/* ===== SMS Manager · estilos base ===== */
:root {
    --bg: #f4f6fb;
    --panel: #ffffff;
    --texto: #1f2733;
    --texto-suave: #667085;
    --borde: #e3e8f0;
    --primario: #2563eb;
    --primario-txt: #ffffff;
    --ok-bg: #e7f7ee; --ok-txt: #1a7f4b;
    --warn-bg: #fff4e5; --warn-txt: #b25e09;
    --off-bg: #f0f1f4; --off-txt: #6b7280;
    --peligro: #dc2626;
    --sidebar: #101828;
    --sidebar-txt: #cdd5e0;
    --sombra: 0 1px 3px rgba(16,24,40,.08), 0 1px 2px rgba(16,24,40,.06);
    --radio: 10px;
}
html[data-theme="dark"] {
    --bg: #0b1017;
    --panel: #151c26;
    --texto: #e7ecf3;
    --texto-suave: #93a0b4;
    --borde: #26303d;
    --primario: #3b82f6;
    --ok-bg: #10291c; --ok-txt: #4ade80;
    --warn-bg: #2e2410; --warn-txt: #fbbf24;
    --off-bg: #1c232e; --off-txt: #93a0b4;
    --sidebar: #060a10;
    --sidebar-txt: #b9c3d1;
    --sombra: none;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--texto);
    line-height: 1.5;
}
a { color: var(--primario); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--off-bg); padding: .1em .35em; border-radius: 5px; font-size: .9em; }
pre { background: var(--off-bg); padding: .8rem; border-radius: 8px; overflow-x: auto; font-size: .85rem; }

/* ---- Layout con sidebar ---- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 230px; background: var(--sidebar); color: var(--sidebar-txt);
    display: flex; flex-direction: column; padding: 1.2rem 0; flex-shrink: 0;
}
.marca { font-weight: 700; font-size: 1.15rem; padding: 0 1.2rem 1.2rem; color: #fff; }
.sidebar nav { display: flex; flex-direction: column; gap: 2px; }
.sidebar nav a {
    color: var(--sidebar-txt); padding: .6rem 1.2rem; border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,.05); text-decoration: none; }
.sidebar nav a.activo { background: rgba(59,130,246,.15); border-left-color: var(--primario); color: #fff; }
.sidebar-pie { margin-top: auto; padding: 1rem 1.2rem 0; display: flex; flex-direction: column; gap: .6rem; }
.usuario { font-size: .85rem; color: var(--texto-suave); }
.enlace-cuenta { font-size: .8rem; color: var(--sidebar-txt); opacity: .85; text-decoration: underline; }
.enlace-cuenta:hover { opacity: 1; }
.btn-tema, .btn-salir {
    background: transparent; border: 1px solid rgba(255,255,255,.2); color: var(--sidebar-txt);
    padding: .4rem .6rem; border-radius: 8px; cursor: pointer; font-size: .85rem; width: 100%;
}
.btn-salir:hover, .btn-tema:hover { background: rgba(255,255,255,.08); }
.contenido { flex: 1; padding: 1.6rem 2rem; max-width: 1100px; }

/* ---- Cabeceras ---- */
.cabecera { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.2rem; gap: 1rem; flex-wrap: wrap; }
.cabecera h1 { margin: 0; font-size: 1.5rem; }
.contador { color: var(--texto-suave); font-weight: 400; font-size: 1rem; }
.acciones-cab { display: flex; gap: .5rem; }

/* ---- Tarjetas ---- */
.tarjeta { background: var(--panel); border: 1px solid var(--borde); border-radius: var(--radio); padding: 1.2rem; box-shadow: var(--sombra); margin-bottom: 1.2rem; }
.tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1rem; margin-bottom: 1.2rem; }
.stat { text-align: center; }
.stat-num { font-size: 2rem; font-weight: 700; color: var(--primario); }
.stat-lbl { color: var(--texto-suave); font-size: .85rem; }
.pasos li { margin-bottom: .4rem; }
.vacio { text-align: center; padding: 2.5rem; }

/* ---- Avisos / flash ---- */
.flash, .aviso { padding: .8rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid transparent; }
.flash-success { background: var(--ok-bg); color: var(--ok-txt); }
.flash-error   { background: #fdeaea; color: var(--peligro); }
.flash-warning, .aviso-info { background: var(--warn-bg); color: var(--warn-txt); }
.aviso-info pre { background: rgba(0,0,0,.06); }

/* ---- Botones ---- */
.btn { display: inline-block; background: var(--panel); border: 1px solid var(--borde); color: var(--texto); padding: .5rem .9rem; border-radius: 8px; cursor: pointer; font-size: .9rem; }
.btn:hover { text-decoration: none; border-color: var(--primario); }
.btn-primario { background: var(--primario); color: var(--primario-txt); border-color: var(--primario); }
.btn-primario:hover { opacity: .92; }
.btn-suave { background: var(--off-bg); }
.btn-mini { padding: .3rem .55rem; font-size: .8rem; }
.btn-peligro { color: var(--peligro); border-color: var(--peligro); }
.btn-peligro:hover { background: var(--peligro); color: #fff; }
.inline { display: inline; }

/* ---- Formularios ---- */
.formulario { display: flex; flex-direction: column; gap: 1rem; max-width: 560px; }
.formulario label { display: flex; flex-direction: column; gap: .35rem; font-weight: 600; font-size: .9rem; }
.formulario label.check { flex-direction: row; align-items: center; gap: .5rem; font-weight: 400; }
.formulario input, .formulario textarea, .formulario select {
    padding: .55rem .7rem; border: 1px solid var(--borde); border-radius: 8px; font-size: .95rem;
    background: var(--panel); color: var(--texto); font-family: inherit;
}
.formulario small { color: var(--texto-suave); font-weight: 400; }
.obligatorio { color: var(--peligro); }
.form-acciones { display: flex; gap: .6rem; }

