/* =========================================================
   St Eric Robotics Club — shared design system
   ========================================================= */
:root{
  --bg:#0B1020;
  --card:#111827;
  --card-glass: rgba(17,24,39,0.5);
  --card-glass-strong: rgba(17,24,39,0.72);
  --border-glass: rgba(148,163,184,0.14);
  --border-glow: rgba(6,182,212,0.35);
  --primary:#06B6D4;
  --primary-soft: rgba(6,182,212,0.15);
  --secondary:#2563EB;
  --progress:#F59E0B;
  --completed:#22C55E;
  --planned:#64748B;
  --testing:#2563EB;
  --danger:#EF4444;
  --text:#E7ECF5;
  --text-dim:#93A0B7;
  --text-faint:#5C6884;
  --font-head:'Poppins', sans-serif;
  --font-body:'Inter', sans-serif;
  --radius:18px;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  overflow-x:hidden;
  line-height:1.6;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
ul{list-style:none;}
::selection{background:var(--primary-soft);color:#fff;}

.eyebrow{
  font-family:var(--font-head);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--primary);font-weight:700;display:flex;align-items:center;gap:.6rem;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);}
.section{position:relative;padding:7rem 6vw 6rem;max-width:1280px;margin:0 auto;}
.section-head{max-width:640px;margin-bottom:3rem;}
.section-head h2{font-family:var(--font-head);font-weight:700;font-size:clamp(1.8rem,3.4vw,2.6rem);margin-top:.7rem;letter-spacing:-0.01em;}
.section-head p{color:var(--text-dim);margin-top:.8rem;font-size:1.02rem;}

.glass{
  background:var(--card-glass);border:1px solid var(--border-glass);border-radius:var(--radius);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
}

.status-badge{
  display:inline-flex;align-items:center;gap:.4rem;font-family:var(--font-head);
  font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:.32rem .7rem;border-radius:100px;
}
.status-badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;}
.status-completed{color:var(--completed);background:rgba(34,197,94,.12);border:1px solid rgba(34,197,94,.28);}
.status-progress{color:var(--progress);background:rgba(245,158,11,.12);border:1px solid rgba(245,158,11,.28);}
.status-planned{color:var(--planned);background:rgba(100,116,139,.14);border:1px solid rgba(100,116,139,.3);}
.status-testing{color:var(--testing);background:rgba(37,99,235,.14);border:1px solid rgba(37,99,235,.32);}

.btn{
  font-family:var(--font-head);font-weight:600;font-size:.92rem;padding:.85rem 1.7rem;border-radius:100px;
  border:1px solid transparent;display:inline-flex;align-items:center;gap:.5rem;justify-content:center;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--secondary));color:#04101A;
  box-shadow:0 8px 30px -8px rgba(6,182,212,.55);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 34px -6px rgba(6,182,212,.7);}
.btn-ghost{color:var(--text);border-color:var(--border-glass);background:rgba(255,255,255,.02);}
.btn-ghost:hover{border-color:var(--border-glow);background:rgba(6,182,212,.07);transform:translateY(-2px);}
.btn-danger{color:#fecaca;border-color:rgba(239,68,68,.35);background:rgba(239,68,68,.08);}
.btn-danger:hover{background:rgba(239,68,68,.18);}
.btn-sm{padding:.55rem 1.1rem;font-size:.8rem;}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none !important;}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.16,.8,.3,1), transform .8s cubic-bezier(.16,.8,.3,1);}
.reveal.visible{opacity:1;transform:translateY(0);}
.reveal-delay-1{transition-delay:.08s;}
.reveal-delay-2{transition-delay:.16s;}
.reveal-delay-3{transition-delay:.24s;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; scroll-behavior:auto !important;}
}

/* ---------- circuit background ---------- */
.circuit-bg{position:absolute;inset:0;overflow:hidden;
  background:radial-gradient(ellipse 60% 50% at 25% 20%, rgba(6,182,212,.16), transparent 60%),
    radial-gradient(ellipse 55% 45% at 80% 75%, rgba(37,99,235,.20), transparent 60%),
    linear-gradient(180deg,#070b18 0%, #0B1020 55%, #0a0e1f 100%);
}
.circuit-bg svg{position:absolute;inset:0;width:100%;height:100%;opacity:.5;}
.circuit-bg .glow-orb{position:absolute;border-radius:50%;filter:blur(60px);animation:drift 14s ease-in-out infinite;}
.orb-1{width:340px;height:340px;background:rgba(6,182,212,.22);top:8%;left:10%;}
.orb-2{width:280px;height:280px;background:rgba(37,99,235,.24);bottom:10%;right:12%;animation-delay:-5s;}
.orb-3{width:200px;height:200px;background:rgba(6,182,212,.14);top:45%;left:60%;animation-delay:-9s;}
@keyframes drift{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(30px,-25px) scale(1.12);}}
.circuit-bg .sweep{position:absolute;inset:-50%;background:linear-gradient(115deg, transparent 40%, rgba(6,182,212,.06) 50%, transparent 60%);animation:sweep 8s linear infinite;}
@keyframes sweep{0%{transform:translateX(-20%);}100%{transform:translateX(20%);}}
.node{fill:var(--primary);opacity:.85;animation:pulse 3s ease-in-out infinite;}
.trace{stroke:rgba(148,197,214,.28);stroke-width:1;fill:none;}
@keyframes pulse{0%,100%{opacity:.35;r:2.2;}50%{opacity:1;r:3.4;}}

