:root{
  --surface:#b3e0f2; --shallow:#5fa8c9; --deep:#1a3a5c; --abyss:#0a1a2e; --trench:#020a10;
  --cyan:#4dd0e1; --cyan-bright:#7feaff;
  --coral:#ff8a8a; --coral-deep:#e06070;
  --pearl:#f0f5fa;
  --bio:#7eff8a; --bio-bright:#a0ffb0;
  --rust:#7a3a28; --rust-bright:#a85638;
  --bronze:#4a6c7f; --bronze-dark:#2e4a5c;
  --brass:#c8a858; --brass-dark:#8a7038;
  --ink:#e0ecf5; --ink-soft:#a8c0d0; --ink-muted:#6a8090; --ink-faint:#4a6070;
  --line:rgba(127,234,255,0.18); --line-soft:rgba(127,234,255,0.10);
  --shadow:0 8px 24px rgba(0,40,80,0.4);
  --shadow-deep:0 12px 40px rgba(0,20,40,0.6);
  --mono:'JetBrains Mono','Space Mono',ui-monospace,Menlo,Consolas,monospace;
  --serif:'Cormorant Garamond','EB Garamond',Georgia,'Times New Roman',serif;
  --hand:'Caveat','Comic Sans MS',cursive;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--serif);
  color:var(--ink);
  background:linear-gradient(180deg,#b3e0f2 0%,#1a3a5c 40%,#0a1a2e 100%);
  background-attachment:fixed;
  min-height:100vh;
  line-height:1.6;
  font-size:17px;
  overflow-x:hidden;
  position:relative;
}
/* faint water ripple overlay */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(127,234,255,0.06) 0 2px, transparent 3px),
    radial-gradient(circle at 70% 60%, rgba(127,234,255,0.05) 0 2px, transparent 3px),
    radial-gradient(circle at 40% 80%, rgba(255,255,255,0.04) 0 1px, transparent 2px);
  background-size:120px 120px,180px 180px,90px 90px;
  opacity:0.5;
  mix-blend-mode:screen;
}
#ambient-canvas{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:0.85;}
#main{position:relative;z-index:2;}
a{color:var(--cyan-bright);text-decoration:none;}
a:hover{color:var(--pearl);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{font-family:var(--mono);font-weight:600;letter-spacing:0.02em;color:var(--pearl);margin:0 0 0.5em;}
p{margin:0 0 1em;}
img{max-width:100%;display:block;}
.wrap{max-width:1240px;margin:0 auto;padding:0 24px;}
.muted{color:var(--ink-muted);}
/* deep-sea cable scrollbar */
::-webkit-scrollbar{width:12px;height:12px;}
::-webkit-scrollbar-track{background:#0a1a2e;}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#4a6c7f,#2e4a5c);border-radius:6px;border:2px solid #0a1a2e;}
::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,#5fa8c9,#4a6c7f);}

/* ----------------------------- Layout ----------------------------- */
.layout-with-sidebar{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;max-width:1240px;margin:0 auto;padding:32px 24px;}
.layout-main{min-width:0;}
@media (max-width:980px){.layout-with-sidebar{grid-template-columns:1fr;}}

/* ----------------------------- Header ----------------------------- */
.site-header{position:relative;z-index:5;background:linear-gradient(180deg,rgba(10,26,46,0.92),rgba(10,26,46,0.7));backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
.header-inner{max-width:1240px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;color:var(--pearl);}
.brand:hover{text-decoration:none;}
.brand-mark{width:46px;height:34px;flex:0 0 auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,0.5));}
.brand-name{display:block;font-family:var(--mono);font-weight:700;font-size:20px;letter-spacing:0.18em;color:var(--pearl);}
.brand-tag{display:block;font-family:var(--serif);font-style:italic;font-size:12px;color:var(--cyan);}
.main-nav{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto;}
.main-nav a{font-family:var(--mono);font-size:12px;letter-spacing:0.14em;color:var(--ink-soft);padding:8px 12px;border-radius:999px;border:1px solid transparent;transition:all .25s;}
.main-nav a:hover{color:var(--pearl);border-color:var(--line);background:rgba(127,234,255,0.06);text-decoration:none;}
.main-nav a.active{color:var(--abyss);background:var(--cyan-bright);border-color:var(--cyan-bright);}
.nav-toggle{display:none;font-family:var(--mono);background:transparent;border:1px solid var(--line);color:var(--ink-soft);padding:8px 12px;border-radius:8px;cursor:pointer;}
@media (max-width:760px){
  .nav-toggle{display:block;margin-left:auto;}
  .main-nav{display:none;width:100%;flex-direction:column;}
  .main-nav.open{display:flex;}
}

/* --------------------- Submarine bridge / portholes --------------------- */
.submarine-bridge{position:relative;background:#0d2137;border-bottom:1px solid var(--line);padding:48px 24px 56px;overflow:hidden;}
.submarine-bridge::before,.submarine-bridge::after{content:"";position:absolute;width:120px;height:6px;background:repeating-linear-gradient(90deg,#c8a858 0 14px,transparent 14px 22px);opacity:0.7;}
.submarine-bridge::before{top:14px;left:24px;}
.submarine-bridge::after{top:14px;right:24px;}
.bridge-heading{text-align:center;margin-bottom:8px;position:relative;z-index:2;}
.bridge-heading h1{font-size:clamp(28px,4vw,46px);margin:0;color:var(--pearl);text-shadow:0 2px 18px rgba(0,0,0,0.6);}
.bridge-heading .bridge-sub{display:block;font-family:var(--serif);font-style:italic;color:var(--cyan);font-size:18px;margin-top:6px;}
.bridge-lead{max-width:720px;margin:12px auto 28px;text-align:center;color:var(--ink-soft);font-size:17px;}
.bridge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:1080px;margin:0 auto;}
@media (max-width:820px){.bridge-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.bridge-grid{grid-template-columns:1fr;}}

