/* ════════════════════════════════════════════════════════════════════
   ENGINEERS VIEWS — site-wide design system
   Colours, fonts and radius come from components/theme.php (CSS variables).
   Do not hard-code colours here; use the variables so themes keep working.
   ════════════════════════════════════════════════════════════════════ */

*,*::before,*::after{box-sizing:border-box;}
/* solid fills that carry white text: vivid in light mode, deeper in dark mode for contrast */
:root{--fill:var(--grad-vivid);--fill-btn:var(--grad);}
html.dark{--fill:linear-gradient(120deg,var(--primary) 0%,color-mix(in srgb,var(--accent) 58%,#000) 55%,color-mix(in srgb,var(--accent-2) 70%,#000) 100%);--fill-btn:linear-gradient(135deg,var(--primary) 0%,color-mix(in srgb,var(--accent) 55%,#000) 100%);}
html{scroll-padding-top:96px;-webkit-text-size-adjust:100%;}
body{font-family:var(--font-body);font-size:1.05rem;line-height:1.75;color:var(--text);background-color:var(--bg);transition:background-color .3s,color .3s;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);color:var(--primary);}
::selection{background:rgba(var(--primary-rgb),.22);}
:focus-visible{outline:2.5px solid var(--primary-light);outline-offset:2px;border-radius:6px;}
.text-engineer-blue{color:var(--primary);}
.bg-engineer-light{background-color:var(--bg);}
.ev-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ─────────────────────────── HEADER ─────────────────────────── */
.site-header{position:fixed;top:14px;left:50%;transform:translateX(-50%);width:calc(100% - 32px);max-width:1200px;z-index:999;background:var(--nav-bg);-webkit-backdrop-filter:blur(18px) saturate(1.7);backdrop-filter:blur(18px) saturate(1.7);border-radius:18px;border:1px solid var(--nav-border);box-shadow:0 1px 0 rgba(255,255,255,.5) inset,0 10px 34px rgba(var(--primary-rgb),.10);transition:top .3s var(--ease),transform .35s var(--ease),box-shadow .3s,background .3s;}
html.dark .site-header{box-shadow:0 1px 0 rgba(255,255,255,.04) inset,0 12px 38px rgba(0,0,0,.45);}
.site-header.scrolled{top:8px;box-shadow:0 1px 0 rgba(255,255,255,.5) inset,0 16px 44px rgba(var(--primary-rgb),.16);}
html.dark .site-header.scrolled{box-shadow:0 16px 44px rgba(0,0,0,.55);}
.site-header::after{content:'';position:absolute;left:18px;right:18px;bottom:-1px;height:2px;border-radius:2px;background:var(--grad-vivid);opacity:0;transition:opacity .3s;}
.site-header.scrolled::after{opacity:.55;}
.site-header-inner{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:9px 12px 9px 14px;min-height:60px;}

.site-logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;font-family:var(--font-display);font-size:1.32rem;letter-spacing:-.01em;color:var(--text);line-height:1;}
.site-logo .ev-mark{width:36px;height:36px;border-radius:11px;background:var(--fill);display:grid;place-items:center;color:#fff;box-shadow:0 6px 16px rgba(var(--primary-rgb),.35),inset 0 1px 0 rgba(255,255,255,.35);transition:transform .35s var(--ease);flex-shrink:0;}
.site-logo:hover .ev-mark{transform:rotate(-8deg) scale(1.06);}
.site-logo .ev-word{color:var(--text);-webkit-text-fill-color:currentColor;}
.site-logo .ev-word span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;}

.nav-links{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;}
.nav-links a{position:relative;display:block;padding:7px 14px;border-radius:10px;font-size:.9rem;font-weight:600;color:var(--text-muted);text-decoration:none;letter-spacing:.005em;transition:color .2s,background .2s;}
.nav-links a:hover{color:var(--text);background:rgba(var(--primary-rgb),.08);}
.nav-links a[aria-current="page"]{color:var(--primary);background:rgba(var(--primary-rgb),.10);}
html.dark .nav-links a[aria-current="page"]{color:var(--primary-light);}
.nav-links a[aria-current="page"]::after{content:'';position:absolute;left:50%;bottom:2px;width:16px;height:3px;margin-left:-8px;border-radius:3px;background:var(--grad-vivid);}

