/* ════════════════════════════════════════════════════════════════
   SRC Conferences — public site (index, conference, register)
   Uses the dashboard's colour tokens, so mode and accent stay in sync.
   One bold element: the Tigris — a living river under every hero.
════════════════════════════════════════════════════════════════ */
:root{
  --font:'IBM Plex Sans','IBM Plex Sans Arabic','Segoe UI',Tahoma,Arial,sans-serif;
  --bg:#eef2f1; --surface:#fff; --surface-2:#f5f8f8; --ink:#14242e; --muted:#5b6c75; --line:#d6dfe0; --line-2:#e6ecec;
  --side:#10232c; --side-ink:#dce8ea; --side-muted:#8ba2aa; --side-line:#21363f;
  --accent:#0f6b7d; --accent-ink:#fff; --accent-soft:#e1eff1; --accent-strong:#0a5161;
  --ok:#2f7a45; --ok-soft:#e3f2e7; --warn:#a0640f; --warn-soft:#fbefd9; --bad:#b2392f; --bad-soft:#fae6e3; --info:#2e58a6; --info-soft:#e4ebf8;
  --radius:10px; --radius-sm:6px; --pad:24px; --gap:16px; --fs:15px;
  --shadow:0 1px 2px rgba(16,35,44,.05),0 4px 14px rgba(16,35,44,.05);
  color-scheme:light;
}
html[data-accent=brick]{--accent:#a5532f;--accent-soft:#f6e7df;--accent-strong:#80401f}
html[data-accent=palm]{--accent:#3d6b3a;--accent-soft:#e5efe3;--accent-strong:#2c5029}
html[data-accent=lapis]{--accent:#3448a8;--accent-soft:#e5e8f7;--accent-strong:#26378a}
html[data-density=compact]{--pad:16px;--gap:10px;--fs:14px}

/* dark tokens — applied by choice or by system preference */
html[data-mode=dark]{
  --bg:#0c161b; --surface:#13212a; --surface-2:#182833; --ink:#e2ebed; --muted:#94a8af; --line:#263a44; --line-2:#1f313a;
  --side:#0a1418; --side-ink:#dce8ea; --side-muted:#7f979f; --side-line:#1b2c34;
  --accent:#4fb3c4; --accent-ink:#06222a; --accent-soft:#163541; --accent-strong:#7fd0dd;
  --ok:#6cc488; --ok-soft:#173226; --warn:#e4ad55; --warn-soft:#3a2c14; --bad:#f08b80; --bad-soft:#3d1d1a; --info:#8eb0f0; --info-soft:#1b2a45;
  --shadow:0 1px 2px rgba(0,0,0,.3); color-scheme:dark;
}
html[data-mode=dark][data-accent=brick]{--accent:#e08a5f;--accent-soft:#3a2219;--accent-strong:#f3b08d}
html[data-mode=dark][data-accent=palm]{--accent:#86c27f;--accent-soft:#1f3320;--accent-strong:#aedca8}
html[data-mode=dark][data-accent=lapis]{--accent:#8d9cf2;--accent-soft:#1f2650;--accent-strong:#b5bff8}
@media (prefers-color-scheme:dark){
  html[data-mode=auto]{
    --bg:#0c161b; --surface:#13212a; --surface-2:#182833; --ink:#e2ebed; --muted:#94a8af; --line:#263a44; --line-2:#1f313a;
    --side:#0a1418; --side-ink:#dce8ea; --side-muted:#7f979f; --side-line:#1b2c34;
    --accent:#4fb3c4; --accent-ink:#06222a; --accent-soft:#163541; --accent-strong:#7fd0dd;
    --ok:#6cc488; --ok-soft:#173226; --warn:#e4ad55; --warn-soft:#3a2c14; --bad:#f08b80; --bad-soft:#3d1d1a; --info:#8eb0f0; --info-soft:#1b2a45;
    --shadow:0 1px 2px rgba(0,0,0,.3); color-scheme:dark;
  }
  html[data-mode=auto][data-accent=brick]{--accent:#e08a5f;--accent-soft:#3a2219;--accent-strong:#f3b08d}
  html[data-mode=auto][data-accent=palm]{--accent:#86c27f;--accent-soft:#1f3320;--accent-strong:#aedca8}
  html[data-mode=auto][data-accent=lapis]{--accent:#8d9cf2;--accent-soft:#1f2650;--accent-strong:#b5bff8}
}


