/* =========================================================================
   THEME TOKENS
   All colours & type live here. Edit these to re-skin the whole app.
   ========================================================================= */
:root{
  /* --- Herbarium canvas (the taxonomy map) --- */
  --paper:        #EAEEE1;   /* pale sage paper, cooler than cream on purpose */
  --paper-2:      #E1E7D6;
  --card:         #F6F8F0;
  --ink:          #16241C;   /* dark green-black text */
  --ink-soft:     #45564B;
  --hair:         #C4CFB6;   /* hairline rules */
  --chloro:       #1F7A43;   /* chlorophyll green, the primary */
  --chloro-deep:  #14532B;

  /* --- Chloroplast canvas (the energy flow) --- */
  --void:         #0B1712;   /* near-black thylakoid green */
  --void-2:       #0f2019;
  --lum:          #EAF4EC;   /* luminous text */
  --lum-soft:     #93AE9E;
  --beam-a:       #7CF0AE;   /* the living light beam */
  --beam-b:       #24A85C;

  /* --- Functional loss palette (colour = kind of loss) --- */
  --loss-nonpar:  #7C5CBF;   /* off-spectrum light */
  --loss-absorb:  #4B79C4;   /* reflected / not absorbed */
  --loss-thermal: #E0A73A;   /* heat / thermalisation */
  --loss-quantum: #2FA5A0;   /* photon / quantum cost */
  --loss-carbon:  #90963B;   /* Calvin-cycle conversion */
  --loss-photoresp:#E0713A;  /* photorespiration (wasteful) */
  --loss-resp:    #C24A3E;   /* respiration (burned) */
  --loss-sat:     #D9B23A;   /* light saturation / NPQ */
  --loss-ccm:     #3E9BD6;   /* CO2-concentrating pump cost */

  --spectral: linear-gradient(90deg,#8a2be2 0%,#3a5bd6 22%,#20a4a4 42%,#3fae3f 58%,#e8c33a 74%,#e8853a 88%,#c7443a 100%);

  --shadow: 0 1px 2px rgba(20,40,30,.08), 0 8px 30px rgba(20,40,30,.10);
}

/* =========================================================================
   RESET / BASE
   ========================================================================= */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:"Inter",system-ui,sans-serif; font-size:16px; line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{display:block;max-width:100%}
h1,h2,h3{margin:0;font-family:"Fraunces",Georgia,serif;font-weight:600;line-height:1.05;letter-spacing:-.01em}
.mono{font-family:"Space Mono",ui-monospace,monospace}
.eyebrow{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.18em;text-transform:uppercase}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* =========================================================================
   VIEW SWITCHING  (map view = light ; flow view = dark)
   ========================================================================= */
.view{display:none}
.view.active{display:block}
body.flow-mode{background:var(--void);color:var(--lum)}

/* =========================================================================
   MAP VIEW — herbarium
   ========================================================================= */
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

.masthead{padding:46px 0 22px;border-bottom:1px solid var(--hair);position:relative}
.masthead .eyebrow{color:var(--chloro)}
.masthead h1{font-size:clamp(2.1rem,6vw,4rem);margin:.28em 0 .18em;font-weight:600}
.masthead h1 em{font-style:italic;font-weight:400}
.masthead p.lede{max-width:60ch;color:var(--ink-soft);font-size:1.05rem;margin:0}
.sunbadge {
  position: absolute;
  top: 60px;
  right: 80px;
  width: 222px;
  height: 222px;
  background: url('../../images/logo/descend_of_light_logo.png') center / contain no-repeat;
}

@media(max-width:640px) {
  .sunbadge {
    display: none;
  }
}

.legend{display:flex;flex-wrap:wrap;gap:8px 18px;padding:16px 0 4px;font-size:.82rem;color:var(--ink-soft)}
.legend .k{display:inline-flex;align-items:center;gap:7px}
.legend .swatch{width:13px;height:13px;border-radius:3px;flex:none}
.legend .star{color:var(--chloro);font-weight:700}