/* ---------- navbar ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;padding:1.1rem 6vw;
  display:flex;align-items:center;justify-content:space-between;
  transition:background .35s ease, border-color .35s ease, padding .35s ease;
  border-bottom:1px solid transparent;
}
header.solid{
  background:rgba(11,16,32,.72);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--border-glass);padding:.85rem 6vw;
}
.logo{font-family:var(--font-head);font-weight:700;font-size:1.05rem;display:flex;align-items:center;gap:.55rem;letter-spacing:-.01em;}
.logo .dot{
  width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--secondary));
  display:flex;align-items:center;justify-content:center;font-size:1.05rem;box-shadow:0 4px 18px -4px rgba(6,182,212,.6);
}
nav.desktop-nav{display:flex;gap:2.2rem;}
nav.desktop-nav a{font-family:var(--font-head);font-size:.86rem;font-weight:500;color:var(--text-dim);position:relative;transition:color .25s ease;}
nav.desktop-nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1.5px;background:var(--primary);transition:width .25s ease;}
nav.desktop-nav a:hover{color:var(--text);}
nav.desktop-nav a:hover::after{width:100%;}
.nav-actions{display:flex;align-items:center;gap:.9rem;}
.hamburger{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--border-glass);background:rgba(255,255,255,.03);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.hamburger span{width:16px;height:1.5px;background:var(--text);transition:transform .3s ease, opacity .3s ease;}
.hamburger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}
.mobile-panel{
  position:fixed;inset:0;z-index:90;background:rgba(8,12,26,.98);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2rem;
  transform:translateY(-100%);transition:transform .45s cubic-bezier(.16,.8,.3,1);
}
.mobile-panel.open{transform:translateY(0);}
.mobile-panel a{font-family:var(--font-head);font-size:1.5rem;font-weight:600;color:var(--text);}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--border-glass);padding:2.6rem 6vw;text-align:center;color:var(--text-faint);font-size:.84rem;}
footer .f-logo{font-family:var(--font-head);font-weight:700;color:var(--text);margin-bottom:.3rem;}
footer .f-tag{color:var(--primary);font-size:.75rem;letter-spacing:.15em;text-transform:uppercase;margin-bottom:1.2rem;}

/* ---------- gallery + lightbox (reused on project pages) ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1rem;}
.gallery-item{
  border-radius:14px;overflow:hidden;position:relative;cursor:pointer;height:190px;border:1px solid var(--border-glass);
  display:flex;align-items:flex-end;transition:transform .35s ease, border-color .35s ease;background-size:cover;background-position:center;
}
.gallery-item:hover{transform:translateY(-5px) scale(1.015);border-color:var(--border-glow);}
.gallery-item .g-caption{position:relative;z-index:2;padding:.9rem;font-family:var(--font-head);font-size:.8rem;font-weight:600;color:#fff;}
.gallery-item::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg, rgba(0,0,0,.65), transparent 55%);}
.gallery-item .g-icon{position:absolute;top:14px;right:14px;font-size:1.3rem;opacity:.9;z-index:2;}
.lightbox{
  position:fixed;inset:0;z-index:300;background:rgba(5,8,18,.94);display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:opacity .35s ease, visibility .35s ease;
}
.lightbox.open{opacity:1;visibility:visible;}
.lightbox-box{width:min(700px,88vw);max-height:76vh;border-radius:18px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--border-glass);position:relative;overflow:hidden;background:#070b16;}
.lightbox-box img, .lightbox-box video{width:100%;height:100%;max-height:76vh;object-fit:contain;}
.lightbox-cap{position:absolute;bottom:1rem;left:1.2rem;font-family:var(--font-head);font-weight:600;color:#fff;font-size:.95rem;text-shadow:0 2px 10px rgba(0,0,0,.5);z-index:2;}
.lightbox-close, .lightbox-nav{
  position:absolute;width:44px;height:44px;border-radius:50%;border:1px solid var(--border-glass);
  background:rgba(255,255,255,.06);display:flex;align-items:center;justify-content:center;color:#fff;z-index:3;
}
.lightbox-close{top:-58px;right:0;}
@media(max-width:700px){.lightbox-close{top:auto;bottom:-58px;right:0;}}
.lightbox-nav.prev{left:-58px;}
.lightbox-nav.next{right:-58px;}
@media(max-width:900px){.lightbox-nav.prev{left:6px;}.lightbox-nav.next{right:6px;}}

