/* Modern, clean design for blox.build */

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-secondary: #8b5cf6;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-text: #1f2937;
  --color-text-light: #6b7280;
  --color-border: #e5e7eb;
  --spacing-unit: 8px;
  --border-radius: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 3);
}

/* Header / Hero */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  padding: calc(var(--spacing-unit) * 10) 0 calc(var(--spacing-unit) * 8);
  text-align: center;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 3);
}

.logo-icon {
  font-size: 64px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.tagline {
  font-size: 24px;
  opacity: 0.95;
  font-weight: 300;
}

/* Sections */
section {
  padding: calc(var(--spacing-unit) * 10) 0;
}

section:nth-child(even) {
  background: var(--color-bg-secondary);
}

h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit) * 4);
  text-align: center;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

/* Intro */
.intro {
  text-align: center;
}

.big {
  font-size: 20px;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
  color: var(--color-text-light);
}

.big strong {
  color: var(--color-text);
  font-weight: 600;
}

/* How It Works */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing-unit) * 4);
  margin-top: calc(var(--spacing-unit) * 6);
}

.step {
  text-align: center;
}

.step-number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  font-size: 28px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto calc(var(--spacing-unit) * 3);
}

.step p {
  color: var(--color-text-light);
  font-size: 16px;
}

/* Blocks Grid */
.blocks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: calc(var(--spacing-unit) * 3);
  margin-top: calc(var(--spacing-unit) * 6);
}

.block-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 4);
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.block-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
  border-color: var(--color-primary);
}

.block-card.coming-soon {
  opacity: 0.6;
  cursor: not-allowed;
}

.block-card.coming-soon:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--color-border);
}

.block-icon {
  font-size: 48px;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.block-card h3 {
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.block-card p {
  color: var(--color-text-light);
  font-size: 15px;
  margin-bottom: calc(var(--spacing-unit) * 3);
  flex-grow: 1;
}

.block-meta {
  display: flex;
  gap: calc(var(--spacing-unit) * 2);
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.block-status {
  display: inline-block;
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.block-card.available .block-status {
  background: #d1fae5;
  color: #065f46;
}

.block-card.coming-soon .block-status {
  background: #fef3c7;
  color: #92400e;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: calc(var(--spacing-unit) * 4);
  margin-top: calc(var(--spacing-unit) * 6);
}

.skill {
  text-align: center;
}

.skill h3 {
  font-size: 20px;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.skill p {
  color: var(--color-text-light);
  font-size: 15px;
}

/* Proficiency Levels */
.levels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: calc(var(--spacing-unit) * 3);
  margin-top: calc(var(--spacing-unit) * 6);
}

.level-card {
  background: white;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 4);
  text-align: center;
}

.level-badge {
  font-size: 32px;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.level-card h3 {
  font-size: 20px;
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.level-card p {
  color: var(--color-text-light);
  font-size: 14px;
}

/* CTA */
.cta {
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
}

.cta h2 {
  color: white;
}

.cta p {
  font-size: 20px;
  margin-bottom: calc(var(--spacing-unit) * 4);
  opacity: 0.95;
}

.cta-button {
  display: inline-block;
  background: white;
  color: var(--color-primary);
  padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
  border-radius: var(--border-radius);
  font-size: 18px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* Footer */
footer {
  background: var(--color-text);
  color: white;
  padding: calc(var(--spacing-unit) * 6) 0;
  text-align: center;
}

footer p {
  opacity: 0.8;
  margin-bottom: calc(var(--spacing-unit) * 1);
}

footer a {
  color: white;
  text-decoration: underline;
}

.tagline-small {
  font-size: 14px;
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 40px;
  }

  .tagline {
    font-size: 18px;
  }

  h2 {
    font-size: 32px;
  }

  .steps,
  .blocks-grid,
  .skills-grid,
  .levels {
    grid-template-columns: 1fr;
  }
}