:root{
  /* Corporate palette: dark blue, financial green, white */
  --bg:#f6f8fa;
  --card:#ffffff;
  --accent-strong:#0b2740; /* dark blue */
  --accent:#0f4f3a; /* financial green */
  --accent-2:#1a7f5a;
  --muted:#59676f;
  --danger:#b9382b;
  --radius:10px;
  --gap:12px;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial;
}

/* Base layout */
*{box-sizing:border-box}
html,body,#app{height:100%}
body{
  margin:0;
  background:linear-gradient(180deg, #f3fbfc 0%, var(--bg) 100%);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding:16px;
  display:flex;
  align-items:flex-start;
  justify-content:center;
  font-size:15px;
  color:#0c2b2d;
}

/* Container fits a single mobile viewport without scrolling */
main#app{
  width:100%;
  max-width:720px;
  display:grid;
  grid-template-rows:auto 1fr;
  gap:var(--gap);
  height:calc(100vh - 32px);
}

/* Panels with subtle frosted look and depth */
.panel{
  background:var(--card);
  border-radius:var(--radius);
  padding:16px;
  box-shadow:
    0 2px 6px rgba(10,20,22,0.04),
    0 18px 36px rgba(6,38,40,0.06);
  border:1px solid rgba(15,27,28,0.04);
  backdrop-filter: blur(6px);
}

/* Top */
.row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}

.rates{font-size:13px;color:var(--muted);line-height:1.2}
.rates strong{color:var(--accent)}
.controls{display:flex;align-items:center;}

/* Switch */
.switch{
  display:inline-flex;
  align-items:center;
  gap:10px;
  cursor:pointer;
  user-select:none;
}
.switch .label{font-size:13px;color:var(--muted);min-width:86px;text-align:left}
.switch input{display:none}
.slider{
  width:56px;height:30px;background:#eaf6f8;border-radius:999px;position:relative;flex:0 0 auto;
  transition:background .18s;
  box-shadow:
    inset 0 -2px 0 rgba(0,0,0,0.02),
    0 4px 10px rgba(8,20,20,0.04);
}
.slider:after{
  content:"";width:24px;height:24px;background:linear-gradient(180deg,#ffffff,#edf9fa);border-radius:50%;position:absolute;left:3px;top:3px;
  box-shadow:0 8px 18px rgba(6,30,30,0.08), 0 2px 4px rgba(6,30,30,0.04);
  transition:transform .18s;
}
.switch input:checked + .slider{background:linear-gradient(90deg,var(--accent-2),var(--accent))}
.switch input:checked + .slider:after{transform:translateX(26px)}

/* Form */
.form{display:grid;gap:12px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;color:var(--muted)}
.field input, .field select{
  padding:14px 16px;border-radius:14px;border:1px solid rgba(6,30,30,0.06);background:linear-gradient(180deg,#ffffff,#f6fbfb);font-size:15px;
  outline:none;
  transition:box-shadow .14s, border-color .14s, transform .08s;
  box-shadow:
    0 6px 18px rgba(6,30,30,0.06),
    inset 0 -6px 14px rgba(13,60,62,0.02);
  transform:translateZ(0);
}

/* Prominent "Monto" and "Cliente" inputs: always appear highly active with bright accent and persistent glow */
#amount, #client{
  font-size:20px;
  font-weight:800;
  color:var(--accent);
  padding:18px 20px;
  border-radius:16px;
  border:2px solid rgba(15,127,92,0.22); /* stronger green tint */
  background:linear-gradient(180deg,#ffffff,#eaf9fb);
  box-shadow:
    0 30px 60px rgba(10,90,96,0.10),    /* deeper ambient shadow */
    0 10px 28px rgba(6,30,30,0.06),
    0 0 28px rgba(26,127,90,0.14),      /* persistent green glow */
    inset 0 -6px 14px rgba(13,60,62,0.03);
  transition:box-shadow .12s, border-color .12s, transform .08s;
}

