*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#0d9488;--primary-dim:#065f46;--bg:#050a09;--bg2:#0a1512;--card:#0c1f1b;--card2:#0f2a25;--border:#115e59;--text:#ccfbf1;--muted:#5eead4;--muted2:#134e4a;--input:#071412;--glow:rgba(13,148,136,0.15);
--brandA:#a855f7;--brandB:#ec4899;--brandC:#38bdf8;--ink:#050308;--panel:rgba(255,255,255,.03);--panel-border:rgba(255,255,255,.08)}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:'Space Grotesk',sans-serif;background:var(--ink);color:var(--text);min-height:100vh;overflow-x:hidden}
#app{min-height:100vh}
a{color:inherit}

/* ===== Ambient background orbs (site-wide brand chrome) ===== */
.bg-orbs{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.orb{position:absolute;border-radius:50%;filter:blur(110px);opacity:.35}
.orb-1{width:560px;height:560px;top:-180px;right:-120px;background:var(--brandA)}
.orb-2{width:480px;height:480px;bottom:-220px;left:-140px;background:var(--brandB);opacity:.28}
.orb-3{width:420px;height:420px;top:35%;left:45%;background:var(--brandC);opacity:.16}

/* ===== Top navigation ===== */
.site-nav{position:sticky;top:0;left:0;right:0;z-index:100;background:rgba(5,3,8,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--panel-border)}
.site-nav-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;gap:24px;padding:16px 32px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brandA),var(--brandB));display:flex;align-items:center;justify-content:center;color:#fff;font-size:.95rem;flex-shrink:0}
.brand-mark svg,.brand-mark i{width:18px;height:18px}
.brand-text{font-size:1.15rem;font-weight:700;letter-spacing:-.02em;color:#fff}
.brand-accent{background:linear-gradient(90deg,var(--brandA),var(--brandB));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:8px}
.nav-links a{padding:8px 14px;border-radius:8px;font-size:.86rem;font-weight:500;color:#a3a3b8;text-decoration:none;transition:all .15s}
.nav-links a:hover{color:#fff;background:var(--panel)}
.nav-links a.active{color:#fff;background:var(--panel)}
.site-nav-inner #menu-toggle{display:none;margin-left:auto;width:38px;height:38px;border-radius:9px;background:var(--panel);border:1px solid var(--panel-border);color:#fff;font-size:1rem;cursor:pointer;align-items:center;justify-content:center}
.mobile-menu{display:none;flex-direction:column;padding:8px 20px 16px;border-top:1px solid var(--panel-border)}
.mobile-menu a{padding:11px 4px;font-size:.92rem;color:#c9c9db;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.05)}
.mobile-menu.open{display:flex}

/* ===== Main / content ===== */
#main{position:relative;min-height:100vh;z-index:1}
#content{position:relative;z-index:1;max-width:860px;margin:0 auto;padding:48px 32px 60px}
#content.wide{max-width:1200px}
#categories,#tools{scroll-margin-top:84px}
#tool-info{position:relative;z-index:1;max-width:760px;margin:0 auto;padding:0 32px 60px}
#tool-info h2{font-size:1.4rem;margin:32px 0 10px;color:#fff}
#tool-info h3{font-size:1.05rem;margin:22px 0 8px;color:#fff}
#tool-info p{font-size:.9rem;line-height:1.7;color:#a3a3b8}
#tool-info a{color:var(--brandC)}
#site-footer{position:relative;z-index:1;display:flex;gap:24px;justify-content:center;flex-wrap:wrap;padding:28px 32px 40px;border-top:1px solid var(--panel-border);margin-top:40px;font-size:.82rem}
#site-footer a{color:#8a8aa0;text-decoration:none}
#site-footer a:hover{color:#fff}

