:root {
  --bg-primary: #0A192F;
  --bg-secondary: #112240;
  --bg-tertiary: #233554;
  --accent-blue: #64FFDA;
  --accent-yellow: #FACC15;
  --accent-yellow-hover: #EAB308;
  --text-primary: #CCD6F6;
  --text-secondary: #8892B0;
  --text-dark: #0A192F;
  --navbar-bg: rgba(10, 25, 47, 0.85);
  
  --font-main: 'Inter', sans-serif;
  --transition-fast: 0.2s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  
  --shadow-sm: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-md: 0 10px 15px rgba(0,0,0,0.1);
  --shadow-lg: 0 20px 25px rgba(0,0,0,0.15);
  --shadow-hover: 0 10px 30px rgba(250, 204, 21, 0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
}

main { flex-grow: 1; }
a { text-decoration: none; color: inherit; transition: var(--transition-fast); }
ul { list-style: none; }

.text-yellow { color: var(--accent-yellow); }
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }
.d-none { display: none !important; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5rem; padding: 0.75rem 1.5rem; border-radius: 0.5rem;
  font-weight: 600; cursor: pointer; transition: var(--transition-normal);
  border: none; font-family: var(--font-main); font-size: 1rem;
}
.btn-primary { background-color: var(--accent-yellow); color: var(--text-dark); box-shadow: 0 4px 14px rgba(250, 204, 21, 0.4); }
.btn-primary:hover { background-color: var(--accent-yellow-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(250, 204, 21, 0.6); }

.btn-secondary { background-color: var(--bg-tertiary); color: var(--text-primary); border: 1px solid rgba(255,255,255,0.1); }
.btn-secondary:hover { background-color: rgba(255,255,255,0.1); transform: translateY(-2px); }

.btn-danger { background-color: #ef4444; color: white; }
.btn-danger:hover { background-color: #dc2626; }

.btn-outline { background-color: transparent; color: var(--accent-yellow); border: 2px solid var(--accent-yellow); }
.btn-outline:hover { background-color: rgba(250, 204, 21, 0.1); transform: translateY(-2px); }

.btn-icon { width: 40px; height: 40px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; padding: 0; }

.section { padding: 5rem 0; }
.bg-secondary { background-color: var(--bg-secondary); }
.container { width: 90%; max-width: 1200px; margin: 0 auto; }

.section-title { text-align: center; font-size: 2.5rem; margin-bottom: 3rem; color: var(--text-primary); }

.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  background-color: var(--navbar-bg); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  z-index: 1000; padding: 1rem 0; border-bottom: 1px solid rgba(255,255,255,0.05); transition: var(--transition-normal);
}
.nav-container { width: 90%; max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.nav-logo { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links > a { font-weight: 500; color: var(--text-secondary); }
.nav-links > a:hover { color: var(--accent-yellow); }

.dropdown { position: relative; }
.dropdown .dropbtn { background: none; border: none; font-family: inherit; font-size: 1rem; font-weight: 500; color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; gap: 0.5rem; transition: var(--transition-fast); }
.dropdown:hover .dropbtn { color: var(--accent-yellow); }
.dropdown-content { display: none; position: absolute; top: 100%; left: 0; background-color: var(--bg-tertiary); min-width: 250px; box-shadow: var(--shadow-lg); border-radius: 0.5rem; padding: 0.5rem 0; z-index: 1; border: 1px solid rgba(255,255,255,0.05); }
.dropdown:hover .dropdown-content { display: block; animation: fadeIn 0.3s ease; }
.dropdown-content a { display: block; padding: 0.75rem 1.5rem; color: var(--text-secondary); font-size: 0.95rem; }
.dropdown-content a:hover { background-color: rgba(255,255,255,0.05); color: var(--accent-yellow); }

.mobile-menu-btn { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.5rem; cursor: pointer; }

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; align-items: flex-start; position: absolute; top: 100%; left: 0; right: 0; background-color: var(--bg-secondary); padding: 2rem; box-shadow: var(--shadow-md); border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav-links.active { display: flex; }
  .mobile-menu-btn { display: block; }
  .dropdown-content { position: static; box-shadow: none; background: transparent; padding-left: 1rem; border: none; }
  .dropdown:hover .dropdown-content { display: none; }
  .dropdown.active .dropdown-content { display: block; }
}

.hero { position: relative; height: 100vh; min-height: 600px; display: flex; align-items: center; justify-content: center; overflow: hidden; padding-top: 5rem; }
#particles-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; padding: 0 2rem; }
.hero-content h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: 1.2; margin-bottom: 1.5rem; font-weight: 700; background: linear-gradient(135deg, #fff 0%, var(--accent-yellow) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-content p { font-size: clamp(1rem, 2vw, 1.25rem); color: var(--text-secondary); margin-bottom: 2.5rem; }