.ev-hdr-actions{display:flex;align-items:center;gap:8px;}
.ev-search-btn{display:inline-flex;align-items:center;gap:9px;height:40px;padding:0 10px 0 13px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text-muted);font:500 .86rem var(--font-body);cursor:pointer;transition:border-color .2s,box-shadow .2s,color .2s;min-width:220px;}
.ev-search-btn:hover{border-color:var(--border-strong);color:var(--text);box-shadow:0 4px 14px rgba(var(--primary-rgb),.12);}
.ev-search-btn span{flex:1;text-align:left;}
.ev-search-btn kbd,.ev-kbd{font:600 .7rem var(--font-body);padding:2px 6px;border-radius:6px;border:1px solid var(--border);background:var(--surface-2);color:var(--text-muted);}
.dark-toggle,.ev-icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--border);background:var(--surface);cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-muted);flex-shrink:0;transition:border-color .2s,color .2s,transform .25s var(--ease),box-shadow .2s;}
.dark-toggle:hover,.ev-icon-btn:hover{border-color:var(--border-strong);color:var(--primary-light);box-shadow:0 4px 14px rgba(var(--primary-rgb),.14);}
.dark-toggle:hover svg{transform:rotate(18deg);}
.dark-toggle svg,.ev-icon-btn svg{width:18px;height:18px;transition:transform .3s var(--ease);}
.icon-moon{display:block;}.icon-sun{display:none;}
html.dark .icon-moon{display:none;}html.dark .icon-sun{display:block;}
.ev-mobile-only{display:none !important;}

/* legacy elements kept in the DOM for compatibility */
.menu-btn{display:none !important;}
.mobile-menu{display:none !important;}
.mobile-nav-strip{display:none !important;}

/* mobile menu panel */
.ev-mnav{display:none;padding:4px 12px 14px;border-top:1px solid var(--border);}
.ev-mnav.open{display:block;animation:evDrop .28s var(--ease);}
.ev-mnav a.ev-mlink{display:flex;align-items:center;gap:12px;padding:11px 10px;border-radius:12px;color:var(--text);font-weight:600;font-size:.97rem;text-decoration:none;}
.ev-mnav a.ev-mlink svg{color:var(--primary-light);}
.ev-mnav a.ev-mlink:hover,.ev-mnav a.ev-mlink[aria-current="page"]{background:rgba(var(--primary-rgb),.09);color:var(--primary);}
.ev-mnav-sub{margin:10px 4px 4px;font-size:.7rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--text-muted);}
.ev-mnav-pop{display:flex;flex-wrap:wrap;gap:7px;padding:4px;}
.ev-mnav-pop a{font-size:.8rem;font-weight:600;padding:6px 11px;border-radius:999px;background:var(--surface-2);color:var(--text);text-decoration:none;border:1px solid var(--border);}
@keyframes evDrop{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* reading progress */
.ev-progress{position:absolute;left:14px;right:14px;bottom:0;height:2px;border-radius:2px;overflow:hidden;pointer-events:none;opacity:0;transition:opacity .3s;}
.ev-progress.on{opacity:1;}
.ev-progress i{display:block;height:100%;width:100%;background:var(--grad-vivid);transform-origin:0 50%;transform:scaleX(0);}

@media (max-width:980px){.ev-search-btn{min-width:0;}.ev-search-btn span,.ev-search-btn kbd{display:none;}.ev-search-btn{width:40px;padding:0;justify-content:center;}}
@media (max-width:768px){
  .nav-links{display:none;}
  .ev-mobile-only{display:flex !important;}
  .site-header{top:8px;width:calc(100% - 16px);border-radius:16px;}
  .site-header.scrolled{top:6px;}
  .site-header.ev-hide{transform:translate(-50%,-130%);}
  .site-header-inner{padding:7px 8px 7px 10px;min-height:54px;}
  .site-logo{font-size:1.18rem;gap:8px;}
  .site-logo .ev-mark{width:32px;height:32px;border-radius:10px;}
  .dark-toggle,.ev-icon-btn,.ev-search-btn{width:38px;height:38px;}
}