:root{
  --display:'Bricolage Grotesque','IBM Plex Sans',system-ui,sans-serif;
  --night:#0a1f2b; --night-2:#0d2b3a; --night-3:#123f52;
  --on-night:#e6f1f3; --on-night-2:#9fbcc4;
  --glow:#3fd0de;                     /* bright river colour, used on dark surfaces */
  --sand:#e8bd62;                     /* date-palm gold: only for "what happens next" */
  --wrap:1200px; --r-lg:20px; --r-md:14px; --r-sm:10px;
  --ease:cubic-bezier(.2,.7,.2,1); --ease-out:cubic-bezier(.16,1,.3,1);
}
html[data-accent=brick]{--glow:#ff9e6e}
html[data-accent=palm]{--glow:#8fd77f}
html[data-accent=lapis]{--glow:#9aa8ff}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:120px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.65 var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:var(--accent)}
a:hover{color:var(--accent-strong)}
h1,h2,h3,h4{margin:0;line-height:1.12;font-weight:650;letter-spacing:-.02em;font-family:var(--display)}
p{margin:0}
:focus-visible{outline:2px solid var(--glow);outline-offset:3px;border-radius:4px}
.wrap{width:min(var(--wrap),100% - 40px);margin-inline:auto}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;z-index:90;background:var(--surface);padding:8px 12px;border-radius:8px}
.skip:focus{left:8px}
.ico{width:18px;height:18px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

/* reading progress */
.scroll-progress{position:fixed;inset:0 0 auto 0;height:3px;z-index:80;pointer-events:none}
.scroll-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--glow),var(--accent));transform-origin:0 50%;transform:scaleX(0)}

/* ── header ───────────────────────────────────────────────────── */
.site-top{position:sticky;top:0;z-index:60;transition:background .35s,box-shadow .35s,border-color .35s;border-bottom:1px solid transparent;background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(14px) saturate(1.3);-webkit-backdrop-filter:blur(14px) saturate(1.3)}
.site-top .wrap{display:flex;align-items:center;gap:20px;min-height:72px}
.site-top.over-hero{position:fixed;inset:0 0 auto 0;background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none;color:var(--on-night)}
.site-top.over-hero.scrolled{background:color-mix(in srgb,var(--night) 82%,transparent);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);border-bottom-color:rgba(255,255,255,.08)}
.site-top:not(.over-hero).scrolled{box-shadow:0 8px 30px rgba(10,31,43,.08);border-bottom-color:var(--line)}
.brand{display:flex;align-items:center;gap:11px;color:inherit;text-decoration:none}
.brand:hover{color:inherit}
.brand svg{width:38px;height:38px;flex:none}
.brand-wave{stroke-dasharray:40;animation:wave-draw 1.4s var(--ease-out) .2s both}
@keyframes wave-draw{from{stroke-dashoffset:40}to{stroke-dashoffset:0}}
.brand strong{display:block;font:650 16px/1.15 var(--display);letter-spacing:-.01em}
.brand small{display:block;font-size:12.5px;opacity:.7}
.nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav a{position:relative;color:inherit;opacity:.78;text-decoration:none;padding:9px 14px;border-radius:999px;font-size:15px;font-weight:500;transition:opacity .2s,background .2s}
.nav a:hover,.nav a[aria-current]{opacity:1}
.nav a:not(.nav-cta)::after{content:'';position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;background:var(--glow);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease-out)}
.nav a:not(.nav-cta):hover::after,.nav a[aria-current]:not(.nav-cta)::after{transform:scaleX(1)}
.nav .nav-cta{opacity:1;margin-left:8px;background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 20px color-mix(in srgb,var(--accent) 35%,transparent)}
.over-hero .nav .nav-cta{background:var(--on-night);color:var(--night);box-shadow:none}
.nav .nav-cta:hover{transform:translateY(-1px)}
.mode-btn{width:40px;height:40px;border-radius:50%;border:1px solid color-mix(in srgb,currentColor 22%,transparent);background:transparent;color:inherit;display:grid;place-items:center;cursor:pointer;transition:transform .5s var(--ease-out),border-color .2s}
.mode-btn:hover{transform:rotate(25deg);border-color:currentColor}
.mode-btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.mode-btn .sun{display:none}
html[data-mode=dark] .mode-btn .sun{display:block}
html[data-mode=dark] .mode-btn .moon{display:none}
@media (prefers-color-scheme:dark){html[data-mode=auto] .mode-btn .sun{display:block}html[data-mode=auto] .mode-btn .moon{display:none}}
.menu-btn{display:none;width:42px;height:42px;border:1px solid color-mix(in srgb,currentColor 22%,transparent);background:transparent;border-radius:12px;color:inherit;cursor:pointer;position:relative}
.menu-btn span:not(.sr){position:absolute;left:11px;right:11px;height:1.8px;border-radius:2px;background:currentColor;transition:transform .35s var(--ease-out),top .35s var(--ease-out)}
.menu-btn span:nth-child(1){top:15px}.menu-btn span:nth-child(2){top:24px}
.menu-open .menu-btn span:nth-child(1){top:20px;transform:rotate(45deg)}
.menu-open .menu-btn span:nth-child(2){top:20px;transform:rotate(-45deg)}

