/* 4EBPTC 2027 — institutional stylesheet */
:root{
  --navy:#1c3557;
  --navy-dark:#14273f;
  --maroon:#7a1f2b;
  --gold:#b08d3c;
  --grey-bg:#f3f4f6;
  --grey-line:#d8dbe0;
  --text:#24292f;
  --muted:#5f6670;
  --link:#1c4f8c;
  --font-serif:"Merriweather",Georgia,"Times New Roman",serif;
  --font-sans:"Open Sans","Segoe UI",Arial,Helvetica,sans-serif;
  --maxw:1140px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.65;color:var(--text);background:#fff}
img{max-width:100%;display:block}
a{color:var(--link)}
a:hover{color:var(--maroon)}
h1,h2,h3,h4{font-family:var(--font-serif);font-weight:700;line-height:1.3;color:var(--navy);margin:0 0 .6em}
h1{font-size:2rem}
h2{font-size:1.5rem;padding-bottom:.4rem;border-bottom:2px solid var(--gold);margin-top:2.2rem}
h2:first-child{margin-top:0}
h3{font-size:1.15rem;margin-top:1.6rem}
h4{font-family:var(--font-sans);font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;color:var(--navy);margin-bottom:.6rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.4rem}
li{margin:.25rem 0}
.container{width:min(var(--maxw),100% - 2rem);margin-inline:auto}
.muted{color:var(--muted)}
.small{font-size:.9rem}

/* Skip link */
.skip{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:.5rem 1rem;z-index:999}
.skip:focus{left:1rem;top:1rem}

/* Top bar */
.topbar{background:var(--navy-dark);color:#d5dce6;font-size:.82rem}
.topbar .container{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:.35rem 0}
.topbar a{color:#fff;text-decoration:none}
.topbar a:hover{text-decoration:underline}

/* Masthead */
.masthead{background:#fff;border-bottom:1px solid var(--grey-line)}
.masthead .container{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:1rem 0}
.brand{display:flex;align-items:center;gap:1rem;text-decoration:none;color:var(--navy)}
.brand img{width:84px;height:84px;flex:none}
@media(max-width:700px){.brand img{width:64px;height:64px}}
.brand-title{font-family:var(--font-serif);font-weight:700;font-size:1.35rem;line-height:1.2;display:block}
.brand-sub{display:block;font-size:.85rem;color:var(--muted);margin-top:.15rem}
.masthead-right{text-align:right;font-size:.85rem;color:var(--muted);line-height:1.45}
.masthead-right strong{color:var(--navy);display:block;font-size:.95rem}
@media(max-width:700px){.masthead-right{display:none}}

/* Navigation bar */
.navbar{background:var(--navy);position:sticky;top:0;z-index:50}
.navbar .container{display:flex;align-items:center;justify-content:space-between;position:relative}
.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:nowrap}
.nav a{display:block;padding:.8rem .85rem;color:#fff;text-decoration:none;font-size:.9rem;font-weight:600;white-space:nowrap;border-bottom:3px solid transparent}
.nav a:hover{background:var(--navy-dark);color:#fff}
.nav a.active{border-bottom-color:var(--gold)}
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.4);color:#fff;font:inherit;font-weight:600;padding:.45rem .8rem;margin:.4rem 0;cursor:pointer}
@media(max-width:1000px){
  .nav-toggle{display:inline-block}
  .nav{position:absolute;left:0;right:0;top:100%;background:var(--navy);display:none;border-top:1px solid rgba(255,255,255,.15)}
  .nav.open{display:block}
  .nav ul{flex-direction:column}
  .nav a{border-bottom:1px solid rgba(255,255,255,.1)}
}

/* Buttons */
.btn{display:inline-block;padding:.6rem 1.2rem;font-weight:600;font-size:.92rem;text-decoration:none;border:1px solid var(--navy);background:var(--navy);color:#fff;border-radius:2px}
.btn:hover{background:var(--navy-dark);color:#fff}
.btn-secondary{background:#fff;color:var(--navy)}
.btn-secondary:hover{background:var(--grey-bg);color:var(--navy)}
.btn-maroon{background:var(--maroon);border-color:var(--maroon)}
.btn-maroon:hover{background:#621822}
.btn.disabled{opacity:.6;pointer-events:none}