/* Stronger focus state — brighter glow and subtle lift for clear affordance */
#amount:focus, #client:focus{
  border-color:var(--accent-2);
  box-shadow:
    0 36px 80px rgba(10,120,104,0.14),
    0 12px 32px rgba(6,30,30,0.08),
    0 0 42px rgba(26,127,90,0.22),
    inset 0 -6px 14px rgba(13,60,62,0.03);
  transform:translateY(-4px);
  outline: none;
}

/* Focus state — subtle glow and lift for clear affordance */
#amount:focus{
  border-color:var(--accent-2);
  box-shadow:
    0 28px 60px rgba(10,90,96,0.10),
    0 8px 22px rgba(6,30,30,0.08),
    0 0 18px rgba(38,163,176,0.18),
    inset 0 -6px 14px rgba(13,60,62,0.02);
  transform:translateY(-3px);
  outline: none;
}

/* Slightly larger placeholder contrast for visibility */
.field input::placeholder{color:#8fbec2}
.field input::placeholder{color:#b9d2d5}
.field input:focus, .field select:focus{
  box-shadow:
    0 16px 36px rgba(6,30,30,0.09),
    inset 0 -6px 14px rgba(13,60,62,0.02);
  border-color:var(--accent-2);
  transform:translateY(-2px);
}

/* subtle 3D pressed state for inputs on active */
.field input:active, .field select:active{
  transform:translateY(0);
  box-shadow:
    0 6px 12px rgba(6,30,30,0.06),
    inset 0 3px 8px rgba(255,255,255,0.6);
}

/* Summary & actions */
.summary{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--muted);padding:12px;border-radius:12px;background:linear-gradient(180deg,#fbffff,#f3fbfb);border:1px solid rgba(6,30,30,0.03)}
.actions{display:flex;gap:10px;margin-top:6px}

/* 3D buttons: layered shadows, slight extrusion and active press */
/* Minimal corporate buttons */
button{
  border:0;padding:10px 14px;border-radius:8px;background:var(--accent-strong);color:white;font-weight:700;min-width:44px;min-height:42px;cursor:pointer;transition:transform .12s, box-shadow .12s, background .12s;
  box-shadow:none;
  transform:translateZ(0);
}
button.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:white}
button:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(11,39,64,0.08)}
button:active{transform:translateY(0);box-shadow:none;opacity:.95}
button.ghost{background:transparent;color:var(--accent-strong);border:1px solid rgba(9,28,44,0.06);box-shadow:none}

/* Small action buttons used in list with depth */
.btn-small{
  padding:8px 10px;border-radius:10px;font-weight:600;border:1px solid transparent;background:#ffffff;color:var(--accent);cursor:pointer;min-width:64px;
  box-shadow:0 8px 18px rgba(6,30,30,0.06);
}
.btn-small.ghost{background:transparent;border-color:rgba(6,30,30,0.04);color:var(--muted);box-shadow:none}
.btn-small.danger{background:transparent;border-color:rgba(192,57,43,0.08);color:var(--danger)}
.btn-small.print{background:linear-gradient(90deg,#ffffff,#f7fefe);border-color:#e6f7f9;color:var(--accent);box-shadow:0 8px 20px rgba(6,30,30,0.06)}

/* Celeste "selected" state for control filter buttons */
.btn-small.active{
  background: linear-gradient(90deg,#9eeef9,#5fd6ea);
  color: #06383a;
  border-color: transparent;
  box-shadow: 0 12px 36px rgba(95,214,234,0.24), 0 6px 18px rgba(6,56,58,0.06);
  transform:translateY(-4px);
  text-shadow:0 1px 0 rgba(255,255,255,0.12);
}

/* Invoices list */
.invoices{overflow:hidden;display:flex;flex-direction:column;height:100%}
.invoices-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.invoices-header h3{margin:0;font-size:16px;color:#08393b}
.list{list-style:none;margin:0;padding:0;overflow:auto;border-radius:8px;flex:1}
.list li{
  display:flex;justify-content:space-between;align-items:center;padding:12px;border-bottom:1px dashed rgba(6,30,30,0.03);
  align-items:flex-start;
  /* Brighter active background with subtle green tint to convey persistent activity */
  background:linear-gradient(180deg, rgba(245,255,253,0.95), rgba(238,fff,250,0.95));
  border-radius:10px;
  margin:6px 6px;