/* ─────────────────────────── SEARCH ─────────────────────────── */
.ev-search{position:fixed;inset:0;z-index:2000;display:none;align-items:flex-start;justify-content:center;padding:9vh 14px 14px;background:rgba(5,10,25,.45);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);}
.ev-search.open{display:flex;animation:evFade .18s ease;}
@keyframes evFade{from{opacity:0}to{opacity:1}}
.ev-search-box{width:100%;max-width:640px;background:var(--surface);border:1px solid var(--border-strong);border-radius:18px;box-shadow:0 30px 80px rgba(0,0,0,.35);overflow:hidden;display:flex;flex-direction:column;max-height:78vh;animation:evPop .22s var(--ease);}
@keyframes evPop{from{transform:translateY(10px) scale(.98);opacity:0}to{transform:none;opacity:1}}
.ev-search-in{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--border);color:var(--text-muted);}
.ev-search-in input{flex:1;border:0;outline:0;background:transparent;font:500 1.06rem var(--font-body);color:var(--text);min-width:0;}
.ev-search-in input::placeholder{color:var(--text-muted);}
.ev-search-res{overflow-y:auto;padding:8px;}
.ev-search-grp{font-size:.68rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--text-muted);padding:10px 10px 6px;}
.ev-sr-item{display:flex;align-items:center;gap:12px;padding:10px;border-radius:12px;text-decoration:none;color:var(--text);}
.ev-sr-item .ic{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex-shrink:0;color:var(--c,var(--primary));background:color-mix(in srgb,var(--c,var(--primary)) 14%,transparent);}
.ev-sr-item .tx{min-width:0;flex:1;}
.ev-sr-item .t{display:block;font-weight:600;font-size:.94rem;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.ev-sr-item .d{display:block;font-size:.8rem;color:var(--text-muted);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.ev-sr-item .k{font-size:.66rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:2px 7px;border-radius:6px;background:var(--surface-2);color:var(--text-muted);flex-shrink:0;}
.ev-sr-item mark{background:rgba(var(--accent-rgb),.22);color:inherit;border-radius:3px;padding:0 1px;}
.ev-sr-item.sel,.ev-sr-item:hover{background:rgba(var(--primary-rgb),.09);}
.ev-search-empty{padding:28px 16px;text-align:center;color:var(--text-muted);font-size:.92rem;}
.ev-search-foot{display:flex;gap:14px;align-items:center;justify-content:flex-end;padding:9px 14px;border-top:1px solid var(--border);font-size:.74rem;color:var(--text-muted);background:var(--surface-2);}
@media (max-width:600px){.ev-search{padding:8px;}.ev-search-box{max-height:88vh;}.ev-search-foot{display:none;}}

/* ─────────────────────────── BUTTONS & LEGACY COMPONENTS ─────────────────────────── */
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:12px;background:var(--primary);background-image:var(--fill-btn);color:#fff !important;font-weight:700;font-size:.92rem;text-decoration:none;border:0;cursor:pointer;letter-spacing:.01em;box-shadow:0 6px 18px rgba(var(--primary-rgb),.28),inset 0 1px 0 rgba(255,255,255,.22);transition:transform .2s var(--ease),box-shadow .2s,filter .2s;}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(var(--primary-rgb),.36),inset 0 1px 0 rgba(255,255,255,.22);filter:saturate(1.15) brightness(1.04);}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 22px;border-radius:12px;background:var(--surface);color:var(--primary);font-weight:700;font-size:.92rem;text-decoration:none;border:1.5px solid var(--border-strong);transition:transform .2s var(--ease),border-color .2s,background .2s,box-shadow .2s;}
html.dark .btn-outline{color:var(--primary-light);}
.btn-outline:hover{transform:translateY(-2px);border-color:var(--primary-light);background:rgba(var(--primary-rgb),.06);box-shadow:0 6px 18px rgba(var(--primary-rgb),.12);}
.btn-full{width:100%;justify-content:center;}
.btn-white{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:12px;background:#fff;color:#0b1324;font-weight:700;font-size:.93rem;text-decoration:none;box-shadow:0 6px 22px rgba(0,0,0,.18);transition:transform .2s var(--ease),box-shadow .2s;position:relative;}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(0,0,0,.24);}

.ev-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--card-shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;display:flex;flex-direction:column;overflow:hidden;position:relative;}
.ev-card:hover{transform:translateY(-4px);box-shadow:var(--card-shadow-hover);border-color:var(--border-strong);}
.ev-card-body{padding:24px 24px 14px;flex:1;}
.ev-card-footer{padding:0 24px 24px;}
.ev-card h4{font-family:var(--font-display);font-size:1.22rem;color:var(--primary);margin-bottom:10px;line-height:1.35;}
.ev-card p{color:var(--text-muted);font-size:.95rem;line-height:1.65;}
.ev-badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px;background:rgba(var(--primary-rgb),.10);color:var(--primary-light);border:1px solid rgba(var(--primary-rgb),.18);}

.pagination-wrap{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:44px;flex-wrap:wrap;}
.pagination-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 18px;border-radius:10px;background:var(--primary);background-image:var(--fill-btn);color:#fff;font-weight:600;font-size:.88rem;text-decoration:none;transition:transform .15s;}
.pagination-btn:hover{transform:translateY(-1px);}
.pagination-btn.disabled{background:var(--surface-2);background-image:none;color:var(--text-muted);pointer-events:none;}
.pagination-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:9px;font-weight:600;font-size:.88rem;text-decoration:none;color:var(--text-muted);background:var(--surface-2);transition:background .2s,color .2s;}
.pagination-num:hover,.pagination-num.active{background:var(--primary);color:#fff;}