.porthole{position:relative;width:100%;aspect-ratio:1/1;border-radius:50%;
  border:8px solid var(--bronze);box-shadow:inset 0 0 24px rgba(0,0,0,0.85),0 0 0 3px var(--bronze-dark),var(--shadow-deep);
  background:#020a10;overflow:hidden;isolation:isolate;}
.porthole::before{content:"";position:absolute;inset:0;border-radius:50%;z-index:5;pointer-events:none;
  background:
    radial-gradient(circle at 30% 24%, rgba(255,255,255,0.28) 0 28%, transparent 40%),
    linear-gradient(135deg, rgba(255,255,255,0.18) 0%, transparent 38%, transparent 62%, rgba(255,255,255,0.06) 100%);
  transition:opacity .5s;}
.porthole::after{content:"";position:absolute;inset:0;border-radius:50%;z-index:4;pointer-events:none;
  background:
    radial-gradient(circle at 22% 70%, rgba(255,255,255,0.22) 0 3px, transparent 4px),
    radial-gradient(circle at 78% 38%, rgba(255,255,255,0.18) 0 2px, transparent 3px),
    radial-gradient(circle at 60% 80%, rgba(255,255,255,0.2) 0 2px, transparent 3px),
    radial-gradient(circle at 40% 50%, rgba(255,255,255,0.12) 0 1px, transparent 2px);
  opacity:0.7;transition:opacity .5s;}
/* rivets around the rim */
.porthole .porthole-rivets{position:absolute;inset:0;border-radius:50%;z-index:6;pointer-events:none;
  background:
    radial-gradient(circle at 50% 4%, var(--brass) 0 3px, transparent 4px),
    radial-gradient(circle at 50% 96%, var(--brass) 0 3px, transparent 4px),
    radial-gradient(circle at 4% 50%, var(--brass) 0 3px, transparent 4px),
    radial-gradient(circle at 96% 50%, var(--brass) 0 3px, transparent 4px),
    radial-gradient(circle at 18% 18%, var(--brass) 0 2.5px, transparent 3.5px),
    radial-gradient(circle at 82% 18%, var(--brass) 0 2.5px, transparent 3.5px),
    radial-gradient(circle at 18% 82%, var(--brass) 0 2.5px, transparent 3.5px),
    radial-gradient(circle at 82% 82%, var(--brass) 0 2.5px, transparent 3.5px);}
.porthole-scene{position:absolute;inset:0;border-radius:50%;overflow:hidden;z-index:1;}
.porthole-still{width:100%;height:100%;object-fit:cover;
  filter:hue-rotate(-20deg) saturate(0.6) brightness(0.7) contrast(1.05);transition:filter .5s;}
.porthole-tint{position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(160deg,rgba(20,90,120,0.45),rgba(10,26,46,0.55));mix-blend-mode:overlay;}
.porthole-warning{position:absolute;top:6px;left:50%;transform:translateX(-50%);z-index:7;width:12px;height:12px;border-radius:50%;
  background:var(--coral);box-shadow:0 0 10px var(--coral);animation:blink-warning 1s step-end infinite;}
@keyframes blink-warning{0%,100%{opacity:1;}50%{opacity:0.15;}}
.porthole-creature{position:absolute;top:30%;left:0;width:120%;z-index:3;pointer-events:none;opacity:0;
  animation:creature-pass 9s linear infinite;animation-delay:var(--creature-delay,8s);}
@keyframes creature-pass{0%{transform:translateX(-150%);opacity:0;}10%{opacity:0.9;}60%{opacity:0.9;}70%{opacity:0;}100%{transform:translateX(150%);opacity:0;}}
.porthole-nameplate{position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);z-index:7;
  background:linear-gradient(180deg,var(--brass),var(--brass-dark));color:#1a1208;
  font-family:var(--mono);font-size:10px;letter-spacing:0.12em;padding:5px 16px;border-radius:8px 8px 0 0;
  box-shadow:0 -2px 8px rgba(0,0,0,0.4);white-space:nowrap;text-align:center;line-height:1.3;}
.porthole-nameplate b{display:block;font-size:11px;}
.porthole-nameplate span{font-size:9px;opacity:0.85;}
.porthole-link{position:absolute;inset:0;z-index:8;border-radius:50%;}
.porthole-meta{position:absolute;inset:0;z-index:6;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;
  padding:18px 14px 30px;text-align:center;opacity:0;transition:opacity .4s;}
.porthole:hover .porthole-meta{opacity:1;}
.porthole:hover::before,.porthole:hover::after{opacity:0.12;}
.porthole:hover .porthole-still{filter:hue-rotate(0) saturate(1) brightness(0.95);}
.porthole:hover .porthole-tint{opacity:0.4;}
.porthole:hover{box-shadow:inset 0 0 24px rgba(0,0,0,0.85),0 0 0 3px var(--cyan-bright),0 0 36px rgba(127,234,255,0.5);}
.porthole-title{font-family:var(--mono);font-size:13px;color:var(--pearl);text-shadow:0 2px 8px #000;margin:0 0 4px;}
.porthole-tags{display:flex;gap:4px;flex-wrap:wrap;justify-content:center;}
.cavity-tag{font-family:var(--mono);font-size:9px;letter-spacing:0.1em;color:var(--bio);background:rgba(0,40,30,0.6);border:1px solid rgba(126,255,138,0.3);padding:2px 6px;border-radius:999px;}

