:root{
    --green-900:#0a2c20; --green-800:#0f3d2e; --green-700:#16553f;
    --gold:#b8902f; --gold-soft:#dcb55c; --gold-pale:#efe3c4;
    --parchment:#f6f0e2; --paper:#fffdf7; --card:#fffefb;
    --ink:#23201a; --muted:#73695a; --line:#e4dac3;
    --due:#a8341f; --due-bg:#fbeae5; --paid:#1c7a4d; --paid-bg:#e7f3ec;
    --sans:"Public Sans","Noto Sans Devanagari",system-ui,sans-serif;
    --serif:"Fraunces","Noto Sans Devanagari",Georgia,serif;
    --deva:"Noto Sans Devanagari","Public Sans",sans-serif;
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{
    font-family:var(--sans); color:var(--ink); line-height:1.55;
    background:
      radial-gradient(1200px 600px at 50% -10%, #14503b 0%, var(--green-800) 45%, var(--green-900) 100%);
    min-height:100vh; padding:0 0 60px;
    -webkit-font-smoothing:antialiased;
  }
  .deva{font-family:var(--deva)}

  /* ---------- top crest bar ---------- */
  header.crest{
    text-align:center; color:var(--gold-pale); padding:30px 18px 22px;
  }
  .seal{
    width:60px;height:60px;border-radius:50%;margin:0 auto 14px;
    border:2px solid var(--gold-soft); display:flex;align-items:center;justify-content:center;
    font-family:var(--serif); font-weight:700; font-size:20px; color:var(--gold-soft);
    letter-spacing:1px; background:rgba(0,0,0,.15);
    box-shadow:0 0 0 4px rgba(220,181,92,.12);
  }
  .crest .estd{font-size:11px;letter-spacing:3px;text-transform:uppercase;color:var(--gold-soft);opacity:.8}
  .crest h1{
    font-family:var(--serif); font-weight:600; font-size:clamp(22px,5vw,34px);
    color:#fdfaf0; margin:6px 0 2px; letter-spacing:.3px;
  }
  .crest .hindi-name{font-family:var(--deva);font-size:clamp(13px,3.4vw,17px);color:var(--gold-pale);opacity:.92}
  .rule{width:64px;height:2px;background:var(--gold-soft);margin:14px auto 0;border-radius:2px;opacity:.7}
  .session-pill{
    display:inline-block;margin-top:14px;font-size:12px;letter-spacing:1px;
    padding:5px 14px;border:1px solid rgba(220,181,92,.45);border-radius:999px;
    color:var(--gold-pale);text-transform:uppercase;
  }

  /* ---------- stage ---------- */
  .stage{max-width:540px;margin:8px auto 0;padding:0 16px}
  @media(min-width:760px){ .stage{max-width:720px} }

  .panel{
    background:var(--paper); border-radius:18px; overflow:hidden;
    box-shadow:0 30px 60px -25px rgba(0,0,0,.55), 0 2px 0 rgba(255,255,255,.4) inset;
    border:1px solid rgba(184,144,47,.25);
  }
  .panel-top{height:6px;background:linear-gradient(90deg,var(--gold) 0%,var(--gold-soft) 50%,var(--gold) 100%)}

