/* =========================================================
   EASYbot Platform - Global Stylesheet
   Versión base limpia para toda la web (ES / EN)
   ========================================================= */

:root {
  --color-bg: #0b1220;
  --color-bg-soft: #111a2b;
  --color-surface: #ffffff;
  --color-surface-soft: #f4f7fb;
  --color-surface-alt: #eaf0f8;
  --color-border: #d8e0ea;
  --color-text: #16202b;
  --color-text-soft: #4f6176;
  --color-heading: #0c1726;
  --color-primary: #005ea8;
  --color-primary-dark: #00467d;
  --color-primary-soft: #d9ebfa;
  --color-accent: #2c7ec5;
  --color-white: #ffffff;
  --color-success: #1f8a5b;
  --color-header-top: #5a697d;
  --color-header-bottom: #475465;
  --color-sidebar-top: #1f4e79;
  --color-sidebar-bottom: #173a5a;
  --shadow-sm: 0 4px 12px rgba(10, 24, 43, 0.06);
  --shadow-md: 0 10px 30px rgba(10, 24, 43, 0.10);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --header-height: 88px;
  --sidebar-width: 280px;
  --content-max: 1380px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --font-sans: Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --transition-fast: 160ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: linear-gradient(180deg, #f3f7fc 0%, #edf3f9 100%);
}

img,
picture,
svg,
video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
}

button,
input,
textarea,
select {
  font: inherit;
}

ul,
ol {
  padding-left: 1.25rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-4);
  color: var(--color-heading);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(1.5rem, 1.1rem + 1.3vw, 2.2rem);
}

h2 {
  font-size: clamp(1.7rem, 1.2rem + 1.4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.15rem, 1rem + 0.5vw, 1.45rem);
}

h4 {
  font-size: 1.05rem;
}

p {
  margin: 0 0 var(--space-4);
}

.lead {
  font-size: 1.05rem;
  color: var(--color-text-soft);
}

.small-text {
  font-size: 0.925rem;
  color: var(--color-text-soft);
}

.eyebrow,
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: var(--space-4);
  font-size: 0.78rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.section-tag::before,
.eyebrow::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 0 0 5px rgba(0, 94, 168, 0.10);
}

.page-shell {
  min-height: 100vh;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: grid;
  grid-template-columns: var(--sidebar-width) auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
  padding: 0;
  background: linear-gradient(180deg, var(--color-header-top) 0%, var(--color-header-bottom) 100%);
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(14px);
}

.brand-wrap {
  display: contents;
}

.brand-logo {
  grid-column: 1;
  width: auto;
  height: 52px;
  object-fit: contain;
  justify-self: center;
}

.brand-block {
  grid-column: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.brand-block h1,
.topbar h1 {
  margin-bottom: 0;
  color: var(--color-white);
}

.topbar .eyebrow {
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: var(--space-2);
}

.topbar .eyebrow::before {
  box-shadow: none;
}

.top-links {
  grid-column: 3;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  flex-wrap: wrap;
  min-width: 0;
}

.top-links a {
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}

.top-links a:hover,
.top-links a:focus-visible,
.top-links a.active {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.14);
}

.language-switch {
  grid-column: 4;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.lang-link,
.lang-link:hover,
.lang-link:focus-visible,
.lang-link.active {
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-white);
}

.lang-separator {
  color: rgba(255, 255, 255, 0.8);
}

.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  z-index: 900;
  overflow-y: auto;
  padding: var(--space-8) var(--space-5);
  background: linear-gradient(180deg, var(--color-sidebar-top) 0%, var(--color-sidebar-bottom) 100%);
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sidebar a {
  display: block;
  padding: 0.95rem 1rem;
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.86);
  font-weight: 600;
  line-height: 1.35;
}

.sidebar-group {
  margin-bottom: var(--space-4);
}

.sidebar-group-title {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.sidebar .sub-item {
  padding-left: 1.8rem;
  font-size: 0.92rem;
  opacity: 0.9;
}

.sidebar .sub-item:hover {
  opacity: 1;
}

.sidebar a:hover,
.sidebar a:focus-visible,
.sidebar a.active {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
}

.content {
  margin-top: var(--header-height);
  margin-left: var(--sidebar-width);
  padding: var(--space-8);
}

.content-inner {
  width: min(100%, var(--content-max));
  margin: 0 auto;
}

section {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: clamp(1.4rem, 1rem + 1vw, 2.2rem);
  margin-bottom: var(--space-8);
}

.card-hero {
  padding: clamp(1.8rem, 1.2rem + 1.8vw, 3rem);
}

.feature-box,
.access-card,
.robot-card,
.link-tile,
.info-box {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4) inset;
}

