/* ==========================================================================
   EM12 · Trauma3D — Hoja de estilos principal
   ========================================================================== */

:root {
  --color-primary: #0b3d62;
  --color-primary-dark: #082c47;
  --color-primary-light: #14568c;
  --color-accent: #e8622c;
  --color-accent-dark: #c94e1e;
  --color-bg: #f6f8fa;
  --color-surface: #ffffff;
  --color-text: #1f2933;
  --color-muted: #5b6b79;
  --color-border: #e2e8ef;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 18px rgba(11, 61, 98, 0.08);
  --shadow-hover: 0 10px 28px rgba(11, 61, 98, 0.14);
  --max-width: 1160px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent);
}

h1, h2, h3, h4 {
  line-height: 1.25;
  color: var(--color-primary-dark);
  margin-top: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 10px;
}

.section {
  padding: 72px 0;
}

.section--muted {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-head {
  max-width: 680px;
  margin: 0 0 40px;
}

.section-head p {
  color: var(--color-muted);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--color-primary-dark);
  font-size: 1.05rem;
}

.brand img {
  height: 42px;
  width: auto;
}

.brand small {
  display: block;
  font-weight: 500;
  font-size: 0.72rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.94rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  text-align: center;
}

.nav a:hover,
.nav a.is-active {
  color: var(--color-primary);
  background: #eef4f9;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-primary-dark);
  border-radius: 2px;
}

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary) 60%, var(--color-primary-light));
  color: #fff;
  padding: 96px 0 88px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  color: #fff;
  font-size: clamp(2rem, 4vw, 2.9rem);
  margin-bottom: 18px;
}

.hero p.lead {
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.1rem;
  max-width: 52ch;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.hero-badge {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-figure {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  padding: 28px;
}

.hero-figure dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 16px;
  margin: 0;
}

.hero-figure dt {
  font-weight: 700;
  color: #fff;
}

.hero-figure dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  color: #fff;
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn-outline.btn-dark {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline.btn-dark:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-3d {
  background: #1f9d55;
  border-color: #1f9d55;
  color: #fff;
}

.btn-3d:hover {
  background: #17803f;
  border-color: #17803f;
  color: #fff;
}

/* ---------- Cards / grids ---------- */

.grid {
  display: grid;
  gap: 24px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.card .icon {
  width: 46px;
  height: 46px;
  border-radius: 10px;
  background: #eef4f9;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}

.card h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.card p {
  color: var(--color-muted);
  margin-bottom: 0;
}

.card-link {
  display: inline-block;
  margin-top: 14px;
  font-weight: 700;
  font-size: 0.9rem;
}

/* ---------- Team ---------- */

.team-member {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}

.team-member .avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 auto 14px;
}

.team-member h4 {
  margin: 0 0 4px;
  font-size: 0.98rem;
}

.team-member span {
  font-size: 0.82rem;
  color: var(--color-muted);
}

.team-member .member-orcid {
  margin: 8px 0 0;
  font-size: 0.74rem;
  color: var(--color-muted);
  opacity: 0.8;
}

.team-member .member-orcid a {
  color: inherit;
}

.team-lead {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 36px;
}

.team-lead .avatar {
  width: 88px;
  height: 88px;
  font-size: 1.4rem;
}

.team-lead-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--color-muted);
}

/* ---------- Lists / definitions ---------- */

.info-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}

.info-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.info-list strong {
  color: var(--color-primary-dark);
}

/* ---------- Tag / pill ---------- */

.tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  background: #eef4f9;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.tag--accent {
  background: #fdece3;
  color: var(--color-accent-dark);
}

/* ---------- Placeholder callout ---------- */

.callout {
  border: 1px dashed #c9d3dc;
  background: #fbfcfd;
  border-radius: var(--radius);
  padding: 18px 20px;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.callout strong {
  color: var(--color-primary-dark);
}

/* ---------- Breadcrumb / page header ---------- */

.page-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 52px 0 40px;
}

.page-header .eyebrow {
  margin-bottom: 8px;
}

.page-header p {
  color: var(--color-muted);
  max-width: 68ch;
}

/* ---------- Anchor sub-nav (Proyecto Trauma3D) ---------- */

.subnav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.subnav a {
  font-size: 0.86rem;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: 999px;
  background: #eef4f9;
  color: var(--color-primary);
}

.subnav a:hover {
  background: var(--color-primary);
  color: #fff;
}

.subsection {
  padding: 56px 0;
  border-top: 1px solid var(--color-border);
}

.subsection:first-of-type {
  border-top: none;
}

/* ---------- Publications ---------- */

.pub-year {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin: 40px 0 16px;
}

.pub-year:first-child {
  margin-top: 0;
}

.pub-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-item p {
  margin: 4px 0 0;
  color: var(--color-muted);
  font-size: 0.92rem;
}

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-form {
  display: grid;
  gap: 16px;
}

.contact-form label {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-primary-dark);
  display: block;
  margin-bottom: 6px;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--color-surface);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  outline: 2px solid var(--color-primary-light);
  outline-offset: 1px;
}

.form-section-title {
  margin: 8px 0 -4px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 1rem;
  color: var(--color-primary-dark);
}

.contact-form > .form-section-title:first-child {
  padding-top: 0;
  border-top: none;
}

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

@media (max-width: 640px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-hint {
  margin: 4px 0 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.checkbox-group {
  display: grid;
  gap: 8px;
}

.checkbox-group label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-weight: 400;
  font-size: 0.92rem;
  color: var(--color-text);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin-top: 3px;
  flex-shrink: 0;
}

.consent-field label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 400;
  font-size: 0.88rem;
  color: var(--color-text);
}

