/* MailFlow — regla de diseño: letra grande, una acción principal por pantalla, frases que se entienden sin formación. */
:root{
  --ink:#14202b;--ink-2:#33414e;--muted:#5b6876;--faint:#8a95a1;--line:#e4e8ed;--line-2:#eef1f4;
  --bg:#f5f7f9;--card:#fff;--brand:#1f6f8b;--brand-2:#175a71;--brand-soft:#e9f3f7;
  --ok:#1e8e5a;--ok-soft:#e7f5ee;--warn:#b7791f;--warn-soft:#fdf5e6;--bad:#c2413a;--bad-soft:#fcecea;
  --r:14px;--r-sm:10px;--shadow:0 1px 2px rgba(20,32,43,.04),0 4px 16px rgba(20,32,43,.05);
  --side:248px;
}
*{box-sizing:border-box}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;line-height:1.5}
a{color:var(--brand)}
button{font:inherit;color:inherit}
h1{font-size:1.75rem;line-height:1.2;margin:0 0 4px;letter-spacing:-.4px}
h2{font-size:1.15rem;margin:0 0 12px;letter-spacing:-.1px}
h3{font-size:1rem;margin:0 0 6px}
.sub{color:var(--muted);margin:0 0 22px;font-size:1.02rem}
.muted{color:var(--muted)}.faint{color:var(--faint)}.small{font-size:.88rem}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.86rem;background:var(--line-2);padding:2px 6px;border-radius:6px;word-break:break-all}

/* ---------- Estructura ---------- */
.shell{display:flex;min-height:100vh}
.side{width:var(--side);flex:none;background:#fff;border-right:1px solid var(--line);position:sticky;top:0;height:100vh;display:flex;flex-direction:column;padding:18px 14px}
.side .acc{padding:6px 10px 16px;border-bottom:1px solid var(--line-2);margin-bottom:12px}
.side .acc b{display:block;font-size:1.05rem;line-height:1.25}.side .acc small{color:var(--muted);font-size:.84rem}
.side .acc button{margin-top:8px}
.nav-i{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:var(--r-sm);color:var(--ink-2);text-decoration:none;font-weight:550;font-size:.98rem}
.nav-i:hover{background:var(--line-2)}
.nav-i.on{background:var(--brand-soft);color:var(--brand-2)}
.nav-i .ic{width:22px;text-align:center;font-size:1.05rem}
.nav-i .count{margin-left:auto;background:var(--bad);color:#fff;border-radius:999px;font-size:.72rem;padding:1px 7px;font-weight:700}
.side .foot{margin-top:auto;border-top:1px solid var(--line-2);padding-top:12px}
.main{flex:1;min-width:0}
.page{max-width:1080px;margin:0 auto;padding:28px 32px 80px}
.page.narrow{max-width:760px}
.topbar{display:none}
.tabbar{display:none}
.head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.head .sub{margin:0}
.crumbs{font-size:.9rem;color:var(--muted);margin-bottom:8px}.crumbs a{text-decoration:none}

@media (max-width:900px){
  .side{display:none}
  .page{padding:18px 16px 110px}
  .topbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
  .topbar b{font-size:1rem}
  .tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);z-index:20;padding-bottom:env(safe-area-inset-bottom)}
  .tabbar a{display:flex;flex-direction:column;align-items:center;gap:2px;padding:9px 2px 8px;font-size:.72rem;color:var(--muted);text-decoration:none;font-weight:600}
  .tabbar a .ic{font-size:1.2rem}.tabbar a.on{color:var(--brand)}
  h1{font-size:1.45rem}
}

/* ---------- Piezas ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.card + .card{margin-top:14px}
.card.flat{box-shadow:none}
.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.split{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.split{grid-template-columns:1fr}}
@media (max-width:520px){.g2{grid-template-columns:1fr}}
.stack>*+*{margin-top:14px}
.row{display:flex;align-items:center;gap:12px}.row.between{justify-content:space-between}.row.wrap{flex-wrap:wrap}
.sp{flex:1}

.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;box-shadow:var(--shadow)}
.kpi .v{font-size:1.9rem;font-weight:700;letter-spacing:-.6px;line-height:1.1;font-variant-numeric:tabular-nums}
.kpi .l{color:var(--muted);font-size:.9rem;margin-top:4px}
.kpi .h{color:var(--faint);font-size:.8rem;margin-top:2px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:650;font-size:1rem;padding:12px 18px;border-radius:var(--r-sm);border:1px solid transparent;cursor:pointer;background:var(--brand);color:#fff;text-decoration:none;white-space:nowrap;min-height:46px}
.btn:hover{background:var(--brand-2)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.sec{background:#fff;color:var(--ink);border-color:var(--line)}.btn.sec:hover{background:var(--line-2)}
.btn.ghost{background:transparent;color:var(--muted);border-color:transparent}.btn.ghost:hover{background:var(--line-2)}
.btn.danger{background:#fff;color:var(--bad);border-color:#f0c9c6}.btn.danger:hover{background:var(--bad-soft)}
.btn.sm{padding:7px 12px;font-size:.9rem;min-height:36px}
.btn.block{width:100%}
.link{background:none;border:0;padding:0;color:var(--brand);cursor:pointer;font-weight:600}

