:root{
  --bg:#f2f4f8; --surface:#fff; --surface-2:#f6f8fb; --line:#e2e7ef;
  --ink:#0d1220; --ink-2:#4a5468; --ink-3:#7a8497;
  --brand:#0d0f14; --brand-2:#1b1f29; --accent:#1790f9; --accent-ink:#fff; --accent-2:#0a78dc; --accent-soft:#e3f1ff;
  --green:#16a34a; --green-bg:#e7f7ec; --red:#dc2626; --red-bg:#fdecec; --amber:#b45309; --amber-bg:#fdf3e1;
  --blue:#2563eb; --blue-bg:#e8effd;
  --radius:16px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(13,18,32,.04),0 4px 16px rgba(13,18,32,.05);
  --side:248px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.45}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;letter-spacing:-.02em}
h1{font-size:26px;font-weight:800}
h2{font-size:17px;font-weight:700}
.ico{width:20px;height:20px;flex:none}
.muted{color:var(--ink-3)} .small{font-size:13px}
.num{font-variant-numeric:tabular-nums}

/* ---------- layout ---------- */
.side{position:fixed;inset:0 auto 0 0;width:var(--side);background:var(--brand);color:#d3d8e2;display:flex;flex-direction:column;padding:20px 14px;z-index:20}
.brand{display:flex;align-items:center;gap:10px;padding:4px 10px 22px;color:#fff;font-weight:800;font-size:19px;letter-spacing:-.02em}
.brand img{height:42px;width:auto}
.side nav{display:flex;flex-direction:column;gap:2px}
.side nav a{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;font-weight:500;color:#a9b1c1;transition:.15s}
.side nav a:hover{background:var(--brand-2);color:#fff}
.side nav a.on{background:var(--accent);color:#fff;font-weight:700;box-shadow:0 6px 18px rgba(23,144,249,.35)}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:14px}
.me{display:flex;align-items:center;gap:10px;padding:10px;border-top:1px solid rgba(255,255,255,.08);font-size:14px}
.me span:nth-child(2){flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.icon-btn{display:inline-flex;padding:7px;border-radius:9px;color:inherit}
.icon-btn:hover{background:rgba(255,255,255,.08)}
.main{margin-left:var(--side);padding:32px 36px 60px;max-width:1240px}
.tabbar{display:none}

.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.page-head p{margin:4px 0 0;color:var(--ink-3)}
.actions{display:flex;gap:8px;flex-wrap:wrap}

/* ---------- componentes ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.card-pad{padding:20px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px 0}
.card-head + .card-pad{padding-top:14px}
.grid{display:grid;gap:16px}
.grid>*,.stack>*{min-width:0}
.card-head{flex-wrap:wrap}
.g-4{grid-template-columns:repeat(4,1fr)} .g-3{grid-template-columns:repeat(3,1fr)} .g-2{grid-template-columns:repeat(2,1fr)}
.g-main{grid-template-columns:1.6fr 1fr}
.stack{display:flex;flex-direction:column;gap:16px}

.kpi{padding:18px 20px}
.kpi .lbl{font-size:13px;color:var(--ink-3);font-weight:500;display:flex;align-items:center;gap:6px}
.kpi .val{font-size:28px;font-weight:800;letter-spacing:-.03em;margin-top:6px}
.kpi .sub{font-size:13px;color:var(--ink-3);margin-top:2px}
.kpi.hero{background:linear-gradient(135deg,#0d0f14 0,#0d0f14 55%,#0f3d6e 100%);color:#fff;border-color:var(--brand);position:relative;overflow:hidden}
.kpi.hero::after{content:"";position:absolute;right:-46px;bottom:-46px;width:120px;height:120px;border-radius:50%;border:14px solid rgba(23,144,249,.28)}
.kpi.hero>*{position:relative;z-index:1}
.kpi.hero .lbl,.kpi.hero .sub{color:#a3acbd}
.kpi.hero .val{color:#fff}
.delta-up{color:var(--green);font-weight:600} .delta-down{color:var(--red);font-weight:600}
.kpi.hero .delta-up{color:#5fb6ff}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:12px;border:1px solid var(--line);background:var(--surface);font:inherit;font-weight:600;color:var(--ink);cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{border-color:#c6cfdc;background:var(--surface-2)}
.btn .ico{width:18px;height:18px}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:var(--accent-2);border-color:var(--accent-2)}
.btn-dark{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-dark:hover{background:var(--brand-2);border-color:var(--brand-2)}
.btn-wa{background:#25d366;border-color:#25d366;color:#fff}
.btn-wa:hover{background:#1fb859;border-color:#1fb859}
.btn-danger{color:var(--red)}
.btn-sm{padding:6px 11px;font-size:13px;border-radius:9px}
.btn-block{width:100%}