/* Banner (home) */
.banner{background:var(--navy-dark);color:#fff;border-top:4px solid var(--gold);position:relative;overflow:hidden}
.banner .slides{position:absolute;inset:0}
.banner .slide{position:absolute;inset:0;background-position:center;background-size:cover;opacity:0;transform:scale(1);transition:opacity 1.6s ease}
.banner .slide.is-active{opacity:1;animation:slideZoom 9s ease-out forwards}
@keyframes slideZoom{from{transform:scale(1)}to{transform:scale(1.06)}}
.banner .slide-video.is-active{animation:none}
.banner .slide video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.banner .slides::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,39,63,.92) 0%,rgba(20,39,63,.78) 45%,rgba(20,39,63,.30) 75%,rgba(20,39,63,.15) 100%)}
.banner .container{position:relative;z-index:1;padding:4rem 0 3.6rem;max-width:var(--maxw)}
.banner .kicker{font-size:.9rem;letter-spacing:.08em;text-transform:uppercase;color:#cfd8e6;margin-bottom:.8rem}
.banner h1{color:#fff;font-size:2.3rem;max-width:640px;margin-bottom:.6rem;text-shadow:0 2px 12px rgba(0,0,0,.35)}
.banner .theme{font-family:var(--font-serif);font-style:italic;font-size:1.25rem;color:#e6d9b3;margin-bottom:1.4rem;max-width:640px}
.banner .meta{display:flex;gap:2rem;flex-wrap:wrap;font-size:.98rem;margin-bottom:1.6rem;max-width:720px}
.banner .meta span{border-left:3px solid var(--gold);padding-left:.7rem}
.banner .actions{display:flex;gap:.7rem;flex-wrap:wrap}
.banner .btn{border-color:#fff;background:#fff;color:var(--navy)}
.banner .btn:hover{background:#e9edf3}
.banner .btn-outline{background:transparent;color:#fff}
.banner .btn-outline:hover{background:rgba(255,255,255,.12)}
.banner .credit{position:absolute;right:.8rem;bottom:.4rem;font-size:.7rem;color:rgba(255,255,255,.75);text-shadow:0 1px 3px rgba(0,0,0,.8);z-index:2}
.banner .credit a{color:inherit}
.banner .dots{position:absolute;left:50%;bottom:.7rem;transform:translateX(-50%);display:flex;gap:.45rem;z-index:2}
.banner .dots button{width:9px;height:9px;border-radius:50%;border:1px solid rgba(255,255,255,.8);background:rgba(0,0,0,.25);padding:0;cursor:pointer}
.banner .dots button.is-active{background:var(--gold);border-color:var(--gold)}
@media(prefers-reduced-motion:reduce){.banner .slide.is-active{animation:none}}
@media(max-width:700px){.banner .slides::after{background:rgba(20,39,63,.8)}}

/* Page title (inner pages) */
.page-title{background:var(--grey-bg);border-bottom:1px solid var(--grey-line);border-top:4px solid var(--gold)}
.page-title .container{padding:1.6rem 0}
.page-title h1{margin:0;font-size:1.8rem}
.crumbs{font-size:.82rem;color:var(--muted);margin-bottom:.4rem}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{text-decoration:underline}

/* Layout */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:3rem;padding:2.5rem 0 3.5rem}
@media(max-width:900px){.layout{grid-template-columns:1fr;gap:2rem}}
.content{min-width:0}
.sidebar{display:grid;gap:1.3rem;align-content:start}
.box{border:1px solid var(--grey-line);background:#fff}
.box-head{background:var(--navy);color:#fff;font-weight:700;font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;padding:.6rem .9rem}
.box-body{padding:.9rem}
.box-body ul{padding-left:1.1rem;margin:0}
.box-body li{margin:.35rem 0;font-size:.93rem}
.box-body p:last-child{margin:0}
.box.grey{background:var(--grey-bg)}
.box .btn{display:block;text-align:center;margin-top:.8rem}