/* --------------------- Hydrothermal field / cards --------------------- */
.hydrothermal-field{position:relative;background:#1a2a3a;padding:48px 24px;overflow:hidden;}
.hydrothermal-field::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:0.6;
  background:
    radial-gradient(circle at 12% 80%, rgba(0,0,0,0.5) 0 60px, transparent 120px),
    radial-gradient(circle at 88% 90%, rgba(0,0,0,0.45) 0 80px, transparent 150px),
    radial-gradient(circle at 50% 100%, rgba(58,42,26,0.4) 0 120px, transparent 200px);}
.hydrothermal-head{max-width:1240px;margin:0 auto 28px;text-align:center;position:relative;z-index:2;}
.hydrothermal-head h2{font-size:clamp(24px,3vw,34px);color:var(--pearl);}
.hydrothermal-head p{color:var(--ink-soft);max-width:680px;margin:6px auto 0;}
.vent-chimney{position:absolute;bottom:0;width:30px;height:70px;background:linear-gradient(180deg,#3a2a1a,#1a0a0a);
  border-radius:50% 50% 6px 6px / 30% 30% 6px 6px;z-index:1;opacity:0.7;}
.vent-chimney.c1{left:14%;}
.vent-chimney.c2{right:18%;width:24px;height:54px;}
.stratum{position:relative;z-index:2;max-width:1240px;margin:0 auto 44px;padding:24px;border-radius:18px;
  background:rgba(8,20,36,0.55);border:1px solid var(--line-soft);backdrop-filter:blur(4px);box-shadow:var(--shadow);}
.stratum-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap;margin-bottom:18px;border-bottom:1px dashed var(--line);padding-bottom:12px;}
.stratum-era-label{font-family:var(--mono);font-size:15px;letter-spacing:0.08em;color:var(--cyan-bright);}
.stratum-era-meta{font-family:var(--serif);font-style:italic;font-size:14px;color:var(--ink-muted);}
.stratum-body{display:grid;gap:18px;}
.vent-grid{grid-template-columns:repeat(3,1fr);}
.bottle-grid{grid-template-columns:repeat(3,1fr);}
.flake-grid{grid-template-columns:repeat(4,1fr);}
@media (max-width:820px){.vent-grid,.bottle-grid{grid-template-columns:repeat(2,1fr);}.flake-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.vent-grid,.bottle-grid,.flake-grid{grid-template-columns:1fr;}}

/* Vent plume review card */
.vent-plume{position:relative;border-radius:16px;background:rgba(0,40,60,0.7);backdrop-filter:blur(4px);
  border:1px solid rgba(0,200,255,0.3);box-shadow:var(--shadow);overflow:hidden;
  animation:buoyancy 6s ease-in-out infinite;animation-delay:var(--buoy-delay,0s);}
@keyframes buoyancy{0%,100%{transform:translateY(0);}50%{transform:translateY(-8px);}}
.plume-stream{position:absolute;top:-18px;left:50%;transform:translateX(-50%);width:60%;height:40px;pointer-events:none;opacity:0.5;
  background:radial-gradient(ellipse at bottom, rgba(127,234,255,0.3), transparent 70%);}
.plume-link{display:block;color:inherit;}
.plume-img{width:100%;aspect-ratio:16/10;object-fit:cover;opacity:0.85;filter:saturate(0.85);}
.plume-body{padding:16px 18px 18px;position:relative;z-index:2;
  background:linear-gradient(180deg,rgba(0,30,50,0.2),rgba(0,40,60,0.7));}
.plume-cat{font-family:var(--mono);font-size:10px;letter-spacing:0.12em;color:var(--bio);text-transform:uppercase;}
.plume-title{font-family:var(--mono);font-size:16px;color:var(--pearl);margin:6px 0 8px;line-height:1.3;}
.plume-desc{font-size:15px;color:var(--ink-soft);margin:0 0 12px;}
.plume-tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px;}
.plume-tag{font-family:var(--mono);font-size:9px;color:var(--cyan);border:1px solid var(--line);padding:2px 7px;border-radius:999px;}
.plume-foot{display:flex;justify-content:space-between;font-family:var(--mono);font-size:11px;color:var(--ink-muted);}
.vent-plume:hover{box-shadow:0 14px 36px rgba(0,80,120,0.6),0 0 0 1px var(--cyan-bright);}
.vent-plume:hover .plume-img{opacity:1;filter:saturate(1);}
.vent-plume:hover::after{content:"";position:absolute;inset:auto 50% 0 50%;width:0;height:0;pointer-events:none;}

