:root{
  --bg:#03060b;
  --ink:#e8f6ff;
  --muted:#7f97a9;
  --cyan:#00f0ff;
  --purple:#a855f7;
  --card:rgba(255,255,255,.045);
  --line:rgba(0,240,255,.16);
  --line-soft:rgba(255,255,255,.09);
  --good:#22e39a;
  --warn:#ffcf5c;
  --bad:#ff6b7d;
  --radius:16px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;
  background:var(--bg);color:var(--ink);
  font-family:"Inter",system-ui,sans-serif;
  font-size:16px;line-height:1.55;
  position:relative;overflow-x:hidden;
}

/* Ambient frosted glow behind everything */
.aurora{
  position:fixed;inset:-20% -10% auto -10%;height:60vh;z-index:-1;
  background:
    radial-gradient(40% 60% at 20% 0%,rgba(0,240,255,.16),transparent 70%),
    radial-gradient(45% 55% at 85% 10%,rgba(168,85,247,.16),transparent 70%);
  filter:blur(30px);pointer-events:none;
}

/* ---- Top bar ---- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(16px,4vw,40px);
  border-bottom:1px solid var(--line-soft);
}
.brand{display:flex;align-items:baseline;gap:8px;text-decoration:none}
.brand-mark{
  font-family:"Sora",sans-serif;font-weight:800;letter-spacing:.14em;
  font-size:19px;color:var(--cyan);text-shadow:0 0 18px rgba(0,240,255,.55);
}
.brand-sub{color:var(--muted);font-weight:600;font-size:13px;letter-spacing:.08em}
.nav{display:flex;align-items:center;gap:22px}
.nav a{color:var(--muted);text-decoration:none;font-weight:500;font-size:14px;transition:color .15s}
.nav a:hover{color:var(--ink)}
.nav-logout{color:var(--muted)}

/* Hamburger button — hidden on desktop, shown in the mobile media query */
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* ---- Layout ---- */
.wrap{max-width:860px;margin:0 auto;padding:clamp(24px,5vw,48px) clamp(16px,4vw,24px)}
.wrap-narrow{max-width:440px}
h1{font-family:"Sora",sans-serif;font-weight:800;font-size:clamp(24px,4vw,32px);margin:0 0 6px}
h2{font-family:"Sora",sans-serif;font-weight:600;font-size:19px;margin:0 0 14px}
.lead{color:var(--muted);margin:0 0 28px}
.page-head{margin-bottom:28px}

/* ---- Cards ---- */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 1px 0 rgba(255,255,255,.04) inset,0 20px 40px -30px rgba(0,240,255,.4);
}
.card + .card{margin-top:18px}
.card-glow{border-color:rgba(0,240,255,.3)}

.stat{
  display:flex;flex-wrap:wrap;gap:24px;align-items:flex-end;
  padding:26px;margin-bottom:26px;
}
.stat .amount{
  font-family:"Sora",sans-serif;font-weight:800;font-size:40px;line-height:1;
  background:linear-gradient(135deg,var(--cyan),var(--purple));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 20px rgba(0,240,255,.3));
}
.stat .amount.zero{background:none;color:var(--good);-webkit-text-fill-color:var(--good)}
.stat .label{color:var(--muted);font-size:13px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px}

/* ---- Bill rows ---- */
.bill{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:16px 0;border-top:1px solid var(--line-soft);
}
.bill:first-child{border-top:0}
.bill-main{flex:1;min-width:180px}
.bill-desc{font-weight:600}
.bill-meta{color:var(--muted);font-size:13px;margin-top:2px}
.bill-amt{font-family:"Sora",sans-serif;font-weight:600;font-size:18px}

/* ---- Badges ---- */
.badge{
  display:inline-block;font-size:11px;font-weight:600;letter-spacing:.05em;
  text-transform:uppercase;padding:3px 9px;border-radius:999px;border:1px solid;
}
.badge-unpaid{color:var(--warn);border-color:rgba(255,207,92,.4);background:rgba(255,207,92,.08)}
.badge-paid{color:var(--good);border-color:rgba(34,227,154,.4);background:rgba(34,227,154,.08)}
.badge-void{color:var(--muted);border-color:var(--line-soft)}
.badge-pending{color:var(--cyan);border-color:var(--line)}
.badge-active{color:var(--good);border-color:rgba(34,227,154,.4)}
.badge-admin{color:var(--purple);border-color:rgba(168,85,247,.45);background:rgba(168,85,247,.1)}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:"Sora",sans-serif;font-weight:700;font-size:15px;
  padding:12px 22px;border-radius:11px;border:0;cursor:pointer;
  text-decoration:none;transition:transform .12s,box-shadow .2s;
}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),var(--purple));color:#02040a;
  box-shadow:0 0 24px -6px rgba(0,240,255,.6);
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 30px -4px rgba(0,240,255,.8)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--cyan)}
.btn-sm{padding:8px 16px;font-size:13px;border-radius:9px}
.btn-danger{background:transparent;border:1px solid rgba(255,107,125,.4);color:var(--bad)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-block{width:100%}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}