.consent-field input[type="checkbox"] {
  width: auto;
  margin-top: 3px;
  flex-shrink: 0;
}

.privacy-note {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-top: 32px;
}

.privacy-note h3 {
  font-size: 0.92rem;
  color: var(--color-primary-dark);
  margin-top: 0;
}

.contact-form button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.hp-field {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.form-status {
  min-height: 1.2em;
  font-size: 0.88rem;
  margin: 0;
}

.form-status.is-success {
  color: #1f7a4d;
  font-weight: 600;
}

.form-status.is-error {
  color: #b3261e;
  font-weight: 600;
}

/* ---------- Exercise pages ---------- */

.exercise-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
  margin-top: 18px;
  font-size: 0.88rem;
  color: var(--color-muted);
}

.difficulty {
  display: inline-flex;
  gap: 3px;
  vertical-align: middle;
}

.difficulty span {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--color-border);
  display: inline-block;
}

.difficulty span.is-filled {
  background: var(--color-accent);
}

.exercise-hero {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  margin-top: 28px;
}

.exercise-toc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 32px 0;
}

.exercise-toc h2 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.exercise-toc ol {
  columns: 2;
  gap: 24px;
  margin: 0;
  padding-left: 20px;
  font-size: 0.92rem;
}

.exercise-toc li {
  margin-bottom: 6px;
  break-inside: avoid;
}

.exercise-toc a {
  color: var(--color-text);
}

.exercise-toc a:hover {
  color: var(--color-primary);
}

.step-block {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  scroll-margin-top: 90px;
}

.step-block:first-of-type {
  border-top: none;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  margin-right: 10px;
}

.step-block h2 {
  display: flex;
  align-items: center;
  font-size: 1.25rem;
  margin-bottom: 14px;
}

.step-list {
  margin: 14px 0;
  padding-left: 22px;
}

.step-list li {
  margin-bottom: 8px;
  color: var(--color-text);
}

.substep-list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  display: grid;
  gap: 10px;
}

.substep-list li {
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.step-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.step-images figure {
  margin: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.step-images img {
  width: 100%;
  display: block;
}

.step-images figcaption {
  padding: 8px 12px;
  font-size: 0.78rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
}

.step-images.single {
  grid-template-columns: minmax(280px, 560px);
}

.note-box {
  background: #eef4f9;
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  margin: 16px 0;
}

.tip-box {
  background: #fdece3;
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 12px 16px;
  font-size: 0.9rem;
  color: var(--color-accent-dark);
  margin: 16px 0;
}

.result-box {
  background: #f2f8f4;
  border: 1px solid #cfe6d6;
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin-top: 16px;
}

.result-box strong {
  color: #1f7a4d;
}

.exercise-nav {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 32px 0;
}

@media (max-width: 640px) {
  .exercise-toc ol {
    columns: 1;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.78);
  padding: 56px 0 28px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 0.92rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  font-size: 0.9rem;
}

.footer-grid a {
  color: rgba(255, 255, 255, 0.78);
}

.footer-grid a:hover {
  color: #fff;
}

.footer-brand p {
  font-size: 0.88rem;
  max-width: 34ch;
  color: rgba(255, 255, 255, 0.68);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- Responsive ---------- */

@media (max-width: 880px) {
  .hero .container {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-2,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .team-lead {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .team-lead-meta {
    justify-content: center;
  }
}

@media (max-width: 760px) {
  .nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 10px 24px 20px;
    display: none;
    box-shadow: var(--shadow);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 12px 8px;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 52px 0;
  }
}

/* ---------- Admin panel: casos de biomodelos ---------- */

.subnav a.is-active-filter {
  background: var(--color-primary);
  color: #fff;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.admin-table th {
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.admin-table tbody tr:hover {
  background: #f5f9fc;
}

.admin-table tbody tr:last-child td {
  border-bottom: none;
}

.status-badge {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.status-recibido      { background: #eef4f9; color: #0b3d62; }
.status-en_revision   { background: #fdf3e3; color: #92670c; }
.status-en_proceso    { background: #fdece3; color: #c94e1e; }
.status-listo         { background: #e9f5ee; color: #1f7a4d; }
.status-entregado     { background: #e6f6ea; color: #157347; }
.status-cerrado       { background: #eceff1; color: #5b6b79; }

.case-timeline {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 24px 0;
}

.case-timeline .step {
  flex: 1;
  min-width: 110px;
  text-align: center;
  padding: 12px 8px;
  border-bottom: 4px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.case-timeline .step.is-done {
  border-bottom-color: var(--color-primary);
  color: var(--color-primary);
}

.case-timeline .step.is-current {
  border-bottom-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.message-thread {
  display: grid;
  gap: 14px;
  margin: 20px 0;
}

.message-bubble {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  max-width: 85%;
}

.message-bubble.is-solicitante {
  background: #eef4f9;
  margin-right: auto;
}

.message-bubble.is-equipo {
  background: #fdf3ea;
  margin-left: auto;
}

.message-bubble.is-interno {
  background: #fdf6e3;
  border-style: dashed;
}

.message-bubble .meta {
  font-size: 0.76rem;
  color: var(--color-muted);
  margin-bottom: 4px;
  font-weight: 700;
}

.file-list {
  list-style: none;
  padding: 0;
  margin: 16px 0;
  display: grid;
  gap: 10px;
}

.file-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.upload-progress {
  margin-top: 10px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-border);
  overflow: hidden;
  display: none;
}

.upload-progress .bar {
  height: 100%;
  width: 0%;
  background: var(--color-accent);
  transition: width 0.2s ease;
}