.tool-card { background-color: var(--bg-tertiary); border-radius: 1rem; padding: 2rem; text-align: center; transition: var(--transition-normal); border: 1px solid rgba(255,255,255,0.05); display: block; }
.tool-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-hover); border-color: rgba(250, 204, 21, 0.3); }
.tool-icon { width: 64px; height: 64px; margin: 0 auto 1.5rem; background-color: rgba(250, 204, 21, 0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; color: var(--accent-yellow); transition: var(--transition-normal); }
.tool-card:hover .tool-icon { background-color: var(--accent-yellow); color: var(--bg-primary); transform: scale(1.1); }
.tool-card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; color: var(--text-primary); }
.tool-card p { font-size: 0.9rem; color: var(--text-secondary); }

.benefit-card { background-color: var(--bg-secondary); border-radius: 1rem; padding: 2rem; text-align: center; border: 1px solid rgba(255,255,255,0.05); transition: var(--transition-fast); }
.benefit-card:hover { transform: translateY(-5px); border-color: rgba(255,255,255,0.1); }
.benefit-card i { font-size: 2.5rem; margin-bottom: 1.5rem; }
.benefit-card h3 { margin-bottom: 1rem; color: var(--text-primary); }
.benefit-card p { color: var(--text-secondary); }

.footer { background-color: var(--bg-secondary); padding: 4rem 0 2rem; border-top: 1px solid rgba(255,255,255,0.05); margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
@media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 576px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h4 { color: var(--text-primary); font-size: 1.2rem; margin-bottom: 1.5rem; position: relative; padding-bottom: 0.5rem; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 40px; height: 2px; background-color: var(--accent-yellow); }
.footer-logo { font-size: 2rem; font-weight: 700; display: inline-block; margin-bottom: 1rem; }
.footer-desc { color: var(--text-secondary); margin-bottom: 1.5rem; }
.social-links { display: flex; gap: 1rem; }
.social-links a { width: 40px; height: 40px; border-radius: 50%; background-color: var(--bg-tertiary); display: flex; align-items: center; justify-content: center; color: var(--text-primary); transition: var(--transition-fast); }
.social-links a:hover { background-color: var(--accent-yellow); color: var(--bg-primary); transform: translateY(-3px); }
.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col a { color: var(--text-secondary); }
.footer-col a:hover { color: var(--accent-yellow); padding-left: 0.25rem; }
.footer-bottom { text-align: center; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.05); color: var(--text-secondary); font-size: 0.9rem; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

.page-header { padding: 8rem 0 4rem; text-align: center; background-color: var(--bg-secondary); border-bottom: 1px solid rgba(255,255,255,0.05); }
.page-title { font-size: clamp(2rem, 4vw, 3rem); color: var(--text-primary); margin-bottom: 1rem; }
.page-subtitle { color: var(--accent-yellow); font-size: 1.2rem; }
.content-container { max-width: 800px; margin: 4rem auto; padding: 0 1.5rem; }
.content-container p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 1.1rem; }
.content-container h2 { color: var(--text-primary); margin: 2.5rem 0 1.5rem; font-size: 1.8rem; }
.content-container ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1.5rem; color: var(--text-secondary); }
.content-container li { margin-bottom: 0.5rem; }

.tool-page-header { padding: 8rem 0 4rem; text-align: center; background-color: var(--bg-secondary); border-bottom: 1px solid rgba(255,255,255,0.05); }
.tool-title { font-size: 2.5rem; margin-bottom: 1rem; color: var(--accent-yellow); }
.tool-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

.tool-container { max-width: 800px; margin: -3rem auto 5rem; background-color: var(--bg-tertiary); border-radius: 1rem; padding: 2.5rem; box-shadow: var(--shadow-lg); border: 1px solid rgba(255,255,255,0.05); position: relative; z-index: 10; }
@media (max-width: 576px) { .tool-container { margin: -3rem 1rem 3rem; padding: 1.5rem; } }

.seo-content { max-width: 800px; margin: 0 auto 5rem; color: var(--text-secondary); padding: 0 1.5rem; }
.seo-content h2 { color: var(--text-primary); margin: 2rem 0 1rem; font-size: 1.8rem; }
.seo-content h3 { color: var(--text-primary); margin: 1.5rem 0 0.5rem; font-size: 1.4rem; }
.seo-content p { margin-bottom: 1rem; }
.seo-content ul { padding-left: 1.5rem; margin-bottom: 1rem; list-style: disc; }
.seo-content li { margin-bottom: 0.5rem; }

.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; margin-bottom: 0.5rem; color: var(--text-primary); font-weight: 500; }
.form-control { width: 100%; padding: 0.75rem 1rem; background-color: var(--bg-secondary); border: 1px solid rgba(255,255,255,0.1); border-radius: 0.5rem; color: var(--text-primary); font-family: var(--font-main); transition: var(--transition-fast); font-size: 1rem; }
.form-control:focus { outline: none; border-color: var(--accent-yellow); box-shadow: 0 0 0 2px rgba(250, 204, 21, 0.2); }
textarea.form-control { resize: vertical; min-height: 120px; }

.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.w-full { width: 100%; }