/* ── hero: the night river ───────────────────────────────────── */
.hero{position:relative;overflow:hidden;isolation:isolate;color:var(--on-night);background:
  radial-gradient(1200px 520px at 85% -10%,color-mix(in srgb,var(--glow) 18%,transparent),transparent 60%),
  radial-gradient(900px 600px at -10% 110%,color-mix(in srgb,var(--accent) 30%,transparent),transparent 60%),
  linear-gradient(170deg,var(--night) 0%,var(--night-2) 55%,var(--night-3) 100%)}
.hero::before{content:'';position:absolute;inset:0;z-index:-1;opacity:.35;background-image:radial-gradient(rgba(255,255,255,.22) 1px,transparent 1.2px);background-size:26px 26px;mask-image:linear-gradient(180deg,#000 0%,transparent 70%);-webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 70%)}
.hero-glow{position:absolute;z-index:-1;width:720px;height:720px;border-radius:50%;left:55%;top:-30%;background:radial-gradient(circle,color-mix(in srgb,var(--glow) 30%,transparent),transparent 65%);filter:blur(20px);transform:translate(calc(var(--px,0)*60px),calc(var(--py,0)*40px));transition:transform 1.2s var(--ease-out);animation:breathe 9s ease-in-out infinite alternate}
@keyframes breathe{from{opacity:.65;scale:1}to{opacity:1;scale:1.12}}
.river{position:absolute;z-index:-1;left:-4%;right:-4%;bottom:-2px;width:108%;height:62%;color:var(--glow);pointer-events:none;transform:translate(calc(var(--px,0)*-18px),calc(var(--py,0)*-8px));transition:transform 1.4s var(--ease-out)}
.river path{fill:none;stroke-linecap:round;vector-effect:non-scaling-stroke}
.river .base{stroke:url(#rg);stroke-width:1.2}
.river .r1.base{opacity:.55;stroke-width:1.8}.river .r2.base{opacity:.36}.river .r3.base{opacity:.24}.river .r4.base{opacity:.15}.river .r5.base{opacity:.09}
.river .current{stroke:color-mix(in srgb,var(--glow) 70%,#fff);stroke-width:2.2;stroke-dasharray:90 1400;stroke-dashoffset:1500;opacity:0;filter:drop-shadow(0 0 6px var(--glow))}
.loaded .river .current{opacity:.9;animation:current 7s linear infinite}
.loaded .river .r2.current{animation-duration:9s;animation-delay:-3s;opacity:.6}
.loaded .river .r3.current{animation-duration:11s;animation-delay:-6s;opacity:.45}
.loaded .river .r4.current{animation-duration:13s;animation-delay:-2s;opacity:.3}
.loaded .river .r5.current{animation-duration:15s;animation-delay:-8s;opacity:.2}
@keyframes current{to{stroke-dashoffset:0}}
.river .base{stroke-dasharray:1600;stroke-dashoffset:1600}
.loaded .river .base{animation:draw 2.4s var(--ease-out) forwards}
.loaded .river .r2.base{animation-delay:.12s}.loaded .river .r3.base{animation-delay:.24s}.loaded .river .r4.base{animation-delay:.36s}.loaded .river .r5.base{animation-delay:.48s}
@keyframes draw{to{stroke-dashoffset:0}}

.hero-grid,.c-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:56px;align-items:end}
.hero-grid{padding:150px 0 150px}
.c-hero{padding:140px 0 130px}
.hero-kicker{color:var(--on-night-2);font-size:15px;font-weight:500;display:flex;align-items:center;gap:10px}
.hero-kicker::before{content:'';width:28px;height:1.5px;background:var(--glow)}
.hero h1{font-family:var(--display);font-size:clamp(40px,6.4vw,84px);font-weight:700;line-height:.98;letter-spacing:-.045em;margin:18px 0 22px;color:#fff;max-width:16ch;text-wrap:balance;font-variation-settings:'opsz' 96}
.hero-conf h1{font-size:clamp(34px,4.8vw,64px);max-width:22ch;line-height:1.02}
.hero-lead{font-size:clamp(17px,1.5vw,19.5px);line-height:1.65;color:var(--on-night);opacity:.86;max-width:58ch}

/* split headline: words rise out of their own line box */
.split .w{display:inline-block;overflow:hidden;vertical-align:bottom;padding-bottom:.08em;margin-bottom:-.08em}
.split .w>span{display:inline-block}
.js .split .w>span{transform:translateY(105%);opacity:0}
.loaded .split .w>span{transform:none;opacity:1;transition:transform 1s var(--ease-out),opacity .6s;transition-delay:calc(var(--w)*55ms + 80ms)}
.js [data-rise]{opacity:0;transform:translateY(18px)}
.loaded [data-rise]{opacity:1;transform:none;transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);transition-delay:calc(var(--r)*90ms + 420ms)}