/* Drift bottle feature card */
.drift-bottle{position:relative;border-radius:50% 50% 20% 20% / 36% 36% 14% 14%;
  background:rgba(150,220,200,0.16);border:2px solid rgba(200,255,255,0.4);
  box-shadow:var(--shadow),inset 0 0 30px rgba(127,234,255,0.15);overflow:hidden;
  min-height:300px;display:flex;flex-direction:column;align-items:center;padding:26px 18px 18px;
  animation:bottle-drift 12s ease-in-out infinite;animation-delay:var(--drift-delay,0s);
  --rotation:0deg;--drift:0px;}
@keyframes bottle-drift{0%,100%{transform:rotate(var(--rotation)) translateX(0);}50%{transform:rotate(calc(var(--rotation) + 3deg)) translateX(var(--drift));}}
.bottle-cork{position:absolute;top:-6px;left:50%;transform:translateX(-50%);width:34px;height:18px;
  background:linear-gradient(180deg,#8a5a30,#5a3818);border-radius:50% 50% 6px 6px;cursor:pointer;z-index:5;
  box-shadow:0 2px 6px rgba(0,0,0,0.5);transition:transform .4s;}
.drift-bottle.uncorked .bottle-cork{transform:translateX(-50%) translateY(-22px) rotate(8deg);}
.bottle-scroll{position:relative;width:100%;flex:1;background:linear-gradient(180deg,#efe6cf,#e0d2b0);
  border-radius:8px;padding:14px;color:#3a2e1f;box-shadow:inset 0 0 12px rgba(120,90,40,0.3);
  transform:translateY(8px);transition:transform .5s, max-height .5s;max-height:280px;overflow:hidden;}
.drift-bottle.uncorked .bottle-scroll{transform:translateY(0);max-height:600px;}
.bottle-link{display:block;color:inherit;}
.bottle-img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:4px;margin-bottom:8px;filter:sepia(0.15);}
.bottle-title{font-family:var(--mono);font-size:14px;color:#2a2018;margin:0 0 6px;line-height:1.3;}
.bottle-desc{font-family:var(--serif);font-size:14px;color:#4a3a28;margin:0 0 8px;}
.bottle-meta{font-family:var(--mono);font-size:10px;color:#6a5838;display:flex;justify-content:space-between;}
.drift-bottle:hover{border-color:var(--cyan-bright);box-shadow:var(--shadow-deep),inset 0 0 30px rgba(127,234,255,0.3);}

/* Sediment flake quick-news card */
.sediment-flake{position:relative;background:#d4c9b0;color:#3a2e1f;border-radius:6px;
  clip-path:polygon(8% 0%, 92% 4%, 100% 40%, 94% 100%, 12% 96%, 0% 60%);
  padding:18px 16px;box-shadow:var(--shadow);transform:rotate(var(--flake-rot,0deg));
  font-family:var(--hand);transition:transform .3s;}
.sediment-flake:hover{transform:rotate(0deg) translateY(-4px);}
.flake-link{display:block;color:inherit;}
.flake-thumb{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:4px;margin-bottom:8px;filter:sepia(0.2) brightness(0.9);}
.flake-time{font-family:var(--mono);font-size:10px;color:#6a5838;letter-spacing:0.08em;}
.flake-title{font-family:var(--hand);font-size:20px;line-height:1.15;margin:4px 0;color:#2a2018;}
.flake-desc{font-size:15px;color:#4a3a28;margin:0;}
.flake-coord{font-family:var(--mono);font-size:9px;color:#7a6848;margin-top:8px;display:block;}

/* Wide feature card */
.wide-feature{display:grid;grid-template-columns:1.1fr 1fr;gap:0;border-radius:16px;overflow:hidden;
  background:rgba(8,20,36,0.7);border:1px solid var(--line);box-shadow:var(--shadow);}
@media (max-width:680px){.wide-feature{grid-template-columns:1fr;}}
.feature-link{display:contents;color:inherit;}
.feature-img{width:100%;height:100%;min-height:220px;background-size:cover;background-position:center;position:relative;
  filter:saturate(0.9) brightness(0.92);}
.feature-img::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(127,234,255,0.18),transparent 60%);}
.feature-body{padding:22px 24px;}
.feature-meta{display:flex;gap:14px;flex-wrap:wrap;font-family:var(--mono);font-size:11px;color:var(--ink-muted);margin-bottom:8px;}
.feature-cat{color:var(--bio);}
.feature-title{font-family:var(--mono);font-size:22px;color:var(--pearl);margin:0 0 10px;}
.feature-desc{font-size:16px;color:var(--ink-soft);margin:0 0 12px;}
.feature-tags{display:flex;gap:6px;flex-wrap:wrap;}
.feature-tag{font-family:var(--mono);font-size:9px;color:var(--cyan);border:1px solid var(--line);padding:2px 7px;border-radius:999px;}
.wide-feature:hover{box-shadow:var(--shadow-deep);border-color:var(--cyan-bright);}

/* Depth column timeline */
.depth-column{max-width:1240px;margin:24px auto 0;padding:18px;border-radius:14px;background:rgba(4,12,22,0.6);border:1px solid var(--line-soft);}
.depth-column h3{font-family:var(--mono);font-size:13px;color:var(--cyan);letter-spacing:0.1em;margin:0 0 14px;text-align:center;}
.depth-bands{display:flex;flex-direction:column;gap:10px;}
.depth-band{position:relative;padding:10px 14px;border-left:4px solid var(--band-color);border-radius:6px;background:rgba(0,30,50,0.4);transition:background .3s;}
.depth-band:hover{background:rgba(0,50,80,0.6);}
.depth-zone{font-family:var(--mono);font-size:11px;letter-spacing:0.1em;color:var(--cyan-bright);}
.depth-count{font-family:var(--serif);font-style:italic;font-size:13px;color:var(--ink-muted);float:right;}
.depth-fossils{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px;}
.depth-fossil{width:42px;height:42px;border-radius:50%;background-size:cover;background-position:center;border:1px solid var(--line);filter:hue-rotate(-20deg) saturate(0.6);}
.depth-hint{font-family:var(--serif);font-style:italic;font-size:13px;color:var(--ink-muted);text-align:center;margin:10px 0 0;}

