/*
Theme Name: StudyToolsPro Homepage V5.4
Theme URI: https://studytoolspro.com/
Author: StudyToolsPro
Description: StudyToolsPro V5.3 with a clean homepage, normal header, working calculator category navigation, dedicated virtual category pages, and connected footer navigation.
Version: 5.4.0
Requires at least: 5.8
Requires PHP: 7.4
Text Domain: studytoolspro-v5
*/
:root{--bg:#070b16;--bg2:#0b1122;--card:#111a33;--line:#263452;--line2:#344565;--text:#f6f7fb;--muted:#8b96aa;--blue:#3d8bff;--cyan:#6bb5ff;--purple:#8d78ff;--green:#37d39a;--orange:#ffad13;--red:#ff5d6c}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 50% -10%,#182644 0,#070b16 46%);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}a{text-decoration:none;color:inherit}.container{width:min(1160px,92%);margin:auto}
.site-header{position:relative;width:100%;z-index:10;background:rgba(7,11,22,.97);backdrop-filter:blur(16px);border-bottom:1px solid rgba(52,69,101,.65)}.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:8px;padding-bottom:8px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:21px;white-space:nowrap;line-height:1}.home-link{color:#c7d6e6;font-size:14px;font-weight:700}.home-link:hover{color:#fff}.brand svg{flex:none}.brand .pro{color:var(--cyan)}.nav-links{display:flex;align-items:center;gap:22px}.nav-links>a,.drop-toggle{color:#c7d6e6;font-size:14px;font-weight:700}.nav-links>a:hover,.drop-toggle:hover{color:#fff}.drop{position:relative}.drop-toggle{background:none;border:0;cursor:pointer;font:inherit;padding:10px 0}.drop-menu{display:none;position:absolute;top:44px;left:50%;transform:translateX(-50%);width:230px;padding:8px;background:#0b1225;border:1px solid var(--line);border-radius:13px;box-shadow:0 18px 45px rgba(0,0,0,.4)}.drop:hover .drop-menu,.drop:focus-within .drop-menu{display:block}.drop-menu a{display:block;padding:10px 12px;border-radius:9px;color:#c7d6e6;font-size:13px;font-weight:700}.drop-menu a:hover{background:#0d2135;color:#fff}.menu{display:none;background:none;border:1px solid var(--line);color:#fff;border-radius:10px;padding:9px 12px;font-size:18px;cursor:pointer}
/* V5 header positioning fix: keep the fixed header fully visible with or without the WordPress admin bar. */
.hero{padding:82px 0 58px;text-align:center}.badge{display:inline-flex;padding:7px 13px;border:1px solid #245171;border-radius:999px;color:#9eeaff;background:rgba(41,151,255,.08);font-size:12px;font-weight:800}.hero h1{font-size:clamp(38px,6vw,68px);line-height:1.02;margin:20px auto 18px;max-width:850px;letter-spacing:-2.5px}.hero p{max-width:720px;margin:auto;color:var(--muted);font-size:17px}.actions{display:flex;justify-content:center;gap:12px;margin-top:28px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 19px;border-radius:11px;font-weight:800;font-size:14px;border:1px solid var(--line)}.btn.primary{background:linear-gradient(135deg,var(--blue),#1769c2);border-color:#318fe0}.btn.secondary{background:#0a1624}
.section{padding:58px 0}.section-head{text-align:center;margin-bottom:30px}.section-head h2{font-size:32px;margin:0 0 8px}.section-head p{color:var(--muted);margin:0}.category-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.category-card{display:block;padding:25px 20px;background:linear-gradient(180deg,#121c36,#0d152b);border:1px solid var(--line);border-radius:17px;transition:.2s;position:relative;overflow:hidden}.category-card:before{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:linear-gradient(90deg,var(--blue),var(--purple),var(--cyan));opacity:.6}.category-card:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:0 16px 42px rgba(0,0,0,.25)}.cat-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:13px;background:rgba(41,151,255,.1);color:#7ddfff;font-weight:900;margin-bottom:16px}.category-card h3{margin:0 0 6px;font-size:18px}.category-card p{margin:0 0 15px;color:var(--muted);font-size:13px}.category-card span{font-size:13px;color:#72d9ff;font-weight:800}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.info{padding:23px;border:1px solid var(--line);border-radius:16px;background:#0d162c}.info h3{margin:0 0 8px;font-size:17px}.info p{margin:0;color:var(--muted);font-size:14px}.faq{max-width:820px;margin:auto}details{border:1px solid var(--line);background:#0d162c;border-radius:12px;margin:10px 0;padding:15px 17px}summary{cursor:pointer;font-weight:800}details p{color:var(--muted);font-size:14px;margin:10px 0 0}
