:root {
  --blau: #0F2C5C;
  --blau-deep: #08183A;
  --grana: #8B1A3A;
  --grana-deep: #5E0F26;
  --lliure: #F5C518;
  --paper: #F5F0E6;
  --paper-2: #EDE6D6;
  --ink: #0B0B0B;
  --muted: #5A5550;
  --border: 3px;
  --shadow-x: 6px;
  --shadow-y: 6px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(rgba(11, 11, 11, 0.07) 1.2px, transparent 1.2px);
  background-size: 22px 22px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

code {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  background: var(--paper-2);
  border: 2px solid var(--ink);
  padding: 0.05em 0.4em;
  font-size: 0.88em;
}

a {
  color: var(--grana);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

/* Header */
header {
  border-bottom: var(--border) solid var(--ink);
  padding: 0.9rem 0;
  position: sticky;
  top: 0;
  background: var(--lliure);
  z-index: 100;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.logo-icon {
  font-size: 1.4rem;
}

.logo-text {
  font-family: 'Archivo Black', 'Space Grotesk', sans-serif;
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s;
}

nav a:hover {
  border-bottom-color: var(--ink);
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--blau);
  border: var(--border) solid var(--ink);
  box-shadow: 4px 4px 0 0 var(--ink);
  padding: 0.5rem 1rem;
  margin-bottom: 2.25rem;
}

.hero h1 {
  font-family: 'Archivo Black', sans-serif;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  color: var(--blau);
  text-shadow: 5px 5px 0 var(--lliure);
}

.hero .tagline {
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.5rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.hero .description {
  font-size: 1.05rem;
  color: var(--ink);
  max-width: 580px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-icon-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 2.5rem;
}

.hero-icon {
  width: 220px;
  height: 220px;
  border: var(--border) solid var(--ink);
  box-shadow: 10px 10px 0 0 var(--ink);
  background: var(--paper);
  display: block;
  transform: rotate(-2deg);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.hero-icon:hover {
  transform: rotate(0deg) translate(-3px, -3px);
  box-shadow: 13px 13px 0 0 var(--ink);
}

.hero-meta {
  margin-top: 1.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Buttons */
.button-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.6rem;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: var(--border) solid var(--ink);
  box-shadow: var(--shadow-x) var(--shadow-y) 0 0 var(--ink);
  transition: transform 120ms ease, box-shadow 120ms ease;
  cursor: pointer;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: calc(var(--shadow-x) + 3px) calc(var(--shadow-y) + 3px) 0 0 var(--ink);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: calc(var(--shadow-x) - 4px) calc(var(--shadow-y) - 4px) 0 0 var(--ink);
}

.btn-primary {
  background: var(--lliure);
  color: var(--ink);
}

.btn-secondary {
  background: var(--paper);
  color: var(--ink);
}

/* Sections */
section {
  padding: 5rem 0;
  position: relative;
}

section h2 {
  font-family: 'Archivo Black', sans-serif;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  text-transform: uppercase;
  letter-spacing: -0.01em;
  text-align: center;
  margin-bottom: 0.75rem;
  color: var(--ink);
}

.section-description {
  text-align: center;
  color: var(--ink);
  max-width: 600px;
  margin: 0 auto 3rem;
  font-size: 1rem;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--paper);
  border: var(--border) solid var(--ink);
  box-shadow: 6px 6px 0 0 var(--ink);
  padding: 1.6rem 1.5rem;
  transition: transform 150ms ease, box-shadow 150ms ease;
}

.feature-card:nth-child(odd) { background: var(--paper-2); }

.feature-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 0 var(--ink);
}

.feature-icon {
  font-size: 1.9rem;
  margin-bottom: 0.6rem;
}

.feature-card h3 {
  font-family: 'Archivo Black', sans-serif;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 0.55rem;
  color: var(--blau);
}

.feature-card p {
  color: var(--ink);
  font-size: 0.93rem;
  line-height: 1.6;
}

.feature-card p strong {
  font-weight: 700;
}

/* How it works */
.how-section {
  background: var(--blau);
  color: var(--paper);
  border-top: var(--border) solid var(--ink);
  border-bottom: var(--border) solid var(--ink);
}

.how-section h2 {
  color: var(--lliure);
  text-shadow: 4px 4px 0 var(--grana);
}

.how-section .section-description {
  color: var(--paper);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.step {
  background: var(--paper);
  color: var(--ink);
  border: var(--border) solid var(--ink);
  box-shadow: 6px 6px 0 0 var(--lliure);
  padding: 1.5rem;
}

.step-num {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 700;
  background: var(--grana);
  color: var(--paper);
  border: 2px solid var(--ink);
  padding: 0.15rem 0.55rem;
  margin-bottom: 0.85rem;
}

.step h3 {
  font-family: 'Archivo Black', sans-serif;
  text-transform: uppercase;
  font-size: 1rem;
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
  color: var(--blau);
}

.step p {
  font-size: 0.92rem;
  line-height: 1.55;
}

/* Tech stack */
.tech-stack-section {
  background: var(--paper-2);
  border-top: var(--border) solid var(--ink);
  border-bottom: var(--border) solid var(--ink);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.tech-card {
  background: var(--paper);
  border: var(--border) solid var(--ink);
  box-shadow: 5px 5px 0 0 var(--ink);
  padding: 1.5rem;
  text-align: center;
}

.tech-card h3 {
  font-family: 'Archivo Black', sans-serif;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--grana);
  margin-bottom: 1rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: center;
}

.tech-tags span {
  background: var(--paper-2);
  border: 2px solid var(--ink);
  padding: 0.25rem 0.7rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  color: var(--ink);
}

/* Download */
.download-section {
  background: var(--lliure);
  border-top: var(--border) solid var(--ink);
  text-align: center;
}

.gatekeeper-note {
  margin-top: 2rem;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  background: var(--paper);
  border: var(--border) solid var(--ink);
  box-shadow: 5px 5px 0 0 var(--grana);
  padding: 1.1rem 1.3rem;
  text-align: left;
  font-size: 0.92rem;
  line-height: 1.55;
}

/* Footer */
footer {
  background: var(--ink);
  color: var(--paper);
  padding: 3rem 0 1.75rem;
  border-top: var(--border) solid var(--ink);
}

footer a {
  color: var(--lliure);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  font-family: 'Archivo Black', sans-serif;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
  color: var(--lliure);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.45rem;
}

.footer-section a {
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s;
}

.footer-section a:hover {
  border-bottom-color: var(--lliure);
}

.footer-tagline {
  color: var(--paper);
  font-size: 0.92rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 1.75rem;
  border-top: 2px solid var(--muted);
  color: var(--paper);
  font-size: 0.8rem;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 0.05em;
}

/* Responsive */
@media (max-width: 768px) {
  .hero {
    padding: 3.5rem 0 2.5rem;
  }
  .hero-icon {
    width: 170px;
    height: 170px;
  }
  nav ul {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }
  section { padding: 3.5rem 0; }
  .features-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .header-content { flex-wrap: wrap; justify-content: center; gap: 12px; }
  nav ul { gap: 0.7rem; font-size: 0.85rem; }
  .hero h1 { text-shadow: 3px 3px 0 var(--lliure); }
  .btn { padding: 0.75rem 1.1rem; font-size: 0.85rem; }
}