.section-label{display:inline-block;font-size:.76rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase;color:var(--accent);margin-bottom:12px;}
html.dark .section-label{color:var(--accent);}
.section-title{font-family:var(--font-display);color:var(--primary);font-size:clamp(1.8rem,3.4vw,2.5rem);line-height:1.18;margin-bottom:14px;letter-spacing:-.005em;}
html.dark .section-title{color:var(--text);}

.prose p,.prose ul,.prose ol,.prose li{font-size:1.05rem;line-height:1.8;color:var(--text);}
.prose img{max-width:100%;height:auto;display:block;margin:0 auto;}

.mjx-container{overflow:visible !important;max-width:100% !important;}
.mjx-block{display:block !important;overflow:visible !important;max-width:100% !important;}
mjx-container{overflow:visible !important;}
mjx-container > svg{overflow:visible !important;}

html.dark ::-webkit-scrollbar{width:9px;height:9px;}
html.dark ::-webkit-scrollbar-track{background:var(--bg);}
html.dark ::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:6px;border:2px solid var(--bg);}

@keyframes fade-in-up{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@keyframes fade-in-down{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}
.animate-fade-in-up{animation:fade-in-up .7s ease-out forwards;opacity:0;}
.animate-fade-in-down{animation:fade-in-down .7s ease-out forwards;}
.delay-1{animation-delay:.15s}.delay-2{animation-delay:.3s}.delay-3{animation-delay:.45s}

.ad-slot{min-height:0;overflow:hidden;margin:0 0 24px;}
.ad-slot ins{min-height:0 !important;}

/* ─────────────────────────── PAGE + SIDEBAR LAYOUT ─────────────────────────── */
.page-with-sidebar{max-width:1200px;margin:0 auto;padding:48px 24px;display:flex;gap:30px;align-items:flex-start;}
.page-main-content{flex:1;min-width:0;}
.sidebar-wrap{width:276px;flex-shrink:0;display:flex;flex-direction:column;gap:12px;position:sticky;top:90px;max-height:calc(100vh - 106px);overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border) transparent;padding:2px 4px 2px 2px;}
.sidebar-wrap::-webkit-scrollbar{width:4px;}
.sidebar-wrap::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}
.sidebar-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:14px;box-shadow:0 1px 2px rgba(15,23,42,.03);transition:border-color .2s;}
.sidebar-card:hover{border-color:var(--border-strong);}
.sbc-title{display:flex;align-items:center;gap:7px;font-size:.7rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--text);margin-bottom:10px;padding-bottom:9px;border-bottom:1px solid var(--border);}
.sbc-title svg{color:var(--primary-light);}
.sbc-title .sbc-pct{margin-left:auto;font-size:.68rem;letter-spacing:.02em;color:var(--text-muted);font-weight:700;}
.sb-progress{height:3px;border-radius:3px;background:var(--surface-2);margin:-4px 0 10px;overflow:hidden;}
.sb-progress i{display:block;height:100%;width:0;background:var(--grad-vivid);transition:width .15s linear;}
.sb-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px;counter-reset:sb;}
.sb-list li a{display:flex;align-items:flex-start;gap:9px;padding:6px 6px;border-radius:9px;font-size:.82rem;color:var(--text-muted);text-decoration:none;line-height:1.42;transition:background .15s,color .15s;}
.sb-list li a:hover{background:rgba(var(--primary-rgb),.07);color:var(--text);}
.sb-num{counter-increment:sb;flex-shrink:0;width:20px;height:20px;border-radius:6px;display:grid;place-items:center;font-size:.68rem;font-weight:800;color:var(--primary-light);background:rgba(var(--primary-rgb),.10);margin-top:1px;}
.sb-num::before{content:counter(sb);}
.sb-ic{flex-shrink:0;width:22px;height:22px;border-radius:7px;display:grid;place-items:center;color:var(--c,var(--accent));background:color-mix(in srgb,var(--c,var(--accent)) 14%,transparent);margin-top:0;}
.sb-dot{width:6px;height:6px;border-radius:50%;background:var(--primary);flex-shrink:0;margin-top:6px;}
.sb-more{display:inline-flex;align-items:center;gap:5px;margin-top:8px;font-size:.76rem;font-weight:700;color:var(--primary);text-decoration:none;}
html.dark .sb-more{color:var(--primary-light);}
.sb-more:hover{gap:8px;}
.toc-links{display:flex;flex-direction:column;gap:1px;position:relative;}
.toc-link{display:block;padding:5px 9px;border-radius:7px;font-size:.81rem;line-height:1.4;color:var(--text-muted);text-decoration:none;border-left:2px solid var(--border);transition:color .2s,border-color .2s,background .2s;}
.toc-link:hover{color:var(--text);background:rgba(var(--primary-rgb),.05);}
.toc-link.active{color:var(--primary);border-left-color:var(--primary-light);background:rgba(var(--primary-rgb),.08);font-weight:600;}
html.dark .toc-link.active{color:var(--primary-light);}
.sb-cta-primary{position:relative;overflow:hidden;background:var(--fill);border:0;text-align:left;color:#fff;padding:16px;}
.sb-cta-primary::after{content:'';position:absolute;width:140px;height:140px;right:-50px;top:-50px;border-radius:50%;background:rgba(255,255,255,.14);}
.sb-cta-primary h4{font-family:var(--font-display);color:#fff;font-size:1.02rem;margin:0 0 4px;position:relative;}
.sb-cta-primary p{color:rgba(255,255,255,.88);font-size:.8rem;margin:0 0 12px;line-height:1.45;position:relative;}
.sb-cta-primary a{position:relative;display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border-radius:9px;background:#fff;color:#0b1324;font-weight:700;font-size:.78rem;text-decoration:none;}
.sb-cta-secondary{background:var(--surface-2);text-align:left;}
.sb-cta-secondary h4{font-family:var(--font-display);color:var(--primary);font-size:.98rem;margin:0 0 4px;}
html.dark .sb-cta-secondary h4{color:var(--text);}
.sb-cta-secondary p{color:var(--text-muted);font-size:.8rem;margin:0 0 10px;line-height:1.45;}
.sb-emoji{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;margin-bottom:8px;position:relative;}
.sb-cta-primary .sb-emoji{background:rgba(255,255,255,.18);color:#fff;}
.sb-cta-secondary .sb-emoji{background:rgba(var(--primary-rgb),.12);color:var(--primary-light);}
@media(max-width:1024px){
  .page-with-sidebar{flex-direction:column;padding:24px 16px;}
  .page-main-content{order:1;width:100%;}
  .sidebar-wrap{order:2;width:100%;position:static;max-height:none;overflow-y:visible;display:grid;grid-template-columns:repeat(2,1fr);gap:12px;padding:0;}
  .sidebar-toc{grid-column:1/-1;}
}
@media(max-width:500px){.sidebar-wrap{grid-template-columns:1fr;}}