/* the tree */
.tree{padding:14px 0 70px}
.node{position:relative}

/* children container + hierarchy connectors.
   Each split gets its OWN colour (--branch is set per grouping node), and the
   rail is painted per-twig so it starts at the split and stops at the last leaf. */
.children{margin-left:12px;position:relative}
.children[hidden]{display:none}

.twig{position:relative;padding:5px 0 5px 26px}
/* vertical rail: each twig paints the segment beside it; stacked they form one line */
.twig:before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--branch,var(--hair))}
/* the LAST child caps the rail at its own connector, so it never overshoots the leaf */
.twig:last-child:before{bottom:auto;height:27px}
/* horizontal connector from the rail to this node */
.twig:after{content:"";position:absolute;left:0;top:27px;width:24px;height:2px;background:var(--branch,var(--hair));border-radius:2px}

/* internal (grouping) node — the whole header toggles its subtree */
.grp{display:flex;align-items:flex-start;gap:8px;padding:7px 6px 7px 0;width:100%;text-align:left;
  border-radius:9px;cursor:pointer;transition:background .14s;-webkit-tap-highlight-color:transparent}
.grp[role="button"]:hover{background:color-mix(in srgb,var(--branch,var(--chloro)) 10%,transparent)}
.grp:focus-visible{outline:2px solid var(--branch,var(--chloro));outline-offset:2px}
.grp .caret{flex:none;width:20px;height:20px;margin-top:4px;border-radius:6px;display:grid;place-items:center;
  font-size:.6rem;color:#fff;background:var(--branch,var(--chloro));transition:transform .2s ease;line-height:1}
.grp[aria-expanded="false"] .caret{transform:rotate(-90deg)}
.grp .disc{flex:none;width:12px;height:12px;border-radius:50%;background:var(--branch,var(--chloro));margin-top:8px;
  box-shadow:0 0 0 4px color-mix(in srgb,var(--branch,var(--chloro)) 18%,transparent)}
.grp .txt h3{font-size:1.14rem}
.grp .txt .meta{font-size:.82rem;color:var(--ink-soft);margin-top:1px}
.grp .txt .meta .rank{font-style:italic}

/* leaf card */
.leaf{
  display:block;width:100%;text-align:left;background:var(--card);border:1px solid var(--hair);
  border-left:4px solid var(--branch,var(--chloro));border-radius:12px;
  padding:13px 15px;margin:0;box-shadow:var(--shadow);transition:transform .16s ease,box-shadow .16s ease;
}
.leaf:hover,.leaf:focus-visible{transform:translateY(-2px);box-shadow:0 4px 10px rgba(20,40,30,.10),0 14px 40px rgba(20,40,30,.14);outline:none}
.leaf:focus-visible{border-color:var(--chloro)}
.leaf .lead{display:flex;gap:13px;align-items:center}
.leaf .thumb{flex:none;width:56px;height:56px;border-radius:10px;overflow:hidden;
  background:radial-gradient(circle at 30% 25%,color-mix(in srgb,var(--branch,var(--chloro)) 16%,var(--paper-2)),var(--paper-2));
  display:grid;place-items:center;position:relative}
.leaf .thumb .ic{font-size:1.9rem;line-height:1}
.leaf .thumb img{width:100%;height:100%;object-fit:cover}
.leaf .name{font-family:"Fraunces",serif;font-weight:600;font-size:1.12rem;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.leaf .rank{font-size:.76rem;color:var(--ink-soft);font-style:italic}
.leaf .mixo{font-size:.66rem;font-family:"Space Mono",monospace;letter-spacing:.06em;background:color-mix(in srgb,var(--chloro) 14%,transparent);color:var(--chloro-deep);padding:1px 7px;border-radius:20px}
.leaf .species{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.leaf .sp{font-size:.78rem;background:var(--paper-2);border:1px solid var(--hair);border-radius:20px;padding:2px 10px;color:var(--ink)}
.leaf .sp i{font-style:italic;color:var(--ink-soft)}
.leaf .cta{display:inline-flex;align-items:center;gap:6px;margin-top:11px;font-family:"Space Mono",monospace;
  font-size:.78rem;color:var(--chloro-deep);font-weight:700}
.leaf .cta .max{background:var(--chloro);color:#fff;border-radius:6px;padding:1px 7px;font-weight:700}
.leaf.dark-cta .cta{color:var(--ink-soft)}
.leaf .arrow{transition:transform .16s ease}
.leaf:hover .arrow{transform:translateX(3px)}