  /* ---------- login ---------- */
  .login{padding:30px 26px 30px}
  .login h2{font-family:var(--serif);font-weight:600;font-size:24px;color:var(--green-800);margin-bottom:4px}
  .login .sub{font-family:var(--deva);color:var(--muted);font-size:14px;margin-bottom:24px}
  .field{margin-bottom:18px}
  .field label{display:block;font-family:var(--deva);font-weight:600;font-size:13.5px;color:var(--green-800);margin-bottom:7px}
  .field label span{color:var(--muted);font-weight:400}
  .field input{
    width:100%;padding:14px 15px;font-family:var(--sans);font-size:16px;color:var(--ink);
    background:var(--card);border:1.5px solid var(--line);border-radius:11px;transition:.18s;
  }
  .field input:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 4px rgba(184,144,47,.14)}
  .field .hint{font-family:var(--deva);font-size:11.5px;color:var(--muted);margin-top:6px}
  .btn{
    width:100%;padding:15px;font-family:var(--deva);font-weight:700;font-size:16px;
    color:#fff;background:linear-gradient(180deg,var(--green-700),var(--green-800));
    border:none;border-radius:11px;cursor:pointer;letter-spacing:.3px;transition:.18s;
    box-shadow:0 10px 22px -10px rgba(15,61,46,.7);
  }
  .btn:hover{transform:translateY(-1px);box-shadow:0 14px 26px -10px rgba(15,61,46,.75)}
  .btn:active{transform:translateY(0)}
  .btn:disabled{opacity:0.7;cursor:not-allowed;transform:none}
  .err{font-family:var(--deva);color:var(--due);background:var(--due-bg);border:1px solid #efc7bd;
    padding:10px 13px;border-radius:10px;font-size:13.5px;margin-bottom:16px;display:none}

  .demo-note{
    margin-top:22px;padding:13px 15px;border:1px dashed var(--line);border-radius:11px;
    background:#fbf7ec;font-size:12.5px;color:var(--muted);font-family:var(--deva);
  }
  .demo-note b{color:var(--green-800)}
  .demo-note code{font-family:var(--sans);background:#fff;border:1px solid var(--line);padding:1px 6px;border-radius:6px;color:var(--ink)}

  /* ---------- result ---------- */
  .result{display:none;padding:0}
  .id-card{padding:26px 26px 20px;background:linear-gradient(180deg,#fffdf6,#fbf6ea);border-bottom:1px solid var(--line)}
  .id-top{display:flex;align-items:center;gap:16px}
  .avatar{
    width:58px;height:58px;border-radius:14px;flex:none;
    background:linear-gradient(145deg,var(--green-700),var(--green-900));color:var(--gold-pale);
    display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:24px;font-weight:700;
  }
  .id-name{font-family:var(--serif);font-weight:600;font-size:21px;color:var(--green-800);line-height:1.2}
  .id-class{font-family:var(--deva);font-size:13.5px;color:var(--muted);margin-top:2px}
  .id-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px;margin-top:20px}
  .id-grid .it .k{font-family:var(--deva);font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
  .id-grid .it .v{font-family:var(--deva);font-size:14.5px;color:var(--ink);font-weight:600;margin-top:1px}

  .stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line)}
  .stat{background:var(--paper);padding:18px 12px;text-align:center}
  .stat .lab{font-family:var(--deva);font-size:11.5px;color:var(--muted);margin-bottom:5px}
  .stat .num{font-family:var(--serif);font-size:clamp(18px,5vw,24px);font-weight:600}
  .stat.due .num{color:var(--due)} .stat.paid .num{color:var(--paid)} .stat.total .num{color:var(--green-800)}
  .stat .rupee{font-size:.7em;opacity:.7}

  .status-strip{padding:13px 26px;font-family:var(--deva);font-weight:600;font-size:14px;text-align:center}
  .status-strip.has-due{background:var(--due-bg);color:var(--due)}
  .status-strip.clear{background:var(--paid-bg);color:var(--paid)}