.hero-search{position:relative;display:flex;min-width:0;align-items:center;gap:8px;margin-top:32px;max-width:600px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:7px 7px 7px 46px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:border-color .3s,background .3s,box-shadow .3s}
.hero-search>.ico{position:absolute;left:16px;color:var(--on-night-2);width:20px;height:20px}
.hero-search:focus-within{border-color:var(--glow);background:rgba(255,255,255,.12);box-shadow:0 0 0 6px color-mix(in srgb,var(--glow) 18%,transparent)}
.hero-search input{flex:1;min-width:0;background:transparent;border:0;color:#fff;font:inherit;font-size:16.5px;padding:11px 4px}
.hero-search input::placeholder{color:var(--on-night-2)}
.hero-search input:focus{outline:none}
.hero-search button{border:0;border-radius:11px;background:var(--glow);color:var(--night);font:inherit;font-weight:600;padding:12px 22px;cursor:pointer;transition:transform .2s,filter .2s}
.hero-search button:hover{transform:translateY(-1px);filter:brightness(1.08)}
.hero-facts{display:flex;gap:40px;margin:34px 0 0;flex-wrap:wrap}
.hero-facts div{display:grid;gap:2px}
.hero-facts dt{color:var(--on-night-2);font-size:14px;order:2}
.hero-facts dd{margin:0;font:700 clamp(30px,3vw,40px)/1 var(--display);color:#fff;letter-spacing:-.03em;font-variant-numeric:tabular-nums}

/* "next to open" panel, glass over the river */
.next-up{position:relative;display:grid;gap:10px;padding:24px;border-radius:var(--r-lg);color:var(--on-night);text-decoration:none;background:linear-gradient(160deg,rgba(255,255,255,.12),rgba(255,255,255,.04));border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:0 30px 60px rgba(0,0,0,.25);overflow:hidden;transition:transform .5s var(--ease-out),border-color .3s}
.next-up::before{content:'';position:absolute;inset:0;background:radial-gradient(360px circle at var(--mx,50%) var(--my,0%),color-mix(in srgb,var(--glow) 22%,transparent),transparent 60%);opacity:0;transition:opacity .3s;pointer-events:none}
.next-up:hover{color:var(--on-night);transform:translateY(-4px);border-color:color-mix(in srgb,var(--glow) 60%,transparent)}
.next-up:hover::before{opacity:1}
.next-label{display:flex;align-items:center;gap:8px;color:var(--sand);font-size:14px;font-weight:600}
.live-dot{width:8px;height:8px;border-radius:50%;background:var(--sand);box-shadow:0 0 0 0 color-mix(in srgb,var(--sand) 60%,transparent);animation:ping 2s ease-out infinite}
@keyframes ping{70%{box-shadow:0 0 0 10px transparent}100%{box-shadow:0 0 0 0 transparent}}
.next-title{font:650 21px/1.25 var(--display);color:#fff;letter-spacing:-.015em}
.next-meta{display:flex;align-items:center;gap:8px;font-size:14.5px;color:var(--on-night-2)}
.next-go{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14.5px;color:var(--glow);margin-top:4px}
.next-go .ico{transition:transform .35s var(--ease-out)}
.next-up:hover .next-go .ico{transform:translateX(5px)}
.countdown{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:6px 0 4px}
.countdown>span{display:grid;justify-items:center;gap:2px;padding:12px 4px 10px;border-radius:12px;background:rgba(0,0,0,.22);border:1px solid rgba(255,255,255,.08)}
.countdown b{font:700 28px/1 var(--display);color:#fff;font-variant-numeric:tabular-nums;letter-spacing:-.02em;display:inline-block}
.countdown.big b{font-size:clamp(30px,3vw,40px)}
.countdown small{font-size:12px;color:var(--on-night-2)}
.countdown b.flip{animation:flip .5s var(--ease-out)}
@keyframes flip{0%{transform:translateY(-40%) rotateX(70deg);opacity:0}100%{transform:none;opacity:1}}
.next-up.static{cursor:default}
.next-up.static:hover{transform:none}

/* ── buttons & chips ─────────────────────────────────────────── */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 22px;border-radius:12px;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);font:inherit;font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;overflow:hidden;transition:transform .25s var(--ease-out),box-shadow .25s,background .2s,border-color .2s}
.btn:hover{color:var(--accent-ink);transform:translateY(-2px);box-shadow:0 10px 24px color-mix(in srgb,var(--accent) 30%,transparent)}
.btn:active{transform:translateY(0)}
.btn .ico{transition:transform .35s var(--ease-out)}
.btn:hover .ico:last-child{transform:translateX(3px)}
.btn.line{background:transparent;color:var(--ink);border-color:var(--line)}
.btn.line:hover{border-color:var(--accent);color:var(--accent);box-shadow:none}
.hero .btn.line{color:#fff;border-color:rgba(255,255,255,.28)}
.hero .btn.line:hover{border-color:#fff;background:rgba(255,255,255,.07)}
.btn.glow{background:var(--glow);border-color:var(--glow);color:var(--night)}
.btn.glow::after{content:'';position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.55) 50%,transparent 70%);transform:translateX(-120%);transition:transform .8s var(--ease-out)}
.btn.glow:hover{color:var(--night);box-shadow:0 12px 30px color-mix(in srgb,var(--glow) 40%,transparent)}
.btn.glow:hover::after{transform:translateX(120%)}
.btn.sm{min-height:38px;padding:0 15px;font-size:14px;border-radius:10px}
.btn.wide{width:100%}
.chip{display:inline-flex;align-items:center;gap:7px;white-space:nowrap;border-radius:999px;padding:4px 11px;font-size:12.5px;font-weight:600;background:var(--surface-2);color:var(--muted)}
.chip::before{content:'';width:7px;height:7px;border-radius:50%;background:currentColor}
.chip.open{background:var(--ok-soft);color:var(--ok)}
.chip.open::before{animation:ping-ok 2s ease-out infinite}
@keyframes ping-ok{0%{box-shadow:0 0 0 0 currentColor}70%,100%{box-shadow:0 0 0 6px transparent}}
.chip.upcoming{background:var(--accent-soft);color:var(--accent-strong)}
.chip.announced{background:var(--info-soft);color:var(--info)}
.chip.archived{background:var(--surface-2);color:var(--muted)}
.hero .chip{background:rgba(255,255,255,.1);color:var(--on-night)}
.notice{background:var(--bad-soft);color:var(--bad);border-radius:var(--r-sm);padding:14px 16px;margin-top:20px}