/* ─────────────────────────── SHARED HUB COMPONENTS (home / blog / tools) ─────────────────────────── */
.ev-shell{max-width:1200px;margin:0 auto;padding:0 24px;}
@media(max-width:600px){.ev-shell{padding:0 16px;}}
.ev-sec{padding:72px 0;}
.ev-sec.alt{background:var(--surface-2);background-image:linear-gradient(180deg,rgba(var(--primary-rgb),.03),transparent 40%);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.ev-sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:30px;}
.ev-sec-head.center{flex-direction:column;align-items:center;text-align:center;}
.ev-sec-head p{color:var(--text-muted);max-width:560px;margin:0;font-size:.98rem;line-height:1.65;}
.ev-sec-head .section-label{display:inline-block;margin:0 0 10px;}
.ev-sec-head .section-title{margin:0 0 10px;}
.ev-link{display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:.9rem;color:var(--primary);text-decoration:none;white-space:nowrap;transition:gap .2s;}
html.dark .ev-link{color:var(--primary-light);}
.ev-link:hover{gap:10px;}

.ev-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:5px 12px 5px 6px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-size:.8rem;font-weight:600;color:var(--text-muted);box-shadow:0 2px 10px rgba(var(--primary-rgb),.07);}
.ev-eyebrow b{display:inline-flex;align-items:center;padding:2px 9px;border-radius:999px;background:var(--fill);color:#fff;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;}
.ev-grad-text{background:var(--grad-vivid);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;}

.ev-hero{position:relative;overflow:hidden;isolation:isolate;}
.ev-hero::before{content:'';position:absolute;inset:0;z-index:-2;background:
  radial-gradient(60% 70% at 85% 10%,rgba(var(--accent-rgb),.16) 0%,transparent 60%),
  radial-gradient(55% 60% at 10% 20%,rgba(var(--primary-rgb),.16) 0%,transparent 60%),
  radial-gradient(50% 55% at 60% 100%,rgba(var(--accent-2-rgb),.12) 0%,transparent 60%);}
.ev-hero::after{content:'';position:absolute;inset:0;z-index:-1;background-image:linear-gradient(to right,rgba(var(--primary-rgb),.07) 1px,transparent 1px),linear-gradient(to bottom,rgba(var(--primary-rgb),.07) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(ellipse 75% 70% at 50% 35%,#000 30%,transparent 80%);mask-image:radial-gradient(ellipse 75% 70% at 50% 35%,#000 30%,transparent 80%);}
.ev-crumbs{display:flex;align-items:center;gap:7px;font-size:.84rem;color:var(--text-muted);margin-bottom:16px;}
.ev-crumbs a{color:var(--text-muted);text-decoration:none;}
.ev-crumbs a:hover{color:var(--primary);}
.ev-h1{font-family:var(--font-display);color:var(--text);font-size:clamp(2.2rem,4.6vw,3.6rem);line-height:1.08;letter-spacing:-.015em;margin:16px 0 18px;font-weight:400;}
.ev-lead{color:var(--text-muted);font-size:1.1rem;line-height:1.7;max-width:600px;margin:0;}
.ev-pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px;}
.ev-pill{display:inline-flex;align-items:center;gap:7px;padding:6px 13px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-size:.8rem;font-weight:600;color:var(--text);}
.ev-pill svg{color:var(--accent);}
.ev-pill b{font-weight:800;color:var(--primary);}
html.dark .ev-pill b{color:var(--primary-light);}