/* ===== Home hero ===== */
.hero{max-width:820px;margin:40px auto 0;text-align:center;padding:0 16px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;background:var(--panel);border:1px solid var(--panel-border);font-size:.78rem;color:#c9c9db;margin-bottom:28px}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 8px #22c55e}
.hero h1{font-size:3.4rem;font-weight:700;letter-spacing:-.03em;line-height:1.08;color:#fff;margin-bottom:20px}
.hero h1 .grad{background:linear-gradient(90deg,var(--brandA),var(--brandB) 55%,var(--brandC));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:1.02rem;color:#9d9db2;max-width:560px;margin:0 auto 36px;line-height:1.6}
.hero-search{position:relative;max-width:600px;margin:0 auto}
.hero-search i.fa-search{position:absolute;left:20px;top:50%;transform:translateY(-50%);color:#77778e;font-size:.95rem}
.hero-search input{width:100%;padding:16px 60px 16px 48px;background:var(--panel);border:1px solid var(--panel-border);border-radius:14px;color:#fff;font-family:inherit;font-size:.95rem;outline:none;transition:border-color .2s}
.hero-search input:focus{border-color:var(--brandA)}
.hero-search .kbd{position:absolute;right:14px;top:50%;transform:translateY(-50%);font-size:.68rem;color:#77778e;background:rgba(255,255,255,.06);border:1px solid var(--panel-border);border-radius:6px;padding:3px 7px;display:flex;gap:2px}
.hero-results{position:absolute;left:0;right:0;top:calc(100% + 8px);background:#0b0812;border:1px solid var(--panel-border);border-radius:12px;overflow:hidden;text-align:left;z-index:50;box-shadow:0 20px 50px rgba(0,0,0,.5);display:none;max-height:360px;overflow-y:auto}
.hero-results.show{display:block}
.hero-results a{display:flex;align-items:center;gap:10px;padding:11px 16px;font-size:.85rem;color:#d4d4e0;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.04)}
.hero-results a:last-child{border-bottom:none}
.hero-results a:hover{background:rgba(255,255,255,.04)}
.hero-results .r-cat{margin-left:auto;font-size:.7rem;color:#77778e}
.hero-checks{display:flex;gap:28px;justify-content:center;flex-wrap:wrap;margin-top:36px;font-size:.82rem;color:#8a8aa0}
.hero-checks span{display:flex;align-items:center;gap:7px}
.hero-checks i{color:#22c55e;font-size:.78rem}

/* ===== Breadcrumb (kept) ===== */
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:.78rem;color:#8a8aa0;margin-bottom:24px}
.breadcrumb a{color:var(--brandC);cursor:pointer;text-decoration:none;transition:color .15s}
.breadcrumb a:hover{color:#fff}

/* ===== Section headers (categories / all-tools pages) ===== */
.page-head{margin-bottom:32px}
.page-head h1{font-size:2.2rem;font-weight:700;letter-spacing:-.02em;color:#fff;margin-bottom:8px}
.page-head p{font-size:.92rem;color:#9d9db2}
.page-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}
.page-head-count{font-size:.82rem;color:#77778e;white-space:nowrap}

/* Category overview cards */
.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:20px}
.category-card{background:var(--panel);border:1px solid var(--panel-border);border-radius:16px;padding:26px;transition:all .2s}
.category-card:hover{border-color:var(--cat-color,var(--brandA));transform:translateY(-2px)}
.category-card-icon{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.15rem;margin-bottom:16px;background:var(--cat-glow);color:var(--cat-color)}
.category-card h3{font-size:1.15rem;font-weight:600;color:#fff;margin-bottom:2px}
.category-card .cat-count-txt{font-size:.8rem;color:#77778e;margin-bottom:16px}
.category-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.category-tags span{font-size:.75rem;color:#c9c9db;background:rgba(255,255,255,.05);border:1px solid var(--panel-border);padding:4px 10px;border-radius:8px}
.category-explore{font-size:.85rem;font-weight:500;color:var(--cat-color,var(--brandC));text-decoration:none;display:inline-flex;align-items:center;gap:6px}
.category-explore:hover{gap:9px}

/* All-tools flat grid + category detail grid */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.tool-row-card{display:block;background:var(--panel);border:1px solid var(--panel-border);border-radius:14px;padding:20px;text-decoration:none;transition:all .2s;position:relative}
.tool-row-card:hover{border-color:var(--cat-color,var(--brandA));transform:translateY(-2px)}
.tool-row-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:.95rem;margin-bottom:14px;background:var(--cat-glow);color:var(--cat-color)}
.tool-row-card h4{font-size:.96rem;font-weight:600;color:#fff;margin-bottom:3px}
.tool-row-card .t-cat{font-size:.74rem;color:#77778e;margin-bottom:14px}
.tool-row-foot{display:flex;align-items:center;justify-content:space-between}
.tool-row-free{font-size:.72rem;color:#77778e}
.tool-row-arrow{color:#77778e;font-size:.78rem;transition:transform .15s,color .15s}
.tool-row-card:hover .tool-row-arrow{color:var(--cat-color,var(--brandA));transform:translateX(3px)}