.page-hero{padding:55px 0 35px;text-align:center}.page-hero h1{font-size:clamp(34px,5vw,54px);margin:10px 0}.page-hero p{max-width:720px;margin:auto;color:var(--muted)}.directory-toolbar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:24px;flex-wrap:wrap}.search{width:min(500px,100%);padding:14px 16px;background:#0d162c;border:1px solid var(--line);border-radius:12px;color:#fff;outline:none;font-size:15px}.search:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(41,151,255,.1)}.directory-count{color:var(--muted);font-size:13px;font-weight:700}.calculator-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.calculator-card{background:linear-gradient(180deg,#121c36,#0d152b);border:1px solid var(--line);border-radius:16px;padding:20px;transition:.2s;position:relative;overflow:hidden}.calculator-card:before{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:linear-gradient(90deg,var(--blue),var(--purple),var(--cyan));opacity:.55}.calculator-card:hover{transform:translateY(-3px);border-color:var(--line2);box-shadow:0 14px 40px rgba(0,0,0,.25)}.num{width:42px;height:42px;display:grid;place-items:center;border-radius:11px;background:rgba(41,151,255,.1);color:#7ddfff;font-weight:900;margin-bottom:14px}.calculator-card h2{font-size:18px;margin:0 0 6px}.calculator-card p{font-size:13px;color:var(--muted);margin:0 0 16px}.calculator-card .open{font-size:13px;font-weight:800;color:#72d9ff}.empty{display:none;text-align:center;color:var(--muted);padding:30px;border:1px dashed var(--line);border-radius:14px}.cta{padding:48px 25px;border:1px solid var(--line2);border-radius:20px;text-align:center;background:radial-gradient(circle at 50% 0,rgba(41,151,255,.13),transparent 60%),#081522}
.site-footer{margin-top:40px;border-top:1px solid var(--line);padding:45px 0 25px;background:#060a14}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}.site-footer h3,.site-footer h4{margin-top:0}.footer-brand .footer-logo{display:inline-flex;margin-bottom:12px}.footer-brand .footer-logo span{font-size:21px;line-height:1}.footer-brand .footer-logo svg{display:block}.site-footer p,.site-footer a{font-size:13px;color:var(--muted)}.site-footer a{display:block;margin:7px 0}.site-footer a:hover{color:#fff}.copy{border-top:1px solid var(--line);margin-top:30px;padding-top:20px;text-align:center;color:#70879b;font-size:12px}
@media(max-width:900px){.category-cards{grid-template-columns:repeat(2,1fr)}.calculator-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.nav-links{display:none}.menu{display:block}.nav.mobile-open .nav-links{display:flex;position:absolute;left:4%;right:4%;top:100%;flex-direction:column;align-items:stretch;gap:3px;padding:12px;background:#0b1225;border:1px solid var(--line);border-radius:14px}.nav.mobile-open .nav-links>a,.nav.mobile-open .drop-toggle{padding:12px}.nav.mobile-open .drop-menu{position:static;transform:none;width:100%;display:block;margin-top:2px;box-shadow:none;border:0;background:#091827}.drop:hover .drop-menu{display:block}}
@media(max-width:560px){.hero{padding:58px 0 42px}.category-cards,.calculator-grid,.footer-grid{grid-template-columns:1fr}.section{padding:45px 0}.hero h1{letter-spacing:-1.5px}.directory-toolbar{align-items:stretch;flex-direction:column}.search{width:100%}}

/* V5.3 Calculator Result UI */
.stp53-calculator{max-width:920px!important;margin:32px auto!important;padding:0!important;background:transparent!important;border:0!important;box-shadow:none!important;color:var(--text)!important}
.stp53-calculator *{box-sizing:border-box}
.stp53-skin{display:grid;grid-template-columns:minmax(0,1.06fr) minmax(285px,.94fr);gap:30px;padding:30px;background:linear-gradient(145deg,#101b35,#0c1730);border:1px solid #263958;border-radius:25px;box-shadow:0 24px 70px rgba(0,0,0,.38)}
.stp53-left{min-width:0}
.stp53-right{min-height:375px;padding:28px 23px 22px;background:#0a1021;border:1px solid #172744;border-radius:17px;text-align:center;display:flex;flex-direction:column;align-items:center}