/* ── sections ────────────────────────────────────────────────── */
.section{padding:88px 0}
.section.tinted{background:linear-gradient(180deg,var(--surface-2),var(--bg));border-block:1px solid var(--line-2)}
.section-title{font-size:clamp(30px,3.6vw,46px);letter-spacing:-.035em;font-weight:700}
.section-lead{color:var(--muted);margin-top:10px;max-width:60ch;font-size:17px}
.sec-head{display:grid;gap:4px;margin-bottom:8px}
[data-reveal]{--i:0}
.js [data-reveal]{opacity:0;transform:translateY(26px)}
.js [data-reveal].in{opacity:1;transform:none;transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);transition-delay:calc(var(--i)*80ms)}

/* ── index: directory ────────────────────────────────────────── */
.directory{padding-top:72px}
.dir-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap}
.status-filter{display:flex;align-items:center;gap:10px}
.status-filter label{color:var(--muted);font-size:14px}
.status-filter select{font:inherit;font-size:14px;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:9px 12px;cursor:pointer}
.tabs{position:relative;display:flex;gap:4px;margin:26px 0 10px;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
.tabs a{display:inline-flex;align-items:baseline;gap:8px;padding:13px 16px;color:var(--muted);text-decoration:none;font-weight:500;white-space:nowrap;transition:color .2s}
.tabs a:hover,.tabs a[aria-current]{color:var(--ink)}
.tabs .n{font-size:12.5px;padding:1px 8px;border-radius:999px;background:var(--surface-2);font-variant-numeric:tabular-nums}
.tabs a[aria-current] .n{background:var(--accent-soft);color:var(--accent-strong)}
.tab-ink{position:absolute;left:0;bottom:-1px;height:2.5px;border-radius:3px;background:var(--accent);opacity:0;transition:transform .45s var(--ease-out),width .45s var(--ease-out),opacity .2s}
.result-line{color:var(--muted);font-size:15px;margin:20px 0 4px}
.empty{padding:56px 0;color:var(--muted)}
.empty h3{color:var(--ink);font-size:22px;margin-bottom:6px}

.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:26px}
.card{position:relative;display:flex;flex-direction:column;gap:12px;padding:24px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);cursor:pointer;isolation:isolate;transition:transform .5s var(--ease-out),box-shadow .5s var(--ease-out),border-color .3s}
.card::before{content:'';position:absolute;inset:-1px;z-index:-1;border-radius:inherit;padding:1px;background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),var(--accent),transparent 45%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .35s}
.card::after{content:'';position:absolute;inset:0;z-index:-1;border-radius:inherit;background:radial-gradient(500px circle at var(--mx,50%) var(--my,0%),color-mix(in srgb,var(--accent) 9%,transparent),transparent 50%);opacity:0;transition:opacity .35s}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 50px -18px color-mix(in srgb,var(--accent) 45%,rgba(10,31,43,.35));border-color:transparent}
.card:hover::before,.card:hover::after{opacity:1}
.card.is-archived{opacity:.85}
.card-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.card-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;color:var(--accent-strong);background:var(--accent-soft);transition:transform .6s var(--ease-out),background .3s}
.card-icon .ico{width:22px;height:22px}
.card:hover .card-icon{transform:rotate(-8deg) scale(1.08)}
.card-date{font-size:14px;color:var(--muted);margin-top:6px}
.card-date b{font:700 24px/1 var(--display);color:var(--ink);letter-spacing:-.03em;margin-right:4px}
.card h3{font-size:20.5px;line-height:1.22;letter-spacing:-.02em;text-wrap:pretty}
.card h3 a{color:var(--ink);text-decoration:none;background:linear-gradient(currentColor,currentColor) 0 100%/0 1.5px no-repeat;transition:background-size .5s var(--ease-out),color .3s}
.card:hover h3 a{color:var(--accent);background-size:100% 1.5px}
.card-org{color:var(--muted);font-size:14px;font-weight:500;margin-top:-4px}
.card-desc{color:var(--muted);font-size:14.5px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-facts{display:grid;gap:6px;font-size:14px}
.card-facts span,.deadline{display:inline-flex;align-items:center;gap:9px}
.card-facts .ico,.deadline .ico{width:16px;height:16px;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tags span{font-size:12.5px;color:var(--muted);background:var(--surface-2);border-radius:999px;padding:3px 11px}
.card-foot{margin-top:auto;padding-top:16px;border-top:1px dashed var(--line);display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px}
.deadline{font-size:13.5px;color:var(--muted)}
.deadline.open{color:var(--ink);font-weight:500}
.deadline.open .ico{color:var(--sand)}
.card-actions{display:flex;align-items:center;gap:8px}
.card-go{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);color:var(--ink);transition:transform .45s var(--ease-out),background .3s,color .3s,border-color .3s}
.card:hover .card-go{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);transform:rotate(-45deg)}

