/* =================================================================
   ESTILOS COMPARTIDOS — Suite de calculadoras
   Dark mode · azul oscuro + verde · responsive
   ================================================================= */

:root {
  --bg:          #0a1628;
  --bg-panel:    #11233f;
  --bg-input:    #0d1b30;
  --border:      #1e3a5f;
  --text:        #e6eefc;
  --text-dim:    #8aa0c0;
  --accent:      #2563eb;
  --accent-hover:#1d4ed8;
  --green:       #22c55e;
  --green-soft:  rgba(34,197,94,0.12);
  --red:         #ef4444;
  --shadow:      0 8px 30px rgba(0,0,0,0.4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(160deg, var(--bg) 0%, #06101f 100%);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ====== Barra de navegación superior ====== */
.topbar {
  border-bottom: 1px solid var(--border);
  background: rgba(10,22,40,0.85);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 50;
}
.topbar .inner {
  max-width: 1080px; margin: 0 auto; padding: 14px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand {
  font-weight: 700; font-size: 1.15rem; text-decoration: none;
  display: flex; align-items: center; gap: 10px; color: var(--text);
}
.brand .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--green));
  display: grid; place-items: center; font-size: 1rem;
}
.brand span.name {
  background: linear-gradient(90deg, #60a5fa, #22c55e);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.topnav { display: flex; gap: 6px; flex-wrap: wrap; }
.topnav a {
  color: var(--text-dim); text-decoration: none; font-size: 0.9rem; font-weight: 600;
  padding: 8px 12px; border-radius: 8px; transition: all 0.2s;
}
.topnav a:hover { color: var(--text); background: var(--bg-panel); }
.topnav a.active { color: #fff; background: var(--accent); }

/* ====== Hero / cabecera de página ====== */
.page-head { text-align: center; padding: 38px 0 24px; }
.page-head h1 {
  font-size: 2rem; font-weight: 700; letter-spacing: -0.5px;
  background: linear-gradient(90deg, #60a5fa, #22c55e);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.page-head p { color: var(--text-dim); margin-top: 8px; max-width: 620px; margin-left: auto; margin-right: auto; }

/* ====== Home: tarjetas de calculadoras ====== */
.cards { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; padding: 10px 0 40px; }
@media (max-width: 820px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 540px) { .cards { grid-template-columns: 1fr; } }

.tool-card {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 22px; text-decoration: none; color: var(--text);
  transition: transform 0.18s, border-color 0.18s, box-shadow 0.18s;
  display: flex; flex-direction: column; gap: 10px; position: relative; overflow: hidden;
}
.tool-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow); }
.tool-card .ico { font-size: 1.8rem; }
.tool-card h3 { font-size: 1.05rem; }
.tool-card p { font-size: 0.85rem; color: var(--text-dim); }
.tool-card.soon { opacity: 0.6; pointer-events: none; }
.badge {
  position: absolute; top: 14px; right: 14px; font-size: 0.68rem; font-weight: 700;
  background: var(--bg-input); border: 1px solid var(--border); color: var(--text-dim);
  padding: 3px 8px; border-radius: 99px; text-transform: uppercase; letter-spacing: 0.5px;
}

/* ====== Tarjetas / paneles genéricos ====== */
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; padding-bottom: 24px; }
@media (max-width: 820px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--bg-panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 22px; box-shadow: var(--shadow);
}
.card h2 { font-size: 1.05rem; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.card h2 .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

/* ====== Inputs ====== */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 0.82rem; color: var(--text-dim); margin-bottom: 6px; font-weight: 500; }
.input-wrap { position: relative; display: flex; align-items: center; }
input[type="number"], input[type="text"], select {
  width: 100%; padding: 11px 12px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: 10px; color: var(--text);
  font-size: 0.95rem; transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,99,235,0.2); }
.suffix { position: absolute; right: 12px; color: var(--text-dim); font-size: 0.85rem; pointer-events: none; }
input.has-suffix { padding-right: 32px; }
.row { display: flex; gap: 12px; }
.row .field { flex: 1; }

.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; margin-bottom: 6px; }
.seg button { background: var(--bg-input); border: none; color: var(--text-dim); padding: 5px 12px; font-size: 0.78rem; cursor: pointer; font-weight: 600; }
.seg button.active { background: var(--accent); color: #fff; }

/* ====== Resultados ====== */
.results { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 18px; }
@media (max-width: 480px) { .results { grid-template-columns: 1fr; } }
.result-box { background: var(--bg-input); border: 1px solid var(--border); border-radius: 12px; padding: 14px; }
.result-box .lbl { font-size: 0.78rem; color: var(--text-dim); margin-bottom: 4px; }
.result-box .val { font-size: 1.35rem; font-weight: 700; }
.result-box.positive { border-color: rgba(34,197,94,0.4); background: var(--green-soft); }
.result-box.positive .val { color: var(--green); }
.result-box.negative .val { color: var(--red); }

.chart-box { margin-top: 8px; position: relative; height: 280px; }
.note { font-size: 0.78rem; color: var(--text-dim); margin-top: 14px; line-height: 1.6; }

/* ====== Pie ====== */
footer { border-top: 1px solid var(--border); padding: 24px 0; text-align: center; color: var(--text-dim); font-size: 0.82rem; }
footer .disclaimer { max-width: 720px; margin: 0 auto 8px; line-height: 1.6; }