/* =========================================================================
   Tech Science Press - shared header / footer / buttons
   Same file is used on the publisher site AND inside the OJS theme.
   Everything is prefixed with .tsp- so it never fights with OJS styles.
   ========================================================================= */
:root{
  --tsp-navy:#1e3c72;
  --tsp-navy-dark:#0f1f41;
  --tsp-red:#c41e3a;
  --tsp-red-dark:#a3172f;
  --tsp-bg:#f6f8fb;
  --tsp-text:#1a1f2b;
  --tsp-muted:#5d667a;
  --tsp-line:#e2e7f0;
  --tsp-header-h:68px;
  --tsp-font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
.tsp-header,.tsp-header *,.tsp-footer,.tsp-footer *{box-sizing:border-box}
.tsp-header,.tsp-footer{font-family:var(--tsp-font);line-height:1.5}
.tsp-header a,.tsp-footer a{text-decoration:none}
.tsp-header ul,.tsp-footer ul{list-style:none;margin:0;padding:0}

.tsp-container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- buttons ---------- */
.tsp-btn{text-decoration:none!important;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:42px;padding:0 20px;border-radius:8px;border:2px solid transparent;
  font:600 15px/1 var(--tsp-font);cursor:pointer;white-space:nowrap;
  transition:background .2s,color .2s,border-color .2s,transform .15s,box-shadow .2s}
.tsp-btn:focus-visible{outline:3px solid rgba(30,60,114,.35);outline-offset:2px}
.tsp-btn-red{background:var(--tsp-red);color:#fff!important}
.tsp-btn-red:hover{background:var(--tsp-red-dark);box-shadow:0 6px 16px rgba(196,30,58,.28);transform:translateY(-1px)}
.tsp-btn-outline{background:transparent;color:var(--tsp-navy)!important;border-color:var(--tsp-navy)}
.tsp-btn-outline:hover{background:var(--tsp-navy);color:#fff!important}
.tsp-btn-sm{min-height:36px;padding:0 14px;font-size:14px}

/* ---------- header ---------- */
.tsp-header{position:sticky;top:0;z-index:1000;background:#fff;
  border-bottom:1px solid var(--tsp-line);box-shadow:0 2px 12px rgba(15,31,65,.06)}
.tsp-header-bar{display:flex;align-items:center;gap:24px;min-height:var(--tsp-header-h)}
.tsp-logo{display:flex;align-items:center;gap:10px;color:var(--tsp-navy)!important;
  font-weight:800;font-size:21px;letter-spacing:-.2px;white-space:nowrap;flex:0 0 auto}
.tsp-logo svg{width:34px;height:34px;color:var(--tsp-red);flex:0 0 auto}

.tsp-nav{flex:1 1 auto;min-width:0}
.tsp-nav ul{display:flex;align-items:center;justify-content:center;gap:4px}
.tsp-nav a{display:block;padding:9px 14px;border-radius:8px;white-space:nowrap;
  color:var(--tsp-text);font-weight:600;font-size:15px;transition:background .2s,color .2s}
.tsp-nav a:hover{background:var(--tsp-bg);color:var(--tsp-navy)}
.tsp-nav a.is-active{color:var(--tsp-red);background:#fdf0f2}

.tsp-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.tsp-login{padding:9px 12px;font-weight:700;font-size:14px;letter-spacing:.4px;
  color:var(--tsp-navy)!important;border-radius:8px}
.tsp-login:hover{background:var(--tsp-bg)}

/* hamburger (hidden on desktop) */
.tsp-burger{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--tsp-line);
  border-radius:10px;background:#fff;cursor:pointer;padding:0;position:relative}
.tsp-burger span,.tsp-burger span::before,.tsp-burger span::after{
  content:"";position:absolute;left:11px;right:11px;height:2px;background:var(--tsp-navy);
  border-radius:2px;transition:transform .25s,opacity .2s,top .25s}
.tsp-burger span{top:21px}
.tsp-burger span::before{left:0;right:0;top:-7px}
.tsp-burger span::after{left:0;right:0;top:7px}
.tsp-burger[aria-expanded="true"] span{background:transparent}
.tsp-burger[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.tsp-burger[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

/* tablet + mobile: collapse menu */
@media (max-width:991px){
  .tsp-header-bar{flex-wrap:wrap;gap:0;min-height:60px}
  .tsp-logo{font-size:19px;min-height:60px}
  .tsp-burger{display:block}
  .tsp-nav,.tsp-actions{display:none;width:100%;flex:0 0 100%}
  .tsp-header.is-open .tsp-nav,.tsp-header.is-open .tsp-actions{display:block}
  .tsp-nav ul{flex-direction:column;align-items:stretch;gap:2px;padding:6px 0 8px;border-top:1px solid var(--tsp-line)}
  .tsp-nav a{padding:13px 12px;font-size:16px}
  .tsp-actions{padding:8px 0 18px}
  .tsp-header.is-open .tsp-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .tsp-actions .tsp-btn-red{grid-column:1 / -1;min-height:48px}
  .tsp-actions .tsp-login,.tsp-actions .tsp-btn-outline{min-height:46px;display:inline-flex;align-items:center;justify-content:center;
    border:2px solid var(--tsp-navy);border-radius:8px;font-size:14px}
  .tsp-header.is-open{max-height:100vh;overflow-y:auto}
}
@media (max-width:380px){.tsp-logo span{font-size:17px}.tsp-logo svg{width:28px;height:28px}}