/* Empty card */
.empty-card{padding:24px;text-align:center;color:var(--ink-muted);font-family:var(--serif);font-style:italic;border:1px dashed var(--line);border-radius:12px;}
.empty-glyph{font-size:28px;color:var(--ink-faint);display:block;margin-bottom:6px;}

/* Genre strip + pagination */
.genre-strip{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;padding:20px 24px;max-width:1240px;margin:0 auto;}
.genre-pill{font-family:var(--mono);font-size:12px;color:var(--ink-soft);background:rgba(0,30,50,0.5);border:1px solid var(--line);padding:7px 14px;border-radius:999px;transition:all .25s;}
.genre-pill:hover{color:var(--pearl);border-color:var(--cyan-bright);text-decoration:none;}
.genre-pill.active{color:var(--abyss);background:var(--cyan-bright);border-color:var(--cyan-bright);}
.pagination{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;padding:24px;}
.page-num{font-family:var(--mono);font-size:13px;color:var(--ink-soft);background:rgba(0,30,50,0.5);border:1px solid var(--line);width:38px;height:38px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all .2s;}
.page-num:hover{color:var(--pearl);border-color:var(--cyan-bright);text-decoration:none;}
.page-num.active{color:var(--abyss);background:var(--cyan-bright);border-color:var(--cyan-bright);}

/* ----------------------------- Sidebar ----------------------------- */
.lab-side{display:flex;flex-direction:column;gap:22px;}
.side-block{background:rgba(8,20,36,0.7);border:1px solid var(--line-soft);border-radius:14px;padding:18px;box-shadow:var(--shadow);}
.side-block h3{font-family:var(--mono);font-size:12px;letter-spacing:0.12em;color:var(--cyan-bright);text-transform:uppercase;margin:0 0 14px;border-bottom:1px dashed var(--line);padding-bottom:8px;}
.side-list{list-style:none;margin:0;padding:0;}
.side-list li{margin:0 0 8px;}
.side-list a{font-size:14px;color:var(--ink-soft);}
.side-list a:hover{color:var(--cyan-bright);}

/* Sonar hot list */
.sonar-screen{position:relative;width:100%;aspect-ratio:1/1;max-width:240px;margin:0 auto;border-radius:50%;
  background:radial-gradient(circle,#001a08 0,#000a04 100%);border:2px solid var(--bio);box-shadow:0 0 18px rgba(126,255,138,0.3),inset 0 0 20px rgba(0,0,0,0.8);overflow:hidden;}
.sonar-grid{position:absolute;inset:0;border-radius:50%;
  background:repeating-radial-gradient(circle, transparent 0 24px, rgba(126,255,138,0.12) 24px 25px),
    radial-gradient(circle, transparent 49%, rgba(126,255,138,0.25) 50%, transparent 51%);}
.sonar-sweep{position:absolute;top:50%;left:50%;width:50%;height:2px;transform-origin:left center;
  background:linear-gradient(90deg,rgba(126,255,138,0.9),transparent);animation:sonar-sweep 4s linear infinite;}
@keyframes sonar-sweep{0%{transform:rotate(0deg);}100%{transform:rotate(360deg);}}
.sonar-blip{position:absolute;width:8px;height:8px;border-radius:50%;background:var(--bio);box-shadow:0 0 8px var(--bio);transform:translate(-50%,-50%);cursor:pointer;transition:transform .2s;}
.sonar-blip.hover,.sonar-blip:hover{transform:translate(-50%,-50%) scale(2.2);z-index:5;}
.sonar-blip .blip-tip{position:absolute;left:14px;top:-6px;background:#001a08;border:1px solid var(--bio);color:var(--bio-bright);font-family:var(--mono);font-size:9px;padding:3px 6px;border-radius:4px;white-space:nowrap;opacity:0;transition:opacity .2s;pointer-events:none;}
.sonar-blip.hover .blip-tip,.sonar-blip:hover .blip-tip{opacity:1;}

/* Bioluminescence comments */
.bio-window{position:relative;background:linear-gradient(180deg,#04101c,#020a10);border:1px solid var(--line);border-radius:10px;padding:14px;min-height:150px;overflow:hidden;}
.bio-creature{position:absolute;width:30px;cursor:pointer;opacity:0.85;transition:all .3s;color:var(--bio);}
.bio-creature:nth-child(1){top:10px;left:12%;animation:bio-drift 9s ease-in-out infinite;}
.bio-creature:nth-child(2){top:40px;left:60%;animation:bio-drift 11s ease-in-out infinite 1s;}
.bio-creature:nth-child(3){top:80px;left:30%;animation:bio-drift 8s ease-in-out infinite 2s;}
.bio-creature:nth-child(4){top:55px;left:78%;animation:bio-drift 10s ease-in-out infinite 0.5s;}
@keyframes bio-drift{0%,100%{transform:translate(0,0);}50%{transform:translate(14px,-10px);}}
.bio-creature.pulsed,.bio-creature:hover{transform:scale(1.6);opacity:1;filter:drop-shadow(0 0 8px var(--bio-bright));}
.bio-creature .bio-tip{position:absolute;left:34px;top:-4px;font-family:var(--serif);font-style:italic;font-size:12px;color:var(--bio-bright);background:rgba(0,20,10,0.9);border:1px solid var(--bio);padding:3px 7px;border-radius:6px;white-space:nowrap;opacity:0;transition:opacity .2s;pointer-events:none;}
.bio-creature.pulsed .bio-tip,.bio-creature:hover .bio-tip{opacity:1;}
.jellyfish-svg{width:30px;height:42px;}