/* Home category strip (still used on category detail breadcrumb icon) */
.home-title{font-size:2.6rem;font-weight:700;letter-spacing:-.03em;line-height:1.1;margin-bottom:8px;color:#fff}
.home-title span{color:var(--primary)}
.home-sub{font-size:.95rem;color:#9d9db2;margin-bottom:40px;max-width:560px;line-height:1.6}
.home-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.cat-card{background:var(--panel);border:1px solid var(--panel-border);border-radius:14px;padding:24px;cursor:pointer;transition:all .2s;position:relative;overflow:hidden;text-decoration:none;display:block}
.cat-card:hover{transform:translateY(-3px);border-color:var(--cat-color,var(--brandA))}
.cat-card-icon{width:44px;height:44px;border-radius:10px;background:var(--cat-glow);display:flex;align-items:center;justify-content:center;font-size:1.1rem;color:var(--cat-color);margin-bottom:14px}
.cat-card h3{font-size:1.05rem;font-weight:600;color:#fff;margin-bottom:4px}
.cat-card p{font-size:.75rem;color:#77778e}
/* Tool Page */
.tool-title{font-size:1.8rem;font-weight:700;letter-spacing:-.02em;margin-bottom:6px;color:#fff}
.tool-desc{font-size:.85rem;color:#5a8580;margin-bottom:28px;line-height:1.5}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:28px;margin-bottom:20px;animation:fadeUp .35s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
/* Conv Type */
.conv-row{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.conv-group{flex:1;min-width:180px}
.conv-group label{display:block;font-size:.72rem;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em;font-weight:500}
.conv-group input,.conv-group select{width:100%;padding:10px 12px;background:var(--input);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:.88rem;outline:none;transition:border-color .2s}
.conv-group input:focus,.conv-group select:focus{border-color:var(--primary)}
.conv-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%235eead4' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.conv-group select option{background:var(--card);color:var(--text)}
.swap-btn{width:42px;height:42px;border-radius:50%;background:var(--glow);border:1px solid var(--border);color:var(--primary);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.9rem;transition:all .2s;flex-shrink:0;margin-bottom:1px}
.swap-btn:hover{background:var(--primary);color:#000;transform:rotate(180deg)}
/* Calc Type */
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.calc-group label{display:block;font-size:.72rem;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em;font-weight:500}
.calc-group input,.calc-group select{width:100%;padding:10px 12px;background:var(--input);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:.88rem;outline:none;transition:border-color .2s}
.calc-group input:focus,.calc-group select:focus{border-color:var(--primary)}
.calc-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%235eead4' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center}
.calc-group select option{background:var(--card);color:var(--text)}
.calc-group.full{grid-column:1/-1}
.calc-btn{margin-top:20px;padding:12px 32px;background:var(--primary);color:#000;border:none;border-radius:8px;font-family:inherit;font-size:.88rem;font-weight:600;cursor:pointer;transition:all .2s;letter-spacing:.01em}
.calc-btn:hover{filter:brightness(1.15);transform:translateY(-1px)}
.calc-btn:active{transform:translateY(0)}
/* Result */
.result-box{margin-top:20px;padding:18px 20px;background:var(--glow);border:1px solid var(--border);border-radius:10px;display:none}
.result-box.show{display:block;animation:fadeUp .3s ease}
.result-label{font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.result-value{font-size:1.5rem;font-weight:700;color:#fff;font-family:'JetBrains Mono',monospace;word-break:break-all}
.result-extra{font-size:.78rem;color:var(--muted);margin-top:6px}
/* Text Type */
.text-area{width:100%;min-height:130px;padding:12px;background:var(--input);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:.82rem;outline:none;resize:vertical;transition:border-color .2s;line-height:1.6}
.text-area:focus{border-color:var(--primary)}
.text-row{display:flex;gap:12px;align-items:center;margin:14px 0}
.text-btn{padding:9px 20px;border-radius:8px;border:1px solid var(--border);background:var(--glow);color:var(--primary);font-family:inherit;font-size:.8rem;font-weight:500;cursor:pointer;transition:all .2s}
.text-btn:hover{background:var(--primary);color:#000}
.text-btn.active{background:var(--primary);color:#000}
.copy-btn{margin-left:auto;padding:7px 14px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--muted);font-family:inherit;font-size:.72rem;cursor:pointer;transition:all .2s}
.copy-btn:hover{color:#fff;border-color:var(--primary)}
/* Color Type */
.color-preview{width:100%;height:80px;border-radius:10px;border:1px solid var(--border);margin-bottom:18px;transition:background .2s}
.color-inputs{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}
.color-group label{display:block;font-size:.72rem;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em;font-weight:500}
.color-group input[type="text"],.color-group input[type="number"]{width:100%;padding:9px 12px;background:var(--input);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:'JetBrains Mono',monospace;font-size:.85rem;outline:none;transition:border-color .2s}
.color-group input:focus{border-color:var(--primary)}
.color-group input[type="color"]{width:100%;height:38px;border:1px solid var(--border);border-radius:8px;background:var(--input);cursor:pointer;padding:2px}
/* Contrast */
.contrast-row{display:flex;gap:16px;align-items:stretch}
.contrast-swatch{flex:1;height:100px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:600;transition:all .2s}
.contrast-result{text-align:center;padding:20px}
.contrast-ratio{font-size:2.5rem;font-weight:700;font-family:'JetBrains Mono',monospace}
.contrast-badges{display:flex;gap:8px;justify-content:center;margin-top:12px}
.badge{padding:5px 14px;border-radius:6px;font-size:.72rem;font-weight:600;letter-spacing:.03em}
.badge.pass{background:rgba(34,197,94,.15);color:#22c55e;border:1px solid rgba(34,197,94,.3)}
.badge.fail{background:rgba(239,68,68,.15);color:#ef4444;border:1px solid rgba(239,68,68,.3)}
/* Countdown */
.countdown-display{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.cd-unit{text-align:center;padding:16px 20px;background:var(--glow);border:1px solid var(--border);border-radius:12px;min-width:90px}
.cd-num{font-size:2.2rem;font-weight:700;font-family:'JetBrains Mono',monospace;color:#fff}
.cd-label{font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;margin-top:4px}
/* GPA */
.gpa-row{display:flex;gap:10px;margin-bottom:10px;align-items:center}
.gpa-row input{flex:1;padding:9px 12px;background:var(--input);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:inherit;font-size:.82rem;outline:none}
.gpa-row input:focus{border-color:var(--primary)}
.gpa-row select{width:90px;padding:9px 8px;background:var(--input);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:inherit;font-size:.82rem;outline:none;cursor:pointer}
.gpa-row select option{background:var(--card)}
.gpa-del{width:32px;height:32px;border-radius:6px;border:1px solid var(--border);background:transparent;color:var(--muted);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;flex-shrink:0}
.gpa-del:hover{color:#ef4444;border-color:#ef4444}
.gpa-add{padding:8px 18px;border-radius:8px;border:1px dashed var(--border);background:transparent;color:var(--muted);font-family:inherit;font-size:.78rem;cursor:pointer;transition:all .15s;margin-top:6px}
.gpa-add:hover{color:var(--primary);border-color:var(--primary)}
/* Responsive */
@media(max-width:860px){
  .nav-links{display:none}
  .site-nav-inner #menu-toggle{display:flex}
  .site-nav-inner{padding:14px 20px}
}
@media(max-width:768px){
  #content{padding:36px 18px 40px}
  .conv-row{flex-direction:column}
  .calc-grid{grid-template-columns:1fr}
  .home-title{font-size:1.8rem}
  .hero h1{font-size:2.1rem}
  .hero-checks{gap:16px}
  .contrast-row{flex-direction:column}
  .categories-grid{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* Multi-page adaptation: reset anchor defaults on components reused as links */
.cat-card,.cat-card *,.tool-row-card,.tool-row-card *,.category-card *{text-decoration:none}
a.cat-card,a.tool-row-card{color:inherit}
a.cat-card:visited,a.tool-row-card:visited{color:inherit}