/* ---------- footer ---------- */
.tsp-footer{background:var(--tsp-navy-dark);color:#c9d3ea;padding:56px 0 0;margin-top:0}
.tsp-footer h4{color:#fff;font-size:15px;letter-spacing:.6px;text-transform:uppercase;margin:0 0 16px}
.tsp-footer a{color:#c9d3ea;transition:color .2s}
.tsp-footer a:hover{color:#fff}
.tsp-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.tsp-footer li{margin-bottom:10px;font-size:15px}
.tsp-footer-brand p{font-size:15px;max-width:340px;margin:12px 0 0}
.tsp-footer .tsp-logo{color:#fff!important}
.tsp-footer .tsp-logo svg{color:#ff6b84}
.tsp-footer-bottom{margin-top:40px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);
  font-size:14px;text-align:center;color:#93a1c4}
@media (max-width:900px){.tsp-footer-grid{grid-template-columns:1fr 1fr}.tsp-footer-brand{grid-column:1 / -1}}
@media (max-width:520px){.tsp-footer{padding-top:40px}.tsp-footer-grid{grid-template-columns:1fr 1fr;gap:28px 20px}}

/* =========================================================================
   Publisher homepage
   ========================================================================= */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;font-family:var(--tsp-font);color:var(--tsp-text);background:#fff;line-height:1.6;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* hero */
.hero{background:linear-gradient(135deg,#1e3c72 0%,#122a55 55%,#0f1f41 100%);color:#fff;text-align:center;
  padding:clamp(56px,9vw,104px) 0}
.hero h1{margin:0 0 14px;font-size:clamp(28px,5.2vw,46px);line-height:1.15;letter-spacing:-.5px}
.hero p{margin:0 auto 30px;max-width:640px;font-size:clamp(16px,2.4vw,19px);color:#dbe5fa}
.hero-btn{min-height:50px;padding:0 30px;font-size:16px}

/* sections */
.section{padding:clamp(44px,7vw,80px) 0;background:var(--tsp-bg)}
.section h2{margin:0;font-size:clamp(24px,3.6vw,32px);color:var(--tsp-navy);letter-spacing:-.3px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.section-sub{margin:6px 0 0;color:var(--tsp-muted)}
.search input{width:320px;max-width:100%;height:46px;padding:0 16px;border:1px solid var(--tsp-line);border-radius:10px;
  font:inherit;background:#fff;transition:border-color .2s,box-shadow .2s}
.search input:focus{outline:none;border-color:var(--tsp-navy);box-shadow:0 0 0 4px rgba(30,60,114,.12)}
@media (max-width:600px){.search,.search input{width:100%}}

/* journal cards */
.jgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.jcard{display:flex;flex-direction:column;background:#fff;border:1px solid var(--tsp-line);border-radius:14px;overflow:hidden;
  transition:transform .2s,box-shadow .2s}
.jcard[hidden]{display:none}
.jcard:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(15,31,65,.12)}
.jcover{text-decoration:none;display:flex;align-items:center;justify-content:center;height:150px;color:#fff;overflow:hidden}
.jcover span{font-size:40px;font-weight:800;letter-spacing:2px;text-shadow:0 2px 10px rgba(0,0,0,.25)}
.jcover img{width:100%;height:100%;object-fit:cover}
.jcover.v0{background:linear-gradient(135deg,#1e3c72,#2a5298)}
.jcover.v1{background:linear-gradient(135deg,#0f1f41,#1e3c72)}
.jcover.v2{background:linear-gradient(135deg,#a3172f,#c41e3a)}
.jcover.v3{background:linear-gradient(135deg,#155e75,#1e3c72)}
.jcover.v4{background:linear-gradient(135deg,#312e81,#1e3c72)}
.jbody{padding:20px 20px 8px;flex:1}
.jbody h3{margin:0 0 8px;font-size:19px;line-height:1.3}
.jbody h3 a{color:var(--tsp-navy);text-decoration:none}
.jbody h3 a:hover{color:var(--tsp-red)}
.jdesc{margin:0 0 10px;color:var(--tsp-muted);font-size:15px}
.jmeta{margin:0;font-size:13px;font-weight:600;color:var(--tsp-muted);letter-spacing:.3px}
.jactions{display:flex;gap:10px;flex-wrap:wrap;padding:16px 20px 20px}
.jactions .tsp-btn{flex:1 1 130px}
.empty{background:#fff;border:2px dashed #c8d2e6;border-radius:14px;padding:36px 24px;text-align:center;color:var(--tsp-muted)}
.empty h3{margin:0 0 8px;color:var(--tsp-navy)}
.empty p{margin:0 auto;max-width:560px}
@media (max-width:400px){.jgrid{grid-template-columns:1fr}}

/* about */
.about{background:#fff}
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center}
.about p{color:var(--tsp-muted);font-size:17px;margin:14px 0 18px}
.ticks{list-style:none;margin:0 0 26px;padding:0}
.ticks li{position:relative;padding:6px 0 6px 32px;font-weight:600}
.ticks li::before{content:"";position:absolute;left:0;top:9px;width:20px;height:20px;border-radius:50%;background:var(--tsp-red)
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m5.5 10.5 3 3 6-6.5' fill='none' stroke='%23fff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/20px no-repeat}
.about-cta{display:flex;gap:12px;flex-wrap:wrap}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stat{background:linear-gradient(135deg,#1e3c72,#0f1f41);color:#fff;border-radius:14px;padding:28px 20px;text-align:center}
.stat b{display:block;font-size:clamp(32px,5vw,44px);line-height:1.1}
.stat span{display:block;margin-top:6px;color:#c9d6f2;font-size:14px;font-weight:600}
@media (max-width:860px){.about-grid{grid-template-columns:1fr;gap:32px}}
@media (max-width:480px){.about-cta .tsp-btn{width:100%}}