/* ============================================================================
   Herramientas — MF Tech AR
   Tarjetas de acceso, modal y componentes internos de cada calculadora.
   ========================================================================== */

/* ---------- Grilla de herramientas ---------- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.tool {
  font: inherit;
  text-align: left;
  color: var(--txt);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}
.tool::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 150px at 15% 0%, rgba(64, 224, 208, 0.1), transparent 70%);
  opacity: 0;
  transition: opacity 0.28s ease;
  pointer-events: none;
}
.tool:hover {
  transform: translateY(-4px);
  border-color: rgba(64, 224, 208, 0.38);
  background: var(--surface-2);
}
.tool:hover::after { opacity: 1; }
.tool:focus-visible { outline: 2px solid var(--turq); outline-offset: 3px; }
.tool-ico {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.tool-ico svg { width: 25px; height: 25px; }
.tool h3 { font-size: 1.04rem; margin: 0; }
.tool p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--txt-soft);
  font-weight: 300;
  line-height: 1.5;
  flex: 1;
}
.tool-go {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--turq);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.tool-go::after {
  content: "\2192";
  transition: transform 0.2s ease;
}
.tool:hover .tool-go::after { transform: translateX(3px); }
.tools-note {
  text-align: center;
  font-size: 0.9rem;
  color: var(--txt-dim);
  margin-top: 26px;
}
.tools-note a { color: var(--turq); font-weight: 600; }

/* ---------- Modal ---------- */
.tool-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(3, 12, 20, 0.82);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  padding: 20px;
  overflow-y: auto;
}
.tool-modal[hidden] { display: none; }
.tool-modal-box {
  position: relative;
  width: min(620px, 100%);
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: linear-gradient(165deg, #0d2b3f, #081a29);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: clamp(24px, 4vw, 34px);
  box-shadow: var(--shadow);
  animation: toolIn 0.24s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}
@keyframes toolIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
.tool-modal-box h3 {
  font-size: 1.3rem;
  margin: 0 0 6px;
  padding-right: 40px;
}
.tool-modal-x {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--txt-soft);
  display: grid;
  place-items: center;
  cursor: pointer;
  padding: 0;
}
.tool-modal-x:hover { color: #fff; border-color: rgba(255, 255, 255, 0.3); }
.tool-modal-x svg { width: 17px; height: 17px; }

/* ---------- Componentes internos ---------- */
.tw-desc {
  color: var(--txt-soft);
  font-size: 0.94rem;
  font-weight: 300;
  margin: 0 0 18px;
}
.tw-form { display: grid; gap: 13px; margin-bottom: 18px; }
.tw-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--txt-soft);
  margin: 0;
}
.tw-form select,
.tw-form input[type="text"] {
  width: 100%;
  background: #0a1c29;
  color: var(--txt);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}
.tw-form select:focus { outline: 2px solid var(--turq); outline-offset: 1px; }
.tw-form input[type="range"] { width: 100%; accent-color: var(--turq); }
.tw-q {
  flex-direction: row !important;
  align-items: flex-start;
  gap: 9px !important;
  color: var(--txt-soft);
  font-size: 0.92rem;
}
.tw-q input { width: 17px; height: 17px; flex: 0 0 auto; margin-top: 2px; accent-color: var(--turq); }
.tw-block { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.tw-hint { font-size: 0.84rem; color: var(--txt-dim); }
.tw-h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--txt-dim);
  margin: 18px 0 10px;
}
.tw-list { display: grid; gap: 9px; }
.tw-list li {
  font-size: 0.9rem;
  color: var(--txt-soft);
  font-weight: 300;
  padding-left: 18px;
  position: relative;
  line-height: 1.5;
}
.tw-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--turq);
}
.tw-out { margin-top: 18px; }
.tw-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}
.tw-metric {
  background: rgba(0, 0, 0, 0.26);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  text-align: center;
}
.tw-metric b {
  display: block;
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tw-metric span { font-size: 0.78rem; color: var(--txt-dim); }
.tw-verdict {
  border-radius: var(--radius-sm);
  padding: 15px 17px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--turq);
}
.tw-verdict b { display: block; margin-bottom: 4px; font-size: 1rem; }
.tw-verdict p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--txt-soft);
  font-weight: 300;
  line-height: 1.5;
}
.tw-verdict.ok { border-left-color: #35e0a1; }
.tw-verdict.warn { border-left-color: #ffd166; }
.tw-verdict.err { border-left-color: #ff6b6b; }
.tw-pass {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #0a1c29;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 13px 15px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.tw-pass code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.95rem;
  color: var(--turq);
  word-break: break-all;
  flex: 1;
  min-width: 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 780px) {
  .tools-grid { grid-template-columns: 1fr; }
  .tool-modal { padding: 12px; align-items: flex-start; }
  .tool-modal-box { max-height: none; }
}