/* ============================================================
   AHUJA FAMILY TREE — warm, traditional, glowing-dark system
   Fonts: system stack (swap in Marcellus/Mukta on production).
   ============================================================ */
:root{
  /* warm dark ground */
  --bg-0:#140b05;
  --bg-1:#1a1008;
  --bg-2:#241509;

  /* generation ramp (terracotta → warm clay) */
  --gen0:#b5451b;  /* root couple */
  --gen1:#c4674a;
  --gen2:#d4856d;
  --gen3:#e4a98f;
  --spouse:#c9973a; /* married-in gold */
  --gold:#c9973a;
  --gold-soft:#e0bd78;

  /* text */
  --ink:#f4e9da;
  --ink-soft:#d8c6ad;
  --ink-mute:#9c8569;
  --line:rgba(201,151,58,.22);

  --serif:'Hoefler Text', 'Iowan Old Style', Georgia, 'Times New Roman', serif;
  --sans:'Avenir Next', 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* glow ground stops — overridden per theme by ahuja-themes.js */
  --ground-1:#3a1f0d;
  --ground-2:#24140a;

  --panel-w: 396px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{ box-sizing:border-box; }
html,body{ height:100%; margin:0; }
body{
  background:var(--bg-1);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
button{ font-family:inherit; cursor:pointer; }

/* radial warm glow ground */
.ground{
  position:fixed; inset:0;
  background:
    radial-gradient(120% 120% at 50% 46%, var(--ground-1) 0%, var(--ground-2) 38%, var(--bg-0) 78%),
    var(--bg-0);
  transition:background .6s var(--ease);
}
.ground::after{ /* faint vignette */
  content:""; position:absolute; inset:0;
  background:radial-gradient(120% 120% at 50% 50%, transparent 55%, rgba(0,0,0,.55) 100%);
  pointer-events:none;
}

/* ============================ APP ============================ */
#app{ position:fixed; inset:0; opacity:0; transition:opacity .9s var(--ease); }
#app.ready{ opacity:1; }

.topbar{
  position:fixed; top:0; left:0; right:0; z-index:30;
  display:flex; align-items:center; gap:14px;
  padding:18px 22px;
  pointer-events:none;
}
.topbar .brand{ display:flex; align-items:center; gap:12px; pointer-events:auto; }
.brand-mark{ width:34px; height:34px; flex:0 0 auto; }
.brand-text{ line-height:1; }
.brand-text .name{ font-family:var(--serif); font-size:19px; letter-spacing:.14em; color:var(--ink); }
.brand-text .sub{ font-size:10.5px; letter-spacing:.34em; text-transform:uppercase; color:var(--ink-mute); margin-top:3px; }

.toolbar{ margin-left:auto; display:flex; gap:8px; pointer-events:auto; }
.tool{
  display:inline-flex; align-items:center; gap:7px;
  background:rgba(36,21,9,.55); border:1px solid var(--line);
  color:var(--ink-soft); font-size:12.5px; letter-spacing:.02em;
  padding:8px 13px; border-radius:999px; backdrop-filter:blur(6px);
  transition:.25s var(--ease);
}
.tool:hover{ color:var(--ink); border-color:rgba(201,151,58,.5); background:rgba(48,28,12,.7); }
.tool.on{ color:#1a1008; background:var(--gold); border-color:var(--gold); }
.tool .dot{ width:7px;height:7px;border-radius:50%; background:currentColor; opacity:.7; }

/* theme palette switcher */
.themes{ display:flex; align-items:center; gap:7px; pointer-events:auto;
  background:rgba(36,21,9,.55); border:1px solid var(--line); border-radius:999px;
  padding:6px 10px; backdrop-filter:blur(6px); }
.theme-sw{ width:20px; height:20px; border-radius:50%; padding:0; cursor:pointer;
  border:1px solid rgba(255,255,255,.18); transition:transform .2s var(--ease), box-shadow .2s var(--ease); }
.theme-sw:hover{ transform:scale(1.12); }
.theme-sw.on{ box-shadow:0 0 0 2px var(--bg-1), 0 0 0 3px var(--gold); }