/* =========================================================================
   FLOW VIEW — the descent of light
   ========================================================================= */
.flow-top{position:sticky;top:0;z-index:20;background:linear-gradient(var(--void),color-mix(in srgb,var(--void) 88%,transparent));
  backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,.07)}
.flow-top .wrap{display:flex;align-items:center;gap:16px;padding:14px 20px}
.back{display:inline-flex;align-items:center;gap:8px;font-family:"Space Mono",monospace;font-size:.8rem;
  color:var(--lum-soft);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:6px 13px}
.back:hover{color:var(--lum);border-color:rgba(255,255,255,.3)}
.flow-title{flex:1}
.flow-title .eyebrow{color:var(--beam-a)}
.flow-title h2{font-size:clamp(1.4rem,4vw,2rem);color:var(--lum);font-weight:600}
.flow-max{text-align:right;flex:none}
.flow-max .big{font-family:"Space Mono",monospace;font-size:clamp(1.5rem,5vw,2.4rem);font-weight:700;
  background:linear-gradient(90deg,var(--beam-a),var(--beam-b));-webkit-background-clip:text;background-clip:text;color:transparent}
.flow-max .lbl{font-size:.66rem;color:var(--lum-soft);font-family:"Space Mono",monospace;letter-spacing:.1em;text-transform:uppercase}

.flow-body{max-width:940px;margin:0 auto;padding:8px 20px 90px}
.flow-intro{color:var(--lum-soft);max-width:64ch;margin:20px 0 6px;font-size:1.02rem}
.flow-intro b{color:var(--lum)}

/* the cascade */
.cascade{margin:26px 0}
.stage{position:relative;display:grid;grid-template-columns:124px 1fr;gap:0 18px;align-items:stretch;min-height:92px}
.beamcol{position:relative;display:flex;justify-content:center}
.beam{width:100%;max-width:100%;background:linear-gradient(180deg,var(--beam-a),var(--beam-b));
  border-radius:3px;position:relative;box-shadow:0 0 22px color-mix(in srgb,var(--beam-a) 45%,transparent);
  transition:width .5s cubic-bezier(.4,0,.2,1)}
.stage:first-child .beam{border-radius:8px 8px 3px 3px}
/* remaining-energy % — pinned to the column gutter beside the beam, in a
   light colour so it stays legible however narrow the green box gets */
.beamcol .pct{position:absolute;right:2px;top:6px;font-family:"Space Mono",monospace;
  font-size:.72rem;font-weight:700;color:var(--lum);white-space:nowrap;letter-spacing:-.02em;
  text-shadow:0 1px 2px var(--void),0 0 3px var(--void),0 0 4px var(--void)}
.entered{grid-column:1 / -1;display:flex;justify-content:center;margin-bottom:2px}
.entered .chip{font-family:"Space Mono",monospace;font-size:.72rem;color:#06210f;background:linear-gradient(90deg,var(--beam-a),var(--beam-b));
  padding:4px 12px;border-radius:20px;font-weight:700}