/* search field used in hero and hub toolbars */
.ev-field{display:flex;align-items:center;gap:10px;height:52px;padding:0 8px 0 16px;border-radius:14px;background:var(--surface);border:1.5px solid var(--border);box-shadow:0 8px 28px rgba(var(--primary-rgb),.08);color:var(--text-muted);transition:border-color .2s,box-shadow .2s;}
.ev-field:focus-within{border-color:var(--primary-light);box-shadow:0 0 0 4px rgba(var(--primary-rgb),.12),0 8px 28px rgba(var(--primary-rgb),.10);}
.ev-field input{flex:1;min-width:0;height:100%;border:0;outline:0;background:transparent;font:500 1rem var(--font-body);color:var(--text);}
.ev-field input::placeholder{color:var(--text-muted);opacity:.85;}
.ev-field .ev-kbd{margin-right:6px;}
button.ev-field{width:100%;cursor:text;text-align:left;font:500 1rem var(--font-body);}

/* tile grid */
.ev-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
@media(max-width:960px){.ev-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:600px){.ev-grid{grid-template-columns:1fr;gap:14px;}}
.ev-tile{position:relative;display:flex;flex-direction:column;gap:10px;padding:20px 20px 18px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);box-shadow:var(--card-shadow);transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s;overflow:hidden;}
.ev-tile::before{content:'';position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,var(--c),color-mix(in srgb,var(--c) 30%,var(--accent)));opacity:0;transition:opacity .3s;}
.ev-tile:hover{transform:translateY(-4px);box-shadow:var(--card-shadow-hover);border-color:color-mix(in srgb,var(--c) 40%,var(--border));}
.ev-tile:hover::before{opacity:1;}
.ev-tile[hidden]{display:none;}
.ev-tile-top{display:flex;align-items:center;gap:9px;flex-wrap:wrap;}
.ev-tile-ico{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:var(--c);background:color-mix(in srgb,var(--c) 13%,transparent);flex-shrink:0;}
html.dark .ev-tile-ico{color:color-mix(in srgb,var(--c) 55%,#fff);background:color-mix(in srgb,var(--c) 22%,transparent);}
.ev-tile-cat{font-size:.74rem;font-weight:700;letter-spacing:.02em;color:var(--c);flex:1;min-width:0;}
html.dark .ev-tile-cat{color:color-mix(in srgb,var(--c) 55%,#fff);}
.ev-tile-kind{font-size:.66rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:3px 8px;border-radius:6px;background:var(--surface-2);color:var(--text-muted);}
.ev-tile-new{font-size:.66rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:3px 8px;border-radius:6px;background:var(--fill);color:#fff;}
.ev-tile-title{font-family:var(--font-display);font-weight:400;font-size:1.18rem;line-height:1.3;color:var(--text);margin:2px 0 0;}
.ev-tile-title a{color:inherit;text-decoration:none;}
.ev-tile-title a::after{content:'';position:absolute;inset:0;z-index:1;border-radius:inherit;}
.ev-tile-title a:focus-visible{outline:none;}
.ev-tile:focus-within{outline:2.5px solid var(--primary-light);outline-offset:2px;}
.ev-tile-text{color:var(--text-muted);font-size:.9rem;line-height:1.6;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.ev-tile-foot{margin-top:auto;padding-top:6px;display:flex;align-items:center;gap:6px;font-size:.84rem;font-weight:700;color:var(--primary);}
html.dark .ev-tile-foot{color:var(--primary-light);}
.ev-tile-foot svg{transition:transform .25s var(--ease);}
.ev-tile:hover .ev-tile-foot svg{transform:translateX(4px);}