/* Searchlight vote */
.searchlight-vote{position:relative;background:radial-gradient(circle at 50% 40%,#04101c,#000 100%);border:1px solid var(--line);border-radius:10px;padding:14px;min-height:200px;overflow:hidden;cursor:none;}
.searchlight-cone{position:absolute;width:220px;height:220px;border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;z-index:4;
  background:radial-gradient(circle,rgba(255,244,200,0.28) 0%,rgba(255,244,200,0.08) 40%,transparent 70%);mix-blend-mode:screen;}
.vote-head{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;color:var(--ink-muted);margin-bottom:8px;}
.ship-options{display:flex;justify-content:space-around;align-items:center;padding-top:30px;position:relative;z-index:2;}
.ship-object{position:relative;width:90px;text-align:center;opacity:0.25;transition:opacity .3s,filter .3s;filter:grayscale(1);}
.ship-object svg{width:64px;height:64px;}
.ship-object.lit{opacity:1;filter:none;drop-shadow(0 0 10px var(--brass));}
.object-label{display:block;font-family:var(--mono);font-size:10px;color:var(--brass);margin-top:4px;}
.object-count{display:block;font-family:var(--mono);font-size:14px;color:var(--pearl);}

/* Dive log */
.dive-log{background:linear-gradient(180deg,#2a2018,#1a1208);border:1px solid var(--brass-dark);border-radius:8px;padding:12px;position:relative;}
.dive-log::before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:8px;border-radius:4px;background:repeating-linear-gradient(180deg,var(--brass) 0 4px,transparent 4px 10px);opacity:0.6;}
.log-entry{padding:8px 8px 8px 22px;border-bottom:1px dashed rgba(200,168,88,0.2);font-size:13px;color:#e0d2b0;}
.log-entry:last-child{border-bottom:none;}
.log-coord{display:block;font-family:var(--mono);font-size:10px;color:var(--brass);letter-spacing:0.06em;}
.log-coord::before{content:"⊕ ";color:var(--brass);}
.log-text{color:#e0d2b0;font-family:var(--serif);}
.log-sign{display:block;font-family:var(--hand);font-size:14px;color:#c8a858;}

/* Live indicator */
.live-indicator{display:flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;color:var(--ink-soft);}
.live-dot{width:10px;height:10px;border-radius:50%;background:var(--bio);box-shadow:0 0 10px var(--bio);animation:blink-warning 1.4s step-end infinite;}
.live-count{color:var(--bio-bright);font-weight:700;}

/* ----------------------------- Detail page ----------------------------- */
.page-detail{max-width:1240px;margin:0 auto;padding:28px 24px;}
.detail-breadcrumb{font-family:var(--mono);font-size:12px;color:var(--ink-muted);margin-bottom:18px;}
.detail-breadcrumb a{color:var(--cyan);}
.detail-breadcrumb span{margin:0 6px;color:var(--ink-faint);}
.detail-hero{display:grid;grid-template-columns:340px 1fr;gap:32px;align-items:center;background:rgba(8,20,36,0.6);border:1px solid var(--line);border-radius:18px;padding:32px;box-shadow:var(--shadow-deep);}
@media (max-width:760px){.detail-hero{grid-template-columns:1fr;}}
.detail-porthole{width:300px;height:300px;border-radius:50%;border:8px solid var(--bronze);box-shadow:inset 0 0 24px rgba(0,0,0,0.85),0 0 0 3px var(--bronze-dark),var(--shadow);overflow:hidden;position:relative;justify-self:center;}
.detail-porthole-img{width:100%;height:100%;object-fit:cover;filter:hue-rotate(-20deg) saturate(0.7) brightness(0.8);}
.detail-porthole::after{content:"";position:absolute;inset:0;border-radius:50%;pointer-events:none;background:radial-gradient(circle at 30% 24%, rgba(255,255,255,0.25) 0 28%, transparent 40%);}
.detail-shape{font-family:var(--mono);font-size:11px;letter-spacing:0.12em;color:var(--bio);text-transform:uppercase;}
.detail-title{font-family:var(--mono);font-size:clamp(26px,3.4vw,40px);color:var(--pearl);margin:8px 0 14px;line-height:1.15;text-shadow:0 2px 12px rgba(0,0,0,0.6);}
.detail-stats{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:14px;}
.stat{font-family:var(--mono);font-size:13px;color:var(--ink-soft);background:rgba(0,30,50,0.5);border:1px solid var(--line);padding:8px 12px;border-radius:10px;}
.stat b{color:var(--cyan-bright);font-size:15px;}
.detail-tags{display:flex;gap:6px;flex-wrap:wrap;}
.fossil-tag{font-family:var(--mono);font-size:10px;color:var(--bio);background:rgba(0,40,30,0.5);border:1px solid rgba(126,255,138,0.3);padding:3px 8px;border-radius:999px;}
.detail-body{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:32px;margin-top:36px;}
@media (max-width:980px){.detail-body{grid-template-columns:1fr;}}
.detail-section-head{font-family:var(--mono);font-size:18px;color:var(--cyan-bright);border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:14px;}
.detail-desc{font-family:var(--serif);font-size:17px;color:var(--ink-soft);line-height:1.8;}
.dive-note{margin-top:24px;background:linear-gradient(180deg,#2a2018,#1a1208);border:1px solid var(--brass-dark);border-radius:10px;padding:20px 24px;position:relative;}
.dive-note::before{content:"⊕";position:absolute;top:14px;right:18px;color:var(--brass);font-size:18px;}
.dive-note .diary-coord{display:block;font-family:var(--mono);font-size:11px;color:var(--brass);letter-spacing:0.08em;margin-bottom:8px;}
.dive-note .diary-text{font-family:var(--hand);font-size:18px;color:#e0d2b0;line-height:1.5;}
.dive-note .diary-sign{display:block;font-family:var(--hand);font-size:14px;color:#c8a858;margin-top:10px;}
.detail-related{margin-top:36px;}
.detail-related h3{font-family:var(--mono);font-size:16px;color:var(--cyan-bright);margin-bottom:16px;}