.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}
.b-green{background:var(--green-bg);color:var(--green)} .b-red{background:var(--red-bg);color:var(--red)}
.b-amber{background:var(--amber-bg);color:var(--amber)} .b-blue{background:var(--blue-bg);color:var(--blue)}
.b-gray{background:#eef1f6;color:var(--ink-2)}
.dot{width:7px;height:7px;border-radius:50%;background:currentColor}

.avatar{width:38px;height:38px;border-radius:12px;background:var(--accent-soft);color:var(--accent-2);display:inline-flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;flex:none}
.avatar.sm{width:30px;height:30px;border-radius:9px;font-size:12px}
.avatar.lg{width:64px;height:64px;border-radius:18px;font-size:22px}

/* accesos rápidos */
.quick{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:12px;margin-bottom:16px}
.quick a{display:flex;align-items:center;gap:12px;padding:16px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);transition:.15s;min-width:0}
.quick a:hover{border-color:var(--accent);transform:translateY(-1px)}
.quick a .ico{width:24px;height:24px;color:var(--accent-2);flex:none}
.quick b{display:block;font-size:14px}
.quick small{display:block;color:var(--ink-3);font-size:12px}
.quick .quick-main{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 8px 22px rgba(23,144,249,.35)}
.quick .quick-main .ico,.quick .quick-main small{color:#e3f1ff}
.quick .quick-main:hover{background:var(--accent-2)}

/* inscripción */
.insc .card{padding:28px}
.insc .brand img{height:96px}

/* tablas */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th{text-align:left;font-size:12px;font-weight:600;color:var(--ink-3);text-transform:uppercase;letter-spacing:.04em;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--surface-2)}
td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:0}
tbody tr{transition:background .1s}
tbody tr.link:hover{background:var(--surface-2);cursor:pointer}
td.right,th.right{text-align:right}
.person{display:flex;align-items:center;gap:12px}
.person b{display:block;font-weight:600}
.person small{color:var(--ink-3)}
tr.anulado td{opacity:.45;text-decoration:line-through}

/* listas */
.list{list-style:none;margin:0;padding:0}
.list li{display:flex;align-items:center;gap:12px;padding:12px 20px;border-top:1px solid var(--line)}
.list li:first-child{border-top:0}
.list .grow{flex:1;min-width:0}
.list .grow b{display:block;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.list .grow small{color:var(--ink-3)}
.empty{padding:36px 20px;text-align:center;color:var(--ink-3)}

/* formularios */
.form{display:grid;gap:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:6px}
.input,select.input,textarea.input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;font:inherit;color:var(--ink);transition:.15s}
.input:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 4px rgba(23,144,249,.18)}
.input.big{font-size:26px;font-weight:800;letter-spacing:-.02em;padding:12px 14px}
.hint{font-size:12px;color:var(--ink-3);margin-top:5px}
.row{display:grid;gap:16px;grid-template-columns:1fr 1fr}
.seg{display:flex;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:4px;gap:4px;flex-wrap:wrap}
.seg label{flex:1;margin:0}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;text-align:center;padding:8px 10px;border-radius:9px;font-weight:600;font-size:14px;color:var(--ink-2);cursor:pointer;white-space:nowrap}
.seg input:checked + span{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.seg input:focus-visible + span{outline:2px solid var(--accent)}

.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.search{position:relative;flex:1;min-width:220px}
.search .ico{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--ink-3);width:18px;height:18px}
.search .input{padding-left:38px}
.filters select.input{width:auto}