  .receipts{padding:22px 18px 8px}
  .receipts h3{font-family:var(--deva);font-size:15px;color:var(--green-800);font-weight:700;margin:0 8px 12px;display:flex;align-items:center;gap:8px}
  .receipts h3:after{content:"";flex:1;height:1px;background:var(--line)}
  .rcpt{border:1px solid var(--line);border-radius:13px;margin-bottom:11px;overflow:hidden;background:var(--card)}
  .rcpt-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 15px;cursor:pointer}
  .rcpt-head:hover{background:#fbf7ec}
  .rcpt-left .rno{font-family:var(--deva);font-weight:700;font-size:14px;color:var(--green-800)}
  .rcpt-left .rdate{font-family:var(--deva);font-size:12px;color:var(--muted);margin-top:1px}
  .rcpt-right{text-align:right}
  .rcpt-right .amt{font-family:var(--serif);font-weight:600;font-size:16px;color:var(--ink)}
  .rcpt-right .due-tag{font-family:var(--deva);font-size:11px;margin-top:1px}
  .due-tag.d{color:var(--due)} .due-tag.c{color:var(--paid)}
  .chev{transition:.2s;color:var(--gold);font-size:13px;margin-left:4px;display:inline-block;}
  .rcpt.open .chev{transform:rotate(180deg)}
  .rcpt-body{display:none;border-top:1px dashed var(--line);padding:14px 15px;background:#fdfbf4}
  .rcpt.open .rcpt-body{display:block}
  .breakup{display:grid;grid-template-columns:1fr auto;gap:7px 14px;font-family:var(--deva);font-size:13px}
  .breakup .h{color:var(--muted)} .breakup .a{text-align:right;color:var(--ink);font-weight:600}
  .breakup .tot{border-top:1px solid var(--line);padding-top:8px;margin-top:4px;font-weight:700;color:var(--green-800)}
  .meta-row{display:flex;justify-content:space-between;font-family:var(--deva);font-size:12px;color:var(--muted);margin-top:12px;padding-top:10px;border-top:1px solid var(--line)}

  /* WhatsApp Share Section */
  .wa-share{padding:15px 18px 25px; border-top:1px dashed var(--line); margin-top:10px;}
  .wa-share h3{font-family:var(--deva);font-size:14px;color:var(--green-800);margin-bottom:12px;text-align:center;}
  .wa-btns{display:flex;gap:10px;}
  .btn-wa{
    flex:1; padding:12px; background:#25D366; color:#fff; border:none; border-radius:11px;
    font-family:var(--deva); font-weight:600; font-size:14px; cursor:pointer;
    display:flex; align-items:center; justify-content:center; gap:6px; transition:.2s;
  }
  .btn-wa:hover{background:#1da851; transform:translateY(-1px);}
  .btn-wa-outline{
    flex:1; padding:12px; background:#fff; color:#25D366; border:1px solid #25D366; border-radius:11px;
    font-family:var(--deva); font-weight:600; font-size:14px; cursor:pointer;
    display:flex; align-items:center; justify-content:center; gap:6px; transition:.2s;
  }
  .btn-wa-outline:hover{background:#f0fbf4;}
  .wa-other{display:none; margin-top:10px; display:flex; gap:8px;} /* hidden by default, toggled via inline JS */
  .wa-other input{
    flex:1; padding:10px 12px; font-family:var(--sans); border:1px solid var(--line); border-radius:8px; font-size:14px;
  }
  .wa-other button{
    padding:10px 15px; background:#25D366; color:white; border:none; border-radius:8px; cursor:pointer; font-family:var(--deva);
  }
  
  .back{display:block;width:100%;text-align:center;padding:15px;font-family:var(--deva);font-weight:600;
    color:var(--green-800);background:none;border:none;border-top:1px solid var(--line);cursor:pointer;font-size:14px}
  .back:hover{background:#fbf7ec}

  /* ---------- footer ---------- */
  footer{text-align:center;margin-top:26px;color:var(--gold-pale);font-family:var(--deva);font-size:12px;opacity:.75;line-height:1.7;padding:0 20px}
  footer .upd{font-family:var(--sans);font-size:11px;opacity:.7}

  /* Notice Bar at Top */
  .notice-bar{
    background:#fff; color:var(--green-900); padding:8px 16px; font-family:var(--deva); font-size:12.5px;
    text-align:center; border-bottom:1px solid var(--gold);
    display:flex; justify-content:center; gap:8px; align-items:center;
  }
  .notice-bar .badge{
    background:var(--gold); color:#fff; font-size:10px; padding:2px 6px; border-radius:4px; font-weight:bold;
  }
  .notice-bar p{margin:0;}

  /* reveal animation */
  .reveal{opacity:0;transform:translateY(14px);animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards}
  .reveal.d1{animation-delay:.05s}.reveal.d2{animation-delay:.13s}.reveal.d3{animation-delay:.22s}
  @keyframes rise{to{opacity:1;transform:none}}