/* ----------------------------- Static pages ----------------------------- */
.page-static{max-width:820px;margin:0 auto;padding:40px 24px;}
.static-head{margin-bottom:24px;}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:0.16em;color:var(--bio);text-transform:uppercase;}
.static-head h1{font-family:var(--mono);font-size:clamp(28px,4vw,40px);color:var(--pearl);margin-top:6px;}
.static-body{font-family:var(--serif);font-size:18px;color:var(--ink-soft);line-height:1.8;}
.static-body h2{font-family:var(--mono);font-size:20px;color:var(--cyan-bright);margin-top:28px;}
.static-lead{font-size:20px;font-style:italic;color:var(--pearl);}
.static-meta{font-family:var(--mono);font-size:13px;color:var(--ink-muted);margin-top:18px;}
.contact-form{display:flex;flex-direction:column;gap:14px;margin-top:20px;}
.contact-form label{font-family:var(--mono);font-size:12px;color:var(--cyan);display:flex;flex-direction:column;gap:6px;}
.contact-form input,.contact-form textarea{font-family:var(--serif);font-size:16px;padding:10px 12px;border-radius:8px;border:1px solid var(--line);background:rgba(0,30,50,0.5);color:var(--ink);}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--cyan-bright);}
.contact-submit{font-family:var(--mono);font-size:13px;letter-spacing:0.1em;background:var(--cyan-bright);color:var(--abyss);border:none;padding:12px 20px;border-radius:8px;cursor:pointer;align-self:flex-start;}

/* ----------------------------- Search page ----------------------------- */
.page-search{max-width:920px;margin:0 auto;padding:40px 24px;}
.search-box{display:flex;flex-direction:column;gap:8px;margin-bottom:24px;}
.search-box input{font-family:var(--serif);font-size:20px;padding:14px 18px;border-radius:12px;border:1px solid var(--line);background:rgba(0,30,50,0.6);color:var(--ink);}
.search-box input:focus{outline:none;border-color:var(--cyan-bright);}
.search-hint{font-family:var(--mono);font-size:11px;color:var(--ink-muted);}
.search-results{display:flex;flex-direction:column;gap:12px;}
.search-empty{font-family:var(--serif);font-style:italic;color:var(--ink-muted);text-align:center;padding:30px;}
.search-result{display:flex;gap:14px;background:rgba(8,20,36,0.6);border:1px solid var(--line-soft);border-radius:12px;padding:12px;color:inherit;}
.search-result:hover{border-color:var(--cyan-bright);text-decoration:none;}
.search-result-thumb{flex:0 0 90px;width:90px;height:64px;background-size:cover;background-position:center;border-radius:8px;border:1px solid var(--line);}
.search-result-body{display:flex;flex-direction:column;gap:4px;}
.search-result-title{font-family:var(--mono);font-size:15px;color:var(--pearl);}
.search-result-meta{font-family:var(--mono);font-size:11px;color:var(--cyan);}
.search-result-desc{font-size:14px;color:var(--ink-soft);}