.loss{align-self:center}
.loss-card{width:100%;text-align:left;display:flex;gap:12px;align-items:flex-start;
  background:rgba(255,255,255,.035);border:1px solid rgba(255,255,255,.08);
  border-left:4px solid var(--c,#888);border-radius:12px;padding:11px 14px;transition:background .15s,transform .15s}
.loss-card:hover,.loss-card:focus-visible{background:rgba(255,255,255,.075);transform:translateX(3px);outline:none}
.loss-card .drop{flex:none;font-family:"Space Mono",monospace;font-weight:700;color:var(--c);font-size:1.02rem;min-width:56px}
.loss-card .txt .h{font-family:"Fraunces",serif;font-weight:600;color:var(--lum);font-size:1.04rem;display:flex;align-items:center;gap:8px}
.loss-card .txt .s{color:var(--lum-soft);font-size:.88rem;margin-top:2px}
.loss-card .more{font-family:"Space Mono",monospace;font-size:.68rem;color:var(--c);margin-top:6px;opacity:.9}
.loss-card .cat{font-size:.6rem;font-family:"Space Mono",monospace;letter-spacing:.08em;text-transform:uppercase;
  color:var(--c);border:1px solid var(--c);border-radius:20px;padding:0 7px}

.final{margin-top:8px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  background:rgba(124,240,174,.08);border:1px solid rgba(124,240,174,.22);border-radius:14px;padding:16px 18px}
.final .num{font-family:"Space Mono",monospace;font-size:2.2rem;font-weight:700;color:var(--beam-a)}
.final .t h3{color:var(--lum);font-size:1.1rem}
.final .t p{margin:2px 0 0;color:var(--lum-soft);font-size:.9rem;max-width:52ch}

.shared{margin-top:34px;border-top:1px solid rgba(255,255,255,.09);padding-top:22px}
.shared h3{color:var(--lum);font-size:1.15rem;margin-bottom:4px}
.shared p{color:var(--lum-soft);max-width:66ch;font-size:.95rem}
.shared .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.shared .tag{font-size:.78rem;font-family:"Space Mono",monospace;color:var(--lum);
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:4px 11px}

/* chemo / non-light info panel */
.chemo-panel{max-width:720px;margin:30px auto;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);
  border-radius:16px;padding:26px}
.chemo-panel h3{color:var(--lum);font-size:1.3rem;margin-bottom:8px}
.chemo-panel p{color:var(--lum-soft)}
.chemo-panel .donors{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:18px}
.chemo-panel .donor{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09);border-radius:12px;padding:13px}
.chemo-panel .donor h4{margin:0 0 3px;font-family:"Fraunces",serif;color:var(--lum);font-size:1rem}
.chemo-panel .donor p{font-size:.84rem;margin:0}
.chemo-panel .donor .rx{font-family:"Space Mono",monospace;font-size:.76rem;color:var(--beam-a);margin-top:6px}