/* Notice */
.notice{border:1px solid var(--grey-line);border-left:4px solid var(--maroon);background:#faf7f7;padding:.8rem 1rem;margin:0 0 1.4rem;font-size:.95rem}
.notice.info{border-left-color:var(--navy);background:#f5f7fa}
.notice p:last-child{margin:0}

/* Tables and date lists */
table{width:100%;border-collapse:collapse;font-size:.95rem;margin:0 0 1.4rem}
th,td{border:1px solid var(--grey-line);padding:.6rem .8rem;text-align:left;vertical-align:top}
th{background:var(--grey-bg);color:var(--navy);font-weight:700}
td.price{font-weight:700;color:var(--maroon);white-space:nowrap}
.table-wrap{overflow-x:auto}
.dates{list-style:none;padding:0;margin:0 0 1.4rem}
.dates li{display:grid;grid-template-columns:210px 1fr;gap:1rem;padding:.55rem 0;border-bottom:1px solid var(--grey-line);margin:0}
.dates li b{color:var(--navy)}
@media(max-width:560px){.dates li{grid-template-columns:1fr;gap:.1rem}}

/* Programme */
.sched{list-style:none;padding:0;margin:0 0 1.5rem}
.sched li{display:grid;grid-template-columns:130px 1fr;gap:1rem;padding:.5rem 0;border-bottom:1px solid var(--grey-line);font-size:.95rem;margin:0}
.sched time{font-weight:700;color:var(--navy);font-variant-numeric:tabular-nums}
.sched em{font-style:normal;color:var(--muted);display:block;font-size:.9rem}
@media(max-width:560px){.sched li{grid-template-columns:1fr;gap:.1rem}}

/* Topics */
.topic-list{columns:2;column-gap:2.5rem;padding-left:1.2rem}
.topic-list li{break-inside:avoid;margin:.35rem 0}
@media(max-width:640px){.topic-list{columns:1}}

/* Plain columns */
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:1.2rem;margin:0 0 1.4rem}
.cols .box-body{font-size:.94rem}
.cols h3{margin-top:0;font-size:1.05rem}

/* Committees and speakers */
.committee{list-style:none;padding:0;margin:0 0 1.4rem;columns:2;column-gap:2.5rem}
.committee li{break-inside:avoid;padding:.4rem 0;border-bottom:1px solid var(--grey-line);font-size:.95rem;margin:0}
.committee b{display:block;color:var(--navy)}
.committee span{color:var(--muted);font-size:.9rem}
@media(max-width:640px){.committee{columns:1}}
.speakers{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:1.5rem;margin:0 0 1.5rem}
.speaker{border:1px solid var(--grey-line);padding:1.2rem;display:grid;grid-template-columns:90px 1fr;gap:1rem;align-items:start}
.speaker .photo{width:90px;height:110px;background:var(--grey-bg);border:1px solid var(--grey-line);display:grid;place-items:center;font-size:.72rem;color:var(--muted);text-align:center;padding:.3rem}
.speaker h3{margin:0 0 .2rem;font-size:1.05rem}
.speaker .aff{font-size:.9rem;color:var(--muted)}

/* Partners */
.partners{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr));gap:1rem;margin:0 0 1rem}
.partner{border:1px solid var(--grey-line);padding:1rem;text-align:center;font-size:.85rem;color:var(--muted);background:#fff}
.partner .logo{height:80px;display:grid;place-items:center;margin-bottom:.6rem;color:var(--muted);font-size:.72rem}
.partner .logo img{max-height:72px;max-width:100%;width:auto;object-fit:contain}
.partner .logo.pending{background:var(--grey-bg)}
.partner .name{display:block;font-family:var(--font-serif);font-weight:700;color:var(--navy);font-size:.95rem;margin-bottom:.2rem}
.band{background:var(--grey-bg);border-top:1px solid var(--grey-line);border-bottom:1px solid var(--grey-line);padding:2rem 0}
.band h2{border:0;margin:0 0 1rem;font-size:1.2rem}

