/* ================= VARIABLES & RESET ================= */
:root {
  --primary: #6366f1; /* Indigo 500 */
  --primary-dark: #4f46e5;
  --primary-light: #eef2ff;
  --secondary: #d946ef; /* Fuchsia 500 */
  --accent: #06b6d4; /* Cyan 500 */
  --dark: #0f172a;
  --dark-surface: #111827;
  --light: #f8fafc;
  --gray: #64748b;
  --gray-light: #cbd5e1;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 10px 30px -5px rgba(99, 102, 241, 0.3);
  --container: 1280px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background-color: #ffffff;
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--dark);
  line-height: 1.2;
  letter-spacing: -0.5px;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -5px rgba(99, 102, 241, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--primary-dark);
  border: 2px solid var(--primary-light);
}
.btn-outline:hover { 
  background: var(--primary-light); 
  border-color: var(--primary);
}

.section-padding { padding: 100px 0; }
.text-center { text-align: center; }

/* ================= NAVBAR ================= */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  padding: 12px 0;
}

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

.logo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.logo i {
  -webkit-text-fill-color: var(--primary);
  font-size: 1.4rem;
}

.nav-links {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--gray);
  font-size: 0.95rem;
  position: relative;
}
.nav-link:after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background: var(--primary);
  transition: width 0.3s;
}
.nav-link:hover, .nav-link.active { color: var(--dark); }
.nav-link:hover:after, .nav-link.active:after { width: 100%; }

.nav-actions { display: flex; gap: 16px; align-items: center; }
.hamburger { display: none; font-size: 1.5rem; cursor: pointer; color: var(--dark); background: none; border: none; }

/* ================= HERO & TOOL SECTION ================= */
.tool-top-section {
  padding-top: 120px;
  background: radial-gradient(circle at top right, rgba(217, 70, 239, 0.08), transparent 40%),
              radial-gradient(circle at bottom left, rgba(99, 102, 241, 0.08), transparent 40%);
  padding-bottom: 80px;
}

.hero-header {
  text-align: center;
  margin-bottom: 40px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-header h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-header p {
  font-size: 1.2rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto;
}

.tool-interface {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-width: 1000px;
  margin: 0 auto;
}

.tool-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--light);
}

.tool-header h3 {
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.tool-header h3 i { color: var(--primary); }

.tool-actions {
  display: flex;
  gap: 8px;
}

.tool-btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
  background: white;
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--gray);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.tool-btn-sm:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
}

.tool-btn-sm.danger:hover {
  border-color: #ef4444;
  color: #ef4444;
  background: #fef2f2;
}

.editor-wrapper {
  position: relative;
  background: white;
}

textarea#mainEditor {
  width: 100%;
  height: 350px;
  padding: 24px;
  border: none;
  resize: vertical;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  outline: none;
  color: var(--dark);
  background: white;
}
textarea#mainEditor::placeholder { color: var(--gray-light); }

.stats-bar {
  background: var(--dark-surface);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #94a3b8;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
}
.stats-bar div { display: flex; align-items: center; gap: 6px; }
.stats-bar i { color: var(--secondary); }

.tools-controls {
  padding: 20px 24px;
  background: white;
  border-top: 1px solid var(--border);
}

.toolbar-group {
  margin-bottom: 16px;
}
.toolbar-group:last-child { margin-bottom: 0; }
.toolbar-group-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray);
  margin-bottom: 8px;
  font-weight: 700;
}

.unified-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.action-btn {
  padding: 8px 14px;
  background: white;
  color: var(--dark);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.action-btn i { font-size: 0.8rem; color: var(--primary); transition: var(--transition); }

.action-btn:hover {
  background: var(--dark);
  color: white;
  border-color: var(--dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.action-btn:hover i { color: var(--secondary); }

/* ================= INTRO SECTION ================= */
.page-intro {
  padding: 80px 0;
  background: var(--light);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.intro-content h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}
.intro-content p {
  font-size: 1.1rem;
  color: var(--gray);
  margin-bottom: 20px;
}

.about-box {
  background: white;
  border: 1px solid var(--border);
  padding: 32px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.about-box:before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 6px; height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
}
.about-box h4 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.about-box p { font-size: 0.95rem; color: var(--gray); margin-bottom: 0; }

/* ================= TOOLS LIST SECTION ================= */
.tools-list-section {
  padding: 100px 0;
  background: white;
}

.master-list-header {
  text-align: center;
  margin-bottom: 60px;
}
.master-list-header h2 { font-size: 2.5rem; margin-bottom: 12px; }
.master-list-header p { color: var(--gray); font-size: 1.1rem; }

.tools-category {
  margin-bottom: 50px;
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition);
}
.tools-category:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.category-header {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.category-header i {
  width: 40px; height: 40px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}

.tools-grid-container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px 24px;
}

.tool-link-item {
  font-size: 0.95rem;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  transition: var(--transition);
}
.tool-link-item:before {
  content: '•';
  color: var(--gray-light);
  transition: var(--transition);
}
.tool-link-item:hover {
  color: var(--primary-dark);
  font-weight: 600;
  transform: translateX(4px);
}
.tool-link-item:hover:before {
  color: var(--secondary);
}

/* ================= FOOTER ================= */
footer {
  background: var(--dark-surface);
  color: #94a3b8;
  padding: 80px 0 30px;
  font-size: 0.95rem;
  position: relative;
  overflow: hidden;
}
footer:before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand h3 { 
  color: white; font-size: 1.5rem; margin-bottom: 20px; display: flex; align-items: center; gap: 8px;
  font-family: 'Plus Jakarta Sans', sans-serif;
}
.footer-brand p { margin-bottom: 24px; max-width: 300px; line-height: 1.7; }

.social-links { display: flex; gap: 12px; }
.social-links a { 
  width: 40px; height: 40px; border-radius: 12px; 
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center; 
  transition: var(--transition);
  color: #94a3b8;
}
.social-links a:hover { 
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-color: transparent;
  transform: translateY(-3px);
}

.footer-col h4 { color: white; margin-bottom: 20px; font-size: 1.1rem; font-family: 'Plus Jakarta Sans', sans-serif; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a:hover { color: white; padding-left: 5px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 30px;
  text-align: center;
  font-size: 0.9rem;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 1024px) {
  .tools-grid-container { grid-template-columns: repeat(3, 1fr); }
  .hero-header h1 { font-size: 2.8rem; }
}
@media (max-width: 768px) {
  .nav-links, .nav-actions .btn { display: none; }
  .hamburger { display: block; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    background: white;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
  }
  
  .hero-header h1 { font-size: 2.2rem; }
  .hero-header p { font-size: 1rem; }
  
  .tool-header { flex-direction: column; align-items: flex-start; gap: 12px; }
  .tool-actions { width: 100%; flex-wrap: wrap; }
  
  .intro-grid { grid-template-columns: 1fr; gap: 30px; }
  
  .tools-grid-container { grid-template-columns: repeat(2, 1fr); }
  
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}