/* ZHTools - Main Stylesheet */

:root {
  /* Colors */
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.1);
  --primary-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
  
  /* Background */
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  
  /* Text */
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  
  /* Borders */
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Spacing */
  --container-max: 1200px;
  --section-padding: 80px;
  
  /* Transitions */
  --transition: all 0.2s ease;
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

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

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.nav {
  padding: 16px 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  color: var(--text);
}

.logo-img {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  background: var(--bg);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--primary);
  color: white !important;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text) !important;
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: var(--primary-light);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-mockup {
  width: 100%;
  max-width: 420px;
  background: var(--bg-secondary);
  border-radius: 16px;
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  border: 1px solid var(--border);
}

.mockup-header {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}

.mockup-header .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-hover);
}

.mockup-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mockup-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--bg);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.mockup-icon {
  font-size: 28px;
}

.mockup-text {
  flex: 1;
}

.mockup-title {
  height: 14px;
  width: 60%;
  background: var(--border);
  border-radius: 4px;
  margin-bottom: 8px;
}

.mockup-desc {
  height: 10px;
  width: 80%;
  background: var(--border);
  border-radius: 4px;
}

/* Products Section */
.products {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
}

.products h2,
.about h2,
.contact h2 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  text-align: center;
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.product-card {
  display: flex;
  gap: 24px;
  padding: 32px;
  background: var(--bg);
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.product-icon {
  font-size: 48px;
  flex-shrink: 0;
}

.product-info {
  flex: 1;
}

.product-info h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.product-tagline {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 12px;
}

.product-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-features {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.feature-tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 6px;
}

.product-actions {
  display: flex;
  gap: 12px;
}

.product-coming-soon {
  opacity: 0.7;
}

.product-coming-soon .product-icon {
  opacity: 0.5;
}

/* Ad Section */
.ad-section {
  padding: 40px 0;
  background: var(--bg-secondary);
  text-align: center;
}

/* About Section */
.about {
  padding: var(--section-padding) 0;
  background: var(--bg);
}

.about-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h2 {
  text-align: left;
}

.about-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-points {
  list-style: none;
  margin-top: 24px;
}

.about-points li {
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-secondary);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.stat {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.stat-number {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
}

/* Contact Section */
.contact {
  padding: var(--section-padding) 0;
  background: var(--bg-secondary);
}

.contact-content {
  text-align: center;
  margin-top: 32px;
}

.contact-email {
  display: inline-block;
  font-size: 24px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.contact-email:hover {
  text-decoration: underline;
}

.contact-note {
  font-size: 14px;
  color: var(--text-tertiary);
}

/* Footer */
footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.footer-bottom .small {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-mockup {
    max-width: 360px;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-text h2 {
    text-align: center;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero h1 {
    font-size: 32px;
  }

  .subtitle {
    font-size: 16px;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .product-card {
    flex-direction: column;
    text-align: center;
  }

  .product-features {
    justify-content: center;
  }

  .product-actions {
    justify-content: center;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand .logo {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 28px;
  }

  .btn-lg {
    padding: 12px 24px;
    font-size: 15px;
  }

  .product-card {
    padding: 24px;
  }

  .product-icon {
    font-size: 40px;
  }

  .product-info h3 {
    font-size: 20px;
  }
}