/* chart stage */
#stage{ position:absolute; inset:0; display:grid; place-items:center; }
#chart{ width:min(94vmin, 980px); height:min(94vmin,980px); max-width:100%; cursor:grab; touch-action:none; overflow:visible; }
body.view-tree #chart{ width:min(96vw, 1680px); height:min(74vh, 880px); max-width:none; }
#chart:active{ cursor:grabbing; }
#chart text{ font-family:var(--serif); fill:var(--ink); user-select:none; }

/* zoom / pan controls */
.zoom-controls{
  position:fixed; right:18px; bottom:20px; z-index:25;
  display:flex; flex-direction:column; gap:8px;
}
.zbtn{
  width:44px; height:44px; border-radius:13px;
  background:rgba(36,21,9,.6); border:1px solid var(--line);
  color:var(--ink-soft); font-size:21px; line-height:1;
  display:grid; place-items:center; backdrop-filter:blur(6px);
  transition:.2s var(--ease);
}
.zbtn:hover{ color:var(--ink); border-color:rgba(201,151,58,.5); background:rgba(48,28,12,.72); }
.zbtn:active{ transform:scale(.94); }
.zbtn.zreset{ font-size:17px; }

/* view toggle (sunburst / tree) */
.viewtoggle{ display:flex; align-items:center; gap:2px; pointer-events:auto;
  background:rgba(36,21,9,.55); border:1px solid var(--line); border-radius:999px;
  padding:4px; backdrop-filter:blur(6px); }
.vt-btn{ display:inline-flex; align-items:center; gap:7px; border:none; background:transparent;
  color:var(--ink-soft); font-size:12.5px; letter-spacing:.02em; padding:6px 13px; border-radius:999px;
  transition:.22s var(--ease); }
.vt-btn svg{ width:15px; height:15px; display:block; }
.vt-btn:hover{ color:var(--ink); }
.vt-btn.on{ background:var(--gold); color:#1a1008; box-shadow:0 4px 14px rgba(201,151,58,.28); }

/* ===================== TRADITIONAL TREE VIEW ===================== */
#stage{ transition:opacity .3s var(--ease); }

.tree-links .tlink{
  fill:none; stroke:var(--gold); stroke-opacity:.42; stroke-width:1.5;
  stroke-linecap:round;
  transition:opacity .35s var(--ease), stroke-opacity .35s var(--ease);
}
.tree-links .tlink.dim{ opacity:.1; }

.couple .marr-bar{ stroke:var(--gold); stroke-width:2.4; stroke-opacity:.75; stroke-linecap:round; pointer-events:none; }
.couple .marr-knot{ fill:var(--gold); pointer-events:none; }

.tree-nodes .seg{ transition:opacity .35s var(--ease); }
.tree-nodes .seg.dim{ opacity:.13; }
.tree-nodes .ava-bg{ stroke:rgba(255,255,255,.14); stroke-width:1; }
.tree-nodes .ava-ring{ stroke:var(--gold); stroke-width:1.6; stroke-opacity:.5;
  transition:stroke-opacity .2s var(--ease), stroke-width .2s var(--ease); }
.tree-nodes .seg:hover .ava-ring{ stroke-opacity:1; stroke-width:2.4; }
.tree-nodes .ava-init{ font-family:var(--serif); text-anchor:middle; dominant-baseline:central; }
.tree-nodes .node-name{ font-family:var(--sans); fill:var(--ink); font-size:13.5px;
  letter-spacing:.015em; dominant-baseline:hanging; }
.tree-nodes .deceased .ava{ opacity:.64; }
.tree-nodes .deceased .node-name{ fill:var(--ink-soft); }
.tree-nodes .dmark{ fill:var(--gold); text-anchor:middle; dominant-baseline:central; }

/* segment styling driven in JS, but base transitions here */
.seg path{ transition:opacity .35s var(--ease), filter .35s var(--ease); cursor:pointer; }
.seg.dim{ opacity:.16; }
.seg.dim text{ opacity:.12; }
.couple-outline{ fill:none; stroke:var(--ink-soft); pointer-events:none; }
.couple-divider{ stroke:var(--bg-0); pointer-events:none; }
.knot{ fill:var(--gold); stroke:var(--bg-0); stroke-width:1.2; pointer-events:none; }
.seg .lbl{ pointer-events:none; }
.center-couple text{ text-anchor:middle; }

/* hint chip bottom */
.hint{
  position:fixed; left:50%; bottom:22px; transform:translateX(-50%);
  font-size:12px; letter-spacing:.04em; color:var(--ink-mute);
  display:flex; align-items:center; gap:10px; z-index:20;
  background:rgba(20,11,5,.5); padding:7px 15px; border-radius:999px;
  border:1px solid rgba(201,151,58,.14); backdrop-filter:blur(5px);
  transition:opacity .4s; pointer-events:none;
}
.legend{ display:flex; gap:14px; }
.legend i{ display:inline-flex; align-items:center; gap:6px; font-style:normal; }
.legend .sw{ width:11px;height:11px;border-radius:3px; display:inline-block; }

/* tooltip */
.tip{
  position:fixed; z-index:40; pointer-events:none; opacity:0;
  transform:translate(-50%,-128%); transition:opacity .15s;
  background:rgba(26,16,8,.96); border:1px solid var(--line);
  color:var(--ink); font-family:var(--serif); font-size:14px;
  padding:6px 12px; border-radius:8px; white-space:nowrap;
  box-shadow:0 10px 30px rgba(0,0,0,.5);
}
.tip .yrs{ font-family:var(--sans); font-size:11px; color:var(--ink-mute); margin-left:8px; }

/* ====================== SIDE PANEL ====================== */
#panel{
  position:fixed; top:0; right:0; height:100%; width:var(--panel-w); max-width:92vw;
  background:linear-gradient(180deg,#1d1209,#150d06);
  border-left:1px solid var(--line); z-index:50;
  transform:translateX(105%); transition:transform .5s var(--ease);
  box-shadow:-30px 0 80px rgba(0,0,0,.55);
  display:flex; flex-direction:column;
}
#panel.open{ transform:none; }
.panel-close{
  position:absolute; top:16px; right:16px; z-index:2;
  width:34px;height:34px; border-radius:50%;
  background:rgba(244,233,218,.06); border:1px solid var(--line);
  color:var(--ink-soft); font-size:17px; line-height:1; display:grid; place-items:center;
}
.panel-close:hover{ background:rgba(244,233,218,.12); color:var(--ink); }

.panel-scroll{ overflow-y:auto; height:100%; }
.panel-scroll::-webkit-scrollbar{ width:8px; }
.panel-scroll::-webkit-scrollbar-thumb{ background:rgba(201,151,58,.25); border-radius:8px; }

.panel-head{ padding:40px 30px 26px; text-align:center; position:relative; }
.panel-head .gen-tag{
  font-family:var(--sans); font-size:10.5px; letter-spacing:.28em; text-transform:uppercase;
  color:var(--gold-soft); margin-bottom:18px;
}
.avatar{
  width:124px; height:124px; border-radius:50%; margin:0 auto 18px;
  display:grid; place-items:center; position:relative;
  font-family:var(--serif); font-size:42px; color:#1a1008;
  box-shadow:0 14px 40px rgba(0,0,0,.5), inset 0 0 0 1px rgba(255,255,255,.12);
}
.avatar .ring{ position:absolute; inset:-7px; border-radius:50%; border:1px solid var(--line); }
.panel-head h2{ font-family:var(--serif); font-weight:400; font-size:27px; margin:0 0 5px; letter-spacing:.01em; }
.panel-head .nick{ font-size:13px; color:var(--ink-mute); }
.panel-head .dates{ font-family:var(--sans); font-size:13.5px; color:var(--ink-soft); margin-top:10px; }
.panel-head .place{ font-size:12.5px; color:var(--ink-mute); margin-top:3px; }
.deceased-mark{ display:inline-block; margin-right:6px; color:var(--gold); }

.panel-body{ padding:6px 26px 40px; }
.section{ margin-top:26px; }
.section h3{
  font-family:var(--sans); font-size:11px; font-weight:600; letter-spacing:.22em; text-transform:uppercase;
  color:var(--ink-mute); margin:0 0 12px; padding-bottom:9px; border-bottom:1px solid var(--line);
}
.section p.bio{ font-size:14px; line-height:1.65; color:var(--ink-soft); margin:0; text-wrap:pretty; }