/* ----------------------------- Footer (seabed ruins) ----------------------------- */
.site-footer{position:relative;z-index:2;background:linear-gradient(180deg,#0a1a2e 0%,#020a10 100%);border-top:1px solid var(--line);padding:48px 0 0;overflow:hidden;}
.sea-snow-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;z-index:0;opacity:0.7;}
.footer-info{position:relative;z-index:2;max-width:1240px;margin:0 auto;padding:0 24px;}
.seabed-ruins{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:36px;}
@media (max-width:820px){.seabed-ruins{grid-template-columns:1fr;}}
.sunken-statue{position:relative;background:rgba(4,12,22,0.5);border:1px solid var(--line-soft);border-radius:12px;padding:16px;overflow:hidden;}
.sunken-statue .statue-img{width:100%;aspect-ratio:3/4;object-fit:cover;filter:grayscale(1) opacity(0.6);border-radius:8px;
  clip-path:polygon(0 0,100% 0,100% 78%,86% 84%,70% 80%,54% 88%,40% 82%,24% 90%,10% 84%,0 88%);}
.sunken-statue .statue-title{position:absolute;bottom:14px;left:0;right:0;text-align:center;font-family:var(--mono);font-size:13px;color:var(--pearl);opacity:0;transition:opacity .4s;padding:0 12px;}
.sunken-statue:hover .statue-img{filter:grayscale(0.5) opacity(0.85);box-shadow:0 0 24px rgba(127,234,255,0.4);}
.sunken-statue:hover .statue-title{opacity:1;}
.column-fragment{background:rgba(4,12,22,0.5);border:1px solid var(--line-soft);border-radius:12px;padding:16px;}
.fragment-body{width:100%;aspect-ratio:3/4;background-size:cover;background-position:center;border-radius:8px;
  filter:sepia(0.4) brightness(0.7);border:1px solid var(--brass-dark);margin-bottom:10px;cursor:grab;}
.fragment-name{font-family:var(--mono);font-size:12px;color:var(--brass);}
.fragment-meta{font-family:var(--serif);font-style:italic;font-size:13px;color:var(--ink-muted);}
.barnacle-stele{position:relative;background:linear-gradient(180deg,#3a3024,#1a1208);border:1px solid var(--brass-dark);border-radius:8px;padding:24px;text-align:center;}
.barnacle-stele::before{content:"";position:absolute;inset:0;border-radius:8px;pointer-events:none;opacity:0.6;
  background:
    radial-gradient(circle at 12% 18%, #e8e0d0 0 3px, transparent 4px),
    radial-gradient(circle at 28% 42%, #e8e0d0 0 2px, transparent 3px),
    radial-gradient(circle at 52% 22%, #e8e0d0 0 3px, transparent 4px),
    radial-gradient(circle at 78% 36%, #e8e0d0 0 2px, transparent 3px),
    radial-gradient(circle at 18% 68%, #e8e0d0 0 2px, transparent 3px),
    radial-gradient(circle at 62% 78%, #e8e0d0 0 3px, transparent 4px),
    radial-gradient(circle at 88% 64%, #e8e0d0 0 2px, transparent 3px);}
.stele-light{position:absolute;top:-8px;left:50%;transform:translateX(-50%);width:40px;height:40px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,244,200,0.6),transparent 70%);animation:blink-warning 2.4s ease-in-out infinite;}
.stele-text{position:relative;font-family:var(--mono);font-size:26px;letter-spacing:0.2em;color:var(--brass);text-shadow:0 1px 4px #000;}
.stele-sub{position:relative;font-family:var(--serif);font-style:italic;font-size:13px;color:#c8a858;margin-top:6px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;margin-bottom:28px;}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr;}}
.footer-col h4{font-family:var(--mono);font-size:12px;letter-spacing:0.12em;color:var(--cyan);text-transform:uppercase;margin:0 0 12px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin:0 0 6px;}
.footer-col a{font-size:14px;color:var(--ink-soft);}
.footer-brand .brand-mark{width:54px;height:40px;margin-bottom:10px;}
.footer-name{font-family:var(--mono);font-size:18px;letter-spacing:0.18em;color:var(--pearl);}
.footer-tag{font-family:var(--serif);font-style:italic;font-size:13px;color:var(--cyan);margin-bottom:14px;}

/* Diving helmet subscription */
.diving-helmet{position:relative;background:rgba(4,12,22,0.5);border:1px solid var(--bronze);border-radius:12px;padding:18px;text-align:center;margin-top:18px;}
.helmet-mask{width:90px;height:90px;margin:0 auto 10px;border-radius:50%;cursor:pointer;position:relative;
  background:radial-gradient(circle,#1a3a5c,#020a10);border:6px solid var(--bronze);box-shadow:inset 0 0 18px rgba(0,0,0,0.8),0 0 0 3px var(--bronze-dark);
  transition:transform .5s;display:flex;align-items:center;justify-content:center;transform-style:preserve-3d;}
.helmet-mask::after{content:"Subscribe to Deep Sea Signals";font-family:var(--mono);font-size:9px;color:var(--cyan-bright);text-align:center;padding:0 8px;}
.diving-helmet.open .helmet-mask{transform:rotateY(180deg);}
.helmet-interior{margin-top:10px;max-height:0;overflow:hidden;transition:max-height .5s;}
.diving-helmet.open .helmet-interior{max-height:300px;}
.diving-helmet.subscribed .helmet-mask{box-shadow:inset 0 0 24px rgba(255,200,80,0.7),0 0 0 3px var(--brass);}
.helmet-form{display:flex;flex-direction:column;gap:8px;padding-top:10px;}
.helmet-input{font-family:var(--serif);font-size:14px;padding:8px 10px;border-radius:6px;border:1px solid var(--line);background:rgba(0,30,50,0.6);color:var(--ink);}
.helmet-button{font-family:var(--mono);font-size:12px;letter-spacing:0.08em;background:var(--brass);color:#1a1208;border:none;padding:9px;border-radius:6px;cursor:pointer;}
.helmet-bubbles{position:absolute;top:-10px;left:50%;transform:translateX(-50%);width:60px;height:40px;pointer-events:none;opacity:0;}
.diving-helmet.subscribed .helmet-bubbles{opacity:1;animation:helmet-bubbles 2s ease-out infinite;}
@keyframes helmet-bubbles{0%{transform:translateX(-50%) translateY(0);opacity:0.8;}100%{transform:translateX(-50%) translateY(-40px);opacity:0;}}

.deep-sea-mirage{position:relative;text-align:center;padding:24px 24px 40px;}
.mirage-text{font-family:var(--serif);font-style:italic;font-size:18px;color:var(--cyan-bright);
  text-shadow:0 0 12px rgba(127,234,255,0.6);animation:mirage-float 7s ease-in-out infinite;}
.mirage-text::after{content:" ·";color:var(--bio);opacity:0.7;}
@keyframes mirage-float{0%,100%{transform:translateY(0);opacity:0.85;}50%{transform:translateY(-4px);opacity:1;}}
.footer-bottom{position:relative;z-index:2;border-top:1px solid var(--line-soft);padding:18px 24px;text-align:center;}
.copyright{font-family:var(--mono);font-size:11px;color:var(--ink-muted);letter-spacing:0.08em;}
.exit-arrow{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border-radius:50%;border:1px solid var(--line);
  background:rgba(10,26,46,0.85);color:var(--cyan-bright);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:30;box-shadow:var(--shadow);transition:all .25s;}
.exit-arrow:hover{border-color:var(--cyan-bright);transform:translateY(-3px);}
.exit-arrow svg{width:18px;height:18px;}