/* ---- Forms ---- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:500}
.input,select.input{
  width:100%;padding:12px 14px;font-size:15px;color:var(--ink);
  background:rgba(0,0,0,.35);border:1px solid var(--line-soft);border-radius:10px;
  transition:border-color .15s,box-shadow .15s;font-family:inherit;
}
.input:focus{outline:0;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(0,240,255,.14)}
.input-group{display:flex;gap:12px;flex-wrap:wrap}
.input-group .field{flex:1;min-width:140px;margin-bottom:0}
.hint{font-size:12px;color:var(--muted);margin-top:6px}
.prefix-wrap{position:relative}
.prefix-wrap .prefix{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted)}
.prefix-wrap .input{padding-left:26px}

/* ---- Flash / alerts ---- */
.flash{
  padding:13px 16px;border-radius:11px;margin-bottom:18px;font-size:14px;font-weight:500;
  border:1px solid;
}
.flash-success{background:rgba(34,227,154,.1);border-color:rgba(34,227,154,.4);color:var(--good)}
.flash-error{background:rgba(255,107,125,.1);border-color:rgba(255,107,125,.4);color:var(--bad)}
.flash-info{background:rgba(0,240,255,.08);border-color:var(--line);color:var(--cyan)}

/* ---- Tables (admin) ---- */
.table{width:100%;border-collapse:collapse}
.table th{text-align:left;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.05em;padding:0 12px 12px;font-weight:600}
.table td{padding:14px 12px;border-top:1px solid var(--line-soft);vertical-align:middle}
.table tr:hover td{background:rgba(0,240,255,.03)}
.table a{color:var(--cyan);text-decoration:none}
.table a:hover{text-decoration:underline}

/* ---- Misc ---- */
.empty{text-align:center;color:var(--muted);padding:40px 20px}
.center{text-align:center}
.mt{margin-top:22px}
.divider{height:1px;background:var(--line-soft);margin:24px 0}
.back-link{color:var(--muted);text-decoration:none;font-size:14px;display:inline-block;margin-bottom:18px}
.back-link:hover{color:var(--cyan)}
.copybox{display:flex;gap:8px;margin-top:10px}
.copybox .input{font-family:ui-monospace,monospace;font-size:12px}

.foot{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  max-width:860px;margin:40px auto 0;padding:24px;
  color:var(--muted);font-size:13px;border-top:1px solid var(--line-soft);
}
.foot a{color:var(--muted);text-decoration:none}
.foot a:hover{color:var(--cyan)}

/* ============================================================
   MEDIA QUERIES — kept at the bottom so they override the base
   styles above. A media query does NOT add specificity, so an
   overriding rule of equal specificity must come later in the file.
   ============================================================ */

/* Mobile navigation: collapse the nav behind the hamburger */
@media (max-width:560px){
  .topbar{flex-wrap:wrap;align-items:center;gap:12px}
  .brand{flex:1;min-width:0}               /* title shares the row and wraps within its space */
  .nav-toggle{display:flex;flex:0 0 auto}  /* button keeps its size, stays on the same row */
  .nav{
    display:none;width:100%;flex-direction:column;gap:4px;
    padding-top:12px;border-top:1px solid var(--line-soft);margin-top:12px;
  }
  .nav.open{display:flex}
  .nav a{padding:10px 4px}
}

@media (max-width:520px){
  .stat{flex-direction:column;align-items:flex-start;gap:8px}
  .bill-amt{width:100%}
}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important}
}

/* Admin table -> stacked cards on mobile */
@media (max-width:560px){
  .table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .table, .table tbody, .table tr, .table td{display:block;width:100%}
  .table tr{
    border:1px solid var(--line-soft);border-radius:12px;
    background:rgba(255,255,255,.02);padding:6px 14px;margin-bottom:12px;
  }
  .table td{
    display:flex;justify-content:space-between;align-items:center;gap:16px;
    border:0;padding:10px 0;text-align:right;word-break:break-word;
  }
  .table td::before{
    content:attr(data-label);flex:0 0 auto;
    color:var(--muted);font-size:12px;letter-spacing:.05em;text-transform:uppercase;text-align:left;
  }
  .table td:last-child{justify-content:flex-end}
}