.rel{
  display:flex; align-items:center; gap:12px; width:100%;
  background:rgba(244,233,218,.035); border:1px solid transparent;
  border-radius:12px; padding:10px 12px; margin-bottom:8px; text-align:left;
  color:var(--ink); transition:.2s var(--ease);
}
.rel:hover{ background:rgba(201,151,58,.1); border-color:var(--line); transform:translateX(2px); }
.rel .ava{ width:38px;height:38px;border-radius:50%; flex:0 0 auto; display:grid; place-items:center;
  font-family:var(--serif); font-size:15px; color:#1a1008; }
.rel .meta{ line-height:1.25; }
.rel .meta .rn{ font-family:var(--serif); font-size:15.5px; }
.rel .meta .ry{ font-family:var(--sans); font-size:11.5px; color:var(--ink-mute); }
.rel .role{ margin-left:auto; font-size:10px; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-mute); }
.rel-grid{ display:flex; flex-direction:column; }

/* ====================== LOCK SCREEN ====================== */
#lock{
  position:fixed; inset:0; z-index:100; display:grid; place-items:center;
  background:radial-gradient(120% 120% at 50% 42%, var(--ground-1) 0%, var(--ground-2) 40%, var(--bg-0) 80%), var(--bg-0);
  transition:opacity .8s var(--ease), visibility .8s;
}
#lock.hidden{ opacity:0; visibility:hidden; }
.lock-card{ width:min(380px,90vw); text-align:center; padding:0 24px; }
.lock-mark{ width:96px; height:96px; margin:0 auto 30px; }
.lock-title{ font-family:var(--serif); font-size:34px; letter-spacing:.16em; margin:0; }
.lock-sub{ font-size:11.5px; letter-spacing:.36em; text-transform:uppercase; color:var(--ink-mute); margin:10px 0 38px; }
.lock-form{ position:relative; }
.lock-input{
  width:100%; background:rgba(244,233,218,.05); border:1px solid var(--line);
  border-radius:14px; padding:16px 54px 16px 18px; color:var(--ink);
  font-family:var(--serif); font-size:17px; letter-spacing:.06em; text-align:center;
  outline:none; transition:.25s var(--ease);
}
.lock-input::placeholder{ color:var(--ink-mute); letter-spacing:.2em; font-size:13px; }
.lock-input:focus{ border-color:rgba(201,151,58,.6); background:rgba(244,233,218,.08); box-shadow:0 0 0 4px rgba(201,151,58,.08); }
.lock-go{
  position:absolute; right:7px; top:50%; transform:translateY(-50%);
  width:42px;height:42px; border-radius:10px; border:none;
  background:var(--gold); color:#1a1008; font-size:18px; display:grid; place-items:center;
  transition:.2s var(--ease);
}
.lock-go:hover{ background:var(--gold-soft); }
.lock-msg{ height:18px; margin-top:16px; font-size:12px; letter-spacing:.04em; color:#e0846a; opacity:0; transition:.2s; }
.lock-msg.show{ opacity:1; }
.lock-hint{ margin-top:30px; font-size:11px; color:var(--ink-mute); letter-spacing:.05em; }
.shake{ animation:shake .42s var(--ease); }
@keyframes shake{ 10%,90%{transform:translateX(-2px)} 30%,70%{transform:translateX(5px)} 50%{transform:translateX(-7px)} }

/* ====================== RESPONSIVE ====================== */
@media (max-width:720px){
  .brand-text .sub{ display:none; }
  .topbar{ padding:14px 16px; }
  .tool span.t{ display:none; }
  .vt-btn span.t{ display:none; }
  #panel{ width:100%; max-width:100%; height:74%; top:auto; bottom:0; border-left:none;
    border-top:1px solid var(--line); border-radius:22px 22px 0 0; transform:translateY(105%); }
  #panel.open{ transform:none; }
  .panel-head{ padding-top:30px; }
  .hint .legend{ display:none; }
  #chart{ width:96vmin; height:96vmin; }
  body.view-tree #chart{ width:100vw; height:70vh; }
}
@media (prefers-reduced-motion: reduce){
  *{ transition-duration:.001ms !important; animation-duration:.001ms !important; }
}