/*
Theme Name: IJMCF Journal
Description: Clean academic theme for the International Journal of Mathematics and Computational Frontiers.
Version: 1.2
Text Domain: ijmcf
*/
:root{--ink:#12263A;--ink2:#4A5B6C;--teal:#0F6E7A;--tealdk:#0A525B;--line:#D5DCE3;--bg:#F7F9FB;--white:#fff}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 "Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif}
h1,h2,h3,h4{font-family:"Source Serif 4",Georgia,serif;line-height:1.2;margin:0 0 .6em;font-weight:600}
a{color:var(--teal)}a:hover{color:var(--tealdk)}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:99}

/* header */
.site-head{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.head-in{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{font-family:"Source Serif 4",Georgia,serif;font-weight:700;font-size:1.15rem;line-height:1.2;color:var(--ink);text-decoration:none;max-width:340px}
.brand small{display:block;font:500 .8rem "Source Sans 3",system-ui,sans-serif;color:var(--ink2)}
.nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:4px 22px;margin:0;padding:0}
.nav a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.95rem;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav .current-menu-item a{border-color:var(--teal)}
.nav-btn{display:none;background:none;border:1px solid var(--line);padding:8px 12px;font:600 .95rem inherit;border-radius:4px;color:var(--ink)}

/* hero */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden;
 background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);background-size:44px 44px}
.hero svg{position:absolute;right:0;bottom:0;width:62%;height:100%;opacity:.55;pointer-events:none}
.hero-in{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:48px;padding:80px 24px;align-items:end}
.hero h1{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:700;margin-bottom:.4em}
.hero p{color:#CFE0EA;max-width:56ch;margin:0 0 28px}
.btn{display:inline-block;padding:12px 22px;border-radius:4px;font-weight:600;text-decoration:none;margin:0 10px 10px 0}
.btn-p{background:#fff;color:var(--ink)}.btn-p:hover{background:#E4EEF3;color:var(--ink)}
.btn-s{border:1px solid rgba(255,255,255,.6);color:#fff}.btn-s:hover{background:rgba(255,255,255,.12);color:#fff}
.facts{background:rgba(10,24,38,.82);border:1px solid rgba(255,255,255,.2);padding:22px 24px;margin:0}
.facts div{display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.14)}
.facts div:last-child{border:0}
.facts dt{color:#9FB8C8}.facts dd{margin:0;font-weight:600;text-align:right}

/* sections */
.sec{padding:64px 0}
.sec h2{font-size:1.9rem}
.cols{display:grid;grid-template-columns:2fr 1fr;gap:56px}
.cols p{max-width:68ch;font-family:"Source Serif 4",Georgia,serif;font-size:1.02rem;line-height:1.75}
.links{list-style:none;margin:0;padding:0;border-top:2px solid var(--ink)}
.links li{border-bottom:1px solid var(--line)}
.links a{display:block;padding:14px 2px;color:var(--ink);text-decoration:none;font-weight:600}
.links a:hover{color:var(--teal)}
.links span{display:block;font-weight:400;font-size:.9rem;color:var(--ink2)}
.contact{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.contact-g{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.contact h3{font-size:1.05rem}.contact p{margin:0}

/* pages */
.page-head{background:var(--white);border-bottom:1px solid var(--line);padding:44px 0 28px}
.page-head h1{font-size:2.2rem;margin:0}
.entry{max-width:820px;margin:0 auto;padding:44px 24px 72px}
.entry img{max-width:100%;height:auto}
.entry table{border-collapse:collapse;width:100%;display:block;overflow-x:auto}
.entry th,.entry td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.entry th{background:#EEF2F6}

/* footer */
.site-foot{background:var(--ink);color:#B9CAD6;padding:36px 0;font-size:.92rem}
.site-foot a{color:#fff}
.foot-in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px}

@media(max-width:860px){
 .hero-in,.cols,.contact-g{grid-template-columns:1fr}
 .hero-in{padding:56px 24px}.hero svg{width:100%;opacity:.3}
 .nav-btn{display:block}
 .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:12px 24px}
 .nav.open{display:block}.nav ul{flex-direction:column}
 .head-in{position:relative}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* v1.1 refinements */
.site-head .wrap{max-width:1320px}
.brand{max-width:340px;font-size:1.02rem}
.nav ul{flex-wrap:nowrap;gap:4px 14px}
.nav a{white-space:nowrap;font-size:.92rem}
.admin-bar .site-head{top:32px}
@media(max-width:782px){.admin-bar .site-head{top:46px}}
@media(min-width:861px){.hero svg{width:44%;opacity:.4}}
@media(max-width:1320px){
 .head-in{position:relative}
 .nav-btn{display:block}
 .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:12px 24px}
 .nav.open{display:block}
 .nav ul{flex-direction:column;flex-wrap:wrap}
}

/* v1.2: headings, footer, publications blocks */
.mail-note{font-size:.95rem;margin:6px 0 0!important}.mail-note a{color:#fff}
.entry h2{font-size:1.7rem;margin-top:1.6em}
.entry h3{font-size:1.4rem;margin-top:1.4em}
.entry h5,.entry h6{font-family:"Source Serif 4",Georgia,serif}
.entry h4,.entry h5,.entry h6{font-size:1.15rem;margin-top:1.5em}
.site-foot{padding:44px 0 24px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1.4fr;gap:40px;line-height:1.7}
.foot-title{display:block;color:#fff;font-family:"Source Serif 4",Georgia,serif;margin-bottom:8px}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-copy{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);font-size:.85rem}
.vol-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;margin:24px 0}
.vol-card{display:block;background:#fff;border:1px solid var(--line);border-top:3px solid var(--teal);padding:20px;text-decoration:none;color:var(--ink)}
.vol-card strong{display:block;font-family:"Source Serif 4",Georgia,serif;font-size:1.2rem}
.vol-card span{color:var(--ink2);font-size:.95rem}
.article{background:#fff;border:1px solid var(--line);padding:16px 20px;margin:0 0 14px}
.article h4{margin:0 0 6px;font-size:1.1rem}
.article .meta{margin:0 0 10px;color:var(--ink2);font-size:.95rem}
.btn-pdf{display:inline-block;background:var(--teal);color:#fff!important;padding:6px 14px;border-radius:4px;text-decoration:none;font-weight:600;font-size:.9rem}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr}}