.stp53-ring{--ring:0%;--accent:var(--yellow);width:142px;height:142px;border-radius:50%;position:relative;display:grid;place-items:center;background:conic-gradient(from -90deg,var(--accent) var(--ring),#202b42 var(--ring));box-shadow:0 0 24px color-mix(in srgb,var(--accent) 38%,transparent);margin:0 auto 21px}
.stp53-ring:after{content:"";position:absolute;inset:9px;border-radius:50%;background:#0a1122}
.stp53-ring-inner{position:relative;z-index:2;max-width:118px;overflow:hidden}
.stp53-value{font-size:30px;font-weight:900;letter-spacing:-1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.stp53-label{font-size:10px;color:#8994aa;font-weight:800;letter-spacing:.5px;margin-top:3px;white-space:nowrap}
.stp53-badge{display:inline-flex;align-items:center;justify-content:center;min-width:88px;height:27px;padding:0 13px;border:1px solid;border-radius:16px;font-size:11px;font-weight:800;margin-bottom:15px}
.stp53-message{max-width:245px;min-height:52px;margin:0;color:#8993a9;font-size:12px;line-height:1.5;font-weight:700}
.stp53-note{width:100%;margin-top:12px;padding:13px 12px;border:1px solid #1c2a43;border-radius:11px;background:#10192c;text-align:left;color:#707c92;font-size:11px;line-height:1.45;font-weight:700}
.stp53-original-result{display:none!important}
.stp53-left .stp-calc,.stp53-left .card,.stp53-left section{max-width:none}
.stp53-left h1,.stp53-left h2,.stp53-left h3{color:#fff}
.stp53-left input,.stp53-left select,.stp53-left textarea,.stp53-field{background:#080e1e!important;color:#f4f7ff!important;border:1px solid #1e2d49!important;border-radius:11px!important}
.stp53-left button,.stp53-calc-button{border-radius:24px!important}
.stp53-left .stp-result{display:none!important}
@media(max-width:760px){.stp53-skin{grid-template-columns:1fr;padding:20px;gap:18px}.stp53-right{min-height:350px}.stp53-left{width:100%}}


/* V5.4 visual refinement: screenshot-inspired compact academic UI */
body{font-size:15px}
.site-header{box-shadow:0 8px 30px rgba(0,0,0,.16)}
.nav{min-height:72px;max-width:1160px;margin:auto;padding-left:0;padding-right:0}
.brand{font-size:20px;letter-spacing:-.3px}.brand .pro{color:#6bb5ff}
.nav-links>a,.drop-toggle{font-size:13px;color:#b9c3d5}.home-link{color:#cbd4e2}
.hero{padding:70px 0 50px}.hero h1{font-size:clamp(38px,5.5vw,62px);letter-spacing:-2.2px}.hero p{font-size:15px;max-width:650px}
.badge{color:#ffd27a;background:rgba(255,173,19,.08);border-color:rgba(255,173,19,.3)}
.btn.primary{background:linear-gradient(135deg,#ffb31b,#ff8515);border-color:#ffb31b;box-shadow:0 10px 28px rgba(255,157,20,.16)}
.btn.secondary{background:#10182e;border-color:#2a3855}
.category-card,.calculator-card,.info,details,.cta{border-color:#293857;box-shadow:0 12px 35px rgba(0,0,0,.12)}
.category-card:before,.calculator-card:before{background:linear-gradient(90deg,#ffb31b,#ff7b16);opacity:.9}
.cat-icon,.num{background:#18233e;border:1px solid #2a3a5d;color:#ffbd3c}
.category-card span,.calculator-card .open{color:#6bb5ff}
.section-head h2,.head h2{letter-spacing:-.7px}
.search{background:#0a1021;border-color:#293857}
.cta{background:radial-gradient(circle at 50% 0,rgba(255,173,19,.08),transparent 58%),#0d162c}
.site-footer{border-top-color:#263452}

/* Calculator shell, matched to the supplied reference: compact dark card + warm action/result accents. */
.stp53-skin{background:linear-gradient(145deg,#121c36,#0e162d);border-color:#2a3959;border-radius:24px;box-shadow:0 24px 70px rgba(0,0,0,.42);padding:28px}
.stp53-right{background:#090f20;border-color:#1c2945;border-radius:16px}
.stp53-ring{background:conic-gradient(from -90deg,var(--accent) var(--ring),#252e43 var(--ring));box-shadow:0 0 26px color-mix(in srgb,var(--accent) 28%,transparent)}
.stp53-note{background:#111a30;border-color:#22314f}
.stp53-left input,.stp53-left select,.stp53-left textarea,.stp53-field{background:#090f20!important;border-color:#253552!important}
.stp53-left button:not(.stp53-close),.stp53-calc-button{background:linear-gradient(135deg,#ffb31b,#ff8215)!important;border-color:#ffb31b!important;color:#fff!important;box-shadow:0 10px 24px rgba(255,157,20,.14)}
.stp53-left button:hover,.stp53-calc-button:hover{filter:brightness(1.06)}
.stp53-badge{background:rgba(255,255,255,.02)}