/* ── conference page ─────────────────────────────────────────── */
.crumbs{display:flex;flex-wrap:wrap;gap:10px;font-size:14.5px;color:var(--on-night-2)}
.crumbs a{color:var(--on-night);text-decoration:none}
.crumbs a:hover{color:var(--glow)}
.c-facts{display:flex;flex-wrap:wrap;align-items:center;gap:12px 26px;margin:26px 0 30px;font-size:15.5px}
.c-facts>span:not(.chip){display:inline-flex;align-items:center;gap:9px}
.c-facts .ico{color:var(--glow)}
.c-actions{display:flex;flex-wrap:wrap;gap:12px}
.ended{display:inline-block;border:1px solid rgba(255,255,255,.22);border-radius:12px;padding:12px 16px}
.subnav{position:sticky;top:72px;z-index:50;background:color-mix(in srgb,var(--surface) 90%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.subnav .wrap{position:relative;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.subnav a{padding:15px 14px;color:var(--muted);text-decoration:none;font-weight:500;font-size:15px;white-space:nowrap;transition:color .2s}
.subnav a:hover,.subnav a.on{color:var(--ink)}
.subnav .tab-ink{bottom:0}
.c-body{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:64px;padding:80px 0 8px}
.prose{display:grid;gap:16px;align-content:start}
.prose p{font-size:18px;line-height:1.8;max-width:64ch;color:color-mix(in srgb,var(--ink) 88%,var(--muted))}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px 26px}
.panel h2{font-size:19px;margin-bottom:16px}
.facts{display:grid;gap:14px;margin:0}
.facts div{display:grid;gap:2px;padding-bottom:14px;border-bottom:1px dashed var(--line)}
.facts div:last-child{border-bottom:0;padding-bottom:0}
.facts dt{color:var(--muted);font-size:13.5px}
.facts dd{margin:0;font-weight:500;overflow-wrap:anywhere}
.side-stack{display:grid;gap:18px;align-content:start;position:sticky;top:150px}

/* key dates: a horizontal route that fills up to today */
.roadmap{--progress:0;position:relative;list-style:none;margin:44px 0 0;padding:0;display:grid;grid-template-columns:repeat(var(--n),minmax(0,1fr));gap:20px}
.roadmap::before,.roadmap::after{content:'';position:absolute;top:19px;left:20px;right:20px;height:3px;border-radius:3px}
.roadmap::before{background:var(--line)}
.roadmap::after{background:linear-gradient(90deg,var(--accent),var(--glow));transform-origin:left;transform:scaleX(0);transition:transform 1.6s var(--ease-out) .3s}
.roadmap.in::after,html:not(.js) .roadmap::after{transform:scaleX(var(--progress))}
.roadmap li{position:relative;display:grid;gap:4px;justify-items:start;align-content:start}
.roadmap .dot{position:relative;z-index:1;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--surface);border:2px solid var(--line);color:#fff;margin-bottom:10px;transition:background .4s,border-color .4s}
.roadmap .dot .ico{width:18px;height:18px;stroke-width:2.4}
.roadmap .past .dot{background:var(--accent);border-color:var(--accent)}
.roadmap .next .dot{border-color:var(--sand);background:var(--surface)}
.roadmap .next .dot::after{content:'';width:12px;height:12px;border-radius:50%;background:var(--sand);box-shadow:0 0 0 0 color-mix(in srgb,var(--sand) 60%,transparent);animation:ping 2s ease-out infinite}
.roadmap b{font:650 17px/1.25 var(--display)}
.roadmap time{font-size:14.5px;color:var(--muted)}
.roadmap small{font-size:12.5px;font-weight:600;color:var(--muted)}
.roadmap .next small{color:color-mix(in srgb,var(--sand) 70%,var(--ink))}
.roadmap .past b{color:var(--muted)}