.badge{display:inline-flex;align-items:center;gap:6px;font-size:.8rem;font-weight:650;padding:3px 10px;border-radius:999px;background:var(--line-2);color:var(--muted);white-space:nowrap}
.badge.ok{background:var(--ok-soft);color:var(--ok)}.badge.warn{background:var(--warn-soft);color:var(--warn)}.badge.bad{background:var(--bad-soft);color:var(--bad)}.badge.brand{background:var(--brand-soft);color:var(--brand-2)}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;flex:none}
.dot.ok{background:var(--ok)}.dot.warn{background:var(--warn)}.dot.bad{background:var(--bad)}

.alert{display:flex;gap:14px;align-items:flex-start;border-radius:var(--r);padding:16px 18px;border:1px solid;margin-bottom:18px}
.alert .ic{font-size:1.3rem;line-height:1.2}
.alert.warn{background:var(--warn-soft);border-color:#f1dfae;color:#6b4d00}
.alert.bad{background:var(--bad-soft);border-color:#f0c9c6;color:#7a241f}
.alert.info{background:var(--brand-soft);border-color:#cfe4ec;color:#174b5c}
.alert.ok{background:var(--ok-soft);border-color:#c5e8d5;color:#155c3b}
.alert b{display:block}

/* Listas tipo tabla que en el móvil se convierten en tarjetas */
.table{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow)}
.tr{display:grid;grid-template-columns:var(--cols,1fr);gap:14px;align-items:center;padding:14px 18px;border-top:1px solid var(--line-2);text-decoration:none;color:inherit}
.tr:first-child{border-top:0}
a.tr:hover,button.tr:hover{background:#fafbfc}
button.tr{width:100%;text-align:left;background:none;border-left:0;border-right:0;border-bottom:0;cursor:pointer}
.th{font-size:.78rem;text-transform:uppercase;letter-spacing:.5px;color:var(--faint);font-weight:700;background:#fafbfc}
.tr .t{font-weight:650;overflow:hidden;text-overflow:ellipsis}
.tr .num{text-align:right;font-variant-numeric:tabular-nums}
@media (max-width:720px){.tr{grid-template-columns:1fr auto !important}.tr .hide-m{display:none}.th{display:none}}

.tabs{display:flex;gap:6px;margin-bottom:16px;overflow-x:auto;scrollbar-width:none}
.tabs button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;font-weight:600;cursor:pointer;white-space:nowrap;color:var(--ink-2)}
.tabs button.on{background:var(--ink);border-color:var(--ink);color:#fff}
.tabs button .n{opacity:.6;margin-left:4px}

/* Formularios */
label.f{display:block;margin-bottom:16px}
label.f>span{display:block;font-weight:650;margin-bottom:6px}
label.f>small{display:block;color:var(--muted);margin-top:6px;font-size:.87rem}
label.f .err{color:var(--bad);font-size:.87rem;margin-top:6px;display:block}
input,select,textarea{width:100%;font:inherit;font-size:1rem;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:#fff;color:var(--ink)}
textarea{min-height:110px;resize:vertical;line-height:1.5}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
input[type=color]{padding:4px;height:46px}
.search{position:relative}.search input{padding-left:40px}.search:before{content:"🔎";position:absolute;left:14px;top:50%;transform:translateY(-50%);font-size:.9rem;opacity:.6}

.opt{display:flex;gap:14px;align-items:flex-start;width:100%;text-align:left;background:#fff;border:1.5px solid var(--line);border-radius:var(--r-sm);padding:14px 16px;cursor:pointer;margin-bottom:10px}
.opt:hover{border-color:#c9d3dc}
.opt.sel{border-color:var(--brand);background:var(--brand-soft)}
.opt .ic{font-size:1.4rem;line-height:1.2}
.opt b{display:block}.opt span{color:var(--muted);font-size:.92rem}
.opt .r{margin-left:auto;text-align:right;white-space:nowrap}

/* Asistente */
.steps{display:flex;gap:8px;margin-bottom:22px}
.steps div{flex:1}
.steps i{display:block;height:5px;border-radius:3px;background:var(--line)}
.steps div.on i{background:var(--brand)}
.steps small{display:block;margin-top:6px;font-size:.78rem;color:var(--faint);font-weight:600}
.steps div.on small{color:var(--brand-2)}
@media (max-width:520px){.steps small{display:none}}
.wizard-foot{display:flex;gap:10px;justify-content:space-between;margin-top:22px;padding-top:18px;border-top:1px solid var(--line-2)}