/* ====== SEO static content block (server-rendered, category-themed) ====== */
.seo-content{max-width:760px;margin:8px auto 0;padding:28px 20px 60px;color:var(--text);animation:none!important}
.seo-breadcrumb{font-size:.78rem;color:var(--muted);margin-bottom:18px}
.seo-breadcrumb a{color:var(--muted);text-decoration:none;transition:color .15s}
.seo-breadcrumb a:hover{color:var(--primary)}
.seo-content h1{font-size:1.6rem;font-weight:700;margin:0 0 14px;color:var(--text)}
.seo-content h2{font-size:1.1rem;font-weight:600;margin:0 0 12px;color:var(--text)}
.seo-content p{font-size:.92rem;line-height:1.65;color:var(--muted);margin:0 0 12px}
.seo-ref,.seo-faq{margin-top:28px;padding-top:24px;border-top:1px solid var(--border)}
.seo-ref-table{width:100%;border-collapse:collapse;font-size:.85rem;margin-top:4px}
.seo-ref-table td{padding:7px 10px;border-bottom:1px solid var(--border);color:var(--muted)}
.seo-ref-table td:first-child{color:var(--text);font-weight:500}
.seo-ref-table td:nth-child(2){text-align:center;width:24px;color:var(--muted2)}
.seo-faq-item{margin-bottom:16px}
.seo-faq-q{font-size:.88rem;font-weight:600;color:var(--text);margin:0 0 4px}
.seo-faq-a{font-size:.86rem;color:var(--muted);margin:0}
.seo-tool-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 20px}
.seo-tool-list li{border-bottom:1px solid var(--border);padding:8px 0}
.seo-tool-list a{color:var(--muted);text-decoration:none;font-size:.88rem;transition:color .15s}
.seo-tool-list a:hover{color:var(--primary)}
@media(max-width:768px){.seo-content{padding:20px 16px 40px}.seo-tool-list{grid-template-columns:1fr}}