@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=DM+Sans:ital,wght@0,400;0,500;0,700;1,400&display=swap');

:root {
  --color-bg: #FAFAF9;
  --color-surface: #FFFFFF;
  --color-text: #1C1917;
  --color-text-secondary: #57534E;
  --color-text-muted: #A8A29E;
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #EFF6FF;
  --color-accent: #F59E0B;
  --color-border: #E7E5E4;
  --color-border-light: #F5F5F4;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --max-width: 1120px;
  --header-height: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 22px;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.site-logo span { color: var(--color-primary); }

.site-nav { display: flex; align-items: center; gap: 8px; }

.site-nav a {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.site-nav a:hover, .site-nav a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle svg { width: 24px; height: 24px; stroke: var(--color-text); }

/* ── Main ── */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 80px;
}

/* ── Hero Section ── */
.hero {
  text-align: center;
  padding: 60px 0 48px;
}

.hero h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary), #7C3AED);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 18px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-primary);
  color: #fff;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 16px;
  padding: 14px 28px;
  border-radius: 50px;
  text-decoration: none;
  transition: all 0.25s;
  box-shadow: 0 4px 14px rgba(37,99,235,0.3);
}

.hero-cta:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,0.4);
}

/* ── Tool Preview Card ── */
.tool-preview {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 40px;
  margin: 0 auto 60px;
  max-width: 720px;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.tool-preview h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.tool-preview p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.tool-preview .demo-screen {
  background: #111;
  border-radius: var(--radius);
  padding: 32px 20px;
  margin-bottom: 24px;
  overflow: hidden;
}

.tool-preview .demo-text {
  font-family: 'Outfit', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: #22D3EE;
  white-space: nowrap;
  animation: scroll-text 8s linear infinite;
}

@keyframes scroll-text {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

/* ── Section Headers ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.section-header h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.section-header a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}

/* ── Blog Grid ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.25s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.blog-card-body { padding: 24px; }

.blog-card-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.blog-card h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
}

.blog-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-meta {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 12px;
}

/* ── Article Page ── */
.article-container {
  max-width: 740px;
  margin: 0 auto;
}

.article-container h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.article-content h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin: 40px 0 16px;
  letter-spacing: -0.3px;
}

.article-content h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
}

.article-content p { margin-bottom: 18px; }

.article-content ul, .article-content ol {
  margin: 0 0 18px 24px;
}

.article-content li { margin-bottom: 8px; }

.article-content img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 24px 0;
}

.article-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 16px 20px;
  margin: 24px 0;
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* ── Tool Page ── */
.tool-page { max-width: 900px; margin: 0 auto; }

.tool-app {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 48px;
  box-shadow: var(--shadow-md);
}

.tool-screen {
  background: #0F0F0F;
  border-radius: var(--radius);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 24px;
  position: relative;
}

.tool-screen .led-text {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  white-space: nowrap;
  will-change: transform;
  padding: 20px 0;
}

.tool-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.tool-control-group { display: flex; flex-direction: column; gap: 6px; }

.tool-control-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tool-control-group input[type="text"],
.tool-control-group select {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: 'DM Sans', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s;
}

.tool-control-group input:focus,
.tool-control-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

.tool-control-group.full-width { grid-column: 1 / -1; }

.tool-btn {
  grid-column: 1 / -1;
  padding: 14px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Outfit', sans-serif;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.tool-btn:hover { background: var(--color-primary-hover); }

.tool-fullscreen-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255,255,255,0.15);
  border: none;
  color: #fff;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
  z-index: 5;
}

.tool-fullscreen-btn:hover { background: rgba(255,255,255,0.25); }

/* Color picker row */
.color-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
}

.color-swatch:hover { transform: scale(1.15); }
.color-swatch.active { border-color: var(--color-primary); box-shadow: 0 0 0 2px var(--color-primary-light); }

/* Speed slider */
input[type="range"] {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  background: var(--color-border);
  border-radius: 3px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  cursor: pointer;
}

/* ── Tool Content Sections ── */
.tool-content {
  max-width: 740px;
  margin: 0 auto;
}

.tool-content section {
  margin-bottom: 40px;
}

.tool-content h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.tool-content h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin: 20px 0 10px;
}

.tool-content p {
  margin-bottom: 14px;
  color: var(--color-text-secondary);
}

.tool-content ul { margin: 0 0 16px 20px; }
.tool-content li { margin-bottom: 6px; color: var(--color-text-secondary); }

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.faq-item:last-child { border-bottom: none; }

.faq-q {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-text);
}

.faq-a {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 40px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 8px;
}

.footer-brand span { color: var(--color-primary); }

.footer-desc {
  font-size: 14px;
  color: var(--color-text-muted);
  max-width: 280px;
  line-height: 1.6;
}

.footer-links h4 {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  color: var(--color-text);
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--color-primary); }

.footer-bottom {
  max-width: var(--max-width);
  margin: 24px auto 0;
  padding: 20px 24px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ── Legal Pages ── */
.legal-page {
  max-width: 740px;
  margin: 0 auto;
}

.legal-page h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.legal-page .updated {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 32px;
}

.legal-page h2 {
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 12px;
}

.legal-page p { margin-bottom: 14px; color: var(--color-text-secondary); }
.legal-page ul { margin: 0 0 14px 20px; }
.legal-page li { margin-bottom: 6px; color: var(--color-text-secondary); }

/* ── Contact Page ── */
.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 560px;
}

.contact-form .form-group { margin-bottom: 20px; }

.contact-form label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: 'DM Sans', sans-serif;
  font-size: 15px;
  background: var(--color-bg);
  transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.contact-form textarea { resize: vertical; min-height: 120px; }

.contact-form button {
  padding: 12px 28px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
}

.contact-form button:hover { background: var(--color-primary-hover); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .site-nav { 
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 16px 24px;
    box-shadow: var(--shadow-md);
  }
  .site-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .blog-grid { grid-template-columns: 1fr; }
  .tool-controls { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 24px; }
  .hero { padding: 40px 0 32px; }
  .tool-app { padding: 20px; }
}