/* HerramientasYa — hoja de estilos base (mobile-first, sin frameworks, sin peticiones externas) */

:root{
  --color-primary:#2563eb;
  --color-primary-dark:#1d4ed8;
  --color-accent:#10b981;
  --color-text:#1e293b;
  --color-muted:#64748b;
  --color-bg:#ffffff;
  --color-bg-soft:#f1f5f9;
  --color-border:#e2e8f0;
  --radius:12px;
}

*{box-sizing:border-box}

body{
  font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--color-text);
  margin:0;
  line-height:1.6;
  background:var(--color-bg);
}

main{display:block}

.container{max-width:1100px;margin:0 auto;padding:0 1rem}

/* Header */
.site-header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--color-border);z-index:10}
.header-inner{display:flex;justify-content:space-between;align-items:center;padding:.8rem 1rem}
.brand{font-weight:800;font-size:1.25rem;color:var(--color-primary);text-decoration:none}
.main-nav a{margin-left:1rem;color:var(--color-text);text-decoration:none;font-weight:600}
.main-nav a:hover{color:var(--color-primary)}

/* Hero */
.hero{background:linear-gradient(180deg,#eff6ff,#f8fafc);padding:3rem 0;text-align:center}
.hero h1{font-size:clamp(1.8rem,5vw,2.6rem);margin:0 0 .5rem}
.lead{color:var(--color-muted);font-size:1.1rem;max-width:640px;margin:0 auto}

/* Secciones */
.section{padding:2.5rem 0}
.section-title{font-size:1.5rem;margin:0 0 1rem}

/* Grid de herramientas */
.grid-tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;padding:1rem 0}
.tool-card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:1.25rem;transition:transform .15s,box-shadow .15s}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(37,99,235,.12)}
.tool-card h2{font-size:1.15rem;margin:0 0 .4rem}
.tool-card p{color:var(--color-muted);font-size:.95rem;margin:0 0 1rem}

/* Botones */
.btn{display:inline-block;background:var(--color-primary);color:#fff;text-decoration:none;padding:.65rem 1.25rem;border-radius:8px;font-weight:700;border:none;cursor:pointer}
.btn:hover{background:var(--color-primary-dark)}
.btn-outline{background:#fff;color:var(--color-primary);border:2px solid var(--color-primary)}
.btn-outline:hover{background:var(--color-primary);color:#fff}

/* Formularios */
.tool-form{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:1.5rem;max-width:640px}
.form-row{display:grid;gap:1rem}
@media(min-width:720px){.form-row{grid-template-columns:1fr 1fr}}
.form-group{margin-bottom:1rem}
.form-group label{display:block;font-weight:600;margin-bottom:.35rem;font-size:.95rem}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:.7rem;border:1px solid var(--color-border);border-radius:8px;font-size:1rem;font-family:inherit}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:2px solid var(--color-primary);border-color:var(--color-primary)}
input[type=range]{accent-color:var(--color-primary)}
.checkbox-row{display:flex;align-items:center;gap:.5rem;margin-bottom:.5rem}
.checkbox-row input{width:auto}

/* Resultados */
.result-box{background:var(--color-bg-soft);border-left:4px solid var(--color-primary);border-radius:8px;padding:1.25rem;margin:1.5rem 0;max-width:640px}
.result-value{font-size:2rem;font-weight:800;color:var(--color-primary)}
.result-list{margin:.75rem 0 0;padding:0;list-style:none}
.result-list li{padding:.35rem 0;border-bottom:1px dashed var(--color-border)}
.result-list strong{color:var(--color-text)}

/* Badges */
.badge-ok,.badge-warn,.badge-bad{display:inline-block;padding:.25rem .8rem;border-radius:999px;font-weight:700;font-size:.9rem}
.badge-ok{background:#dcfce7;color:#166534}
.badge-warn{background:#fef3c7;color:#92400e}
.badge-bad{background:#fee2e2;color:#991b1b}

/* FAQ */
.faq{max-width:720px}
.faq-item{border:1px solid var(--color-border);border-radius:8px;margin-bottom:.6rem;background:#fff}
.faq-item summary{padding:1rem;cursor:pointer;font-weight:700}
.faq-item p{padding:0 1rem 1rem;margin:0;color:var(--color-muted)}

/* Tablas */
.table-wrap{overflow-x:auto;max-width:640px}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:.6rem;text-align:left;border-bottom:1px solid var(--color-border)}
th{background:var(--color-bg-soft)}

/* Espacios publicitarios (reservados) */
.ad-slot{min-height:90px;background:#f8fafc;border:1px dashed var(--color-border);border-radius:8px;margin:2rem auto;max-width:728px}

/* Footer */
.site-footer{background:#0f172a;color:#cbd5e1;padding:2rem 0;margin-top:2rem}
.footer-tag{margin:0 0 .75rem}
.footer-nav a{color:#cbd5e1;margin-right:1rem;text-decoration:none;font-size:.9rem}
.footer-nav a:hover{text-decoration:underline}
.footer-copy{font-size:.85rem;color:#94a3b8;margin-top:1rem}

/* Utilidades */
.note{font-size:.85rem;color:var(--color-muted)}
.error{color:#dc2626;font-size:.9rem;font-weight:600}