*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f0f2f5;
  color: #1a1a1a;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
}

/* ---------- HEADER ---------- */

.app-header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.app-header::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, #2563eb 0%, #7c3aed 100%);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

.app-header-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 14px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: 8px;
}

.app-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.app-logo {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #111;
  margin: 0;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: #4b5563;
  text-decoration: none;
}

.nav-link:hover {
  color: #2563eb;
}

/* ---------- HERO ---------- */

.hero {
  background: linear-gradient(180deg, #eff6ff 0%, #f0f2f5 100%);
  border-bottom: 1px solid #e5e7eb;
  padding: 64px 28px 56px;
  text-align: center;
}

.hero-inner {
  max-width: 720px;
  margin: 0 auto;
}

.hero-logo {
  width: 72px;
  height: 72px;
  margin-bottom: 8px;
}

.hero-title {
  font-size: 2rem;
  font-weight: 800;
  color: #111;
  margin: 10px 0 14px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1rem;
  color: #4b5563;
  line-height: 1.6;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-cta {
  text-decoration: none;
  font-size: 1rem;
  padding: 12px 26px;
}

.hero-secondary {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #374151;
  text-decoration: none;
  border: 1px solid #d0d5dd;
  border-radius: 8px;
  background: #fff;
  transition: background 0.15s, border-color 0.15s;
}

.hero-secondary:hover {
  background: #f7f8fa;
  border-color: #b0b8c4;
}

/* ---------- PAGE CONTENT ---------- */

.page-content {
  max-width: 1040px;
  margin: 0 auto;
  padding: 40px 28px 60px;
}

/* ---------- CARDS ---------- */

.card {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 14px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
  overflow: hidden;
}

.card-section {
  padding: 24px 26px;
}

/* ---------- SECTION LABELS ---------- */

.section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  color: #2563eb;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.label-hint {
  font-weight: 400;
  color: #aaa;
  font-size: 0.73rem;
}

.hint-icon {
  width: 12px;
  height: 12px;
  vertical-align: -1px;
  flex-shrink: 0;
}

/* ---------- FEATURES ---------- */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}

.feature h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #111;
  margin: 0 0 6px;
}

.feature p {
  font-size: 0.85rem;
  color: #6b7280;
  line-height: 1.55;
  margin: 0;
}

/* ---------- CÓMO FUNCIONA ---------- */

.modal-subtitle {
  font-size: 0.85rem;
  color: #6b7280;
  margin: 0;
}

.help-steps {
  margin: 0 0 18px;
  padding-left: 20px;
  font-size: 0.85rem;
  color: #374151;
  line-height: 1.6;
}

.help-steps li {
  margin-bottom: 6px;
}

.modal-divider {
  height: 1px;
  background: #f0f0f0;
  margin: 0 0 18px;
}

/* ---------- DESCARGAS ---------- */

.version-tag {
  display: inline-block;
  font-family: monospace;
  font-size: 0.8rem;
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
  border-radius: 20px;
  padding: 4px 12px;
  margin-bottom: 18px;
}

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.download-card {
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  padding: 18px 16px;
  text-align: center;
  background: #fafbfc;
}

.download-card.highlight {
  border-color: #93c5fd;
  background: #eff6ff;
}

.download-card h4 {
  margin: 8px 0 12px;
  font-size: 0.9rem;
  color: #111;
}

.download-card .os-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-card .os-icon svg {
  width: 30px;
  height: 30px;
  color: #4b5563;
}

.download-card .alt-links {
  margin-top: 10px;
  font-size: 0.75rem;
}

.download-card .alt-links a {
  color: #6b7280;
  margin: 0 4px;
  text-decoration: none;
}

.download-card .alt-links a:hover {
  color: #2563eb;
}

.download-card .unavailable {
  font-size: 0.78rem;
  color: #aaa;
  padding: 10px 0;
}

/* ---------- BUTTONS ---------- */

.primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 22px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(37, 99, 235, 0.3), 0 1px 2px rgba(0, 0, 0, 0.08);
  transition: background 0.15s, box-shadow 0.15s;
}

.primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  opacity: 0.9;
}

.btn-icon svg {
  width: 15px;
  height: 15px;
}

/* ---------- FOOTER ---------- */

.app-footer {
  border-top: 1px solid #e5e7eb;
  background: #fff;
  padding: 0 28px;
}

.app-footer-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-author {
  font-size: 0.8rem;
  color: #6b7280;
}

.footer-author strong {
  color: #374151;
  font-weight: 600;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  font-weight: 500;
  color: #6b7280;
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid #e5e7eb;
  background: #f9fafb;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.footer-link:hover {
  color: #111;
  border-color: #d1d5db;
  background: #f3f4f6;
}

.footer-link-linkedin:hover {
  color: #0a66c2;
  border-color: #bfdbfe;
  background: #eff6ff;
}

.footer-link-icon {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}