.feature-box h3,
.access-card h3,
.robot-card h3,
.link-tile h3,
.info-box h3 {
  margin-bottom: var(--space-3);
}

.grid-2,
.grid-3,
.grid-4,
.parallel-grid,
.links-grid {
  display: grid;
  gap: var(--space-5);
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.parallel-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.links-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.95fr);
  gap: var(--space-8);
  align-items: center;
}

.hero-copy,
.hero-visual {
  min-width: 0;
}

.btn-row,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 46px;
  padding: 0.8rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  box-shadow: 0 10px 22px rgba(0, 94, 168, 0.22);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-surface-soft);
  color: var(--color-primary-dark);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: var(--space-5);
}

.chips span,
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  border: 1px solid #bfd7f0;
  color: var(--color-primary-dark);
  font-size: 0.92rem;
  font-weight: 700;
}

.link-tile {
  display: block;
  height: 100%;
}

.link-tile:hover,
.link-tile:focus-visible {
  border-color: #aac8e6;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.media-placeholder,
.thumb-placeholder,
.video-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 260px;
  padding: var(--space-6);
  text-align: center;
  color: var(--color-text-soft);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.65), rgba(234, 240, 248, 0.95)),
    repeating-linear-gradient(
      45deg,
      rgba(0, 94, 168, 0.04),
      rgba(0, 94, 168, 0.04) 12px,
      rgba(255, 255, 255, 0.55) 12px,
      rgba(255, 255, 255, 0.55) 24px
    );
  border: 2px dashed #bfd0e2;
  border-radius: var(--radius-md);
}

.media-placeholder img {
  max-height: 280px;
  width: auto;
  object-fit: contain;
}

.thumb-placeholder {
  min-height: 160px;
  margin-bottom: var(--space-4);
}

.video-placeholder {
  min-height: 340px;
}

.media-caption {
  margin-top: var(--space-3);
  font-size: 0.92rem;
  color: var(--color-text-soft);
}

.access-tech {
  border-top: 5px solid var(--color-primary);
}

.access-edu {
  border-top: 5px solid var(--color-success);
}

.highlight-panel {
  background: linear-gradient(180deg, #f8fbff 0%, #edf5fd 100%);
}

.robot-card {
  display: flex;
  flex-direction: column;
}

.robot-card p {
  margin-bottom: 0;
}

.footer-note,
.site-footer {
  padding: var(--space-6) 0 var(--space-8);
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
}

th,
td {
  padding: 0.95rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

th {
  background: var(--color-surface-soft);
  color: var(--color-heading);
  font-size: 0.92rem;
  font-weight: 800;
}

code,
pre {
  font-family: var(--font-mono);
}

code {
  padding: 0.18rem 0.42rem;
  border-radius: 8px;
  background: #eef4fb;
  color: #083f70;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background: #0f1724;
  color: #ebf1f8;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

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

:focus-visible {
  outline: 3px solid rgba(0, 94, 168, 0.28);
  outline-offset: 2px;
  border-radius: 8px;
}

@media (max-width: 1200px) {
  :root {
    --sidebar-width: 240px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3,
  .links-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .topbar {
    grid-template-columns: var(--sidebar-width) auto 1fr;
    height: auto;
    padding-top: var(--space-4);
    padding-bottom: var(--space-4);
  }

  .language-switch {
    grid-column: 3;
  }
}

@media (max-width: 920px) {
  :root {
    --header-height: auto;
  }

  .topbar {
    position: sticky;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    height: auto;
  }

  .brand-logo,
  .brand-block,
  .top-links,
  .language-switch {
    grid-column: 1;
    justify-self: start;
  }

  .brand-logo {
    height: 44px;
  }

  .top-links {
    justify-content: flex-start;
    width: 100%;
  }

  .sidebar {
    position: static;
    width: auto;
    padding: var(--space-4) var(--space-5);
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .sidebar nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content {
    margin-top: 0;
    margin-left: 0;
    padding: var(--space-5);
  }

  .grid-2,
  .grid-3,
  .parallel-grid,
  .links-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .top-links {
    gap: var(--space-1);
  }

  .top-links a {
    padding: 0.55rem 0.75rem;
    font-size: 0.9rem;
  }

  .sidebar nav {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

  .card,
  .card-hero,
  .feature-box,
  .access-card,
  .robot-card,
  .link-tile,
  .info-box {
    padding: var(--space-5);
  }

  .media-placeholder {
    min-height: 220px;
  }

  .video-placeholder {
    min-height: 240px;
  }
}