/* Series */
.series{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,170px),1fr));gap:1rem;margin:0 0 1.4rem}
.series a,.series>div{display:block;border:1px solid var(--grey-line);padding:.9rem 1rem;text-decoration:none;color:var(--text);font-size:.92rem}
.series a:hover{border-color:var(--navy);color:var(--text)}
.series .yr{font-family:var(--font-serif);font-weight:700;color:var(--maroon);font-size:1.15rem;border:0;padding:0}
.series b{display:block;color:var(--navy)}
.series div.current{border:2px solid var(--navy)}

/* FAQ */
details{border:1px solid var(--grey-line);margin-bottom:.5rem}
summary{cursor:pointer;font-weight:600;padding:.7rem .9rem;color:var(--navy);background:var(--grey-bg)}
details p{padding:.8rem .9rem 0;margin:0}
details p:last-child{padding-bottom:.9rem}

/* Forms */
.form{display:grid;gap:.9rem;max-width:720px}
.form label{font-weight:600;font-size:.9rem;display:block;margin-bottom:.25rem}
.form input,.form select,.form textarea{width:100%;padding:.55rem .7rem;border:1px solid #b9bfc7;font:inherit;border-radius:2px}
.form input[type=checkbox]{width:auto;margin-right:.5rem}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--navy)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:.9rem}
@media(max-width:600px){.form .row{grid-template-columns:1fr}}
.form-msg{display:none}

/* Map */
.map{border:1px solid var(--grey-line);margin:0 0 1.4rem}
.map iframe{display:block;width:100%;height:360px;border:0}

/* Footer */
.site-footer{background:var(--navy-dark);color:#c9d2de;font-size:.88rem;padding:2.5rem 0 1.2rem;border-top:4px solid var(--gold)}
.site-footer h4{color:#fff;margin-bottom:.6rem}
.site-footer a{color:#e6ecf4;text-decoration:none}
.site-footer a:hover{text-decoration:underline;color:#fff}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:.3rem 0}
.foot-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:2rem}
@media(max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}}
.foot-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:2rem;padding-top:1rem;font-size:.8rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:.6rem}

@media(max-width:600px){.topbar .container span:last-child{display:none}.topbar{font-size:.78rem}}