/* Vista previa de correo */
.preview{background:#eef1f4;border-radius:var(--r);padding:14px;border:1px solid var(--line)}
.preview .inbox{background:#fff;border-radius:var(--r-sm);padding:12px 14px;margin-bottom:12px;font-size:.92rem}
.preview .inbox b{display:block}.preview .inbox span{color:var(--muted)}
.preview iframe{width:100%;border:0;border-radius:var(--r-sm);background:#fff;display:block;min-height:520px}
.devices{display:flex;gap:6px}

/* Editor de plantillas */
.editor{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:1000px){.editor{grid-template-columns:1fr}}
.blk{background:#fff;border:1.5px solid var(--line);border-radius:var(--r-sm);margin-bottom:10px}
.blk.sel{border-color:var(--brand)}
.blk .bh{display:flex;align-items:center;gap:8px;padding:10px 12px;cursor:pointer}
.blk .bh b{font-size:.95rem}.blk .bh .t{color:var(--muted);font-size:.88rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}
.blk .bb{padding:4px 14px 14px;border-top:1px solid var(--line-2)}
.blk .bb label.f{margin:12px 0 0}
.iconbtn{background:none;border:1px solid var(--line);border-radius:8px;width:32px;height:32px;cursor:pointer;flex:none;color:var(--muted)}
.iconbtn:hover{background:var(--line-2)}
.adder{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.adder button{background:#fff;border:1.5px dashed #cbd4dd;border-radius:var(--r-sm);padding:10px 6px;cursor:pointer;font-size:.86rem;font-weight:600;color:var(--ink-2)}
.adder button:hover{border-color:var(--brand);color:var(--brand)}
.adder button span{display:block;font-size:1.2rem}
.sticky{position:sticky;top:20px}

/* Gráfica */
.chart{width:100%;height:auto;display:block}
.chart text{font-size:11px;fill:var(--faint)}
.bar-row{display:flex;align-items:center;gap:10px;margin:8px 0}
.bar-row .lbl{width:120px;font-size:.88rem;color:var(--muted);flex:none}
.bar{flex:1;height:10px;background:var(--line-2);border-radius:6px;overflow:hidden}.bar i{display:block;height:100%;background:var(--brand);border-radius:6px}

/* Vacíos, carga, avisos */
.empty{text-align:center;padding:44px 20px}
.empty .ic{font-size:2.6rem}.empty h2{margin:10px 0 6px}.empty p{color:var(--muted);margin:0 auto 18px;max-width:440px}
.skel{background:linear-gradient(90deg,#eef1f4,#f6f8fa,#eef1f4);background-size:200% 100%;animation:sk 1.2s infinite;border-radius:var(--r);height:90px}
@keyframes sk{to{background-position:-200% 0}}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 18px;border-radius:var(--r-sm);font-weight:600;z-index:100;box-shadow:0 8px 30px rgba(0,0,0,.2);max-width:calc(100% - 32px)}
.toast.bad{background:var(--bad)}
@media (max-width:900px){.toast{bottom:84px}}
.modal-bg{position:fixed;inset:0;background:rgba(20,32,43,.45);z-index:90;display:flex;align-items:center;justify-content:center;padding:16px}
.modal{background:#fff;border-radius:var(--r);max-width:520px;width:100%;padding:22px;max-height:90vh;overflow:auto}
.modal h2{margin-bottom:8px}

/* Checklist de puesta a punto */
.step{display:flex;gap:14px;align-items:flex-start}
.step .n{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex:none;background:var(--line-2);color:var(--muted)}
.step .n.ok{background:var(--ok);color:#fff}.step .n.wait{background:var(--warn);color:#fff}.step .n.bad{background:var(--bad);color:#fff}
.rec{border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;margin-top:10px;background:#fcfdfd}
.rec .k{font-size:.78rem;color:var(--faint);font-weight:700;text-transform:uppercase;letter-spacing:.4px;margin-top:8px}

/* Login */
.auth{max-width:420px;margin:10vh auto;padding:0 16px}
.logo{font-weight:800;font-size:1.25rem;letter-spacing:-.3px}.logo span{color:var(--brand)}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--brand-soft);color:var(--brand-2);display:flex;align-items:center;justify-content:center;font-weight:700;flex:none;font-size:.9rem}
.tag{display:inline-block;font-size:.78rem;padding:2px 8px;border-radius:6px;background:var(--line-2);color:var(--ink-2);margin:2px 4px 2px 0}
.hr{height:1px;background:var(--line-2);margin:18px 0}
.chips{display:flex;flex-wrap:wrap;gap:6px}
a.opt,a.alert,a.card{text-decoration:none;color:inherit}
a.opt span:not(.ic){color:var(--muted)}