  /* Persistent accent border and glow to keep entries deeply active */
  border:1px solid rgba(26,127,90,0.14);
  box-shadow:
    0 10px 28px rgba(10,90,96,0.08),   /* ambient depth */
    0 0 36px rgba(26,127,90,0.16),     /* strong green glow */
    inset 0 -6px 12px rgba(13,60,62,0.02);

  transform:translateZ(0);
  transition:transform .18s, box-shadow .18s, border-color .18s, background .18s;
}

/* Slight lift and intensified glow on hover/focus for affordance (touch-friendly) */
.list li:hover, .list li:focus-within{
  transform:translateY(-6px);
  border-color:rgba(26,127,90,0.24);
  box-shadow:
    0 18px 42px rgba(10,120,104,0.10),
    0 0 56px rgba(26,127,90,0.26),
    inset 0 -8px 18px rgba(13,60,62,0.03);
}

/* Make meta text stand out against bright active background */
.invoice-meta strong{color:var(--accent-strong)}
.invoice-meta .small{color:var(--muted)}
.invoice-meta{display:flex;flex-direction:column;gap:6px}
.invoice-meta .small{font-size:13px;color:var(--muted)}
.invoice-meta strong{font-size:15px}
.invoice-actions{display:flex;gap:8px;align-items:center}

/* Empty */
.empty{padding:18px;color:var(--muted);text-align:center;font-size:14px}

/* Toast */
.toast{
  position:fixed;left:50%;transform:translateX(-50%);bottom:18px;background:#0c2b2d;color:#e6fbfb;padding:10px 14px;border-radius:999px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .18s;
  box-shadow:0 10px 30px rgba(6,30,30,0.12);
}
.toast.show{opacity:1;pointer-events:auto}

/* Make sure everything fits one screen height on typical mobile: reduce spacing if needed */
@media (max-height:640px){
  .panel{padding:10px}
  .field input, button{padding:8px}
}

/* Printable invoice view (new window) */
.printable{
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  padding:20px;
  color:#0c2b2d;
}
.printable .header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.printable .box{border:1px solid #e6f1f2;padding:14px;border-radius:8px;margin-bottom:12px;background:#fff}
.printable h2{margin:0 0 6px 0;font-size:18px}
.printable .muted{color:var(--muted);font-size:13px;font-weight:900;color:#000}

/* Print styles to hide UI chrome */
@media print{
  body *{visibility:hidden}
  .printable, .printable *{visibility:visible}
  .printable{position:fixed;left:0;top:0;width:100%}
}

/* Blocking modal for cierre de caja downloads */
.cierre-modal{
  position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(8,20,22,0.48);z-index:9999;
}
.cierre-sheet{
  background:var(--card);padding:18px;border-radius:12px;max-width:420px;width:92%;box-shadow:0 14px 40px rgba(6,30,30,0.24);border:1px solid rgba(6,30,30,0.06);
}
.cierre-sheet h3{margin:0 0 8px 0;color:var(--accent-strong)}
.cierre-sheet p{margin:0;color:var(--muted)}

/* Login modal (blocks app until authenticated) */
.login-modal{
  position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(8,20,22,0.6);z-index:10000;
}
.login-sheet{
  background:var(--card);padding:18px;border-radius:12px;max-width:420px;width:92%;box-shadow:0 18px 46px rgba(6,30,30,0.28);border:1px solid rgba(6,30,30,0.06);
}
.login-sheet h3{margin:0 0 8px 0;color:var(--accent-strong);font-size:18px}
.login-sheet input{
  padding:12px 14px;border-radius:10px;border:1px solid rgba(6,30,30,0.06);background:linear-gradient(180deg,#ffffff,#f6fbfb);font-size:15px;
}