/* ---------- forms (login + admin) ---------- */
.field{margin-bottom:1.3rem;}
.field label{display:block;font-family:var(--font-head);font-size:.78rem;font-weight:600;letter-spacing:.03em;color:var(--text-dim);margin-bottom:.5rem;text-transform:uppercase;}
.field input[type="text"], .field input[type="email"], .field input[type="password"], .field input[type="url"],
.field textarea, .field select{
  width:100%;padding:.85rem 1rem;border-radius:12px;border:1px solid var(--border-glass);
  background:rgba(255,255,255,.03);color:var(--text);font-family:var(--font-body);font-size:.94rem;
  transition:border-color .25s ease, background .25s ease;
}
.field input:focus, .field textarea:focus, .field select:focus{outline:none;border-color:var(--border-glow);background:rgba(6,182,212,.05);}
.field textarea{resize:vertical;min-height:90px;}
.field .hint{color:var(--text-faint);font-size:.78rem;margin-top:.4rem;}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;}
@media(max-width:700px){.field-row{grid-template-columns:1fr;}}
.file-drop{
  border:1.5px dashed var(--border-glass);border-radius:14px;padding:1.4rem;text-align:center;
  color:var(--text-dim);font-size:.85rem;cursor:pointer;transition:border-color .25s ease, background .25s ease;
}
.file-drop:hover{border-color:var(--border-glow);background:rgba(6,182,212,.04);}
.thumb-row{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:.8rem;}
.thumb{width:78px;height:78px;border-radius:10px;object-fit:cover;border:1px solid var(--border-glass);}
.msg{padding:.8rem 1rem;border-radius:10px;font-size:.86rem;margin-bottom:1.2rem;display:none;}
.msg.show{display:block;}
.msg-error{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3);color:#fca5a5;}
.msg-success{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3);color:#86efac;}
.spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(255,255,255,.25);border-top-color:#fff;animation:spin .7s linear infinite;display:inline-block;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ---------- project cards (shared: home + group pages) ---------- */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.6rem;}
.project-card{padding:1.4rem;cursor:pointer;transition:transform .35s cubic-bezier(.16,.8,.3,1), border-color .35s ease, box-shadow .35s ease;display:flex;flex-direction:column;gap:1rem;}
.project-card:hover{transform:translateY(-7px);border-color:var(--border-glow);box-shadow:0 24px 50px -22px rgba(6,182,212,.4);}
.project-thumb{height:170px;border-radius:12px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;font-size:2.6rem;background:linear-gradient(135deg, rgba(6,182,212,.16), rgba(37,99,235,.16));border:1px solid var(--border-glass);background-size:cover;background-position:center;transition:transform .5s ease;}
.project-card:hover .project-thumb{transform:scale(1.045);}
.project-top{display:flex;align-items:center;justify-content:space-between;}
.project-card h3{font-family:var(--font-head);font-size:1.12rem;font-weight:600;}
.project-card p{color:var(--text-dim);font-size:.92rem;}
.project-tags{display:flex;gap:.4rem;flex-wrap:wrap;}
.tag-chip{font-size:.68rem;font-family:var(--font-head);font-weight:600;padding:.22rem .55rem;border-radius:100px;background:rgba(255,255,255,.05);border:1px solid var(--border-glass);color:var(--text-dim);}
.project-more{display:flex;align-items:center;gap:.4rem;font-family:var(--font-head);font-size:.8rem;font-weight:600;color:var(--primary);margin-top:auto;}
.project-more svg{transition:transform .3s ease;}
.project-card:hover .project-more svg{transform:translateX(5px);}
.empty-state{color:var(--text-dim);padding:2rem;text-align:center;}