.tracks{list-style:none;margin:36px 0 0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.tracks li{position:relative;display:grid;grid-template-columns:52px 1fr;gap:6px 16px;padding:22px 24px;border-radius:var(--r-md);background:var(--surface);border:1px solid var(--line);transition:transform .45s var(--ease-out),border-color .3s,box-shadow .45s}
.tracks li:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 45%,var(--line));box-shadow:0 16px 36px -20px color-mix(in srgb,var(--accent) 50%,transparent)}
.t-num{grid-row:span 2;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font:700 18px var(--display);color:var(--accent-strong);background:var(--accent-soft);font-variant-numeric:tabular-nums}
.tracks h3{font-size:18px;line-height:1.3;align-self:center}
.tracks .topics{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.tracks .topics span{font-size:13px;background:var(--surface-2);border-radius:999px;padding:3px 11px;color:var(--ink)}
.speakers{list-style:none;margin:32px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.speakers li{display:grid;grid-template-columns:56px 1fr;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:18px;transition:transform .45s var(--ease-out),border-color .3s}
.speakers li:hover{transform:translateY(-3px);border-color:var(--accent)}
.speakers .initials{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;font:700 18px var(--display);color:#fff;background:linear-gradient(140deg,var(--accent),color-mix(in srgb,var(--glow) 80%,var(--accent)))}
.speakers b{display:block;font-weight:600;line-height:1.3}
.speakers small{color:var(--muted);font-size:14px}
.join{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:30px}
.join-card{position:relative;display:grid;gap:12px;align-content:start;padding:30px;border-radius:var(--r-lg);background:var(--surface);border:1px solid var(--line);overflow:hidden;isolation:isolate;transition:transform .5s var(--ease-out),box-shadow .5s}
.join-card::after{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),color-mix(in srgb,var(--accent) 10%,transparent),transparent 55%);opacity:0;transition:opacity .35s}
.join-card:hover{transform:translateY(-4px);box-shadow:0 22px 48px -22px color-mix(in srgb,var(--accent) 50%,transparent)}
.join-card:hover::after{opacity:1}
.join-ico{width:50px;height:50px;border-radius:14px;display:grid;place-items:center;color:var(--accent-strong);background:var(--accent-soft)}
.join-ico .ico{width:24px;height:24px}
.join-card h3{font-size:22px}
.join-card p{color:var(--muted)}
.join-card .btn{justify-self:start;margin-top:6px}
.page-plain{padding-top:80px;min-height:50vh}

/* ── register ────────────────────────────────────────────────── */
.auth{padding:36px 0 80px}
.auth-wrap{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.3fr);gap:28px;align-items:stretch}
.auth-intro{position:relative;overflow:hidden;isolation:isolate;border-radius:24px;color:var(--on-night);background:linear-gradient(165deg,var(--night),var(--night-3));min-height:560px}
.auth-intro .river{height:45%}
.auth-intro .hero-glow{left:20%;top:-40%;width:560px;height:560px}
.auth-intro-in{position:sticky;top:96px;padding:44px 40px;display:grid;gap:18px}
.auth-intro h1{font-size:clamp(34px,4vw,52px);font-weight:700;letter-spacing:-.04em;color:#fff;line-height:1}
.auth-intro p{color:var(--on-night-2);max-width:40ch}
.auth-intro a{color:var(--glow)}
.steps{list-style:none;counter-reset:s;margin:10px 0 0;padding:0;display:grid;gap:4px}
.steps li{counter-increment:s;position:relative;display:grid;gap:2px;padding:12px 0 12px 52px}
.steps li::before{content:counter(s);position:absolute;left:0;top:10px;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font:700 15px var(--display);color:var(--night);background:var(--glow)}
.steps li:not(:last-child)::after{content:'';position:absolute;left:17.5px;top:48px;bottom:-8px;width:1.5px;background:rgba(255,255,255,.18)}
.steps b{color:#fff;font-weight:600}
.steps span{color:var(--on-night-2);font-size:14px}
.auth-switch{font-size:15px}
.auth-panel{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:34px 36px;box-shadow:0 30px 70px -40px rgba(10,31,43,.35)}
.auth .form{display:grid;gap:26px}
.auth fieldset{border:0;margin:0;padding:0;display:grid;gap:14px;min-width:0}
.auth fieldset+fieldset{box-shadow:inset 0 1px 0 var(--line-2);padding-top:24px}
.auth legend{float:left;width:100%;font:650 18px var(--display);letter-spacing:-.01em;margin-bottom:2px;padding:0}
.auth label{display:grid;gap:6px;font-weight:500;font-size:14.5px}
.auth label .hint{display:block;margin-top:-2px;color:var(--muted);font-size:13px;font-weight:400}
.auth .hint{color:var(--muted);font-size:13px;font-weight:400}
.auth input:not([type=radio]),.auth select{width:100%;min-height:48px;background:var(--surface-2);color:var(--ink);border:1.5px solid transparent;border-radius:12px;padding:10px 14px;font:inherit;font-size:15px;transition:border-color .25s,background .25s,box-shadow .25s}
.auth input:not([type=radio]):hover,.auth select:hover{border-color:var(--line)}
.auth input:focus,.auth select:focus{outline:none;border-color:var(--accent);background:var(--surface);box-shadow:0 0 0 4px var(--accent-soft)}
.auth select.pulse{animation:pulse-field .8s var(--ease-out)}
@keyframes pulse-field{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 45%,transparent)}100%{box-shadow:0 0 0 12px transparent}}
.auth .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.role-choice{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.role-choice label{position:relative;display:block;cursor:pointer}
.role-choice input{position:absolute;opacity:0}
.role-choice span{position:relative;display:grid;gap:3px;align-content:start;height:100%;border:1.5px solid var(--line);border-radius:14px;padding:16px 16px 16px 58px;transition:border-color .25s,background .25s,transform .3s var(--ease-out)}
.role-choice .ico{position:absolute;left:16px;top:16px;width:30px;height:30px;padding:6px;border-radius:9px;background:var(--surface-2);color:var(--muted);transition:background .25s,color .25s}
.role-choice b{font-weight:600}
.role-choice small{color:var(--muted);font-size:13px;font-weight:400}
.role-choice label:hover span{border-color:var(--muted);transform:translateY(-2px)}
.role-choice input:checked+span{border-color:var(--accent);background:var(--accent-soft)}
.role-choice input:checked+span .ico{background:var(--accent);color:var(--accent-ink)}
.role-choice input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
.flash-ok,.flash-err{border-radius:12px;padding:13px 16px;margin-bottom:18px;animation:drop-in .5s var(--ease-out)}
.flash-ok{background:var(--ok-soft);color:var(--ok)}
.flash-err{background:var(--bad-soft);color:var(--bad)}
@keyframes drop-in{from{opacity:0;transform:translateY(-8px)}}
.site-top:not(.over-hero){color:var(--ink)}

