:root {
  --ink: #1b1d1f;
  --muted: #646b73;
  --line: #d9dedc;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --panel-soft: #f0f6f4;
  --teal: #0f766e;
  --teal-dark: #0b4f4a;
  --coral: #c2412d;
  --amber: #a16207;
  --violet: #6d4c9c;
  --green: #3f7a3f;
  --shadow: 0 18px 45px rgba(27, 29, 31, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(16px, 4vw, 56px);
  border-bottom: 1px solid var(--line);
  background: rgba(251, 250, 247, 0.94);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  min-width: 220px;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.main-nav a {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  border-color: var(--line);
  color: var(--ink);
  background: #fff;
  outline: none;
}

main {
  width: min(1440px, 100%);
  margin: 0 auto;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 28px;
  padding: 42px clamp(16px, 4vw, 56px) 24px;
}

.workspace-intro {
  max-width: 850px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--coral);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 16px;
  font-size: 4.4rem;
  line-height: 1.02;
}

h2 {
  margin-bottom: 8px;
  font-size: 2rem;
  line-height: 1.18;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.02rem;
}

.intro-copy {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.command-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  align-self: end;
}

.metric {
  min-height: 124px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.metric span {
  display: block;
  margin-bottom: 12px;
  color: var(--teal-dark);
  font-size: 2.1rem;
  font-weight: 800;
  line-height: 1;
}

.metric small {
  color: var(--muted);
  font-weight: 700;
}

.tool-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  padding: 16px clamp(16px, 4vw, 56px) 44px;
}

.filters {
  position: sticky;
  top: 88px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 18px;
  box-shadow: var(--shadow);
}

.filters-header,
.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.filters-header h2,
.section-heading h2 {
  margin-bottom: 0;
}

.section-heading > p,
#result-count {
  color: var(--muted);
  font-weight: 700;
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 14px;
}

.field span {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
}

.field input:focus,
.field select:focus,
button:focus-visible {
  border-color: var(--teal);
  outline: 3px solid rgba(15, 118, 110, 0.16);
}

.ghost-button,
.card-button,
.save-button,
.close-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
}

.ghost-button {
  min-height: 38px;
  padding: 8px 12px;
}

.ghost-button:hover,
.card-button:hover,
.save-button:hover,
.close-button:hover {
  border-color: var(--teal);
  color: var(--teal-dark);
}

.saved-box {
  margin-top: 18px;
  padding: 14px;
  border-left: 4px solid var(--amber);
  background: #fff8e8;
}

.saved-box strong {
  display: block;
  margin-bottom: 4px;
}

.saved-box p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.library {
  min-width: 0;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}

.method-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 18px;
  box-shadow: 0 10px 26px rgba(27, 29, 31, 0.05);
}

.method-card[data-group="Investigación"] {
  border-top: 5px solid var(--teal);
}

.method-card[data-group="Arquitectura"] {
  border-top: 5px solid var(--amber);
}

.method-card[data-group="Evaluación"] {
  border-top: 5px solid var(--coral);
}

.method-card[data-group="Medición"] {
  border-top: 5px solid var(--violet);
}

.method-card[data-group="Estrategia"] {
  border-top: 5px solid var(--green);
}

.method-card[data-group="Diseño"] {
  border-top: 5px solid #4f6f9f;
}

.method-card h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.tag {
  border-radius: 999px;
  background: var(--panel-soft);
  color: var(--teal-dark);
  padding: 5px 9px;
  font-size: 0.78rem;
  font-weight: 800;
}

.summary {
  color: var(--muted);
  font-size: 0.95rem;
}

.card-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 14px 0;
}

.card-meta span {
  min-height: 56px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.card-meta strong {
  display: block;
  color: var(--ink);
}

.card-actions {
  display: flex;
  gap: 8px;
  align-self: end;
}

.card-button,
.save-button {
  min-height: 42px;
  padding: 10px 12px;
}

.card-button {
  flex: 1;
  background: var(--ink);
  color: #fff;
}

.card-button:hover {
  border-color: var(--ink);
  color: #fff;
  background: var(--teal-dark);
}

.save-button[aria-pressed="true"] {
  border-color: var(--amber);
  background: #fff2c5;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 26px;
  color: var(--muted);
  font-weight: 700;
  text-align: center;
}

.recommender {
  margin: 0 clamp(16px, 4vw, 56px) 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 24px;
  box-shadow: var(--shadow);
}

.route,
.sources {
  margin: 0;
  padding: 44px clamp(16px, 4vw, 56px);
  border-top: 1px solid var(--line);
}

.route {
  background: #fff;
}

.sources {
  background: var(--panel-soft);
}

.recommendation-form {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.recommendation-results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.recommendation {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf7;
  padding: 16px;
}

.recommendation strong {
  display: block;
  margin-bottom: 8px;
}

.recommendation p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.timeline article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fbfaf7;
}

.timeline span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--teal-dark);
  color: #fff;
  font-weight: 800;
}

.timeline p,
.principles-panel li {
  color: var(--muted);
}

.principles-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.principles-panel ul {
  margin: 0;
  padding-left: 18px;
}

.principles-panel li + li {
  margin-top: 8px;
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.source-grid a {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf7;
  padding: 14px;
  color: var(--teal-dark);
  font-weight: 800;
  text-decoration: none;
}

.source-grid a:hover,
.source-grid a:focus-visible {
  border-color: var(--teal);
  background: var(--panel-soft);
  outline: none;
}

.method-dialog {
  width: min(860px, calc(100% - 28px));
  max-height: 88vh;
  border: 0;
  border-radius: 8px;
  padding: 0;
  color: var(--ink);
  box-shadow: 0 28px 80px rgba(27, 29, 31, 0.26);
}

.method-dialog::backdrop {
  background: rgba(27, 29, 31, 0.42);
}

.close-button {
  position: sticky;
  top: 0;
  float: right;
  margin: 14px 14px 0 0;
  min-height: 40px;
  padding: 8px 12px;
  z-index: 2;
}

.dialog-body {
  padding: 30px;
}

.dialog-body .tag-row {
  margin: 14px 0 18px;
}

.dialog-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.dialog-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #fbfaf7;
}

.dialog-section ul,
.dialog-section ol {
  margin-bottom: 0;
  padding-left: 20px;
}

.dialog-section li + li {
  margin-top: 8px;
}

.site-footer {
  padding: 22px clamp(16px, 4vw, 56px) 36px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 1060px) {
  h1 {
    font-size: 3.2rem;
  }

  .workspace,
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .filters {
    position: static;
  }

  .command-panel,
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 760px) {
  h1 {
    font-size: 2.3rem;
  }

  h2 {
    font-size: 1.55rem;
  }

  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .workspace {
    padding-top: 28px;
  }

  .command-panel,
  .recommendation-form,
  .timeline,
  .principles-panel,
  .dialog-grid {
    grid-template-columns: 1fr;
  }

  .method-card {
    min-height: 0;
  }

  .card-actions {
    flex-direction: column;
  }

  .recommender,
  .route,
  .sources {
    padding: 18px;
  }
}