/* ---------- spotlight / overlay project cards (category pages) ---------- */
.spotlight-card{
  position:relative;height:420px;border-radius:22px;overflow:hidden;cursor:pointer;
  background-size:cover;background-position:center;border:1px solid var(--border-glass);
  display:flex;align-items:flex-end;transition:transform .4s cubic-bezier(.16,.8,.3,1);
}
.spotlight-card:hover{transform:translateY(-4px);}
.spotlight-card::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg, rgba(6,10,20,.92) 0%, rgba(6,10,20,.55) 42%, rgba(6,10,20,.08) 75%, transparent 100%);
}
.spotlight-body{position:relative;z-index:2;padding:2.2rem 2.4rem;max-width:640px;}
.spotlight-eyebrow{display:flex;gap:.6rem;align-items:center;margin-bottom:.8rem;flex-wrap:wrap;}
.spotlight-body h3{font-family:var(--font-head);font-weight:700;font-size:2rem;color:#fff;letter-spacing:-.01em;margin-bottom:.6rem;}
.spotlight-body p{color:rgba(255,255,255,.82);font-size:1rem;margin-bottom:1.1rem;max-width:560px;}
.spotlight-cta{
  display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-head);font-weight:600;font-size:.86rem;
  color:#04101A;background:var(--primary);padding:.7rem 1.4rem;border-radius:100px;
}
.spotlight-empty{color:var(--text-dim);}

.pill-tabs{display:flex;gap:.6rem;flex-wrap:wrap;margin:2.4rem 0 1.6rem;}
.pill-tab{
  font-family:var(--font-head);font-size:.82rem;font-weight:600;color:var(--text-dim);
  padding:.55rem 1.1rem;border-radius:100px;border:1px solid var(--border-glass);
  background:rgba(255,255,255,.02);cursor:pointer;transition:all .25s ease;
}
.pill-tab:hover{border-color:var(--border-glow);color:var(--text);}
.pill-tab.active{background:var(--primary);border-color:var(--primary);color:#04101A;}

.overlay-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.4rem;}
.overlay-card{
  position:relative;height:230px;border-radius:16px;overflow:hidden;cursor:pointer;
  background-size:cover;background-position:center;border:1px solid var(--border-glass);
  display:flex;flex-direction:column;justify-content:space-between;
  transition:transform .35s cubic-bezier(.16,.8,.3,1), border-color .35s ease;
}
.overlay-card:hover{transform:translateY(-6px);border-color:var(--border-glow);}
.overlay-card::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(0deg, rgba(6,10,20,.9) 0%, rgba(6,10,20,.35) 55%, rgba(6,10,20,.05) 100%);
}
.overlay-top{position:relative;z-index:2;padding:.9rem;display:flex;justify-content:flex-start;}
.overlay-body{position:relative;z-index:2;padding:0 1.1rem 1.1rem;}
.overlay-body h4{font-family:var(--font-head);font-weight:700;font-size:1.05rem;color:#fff;margin-bottom:.3rem;}
.overlay-body p{color:rgba(255,255,255,.78);font-size:.82rem;}
.overlay-tags{display:flex;gap:.35rem;flex-wrap:wrap;margin-top:.55rem;}
.overlay-tag{font-size:.66rem;font-family:var(--font-head);font-weight:600;padding:.2rem .55rem;border-radius:100px;background:rgba(255,255,255,.14);color:#fff;}

/* ---------- groups ---------- */
.group-badge{
  font-size:.68rem;font-family:var(--font-head);font-weight:700;letter-spacing:.04em;
  padding:.26rem .6rem;border-radius:100px;color:var(--secondary);
  background:rgba(37,99,235,.12);border:1px solid rgba(37,99,235,.3);
  display:inline-flex;align-items:center;gap:.35rem;
}
.group-section{margin-bottom:3.4rem;}
.group-section:last-child{margin-bottom:0;}
.group-section-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-bottom:1.4rem;}
.group-section-head h3{font-family:var(--font-head);font-weight:700;font-size:1.25rem;}
.group-section-head a{font-family:var(--font-head);font-size:.82rem;font-weight:600;color:var(--primary);white-space:nowrap;}
.group-section-head a:hover{text-decoration:underline;}

.group-hero{position:relative;padding:8.5rem 6vw 3.5rem;text-align:center;overflow:hidden;}
.group-hero-inner{position:relative;z-index:2;max-width:700px;margin:0 auto;}
.group-hero h1{font-family:var(--font-head);font-weight:800;font-size:clamp(2rem,5vw,3.1rem);letter-spacing:-.02em;margin-top:.8rem;}
.group-hero p{color:var(--text-dim);margin-top:1rem;font-size:1.05rem;}

@media (max-width:860px){
  nav.desktop-nav{display:none;}
  .hamburger{display:flex;}
  .section{padding:5rem 6vw 4rem;}
}