/* MeasureHub zwxitke.com - Complete Stylesheet */
:root {
  --primary: #1ABC9C;
  --primary-dark: #17A589;
  --secondary: #1A1A2E;
  --accent: #E67E22;
  --background: #F0FAF8;
  --card: #FFFFFF;
  --text: #2C3E50;
  --text-light: #7F8C8D;
  --border: #D5E8E5;
  --danger: #E74C3C;
  --warning: #F39C12;
  --success: #27AE60;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
  --max-w: 1100px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== HEADER ===== */
.header {
  background: var(--card);
  border-bottom: 3px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header > div {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
}

.nav a:hover { background: var(--background); color: var(--primary); }
.nav a.active { color: var(--primary); font-weight: 700; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  border-radius: var(--radius);
}

.hamburger:hover { background: var(--background); }
.hamburger span { width: 22px; height: 2px; background: var(--secondary); border-radius: 2px; display: block; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.nav-mobile { display: none; background: var(--card); border-top: 1px solid var(--border); padding: 12px 24px; }
.nav-mobile.show { display: block; }
.nav-mobile a { display: block; color: var(--text); text-decoration: none; padding: 10px 0; border-bottom: 1px solid var(--border); font-weight: 500; }
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a.active { color: var(--primary); font-weight: 700; }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 80px 24px;
  text-align: center;
}

.hero-content { max-width: var(--max-w); margin: 0 auto; }

.hero h1 { font-size: 2.8rem; font-weight: 800; margin-bottom: 16px; line-height: 1.2; }
.hero p { font-size: 1.15rem; opacity: 0.9; max-width: 600px; margin: 0 auto 32px; line-height: 1.7; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: #f1f5f9; transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #d35400; transform: translateY(-2px); }

/* ===== MAIN ===== */
main { flex: 1; }

/* ===== SECTIONS ===== */
.section { padding: 60px 24px; max-width: var(--max-w); margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 40px; }
.section-title { font-size: 2rem; font-weight: 800; color: var(--secondary); margin-bottom: 8px; }
.section-subtitle { color: var(--text-light); font-size: 1.05rem; }

/* ===== CARD GRID ===== */
.card-grid,
.tools-grid,
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-icon { font-size: 2.5rem; margin-bottom: 16px; }
.card-title { font-size: 1.1rem; font-weight: 700; color: var(--secondary); margin-bottom: 8px; }
.card-description { color: var(--text-light); font-size: 0.9rem; margin-bottom: 16px; line-height: 1.5; }

/* ===== ARTICLE CARDS ===== */
.article-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: block;
}

.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.article-card img { width: 100%; height: 180px; object-fit: cover; display: block; }
.article-card-content { padding: 20px; }
.article-tag { display: inline-block; background: var(--primary); color: #fff; padding: 3px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; margin-bottom: 8px; }
.article-card h3 { font-size: 1rem; font-weight: 700; color: var(--secondary); margin-bottom: 6px; line-height: 1.4; }
.article-card p { color: var(--text-light); font-size: 0.88rem; line-height: 1.5; }

/* ===== FEATURES ===== */
.features-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 24px; }

.feature-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.feature-icon { font-size: 2.5rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--secondary); margin-bottom: 8px; }
.feature-card p { color: var(--text-light); font-size: 0.88rem; line-height: 1.5; }

/* ===== PAGE HEADER ===== */
.page-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 60px 24px;
  text-align: center;
}

.page-header h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 8px; }
.page-header p { font-size: 1.05rem; opacity: 0.9; max-width: 600px; margin: 0 auto; }

/* ===== FAQ ===== */
.faq-item { background: var(--card); border-radius: var(--radius); margin-bottom: 8px; border: 1px solid var(--border); }
.faq-item summary { padding: 18px 24px; cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.3rem; color: var(--primary); font-weight: 700; }
.faq-item[open] summary::after { content: '-'; }
.faq-item .faq-answer { padding: 0 24px 18px; color: var(--text-light); line-height: 1.7; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; color: var(--text); font-size: 0.95rem; }
.form-input {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--card);
  color: var(--text);
}
.form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,188,156,0.1); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===== FOOTER ===== */
footer, .footer {
  background: var(--secondary);
  color: #fff;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
}

.footer-col h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 12px; color: #fff; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: rgba(255,255,255,0.7); text-decoration: none; font-size: 0.9rem; transition: var(--transition); display: block; }
.footer-col a:hover { color: #fff; }
.footer-col p { color: rgba(255,255,255,0.7); font-size: 0.9rem; line-height: 1.6; }

.footer-bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ===== TOOL PAGE ===== */
.tool-page { max-width: 800px; margin: 0 auto; padding: 40px 24px; }
.tool-page h1 { font-size: 1.8rem; font-weight: 800; color: var(--secondary); margin-bottom: 8px; }
.tool-page .subtitle { color: var(--text-light); margin-bottom: 32px; font-size: 1.05rem; }
.tool-card-form { background: var(--card); border-radius: var(--radius-lg); padding: 32px; box-shadow: var(--shadow); border: 1px solid var(--border); margin-bottom: 24px; }

.result-box { background: var(--card); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow); border: 2px solid var(--primary); display: none; }
.info-box { background: #F0FAF8; border: 1px solid var(--primary); border-radius: var(--radius); padding: 16px; margin-top: 16px; font-size: 0.9rem; color: var(--secondary); }
.info-box h4 { font-weight: 700; margin-bottom: 6px; }

/* ===== ARTICLE BODY ===== */
.article-body { font-size: 1.05rem; line-height: 1.8; color: var(--text); }
.article-body h2 { font-size: 1.5rem; font-weight: 700; color: var(--secondary); margin: 2rem 0 0.75rem; border-left: 4px solid var(--primary); padding-left: 12px; }
.article-body h3 { font-size: 1.2rem; font-weight: 700; color: var(--secondary); margin: 1.5rem 0 0.5rem; }
.article-body p { margin: 0 0 1.2rem; }
.article-body ul, .article-body ol { margin: 0 0 1.2rem 1.5rem; }
.article-body li { margin-bottom: 0.4rem; }
.article-body blockquote { border-left: 4px solid var(--primary); padding: 12px 20px; background: #F0FAF8; margin: 1.5rem 0; font-style: italic; color: var(--text-light); }

.related-box { background: #F0FAF8; border: 2px solid var(--primary); border-radius: var(--radius-lg); padding: 24px; margin-top: 40px; }
.related-box h3 { font-size: 1.1rem; font-weight: 700; color: var(--secondary); margin: 0 0 12px; }
.related-box a { display: block; color: var(--primary); font-weight: 600; text-decoration: none; margin-bottom: 6px; }
.related-box a:hover { text-decoration: underline; }

/* ===== TABLES ===== */
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; }
th { background: var(--primary); color: #fff; padding: 12px 16px; text-align: left; font-weight: 600; }
td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--background); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav { display: none; }
  .hamburger { display: flex; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 40px 16px; }
  .section-title { font-size: 1.6rem; }
  .card-grid, .tools-grid, .articles-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .page-header h1 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .hero { padding: 50px 16px; }
  .hero h1 { font-size: 1.6rem; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .tool-page { padding: 24px 16px; }
  .tool-card-form { padding: 20px; }
}

/* ===== UTILITY ===== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-light); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }