@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;700&family=Inter:wght@400;500;700&display=swap');

:root {
  --color-bg-principal: #0F1117;
  --color-bg-cards:     #1A1D27;
  --color-acento:       #6C63FF;
  --color-acento-hover: #857DFF;
  --color-texto-blanco: #FFFFFF;
  --color-texto-gris:   #A0AEC0;
  --color-verde:        #48BB78;
  --fuente-titulo:      'Space Grotesk', sans-serif;
  --fuente-cuerpo:      'Inter', sans-serif;
  --radio-card:         12px;
  --radio-boton:        8px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--fuente-cuerpo); background-color: var(--color-bg-principal); color: var(--color-texto-blanco); line-height: 1.6; }
a { text-decoration: none; color: inherit; }

.btn { display: inline-block; padding: 12px 24px; border-radius: var(--radio-boton); font-family: var(--fuente-cuerpo); font-size: 0.95rem; font-weight: 700; cursor: pointer; border: 2px solid transparent; transition: all 0.3s ease; }
.btn--primary { background-color: var(--color-acento); color: var(--color-texto-blanco); border-color: var(--color-acento); }
.btn--primary:hover { background-color: var(--color-acento-hover); transform: translateY(-2px); }
.btn--outline { background-color: transparent; color: var(--color-acento); border-color: var(--color-acento); }
.btn--outline:hover { background-color: var(--color-acento); color: var(--color-texto-blanco); }
.btn--small { padding: 6px 16px; font-size: 0.8rem; }

.navbar { position: sticky; top: 0; width: 100%; height: 70px; background-color: var(--color-bg-cards); display: flex; align-items: center; z-index: 100; }
.navbar__container { max-width: 1200px; width: 100%; margin: 0 auto; padding: 0 40px; display: flex; align-items: center; justify-content: space-between; }
.navbar__logo { font-family: var(--fuente-titulo); font-size: 1.25rem; font-weight: 700; color: var(--color-acento); }

.app-header {
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 80px;
  padding: 60px 80px;
  background: linear-gradient(135deg, var(--color-bg-principal) 0%, #131629 100%);
}

.app-header__content {
  max-width: 500px;
}

.app-header__content h1 {
  font-family: var(--fuente-titulo);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
}

.app-header__content h1 span {
  color: var(--color-acento);
}

.app-header__content p {
  font-size: 1.1rem;
  color: var(--color-texto-gris);
  margin-bottom: 36px;
  line-height: 1.7;
}

.app-header__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.task-preview {
  background-color: var(--color-bg-cards);
  border-radius: var(--radio-card);
  padding: 24px;
  width: 340px;
  border: 1px solid rgba(108, 99, 255, 0.3);
  box-shadow: 0 20px 60px rgba(108, 99, 255, 0.15);
}

.task-preview__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  font-family: var(--fuente-titulo);
  font-weight: 700;
  font-size: 1rem;
}

.badge {
  background-color: var(--color-acento);
  color: white;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  background-color: var(--color-bg-principal);
  transition: background-color 0.2s ease;
}

.task-item:hover {
  background-color: rgba(108, 99, 255, 0.1);
}

.task-item--done .task-item__text {
  text-decoration: line-through;
  color: var(--color-texto-gris);
}

.task-item__check {
  font-size: 1rem;
  color: var(--color-verde);
  width: 20px;
  text-align: center;
}

.task-item__text {
  font-size: 0.9rem;
}

.features {
  padding: 100px 80px;
  background-color: var(--color-bg-cards);
  text-align: center;
}

.features h2 {
  font-family: var(--fuente-titulo);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
}

.features__grid {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 1000px;
  margin: 0 auto;
}

.feature-card {
  background-color: var(--color-bg-principal);
  border-radius: var(--radio-card);
  padding: 32px 24px;
  width: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
}

.feature-card__icon {
  font-size: 2.5rem;
}

.feature-card h3 {
  font-family: var(--fuente-titulo);
  font-size: 1rem;
  font-weight: 700;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--color-texto-gris);
}

.tech-stack {
  padding: 80px 40px;
  background-color: var(--color-bg-principal);
  text-align: center;
}

.tech-stack h2 {
  font-family: var(--fuente-titulo);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 40px;
}

.tech-stack__grid {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 800px;
  margin: 0 auto;
}

.tech-badge {
  padding: 10px 24px;
  background-color: var(--color-bg-cards);
  border: 1px solid var(--color-acento);
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--color-acento);
  font-weight: 500;
}

.footer {
  padding: 32px 40px;
  background-color: var(--color-bg-cards);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer p { font-size: 0.875rem; color: var(--color-texto-gris); }
.footer a { font-size: 0.875rem; color: var(--color-acento); }
.footer a:hover { color: var(--color-acento-hover); }

@media (max-width: 768px) {
  .app-header { flex-direction: column; padding: 60px 24px; text-align: center; }
  .app-header__content h1 { font-size: 2rem; }
  .app-header__buttons { justify-content: center; }
  .task-preview { width: 100%; }
  .features { padding: 60px 24px; }
  .footer { flex-direction: column; text-align: center; padding: 24px; }
}