/* ---- Barra de búsqueda ---- */
.barra-busqueda { display: flex; gap: .5rem; margin-bottom: 1.2rem; }
.barra-busqueda input { flex: 1; padding: .55rem .7rem; border: 1px solid var(--borde); border-radius: 8px; background: var(--panel); color: var(--texto); }

/* ---- Tablas ---- */
.tabla-scroll { overflow-x: auto; }
.tabla { width: 100%; border-collapse: collapse; background: var(--panel); border-radius: var(--radio); overflow: hidden; box-shadow: var(--sombra); }
.tabla th, .tabla td { padding: .65rem .8rem; text-align: left; border-bottom: 1px solid var(--borde); font-size: .9rem; }
.tabla th { background: var(--off-bg); font-size: .8rem; text-transform: uppercase; letter-spacing: .02em; color: var(--texto-suave); }
.tabla tr:last-child td { border-bottom: none; }
.fila-baja { opacity: .55; }
.col-acciones { white-space: nowrap; display: flex; gap: .3rem; align-items: center; }

/* ---- Chips ---- */
.chip { display: inline-block; padding: .15rem .5rem; border-radius: 999px; font-size: .75rem; font-weight: 600; }
.chip-ok { background: var(--ok-bg); color: var(--ok-txt); }
.chip-warn { background: var(--warn-bg); color: var(--warn-txt); }
.chip-off { background: var(--off-bg); color: var(--off-txt); }

/* ---- Paginación ---- */
.paginacion { display: flex; gap: .3rem; margin-top: 1rem; flex-wrap: wrap; }
.paginacion a { padding: .4rem .7rem; border: 1px solid var(--borde); border-radius: 8px; background: var(--panel); }
.paginacion a.activa { background: var(--primario); color: #fff; border-color: var(--primario); }

/* ---- Pantalla de login ---- */
.pantalla-auth { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.caja-auth { background: var(--panel); border: 1px solid var(--borde); border-radius: 14px; padding: 2rem; width: 100%; max-width: 380px; box-shadow: var(--sombra); }
.marca-auth { font-size: 1.3rem; font-weight: 700; text-align: center; margin-bottom: 1.2rem; }
.caja-auth h1 { font-size: 1.15rem; margin: 0 0 1rem; }
.caja-auth .btn-primario { width: 100%; }

/* ---- Elementos de plantillas/campañas ---- */
.texto-suave { color: var(--texto-suave); }
.contador-sms { font-size: .85rem; color: var(--texto-suave); font-weight: 400; }
.contador-aviso { color: var(--warn-txt); font-weight: 600; }
.variables { display: flex; align-items: center; gap: .4rem; flex-wrap: wrap; font-size: .85rem; }
.variables .btn-mini { font-family: monospace; }
.mensaje-preview { background: var(--off-bg); padding: .8rem 1rem; border-radius: 8px; border-left: 3px solid var(--primario); white-space: pre-wrap; }
.formulario select { padding: .55rem .7rem; border: 1px solid var(--borde); border-radius: 8px; background: var(--panel); color: var(--texto); font-size: .95rem; font-family: inherit; }

/* ---- Saldo y formularios en linea (admin usuarios) ---- */
.saldo-pie { font-weight: 700; color: #fff; background: rgba(59,130,246,.2); padding: .3rem .6rem; border-radius: 8px; text-align: center; }
.inline-form { display: inline-flex; gap: .25rem; align-items: center; }
.inline-form input { padding: .3rem .4rem; border: 1px solid var(--borde); border-radius: 6px; background: var(--panel); color: var(--texto); }

/* ---- Filtros y registro de envios (admin) ---- */
.filtros { display: flex; flex-wrap: wrap; gap: .8rem; align-items: flex-end; max-width: none; }
.filtros label { display: flex; flex-direction: column; gap: .35rem; font-weight: 600; font-size: .85rem; }
.filtros input, .filtros select {
    padding: .45rem .6rem; border: 1px solid var(--borde); border-radius: 8px;
    background: var(--panel); color: var(--texto); font-size: .9rem; font-family: inherit;
}
.celda-texto { max-width: 380px; white-space: pre-wrap; word-break: break-word; }

/* ---- Claves de API y documentacion ---- */
.codigo { white-space: pre-wrap; word-break: break-word; line-height: 1.45; }
.clave-nueva {
    background: var(--ok-bg); color: var(--ok-txt); border: 1px solid var(--ok-txt);
    border-radius: var(--radio); padding: 1rem 1.2rem; margin-bottom: 1.2rem;
}
.clave-nueva h2 { margin: 0 0 .4rem; font-size: 1.05rem; }
.clave-nueva p { margin: .3rem 0; color: var(--texto); }
.clave-caja { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; margin-top: .6rem; }
.clave-caja code {
    background: var(--panel); color: var(--texto); border: 1px solid var(--borde);
    padding: .5rem .7rem; border-radius: 8px; font-size: .95rem; word-break: break-all;
}

/* ---- Responsive ---- */
@media (max-width: 720px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; align-items: center; padding: .6rem 1rem; }
    .sidebar nav { flex-direction: row; }
    .sidebar-pie { margin: 0 0 0 auto; flex-direction: row; align-items: center; padding: 0; }
    .sidebar-pie form { margin: 0; }
    .contenido { padding: 1rem; }
}