/* autocompletar alumno */
.ac{position:relative}
.ac-list{position:absolute;left:0;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px rgba(0,0,0,.12);z-index:30;max-height:320px;overflow:auto;display:none}
.ac-list.open{display:block}
.ac-item{display:flex;align-items:center;gap:10px;padding:10px 12px;cursor:pointer}
.ac-item:hover,.ac-item.sel{background:var(--surface-2)}
.ac-item small{color:var(--ink-3);display:block}
.chosen{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid #bcdcfb;background:#f1f8ff;border-radius:12px}
.chosen .grow{flex:1}

/* gráfico de barras */
.bars{display:flex;align-items:flex-end;gap:8px;height:190px;padding-top:24px}
.bar{flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end;position:relative}
.bar i{display:block;width:100%;max-width:38px;background:#dbe3ee;border-radius:8px 8px 4px 4px;min-height:3px;transition:background .15s}
.bar.cur i{background:var(--accent)}
.bar:hover i{background:#7cc0fb}
.bar small{font-size:11px;color:var(--ink-3);font-weight:500}
.bar .tip{position:absolute;top:-4px;transform:translateY(-100%);background:var(--brand);color:#fff;font-size:12px;font-weight:600;padding:4px 8px;border-radius:7px;white-space:nowrap;opacity:0;pointer-events:none;transition:.15s}
.bar:hover .tip{opacity:1}
.bar:nth-child(-n+2) .tip{left:0} .bar:nth-last-child(-n+2) .tip{right:0}

.progress{height:8px;background:#e8edf4;border-radius:99px;overflow:hidden}
.progress i{display:block;height:100%;background:var(--accent);border-radius:99px}

/* meses del alumno */
.months{display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.month{padding:10px 6px;border-radius:12px;text-align:center;font-size:12px;font-weight:600;border:1px solid var(--line);background:var(--surface-2);color:var(--ink-3)}
.month b{display:block;font-size:13px;color:var(--ink-2)}
.month.ok{background:var(--green-bg);border-color:#bfe8cb;color:var(--green)}
.month.ok b{color:#126b33}
.month.debe{background:var(--red-bg);border-color:#f6c7c7;color:var(--red)}
.month.debe b{color:#9b1c1c}

.toast{padding:12px 16px;border-radius:12px;margin-bottom:20px;font-weight:600;background:var(--green-bg);color:#126b33;border:1px solid #bfe8cb}
.toast.error{background:var(--red-bg);color:#9b1c1c;border-color:#f6c7c7}

/* login */
.auth{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(900px 500px at 100% 0,rgba(23,144,249,.45) 0,transparent 60%),radial-gradient(700px 500px at 0 100%,rgba(23,144,249,.18) 0,transparent 60%),var(--brand)}
.auth .card{width:100%;max-width:400px;padding:32px}
.auth .brand{color:var(--ink);flex-direction:column;justify-content:center;padding:0 0 8px;font-size:22px;gap:12px}
.auth .brand img{height:120px}
.auth .brand span{display:none}
.auth h1{font-size:20px;text-align:center;margin-bottom:22px;color:var(--ink-2);font-weight:600}

