:90px;border:2px dashed var(--border2);border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;color:var(--text3);font-size:12px}

/* ═══ Scrollbar ═══ */
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--bg4);border-radius:3px}
@media print{.sidebar,.mat-bar,.save-bar,.img-upload-area{display:none!important}.main{margin:0!important}}
@media (max-width:700px){.sidebar{width:64px;min-width:64px}.params-grid,.results-grid{grid-template-columns:1fr}.page{padding:24px 20px 60px}.mat-selectors{grid-template-columns:1fr}}

/* ═══ Calculation Builder ═══ */
.builder-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:16px}
.b-input{background:var(--bg3);border:1px solid var(--border2);border-radius:var(--radius-sm);color:var(--text);font-family:var(--body);font-size:13px;padding:8px 12px;outline:none;transition:border-color .15s}
.b-input:focus{border-color:var(--accent)}
.b-formula{font-family:var(--mono);font-size:13px;color:var(--accent2)}
textarea.b-input{font-family:var(--body)}

/* Unit Picker */
.unit-picker{position:relative;display:inline-block}
.unit-pick-btn{background:var(--bg4);border:1px solid var(--border2);border-radius:6px;color:var(--accent2);font-size:12px;padding:6px 10px;cursor:pointer;white-space:nowrap;transition:all .15s}
.unit-pick-btn:hover{border-color:var(--accent2)}
.unit-dropdown{position:absolute;top:100%;left:0;background:var(--bg2);border:1px solid var(--border2);border-radius:var(--radius);width:260px;max-height:300px;overflow-y:auto;z-index:50;box-shadow:0 8px 24px rgba(0,0,0,.4);margin-top:4px}
.unit-search{width:100%;background:var(--bg3);border:none;border-bottom:1px solid var(--border);color:var(--text);font-size:12px;padding:10px 12px;outline:none}
.unit-group-label{font-size:10px;color:var(--text3);letter-spacing:1px;text-transform:uppercase;padding:8px 12px 4px;background:var(--bg3)}
.unit-option{display:flex;align-items:center;gap:8px;padding:7px 12px;cursor:pointer;transition:background .1s;font-size:12px}
.unit-option:hover{background:var(--bg3)}
.unit-sym{font-family:var(--mono);color:var(--accent2);min-width:50px;font-weight:500}
.unit-name{color:var(--text2)}

.home-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:18px;cursor:pointer;transition:all .2s;position:relative;overflow:hidden}
.home-card:hover{border-color:var(--border2);background:var(--bg3);transform:translateY(-2px)}

/* ═══ Charitools integration ═══ */
.eng-back{position:absolute;top:22px;left:24px;font-size:13px;font-weight:600;color:var(--text2);text-decoration:none;display:inline-flex;align-items:center;gap:6px;padding:8px 13px;border:1px solid var(--border);border-radius:999px;background:var(--bg2);transition:.15s}
.eng-back:hover{color:var(--accent);border-color:var(--accent)}
.eng-logo{width:66px;height:66px;object-fit:contain;margin-bottom:14px;filter:drop-shadow(0 4px 12px rgba(20,40,36,.14))}
.meuc-hub{position:relative}
.meuc-logo{font-family:var(--head)}

/* Charitools polish v2 */
.eng-logo{background:#fff;border:1px solid var(--border2);border-radius:16px;padding:8px;width:74px;height:74px;box-shadow:0 4px 14px rgba(20,40,36,.12)}
.hub-search{display:flex;align-items:center;gap:9px;margin:20px auto 0;max-width:420px;background:var(--bg2);border:1.5px solid var(--border2);border-radius:999px;padding:10px 16px}
.hub-search svg{width:17px;height:17px;stroke:var(--text3);fill:none;stroke-width:2;flex:none}
.hub-search input{flex:1;border:none;background:transparent;outline:none;color:var(--text);font:inherit;font-size:14px}
html.framed .eng-back{display:none}
html.framed .meuc-hub{padding-top:34px}
.calc-search{display:flex;align-items:center;gap:8px;margin:10px 12px 4px;background:var(--bg3);border:1px solid var(--border2);border-radius:9px;padding:7px 11px}
.calc-search svg{width:14px;height:14px;stroke:var(--text3);fill:none;stroke-width:2;flex:none}
.calc-search input{flex:1;min-width:0;border:none;background:transparent;outline:none;color:var(--text);font:inherit;font-size:12.5px}
.calc-noresults{margin:10px 16px;font-size:12px;color:var(--text3)}

/* when embedded in Charitools, hide the standalone hero so it reads as one page */
html.framed .eng-logo,html.framed .meuc-logo,html.framed .meuc-subtitle,html.framed .meuc-desc{display:none}
html.framed .meuc-hero{padding-top:8px}
html.framed .hub-search{margin-top:0}
html.framed .meuc-hub{padding-top:10px}

/* ── RTL (Hebrew/Arabic) ── */
html.meuc-rtl body{direction:rtl;text-align:right}
html.meuc-rtl .unit-picker,html.meuc-rtl input,html.meuc-rtl .num,html.meuc-rtl code{direction:ltr}
html.meuc-rtl .calc-grid,html.meuc-rtl .hub-grid{direction:rtl}