/* =========================================================================
   DRAWER (loss detail)
   ========================================================================= */
.scrim{position:fixed;inset:0;background:rgba(4,10,7,.5);backdrop-filter:blur(2px);opacity:0;pointer-events:none;
  transition:opacity .25s;z-index:40}
.scrim.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;height:100%;width:min(460px,92vw);background:var(--void-2);
  border-left:1px solid rgba(255,255,255,.12);z-index:50;transform:translateX(100%);transition:transform .3s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;color:var(--lum)}
.drawer.open{transform:none}
.drawer .dhead{padding:22px 24px 14px;border-bottom:1px solid rgba(255,255,255,.09);position:sticky;top:0;background:var(--void-2)}
.drawer .cat{font-size:.62rem;font-family:"Space Mono",monospace;letter-spacing:.1em;text-transform:uppercase;
  color:var(--c);border:1px solid var(--c);border-radius:20px;padding:1px 9px}
.drawer h3{font-family:"Fraunces",serif;color:var(--lum);font-size:1.5rem;margin:12px 0 6px}
.drawer .dnums{display:flex;gap:20px;margin-top:8px;font-family:"Space Mono",monospace;font-size:.8rem}
.drawer .dnums b{color:var(--c);font-size:1.1rem}
.drawer .dnums span{color:var(--lum-soft);display:block;font-size:.64rem;letter-spacing:.08em;text-transform:uppercase}
.drawer .dbody{padding:20px 24px 40px}
.drawer .dbody p{color:#cddccf;font-size:.96rem;line-height:1.62}
.drawer .concept{margin:16px 0;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.1);background:#0a140f}
.drawer .concept img{width:100%;height:auto;max-height:240px;object-fit:cover}
.drawer .concept .cap{font-size:.72rem;color:var(--lum-soft);padding:8px 12px;background:rgba(255,255,255,.03)}
.drawer .links{margin-top:20px;display:flex;flex-direction:column;gap:8px}
.drawer .links a{display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:11px 14px;
  font-size:.9rem;text-decoration:none;transition:background .15s}
.drawer .links a:hover{background:rgba(255,255,255,.1)}
.drawer .links a .w{font-family:"Space Mono",monospace;font-size:.66rem;color:var(--lum-soft)}
.dclose{position:absolute;top:18px;right:18px;width:34px;height:34px;border-radius:50%;
  background:rgba(255,255,255,.08);color:var(--lum);font-size:1.1rem;line-height:1}
.dclose:hover{background:rgba(255,255,255,.16)}

/* mixotroph asterisk on map species chips */
.leaf .sp .sp-star{color:var(--chloro-deep);font-weight:700}

/* =========================================================================
   SPECIES PANEL  (per-group roster on the flow page, dark canvas)
   ========================================================================= */
.species-panel{margin-top:34px;border-top:1px solid rgba(255,255,255,.09);padding-top:22px}
.species-panel h3{color:var(--lum);font-size:1.15rem;margin-bottom:4px}
.species-panel .sp-lead{color:var(--lum-soft);font-size:.92rem;max-width:66ch;margin:0 0 14px}
.species-panel .sp-mixo{color:var(--beam-a);font-weight:700}
.sp-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.sp-card{display:flex;align-items:center;justify-content:space-between;gap:10px;text-decoration:none;
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-left:3px solid var(--beam-b);
  border-radius:11px;padding:11px 13px;transition:background .15s,transform .15s,border-color .15s}
.sp-card:hover,.sp-card:focus-visible{background:rgba(255,255,255,.08);transform:translateY(-1px);
  border-left-color:var(--beam-a);outline:none}
.sp-card .sp-txt{display:flex;flex-direction:column;gap:1px;min-width:0}
.sp-card .sp-n{font-family:"Fraunces",serif;font-weight:600;color:var(--lum);font-size:1rem;line-height:1.2}
.sp-card .sp-s{color:var(--lum-soft);font-size:.82rem}
.sp-card .sp-s i{font-style:italic}
.sp-card .sp-w{flex:none;font-family:"Space Mono",monospace;font-size:.62rem;color:var(--lum-soft);white-space:nowrap}

/* utility footer */
.foot{border-top:1px solid var(--hair);color:var(--ink-soft);font-size:.8rem;padding:22px 0 40px}
body.flow-mode .foot{border-color:rgba(255,255,255,.08);color:var(--lum-soft)}
.foot a{color:var(--chloro-deep);font-weight:600}
body.flow-mode .foot a{color:var(--beam-a)}

@media(max-width:620px){
  .stage{grid-template-columns:70px 1fr;gap:0 12px;min-height:84px}
  .flow-top .wrap{flex-wrap:wrap;gap:10px}
  .loss-card{flex-direction:column;gap:4px}
  .loss-card .drop{min-width:0}
  .children{margin-left:7px}
  .twig{padding-left:20px}
  .twig:after{width:18px}
  .leaf .thumb{width:44px;height:44px}
  .leaf .thumb .ic{font-size:1.55rem}
  .masthead{padding:32px 0 18px}
  .sp-grid{grid-template-columns:1fr}
}