/* recibo */
.recibo-page{background:var(--bg);min-height:100vh;padding:28px 16px}
.recibo{max-width:820px;margin:0 auto;background:#fff;border-radius:22px;overflow:hidden;box-shadow:0 2px 4px rgba(13,18,32,.04),0 18px 48px rgba(13,18,32,.12);position:relative}
.rc-head{position:relative;display:flex;align-items:center;gap:22px;padding:26px 32px;color:#fff;
  background:linear-gradient(115deg,#0d0f14 0,#0d0f14 52%,#1790f9 52%,#0a78dc 100%);overflow:hidden}
.rc-head::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;border:26px solid rgba(255,255,255,.10)}
.rc-escudo{height:118px;width:auto;flex:none;filter:drop-shadow(0 8px 18px rgba(0,0,0,.45));position:relative;z-index:1}
.rc-head-txt{flex:1;min-width:0;position:relative;z-index:1}
.rc-head-txt small{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;background:rgba(255,255,255,.14);padding:3px 9px;border-radius:99px}
.rc-head-txt h2{font-size:30px;font-weight:800;letter-spacing:-.02em;margin:8px 0 2px;color:#fff}
.rc-head-txt span{color:#c9d6ea;font-size:14px}
.rc-nro{position:relative;z-index:1;text-align:right;background:#fff;color:var(--ink);border-radius:14px;padding:10px 16px;box-shadow:0 8px 20px rgba(0,0,0,.18)}
.rc-nro small{display:block;font-size:11px;font-weight:700;letter-spacing:.12em;color:var(--ink-3)}
.rc-nro b{font-size:22px;font-weight:800;letter-spacing:.02em}
.rc-body{position:relative;padding:28px 32px 26px}
.rc-principal{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.rc-body small{display:block;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);margin-bottom:4px}
.rc-alumno b{display:block;font-size:24px;font-weight:800;letter-spacing:-.02em;line-height:1.15}
.rc-alumno span{color:var(--ink-3);font-size:14px}
.rc-importe{text-align:right;background:var(--accent-soft);border-radius:16px;padding:12px 20px}
.rc-importe small{color:var(--accent-2)}
.rc-importe b{font-size:38px;font-weight:800;letter-spacing:-.03em;color:var(--accent-2);line-height:1}
.rc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:20px}
.rc-grid>div{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;min-width:0}
.rc-grid b{display:block;font-weight:700;font-size:15px}
.rc-grid span{display:block;color:var(--ink-3);font-size:12px;margin-top:2px}
.rc-sello{position:absolute;right:250px;top:44px;padding:6px 16px;border:3px solid var(--green);color:var(--green);border-radius:10px;font-weight:900;letter-spacing:.18em;font-size:20px;transform:rotate(-12deg);opacity:.22;pointer-events:none}
.rc-sello.anulado{border-color:var(--red);color:var(--red);opacity:.6}
.rc-corte{position:relative;height:0;border-top:2px dashed #d5dce7;margin:0 26px}
.rc-corte::before,.rc-corte::after{content:"";position:absolute;top:-13px;width:24px;height:24px;border-radius:50%;background:var(--bg)}
.rc-corte::before{left:-40px} .rc-corte::after{right:-40px}
.rc-redes{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px 18px;padding:20px 32px}
.rc-redes>div{display:flex;align-items:center;gap:10px;min-width:0;font-size:14px;font-weight:600;color:var(--ink-2)}
.rc-red{overflow-wrap:anywhere}
.rc-ico{width:36px;height:36px;border-radius:10px;background:#0d0f14;color:#fff;display:grid;place-items:center;flex:none}
.rc-redes>div:nth-child(even) .rc-ico{background:var(--accent)}
.rc-ico svg{width:20px;height:20px}
.rc-pie{background:#0d0f14;color:#c9cfdb;padding:18px 32px 22px;font-size:12.5px;line-height:1.5;border-top:4px solid var(--accent)}
.rc-pie p{margin:0 0 5px}
.rc-lema{font-size:15px;color:#fff;margin-bottom:10px!important}
.rc-marca{font-family:Pacifico,cursive;font-size:28px;line-height:1;margin-right:6px;color:#fff}
.recibo-actions{max-width:820px;margin:18px auto 0;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
@media (max-width:680px){
  .rc-head{flex-wrap:wrap;padding:20px;gap:14px;background:linear-gradient(160deg,#0d0f14 0,#0d0f14 58%,#1790f9 58%,#0a78dc 100%)}
  .rc-escudo{height:84px}
  .rc-head-txt h2{font-size:23px}
  .rc-nro{padding:6px 12px} .rc-nro b{font-size:17px}
  .rc-body{padding:20px}
  .rc-principal{flex-direction:column;align-items:stretch}
  .rc-importe{text-align:left}
  .rc-grid{grid-template-columns:1fr 1fr}
  .rc-sello{top:20px;right:20px;font-size:15px}
  .rc-corte{margin:0 14px} .rc-corte::before{left:-26px} .rc-corte::after{right:-26px}
  .rc-redes{padding:18px 20px;display:grid;grid-template-columns:1fr}
  .rc-pie{padding:16px 20px 20px}
}