/* Intro (first visit of the session, home page only) */
html.intro-on{overflow:hidden}
.intro{position:fixed;inset:0;z-index:1000;background:#0f1d33;color:#fff;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;opacity:1;transition:opacity 1.1s ease,filter 1.1s ease,transform 1.1s ease}
.intro[hidden]{display:none}
.intro.out{opacity:0;filter:blur(10px);transform:scale(1.06);pointer-events:none}
.intro-bg{position:absolute;inset:-6%;background:url("../img/intro-kizkulesi.jpg") 65% center/cover no-repeat;opacity:0;transform:scale(1.02);filter:saturate(.9) brightness(.75)}
.intro.in .intro-bg{animation:introZoom 6s ease-out forwards}
@keyframes introZoom{0%{opacity:0;transform:scale(1.02)}25%{opacity:.7}100%{opacity:.7;transform:scale(1.14)}}
.intro-vignette{position:absolute;inset:0;background:radial-gradient(ellipse 70% 60% at 50% 50%,rgba(15,29,51,.15),rgba(15,29,51,.92) 100%),linear-gradient(180deg,rgba(15,29,51,.6),rgba(15,29,51,.2) 40%,rgba(15,29,51,.7))}
.intro-particles{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.intro-particles span{position:absolute;bottom:-8vh;font-family:var(--font-serif);color:#e6d9b3;opacity:0;animation:introFloat var(--dur,7s) linear var(--delay,0s) infinite;will-change:transform,opacity;filter:blur(var(--blur,0px))}
@keyframes introFloat{0%{transform:translateY(0) rotate(0deg);opacity:0}12%{opacity:var(--op,.35)}85%{opacity:var(--op,.35)}100%{transform:translateY(-115vh) translateX(var(--drift,0px)) rotate(var(--rot,0deg));opacity:0}}
.intro-inner{position:relative;padding:2rem;max-width:960px}
.intro-book{width:150px;height:auto;margin:0 auto 1.2rem;display:block;opacity:0;transform:translateY(10px);transition:opacity .6s ease,transform .6s ease}
.intro.in .intro-book{opacity:1;transform:none}
.intro-book .bk{stroke-dasharray:400;stroke-dashoffset:400}
.intro.in .intro-book .bk{animation:introDraw 1.6s ease forwards}
.intro.in .intro-book .ln{animation-delay:.7s;animation-duration:1.2s}
.intro-book .star{opacity:0;transform-origin:80px 13px;transform:scale(0)}
.intro.in .intro-book .star{animation:introStar .8s cubic-bezier(.2,.8,.3,1.4) 1.6s forwards}
@keyframes introDraw{to{stroke-dashoffset:0}}
@keyframes introStar{to{opacity:1;transform:scale(1)}}
.intro-line{font-family:var(--font-serif);font-weight:700;font-size:clamp(2.2rem,6.5vw,4.6rem);line-height:1.12;margin:0;text-shadow:0 4px 30px rgba(0,0,0,.45)}
.intro-l2{color:#e6d9b3;position:relative}
.intro-line span{display:inline-block;opacity:0;transform:translateY(.5em) scale(.92);filter:blur(8px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1),filter .7s ease;white-space:pre}
.intro.in .intro-line span{opacity:1;transform:none;filter:blur(0)}
.intro.out .intro-line span{opacity:0;filter:blur(6px);transform:translate(var(--dx,0),var(--dy,-40px)) rotate(var(--r,0deg)) scale(.8);transition:opacity .9s ease,transform 1.1s cubic-bezier(.2,.6,.3,1),filter .9s ease}
.intro-l2::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.55) 50%,transparent 70%);background-size:250% 100%;background-position:120% 0;mix-blend-mode:overlay;pointer-events:none;opacity:0}
.intro.in .intro-l2::after{animation:introShine 1.4s ease 2.4s forwards}
@keyframes introShine{0%{opacity:1;background-position:120% 0}100%{opacity:1;background-position:-40% 0}}
.intro-rule{width:0;height:2px;background:linear-gradient(90deg,transparent,var(--gold),transparent);margin:1.4rem auto;transition:width 1.2s ease 1.8s}
.intro.in .intro-rule{width:260px}
.intro-sub{font-size:.95rem;letter-spacing:.14em;text-transform:uppercase;color:#d5dce6;opacity:0;transform:translateY(8px);transition:opacity .8s ease 2.1s,transform .8s ease 2.1s;margin:0}
.intro-sub2{font-size:.85rem;color:#e6d9b3;margin-top:.3rem;transition-delay:2.4s}
.intro.in .intro-sub{opacity:1;transform:none}
.intro-skip{position:absolute;right:1.2rem;bottom:1.2rem;background:rgba(15,29,51,.5);border:1px solid rgba(255,255,255,.45);color:#fff;font:inherit;font-size:.8rem;padding:.35rem .9rem;cursor:pointer;border-radius:2px;z-index:2}
.intro-skip:hover{background:rgba(255,255,255,.15)}
@media(prefers-reduced-motion:reduce){.intro *{animation:none!important;transition-duration:.2s!important}.intro-line span{filter:none}.intro-bg{opacity:.5}.intro-book .bk{stroke-dashoffset:0}.intro-book .star{opacity:1;transform:none}}

/* Figures, venue block, footer logos */
figure{margin:0 0 1.4rem}
figure img{width:100%;height:auto;border:1px solid var(--grey-line)}
figure video{width:100%;height:auto;display:block;background:#000;border:1px solid var(--grey-line)}
figcaption{font-size:.8rem;color:var(--muted);margin-top:.35rem}
figcaption a{color:var(--muted)}
.venue-block{display:grid;grid-template-columns:1.1fr 1fr;gap:1.5rem;align-items:start;margin:0 0 1.4rem}
@media(max-width:700px){.venue-block{grid-template-columns:1fr}}
.foot-logos{display:flex;gap:2.5rem;align-items:center;flex-wrap:wrap;margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid rgba(255,255,255,.15)}
.foot-logos img{height:44px;width:auto}