/* hub toolbar + chips */
.ev-toolbar{position:sticky;top:84px;z-index:20;margin:-34px 0 26px;padding:12px;border-radius:18px;background:var(--nav-bg);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border);box-shadow:0 10px 30px rgba(var(--primary-rgb),.10);}
.ev-toolbar-row{display:flex;gap:10px;align-items:center;}
.ev-toolbar .ev-field{flex:1;height:46px;box-shadow:none;}
.ev-select{height:46px;border-radius:12px;border:1.5px solid var(--border);background:var(--surface);color:var(--text);font:600 .88rem var(--font-body);padding:0 12px;cursor:pointer;}
.ev-chips{display:flex;gap:7px;overflow-x:auto;scrollbar-width:none;padding:10px 2px 2px;-webkit-mask-image:linear-gradient(90deg,#000 92%,transparent);mask-image:linear-gradient(90deg,#000 92%,transparent);}
.ev-chips::-webkit-scrollbar{display:none;}
.ev-chip{--c:var(--primary-light);display:inline-flex;align-items:center;gap:6px;flex-shrink:0;padding:6px 12px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:600 .8rem var(--font-body);cursor:pointer;white-space:nowrap;transition:background .2s,border-color .2s,color .2s;}
.ev-chip i{font-style:normal;font-size:.7rem;font-weight:800;color:var(--text-muted);}
.ev-chip svg{color:var(--c);}
.ev-chip:hover{border-color:color-mix(in srgb,var(--c) 50%,var(--border));}
.ev-chip[aria-pressed="true"]{background:var(--c);border-color:var(--c);color:#fff;}
.ev-chip[aria-pressed="true"] svg,.ev-chip[aria-pressed="true"] i{color:#fff;}
.ev-chip.all[aria-pressed="true"]{background:var(--primary);background-image:var(--fill-btn);border-color:transparent;}
.ev-count{font-size:.86rem;color:var(--text-muted);margin:0 0 14px;}
.ev-count b{color:var(--text);}
.ev-empty{display:none;text-align:center;padding:44px 20px;border:1.5px dashed var(--border-strong);border-radius:var(--radius);color:var(--text-muted);}
.ev-empty.on{display:block;}
@media(max-width:600px){.ev-toolbar{top:70px;padding:10px;margin-top:-28px;}.ev-select{display:none;}}

/* topic tiles */
.ev-topics{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;}
@media(max-width:1060px){.ev-topics{grid-template-columns:repeat(3,minmax(0,1fr));}}
@media(max-width:640px){.ev-topics{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;}}
.ev-topic{position:relative;display:flex;flex-direction:column;gap:8px;padding:16px;border-radius:14px;background:var(--surface);border:1px solid var(--border);transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;}
.ev-topic:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--c) 45%,var(--border));box-shadow:0 12px 30px color-mix(in srgb,var(--c) 18%,transparent);}
.ev-topic .ic{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--c),color-mix(in srgb,var(--c) 55%,#000));box-shadow:0 6px 14px color-mix(in srgb,var(--c) 35%,transparent);}
.ev-topic .nm{font-weight:700;font-size:.92rem;line-height:1.3;color:var(--text);}
.ev-topic .ln{display:flex;gap:10px;flex-wrap:wrap;font-size:.78rem;}
.ev-topic .ln a{color:var(--text-muted);text-decoration:none;font-weight:600;}
.ev-topic .ln a:hover{color:var(--c);}
.ev-topic .ln a b{color:var(--text);}

/* CTA band */
.ev-cta{position:relative;overflow:hidden;border-radius:24px;padding:56px 40px;background:var(--fill);color:#fff;text-align:center;isolation:isolate;}
.ev-cta::before{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(circle at 15% 20%,rgba(255,255,255,.22),transparent 40%),radial-gradient(circle at 85% 90%,rgba(0,0,0,.18),transparent 45%);}
.ev-cta::after{content:'';position:absolute;inset:0;z-index:-1;background-image:radial-gradient(rgba(255,255,255,.18) 1px,transparent 1px);background-size:22px 22px;-webkit-mask-image:linear-gradient(180deg,#000,transparent);mask-image:linear-gradient(180deg,#000,transparent);}
.ev-cta h2,.ev-cta h3{font-family:var(--font-display);color:#fff;font-size:clamp(1.7rem,3vw,2.5rem);margin:0 0 12px;font-weight:400;}
.ev-cta p{color:rgba(255,255,255,.9);max-width:520px;margin:0 auto 26px;font-size:1.02rem;}
.ev-cta .row{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;}
.ev-cta .ghost{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:12px;border:1.5px solid rgba(255,255,255,.55);color:#fff;font-weight:700;font-size:.93rem;text-decoration:none;transition:background .2s;}
.ev-cta .ghost:hover{background:rgba(255,255,255,.12);}
@media(max-width:600px){.ev-cta{padding:40px 22px;border-radius:20px;}}