@media print{
  @page{size:A4 portrait;margin:0}
  html,body{background:#fff!important}
  body{padding:12mm 12mm 0}
  .side,.tabbar,.recibo-actions,.no-print,.toast{display:none!important}
  .main{margin:0!important;padding:0!important;max-width:none}
  .recibo-page{padding:0!important;min-height:0!important;background:#fff}
  .recibo{max-width:none;width:100%;box-shadow:none;border:1px solid #d5dce7;border-radius:14px;break-inside:avoid;page-break-inside:avoid}
  .rc-corte::before,.rc-corte::after{display:none}
  .rc-head,.rc-pie,.rc-ico,.rc-nro,.rc-importe,.rc-grid>div,.rc-sello{-webkit-print-color-adjust:exact;print-color-adjust:exact}
  /* compacto: siempre layout de escritorio, entra en una hoja */
  .rc-head{flex-wrap:nowrap;padding:16px 22px;gap:16px;background:linear-gradient(115deg,#0d0f14 0,#0d0f14 52%,#1790f9 52%,#0a78dc 100%)}
  .rc-escudo{height:84px}
  .rc-head-txt h2{font-size:24px;margin:5px 0 0}
  .rc-nro{padding:7px 12px} .rc-nro b{font-size:18px}
  .rc-body{padding:16px 22px}
  .rc-principal{flex-direction:row;align-items:flex-end;padding-bottom:14px}
  .rc-alumno b{font-size:20px}
  .rc-importe{text-align:right;padding:8px 14px} .rc-importe b{font-size:28px}
  .rc-grid{grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
  .rc-grid>div{padding:8px 10px} .rc-grid b{font-size:13px}
  .rc-sello{top:26px;right:210px;font-size:16px}
  .rc-corte{margin:0 16px}
  .rc-redes{display:grid;grid-template-columns:repeat(4,auto);justify-content:space-between;padding:12px 22px;gap:8px}
  .rc-redes>div{font-size:10.5px;gap:6px}
  .rc-red{white-space:nowrap;overflow-wrap:normal}
  .rc-ico{width:26px;height:26px;border-radius:7px} .rc-ico svg{width:15px;height:15px}
  .rc-pie{padding:12px 22px 14px;font-size:10.5px;line-height:1.4;border-top-width:3px}
  .rc-lema{font-size:13px;margin-bottom:6px!important}
  .rc-marca{font-size:22px}
}
}

/* ---------- responsive ---------- */
@media (max-width:1100px){ .g-4,.quick{grid-template-columns:repeat(2,1fr)} .g-main{grid-template-columns:1fr} }
@media (max-width:860px){
  .side{display:none}
  .main{margin-left:0;padding:20px 16px 110px}
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;background:var(--brand);padding:8px 8px calc(8px + env(safe-area-inset-bottom));z-index:20;justify-content:space-around;align-items:center}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;font-size:11px;font-weight:600;color:#8f99ab;padding:6px 2px;border-radius:10px;min-width:0}
  .bars{gap:4px}
  .bar small{font-size:10px}
  .bar .tip{display:none}
  .tabbar a.on{color:#5fb6ff}
  .tabbar .fab{flex:none;background:var(--accent);color:var(--accent-ink);width:54px;height:54px;min-width:0;border-radius:18px;justify-content:center;margin-top:-26px;box-shadow:0 8px 20px rgba(0,0,0,.25)}
  .tabbar .fab .ico{width:26px;height:26px}
  h1{font-size:22px}
  .g-3,.g-2,.row{grid-template-columns:1fr}
  .kpi .val{font-size:23px}
  .months{grid-template-columns:repeat(4,1fr)}
  .hide-m{display:none}
  td,th{padding:11px 12px}
  .page-head .actions .btn-primary{display:none}
}
@media (max-width:420px){ .g-4{grid-template-columns:1fr 1fr;gap:10px} .quick{grid-template-columns:1fr;gap:8px} .quick a{padding:12px 14px} .kpi{padding:14px} .kpi .val{font-size:19px;overflow-wrap:anywhere} .kpi .lbl,.kpi .sub{font-size:12px} .months{grid-template-columns:repeat(3,1fr)} }