/* ── footer ──────────────────────────────────────────────────── */
.site-foot{position:relative;overflow:hidden;isolation:isolate;background:var(--night);color:var(--on-night-2);padding:72px 0 30px;font-size:15px}
.foot-river{position:absolute;inset:0;z-index:-1;opacity:.6}
.foot-river .river{height:100%;bottom:auto;top:-10%}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px}
.foot-brand strong{display:block;color:#fff;font:650 22px var(--display);margin-bottom:8px}
.foot-brand p{max-width:44ch}
.site-foot h4{color:#fff;font-size:15px;margin-bottom:12px}
.site-foot a{display:block;width:fit-content;color:var(--on-night);text-decoration:none;padding:4px 0;background:linear-gradient(var(--glow),var(--glow)) 0 100%/0 1.5px no-repeat;transition:background-size .4s var(--ease-out),color .2s}
.site-foot a:hover{color:#fff;background-size:100% 1.5px}
.foot-end{border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding-top:20px;font-size:14px}

/* ── responsive ──────────────────────────────────────────────── */
@media (max-width:1060px){.cards{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:960px){
  .hero-grid,.c-hero,.c-body,.auth-wrap{grid-template-columns:minmax(0,1fr)}
  .hero-grid{padding:130px 0 120px;gap:36px}
  .c-hero{padding:120px 0 110px;gap:30px}
  .next-up{max-width:440px}
  .side-stack{position:static}
  .tracks{grid-template-columns:1fr}
  .auth-intro{min-height:0}
  .auth-intro-in{position:static;padding:34px 28px 120px}
  .roadmap{grid-template-columns:1fr;gap:0;margin-top:28px}
  .roadmap::before,.roadmap::after{top:20px;bottom:20px;left:19px;right:auto;width:3px;height:auto}
  .roadmap::after{transform-origin:top;transform:scaleY(0)}
  .roadmap.in::after{transform:scaleY(var(--progress))}
  .roadmap li{grid-template-columns:40px 1fr;column-gap:16px;padding-bottom:22px}
  .roadmap .dot{grid-row:span 3;margin:0}
}
@media (max-width:760px){
  .hero-copy,.next-up{min-width:0}
  .hero-search button{padding:12px 16px}
  .hero h1{font-size:clamp(34px,10vw,46px)}
  .nav{position:fixed;inset:72px 0 auto 0;flex-direction:column;align-items:stretch;gap:4px;padding:14px 20px 22px;background:var(--surface);color:var(--ink);border-bottom:1px solid var(--line);box-shadow:0 30px 50px rgba(0,0,0,.15);transform:translateY(-12px);opacity:0;visibility:hidden;transition:transform .35s var(--ease-out),opacity .25s,visibility .35s}
  .menu-open .nav{transform:none;opacity:1;visibility:visible}
  .nav a{padding:12px 14px}
  .nav .nav-cta,.over-hero .nav .nav-cta{margin:6px 0 0;text-align:center;justify-content:center;background:var(--accent);color:var(--accent-ink)}
  .menu-btn{display:block;margin-left:0}
  .mode-btn{margin-left:auto}
  .site-top .wrap{gap:10px}
  .brand small{display:none}
  .cards,.join{grid-template-columns:1fr}
  .hero-facts{gap:26px}
  .section{padding:64px 0}
  .auth .grid-2,.role-choice{grid-template-columns:1fr}
  .auth-panel{padding:24px 20px}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .countdown b{font-size:24px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .split .w>span,.js [data-rise],.js [data-reveal]{opacity:1!important;transform:none!important}
  .river .base{stroke-dashoffset:0}
  .river .current{display:none}
  .roadmap::after{transform:scaleX(var(--progress))}
}
@media print{.site-top,.river,.hero-search,.c-actions,.join,.subnav,.scroll-progress{display:none}.hero{background:none;color:#000}.hero h1{color:#000}}