/* FAQ */
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:10px;overflow:hidden;transition:border-color .2s,box-shadow .2s;}
.faq-item:hover{border-color:var(--border-strong);}
.faq-item details[open]{box-shadow:inset 3px 0 0 var(--primary-light);}
.faq-item details summary{padding:17px 20px;font-weight:700;font-size:1rem;color:var(--text);cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.faq-item details summary::-webkit-details-marker{display:none;}
.faq-item details summary::after{content:'+';width:24px;height:24px;flex-shrink:0;border-radius:8px;background:rgba(var(--primary-rgb),.10);color:var(--primary-light);display:grid;place-items:center;font:600 1.15rem/1 var(--font-body);transition:transform .3s var(--ease);}
.faq-item details[open] summary::after{transform:rotate(45deg);}
.faq-item details p{padding:0 20px 18px;color:var(--text-muted);font-size:.95rem;line-height:1.7;margin:0;}

/* scroll reveal (progressive: content is visible without JS) */
.js-reveal .ev-rv{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease);}
.js-reveal .ev-rv.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto !important;}.js-reveal .ev-rv{opacity:1;transform:none;transition:none;}.ev-tile,.ev-topic,.btn-primary,.btn-outline{transition:none;}}

/* ─────────────────────────── FOOTER ─────────────────────────── */
.ev-footer{position:relative;margin-top:72px;background:var(--surface);border-top:1px solid var(--border);}
.ev-footer::before{content:'';position:absolute;left:0;right:0;top:-1px;height:3px;background:var(--grad-vivid);}
.ev-footer-in{max-width:1200px;margin:0 auto;padding:56px 24px 26px;}
.ev-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.15fr;gap:34px;margin-bottom:40px;}
.ev-footer h4{font-family:var(--font-body);font-size:.74rem;font-weight:800;letter-spacing:.13em;text-transform:uppercase;color:var(--text);margin:0 0 14px;}
.ev-footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px;}
.ev-footer ul a,.ev-footer-bottom a{color:var(--text-muted);text-decoration:none;font-size:.9rem;transition:color .2s;}
.ev-footer ul a:hover,.ev-footer-bottom a:hover{color:var(--primary);}
html.dark .ev-footer ul a:hover{color:var(--primary-light);}
.ev-footer-about{color:var(--text-muted);font-size:.92rem;line-height:1.7;max-width:300px;margin:14px 0 18px;}
.ev-social{display:flex;gap:9px;}
.ev-social a{width:38px;height:38px;border-radius:11px;border:1px solid var(--border);background:var(--surface-2);display:grid;place-items:center;color:var(--text-muted);transition:color .2s,border-color .2s,transform .2s var(--ease),background .2s;}
.ev-social a:hover{color:#fff;background:var(--primary);background-image:var(--fill-btn);border-color:transparent;transform:translateY(-2px);}
.ev-footer-mail{display:inline-flex;align-items:center;gap:7px;color:var(--text);font-weight:600;font-size:.9rem;text-decoration:none;word-break:break-all;}
.ev-footer-mail:hover{color:var(--primary);}
.ev-footer-note{color:var(--text-muted);font-size:.84rem;margin:8px 0 14px;}
.ev-footer-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.85rem;color:var(--text-muted);}
.ev-footer-bottom nav{display:flex;gap:18px;flex-wrap:wrap;}
.ev-totop{position:fixed;right:18px;bottom:18px;z-index:900;width:44px;height:44px;border-radius:14px;border:1px solid var(--border);background:var(--surface);color:var(--primary-light);display:grid;place-items:center;cursor:pointer;box-shadow:0 10px 26px rgba(var(--primary-rgb),.20);opacity:0;transform:translateY(12px);pointer-events:none;transition:opacity .3s,transform .3s var(--ease);}
.ev-totop.on{opacity:1;transform:none;pointer-events:auto;}
.ev-totop:hover{background:var(--primary);background-image:var(--fill-btn);color:#fff;border-color:transparent;}
@media(max-width:980px){.ev-footer-grid{grid-template-columns:1fr 1fr 1fr;}.ev-footer-brand{grid-column:1/-1;}}
@media(max-width:560px){.ev-footer-grid{grid-template-columns:1fr 1fr;gap:26px;}.ev-footer-contact{grid-column:1/-1;}.ev-totop{right:12px;bottom:84px;}}

/* Tailwind's preflight (loaded after this file) resets [type=button] backgrounds;
   these element-qualified selectors keep our buttons styled. */
button.ev-search-btn,button.dark-toggle,button.ev-icon-btn,button.ev-chip,button.ev-totop,button.btn-outline{background-color:var(--surface);}
button.ev-field{background-color:var(--surface);}
.ev-sec-head h2,.ev-cta h2,.why h3,.ev-tile-title{margin-top:0;}
.ev-footer p{margin:0;}