:root {
  --primary-color: #6366f1;
  --primary-glow: rgba(99, 102, 241, 0.4);
  --secondary-color: #10b981;
  --secondary-glow: rgba(16, 185, 129, 0.4);
  --accent-color: #f59e0b;
  --bg-dark: #020617;
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-hover: rgba(51, 65, 85, 0.8);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --glass-bg: rgba(15, 23, 42, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --border-color: #334155;
  --border-radius-lg: 16px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --bg-gradient-start: #1e1b4b;
  --bg-gradient-end: #020617;
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', monospace;
}

[data-theme="light"] {
  --bg-dark: #f8fafc;
  --bg-primary: #ffffff;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.08);
  --border-color: #e2e8f0;
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
  --bg-gradient-start: #e2e8f0;
  --bg-gradient-end: #f8fafc;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
}

body {
  font-family: var(--font-primary);
  background: radial-gradient(circle at 50% 0%, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 50%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
}

p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.header {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: tracking-tight;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #fff;
}

.logo span {
  background: linear-gradient(135deg, #818cf8, #34d399);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.theme-toggle-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 1.2rem;
}

.theme-toggle-btn:hover {
  background: var(--bg-hover);
  transform: scale(1.1);
  border-color: var(--primary-color);
}

.hero {
  text-align: center;
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  z-index: -1;
  opacity: 0.4;
}

.hero h1 {
  background: linear-gradient(to bottom, #fff, #94a3b8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-bottom: 4rem;
}

.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  display: flex;
  flex-direction: column;
}

.tool-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: var(--bg-hover);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), var(--shadow-glow);
}

.tool-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  transition: transform 0.3s ease;
}

.tool-card:hover .tool-icon {
  transform: scale(1.1) rotate(5deg);
}

.tool-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: #fff;
}

.tool-card p {
  font-size: 1rem;
  line-height: 1.5;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.btn {
  padding: 0.8rem 1.8rem;
  border-radius: var(--border-radius-md);
  font-weight: 700;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary-color);
  color: #fff;
  box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
  background: #4f46e5;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border-color: var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer {
  background: #020617;
  padding: 5rem 0;
  border-top: 1px solid var(--glass-border);
  text-align: center;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

.social-links a {
  width: 45px;
  height: 45px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.2rem;
  transition: all 0.3s ease;
}

.social-links a:hover {
  background: var(--primary-color);
  color: #fff;
  transform: translateY(-3px);
  border-color: transparent;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: #334155;
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: #475569;
}

@media (max-width: 1024px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .tools-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 4rem 0;
  }
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-10px);
  }

  100% {
    transform: translateY(0px);
  }
}

.float-animation {
  animation: float 4s ease-in-out infinite;
}