/* style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --secondary: #10b981;
  --bg-color: #f8fafc;
  --surface: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

[data-theme="dark"] {
  --primary: #6366f1;
  --primary-hover: #818cf8;
  --bg-color: #0f172a;
  --surface: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border: #334155;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

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

ul {
  list-style: none;
}

/* Header & Nav */
header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
}

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

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background-color: var(--border);
}

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

/* Ad Sections */
.ad-banner {
  background-color: var(--surface);
  border: 1px dashed var(--border);
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  margin: 2rem auto;
  max-width: 728px;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 0.875rem;
}

.ad-sidebar {
  min-height: 250px;
  margin-top: 2rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 5rem 1.5rem;
  background: linear-gradient(to bottom, var(--surface) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-main);
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto 2.5rem;
}

/* Search Bar */
.search-container {
  max-width: 600px;
  margin: 0 auto 3rem;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 1rem 1.5rem 1rem 3rem;
  font-size: 1.1rem;
  border: 1px solid var(--border);
  border-radius: 50px;
  background-color: var(--surface);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* Tools Grid */
.tools-section {
  padding: 5rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

/* Tool Card */
.tool-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.tool-icon {
  width: 48px;
  height: 48px;
  background-color: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.tool-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.tool-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
}

.tool-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.tool-card:hover .tool-link::after {
  transform: translateX(4px);
}

/* Buttons & Forms - Reusable */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}

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

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background-color: var(--primary);
  color: #fff;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--surface);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

/* Footer */
footer {
  background-color: var(--surface);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h3 {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
  color: var(--text-main);
}

.footer-col ul li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  color: var(--text-muted);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Tool Detail Page Layout */
.tool-header {
  padding: 3rem 0;
  text-align: center;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
}

.tool-header h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.tool-workspace {
  background-color: var(--surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 3rem;
}

.result-box {
  background-color: var(--bg-color);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  display: none;
}

.result-box.active {
  display: block;
}

.content-section {
  background-color: var(--surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  padding: 3rem;
  margin-bottom: 3rem;
}

.content-section h2 {
  font-size: 1.75rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.content-section h2:first-child {
  margin-top: 0;
}

.content-section h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.content-section p, .content-section ul, .content-section ol {
  margin-bottom: 1.25rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.content-section ul, .content-section ol {
  padding-left: 1.5rem;
}

.layout-sidebar {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 2rem;
  align-items: start;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--surface);
    flex-direction: column;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

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

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

  .hero h1 {
    font-size: 2rem;
  }

  .layout-sidebar {
    grid-template-columns: 1fr;
  }
}