/* ==========================================================================
   Base Styles & Variables
   ========================================================================== */

:root {
  /* Colors */
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-surface-hover: #1e1e1e;
  --color-primary: #0052ff;
  --color-secondary: #00f0ff;
  --color-text: #ffffff;
  --color-text-muted: #a0a0a0;
  --color-border: rgba(255, 255, 255, 0.1);
  --color-glass: rgba(20, 20, 20, 0.6);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  --gradient-glow: linear-gradient(135deg, rgba(0, 82, 255, 0.5), rgba(0, 240, 255, 0.5));
  
  /* Shadows */
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(0, 82, 255, 0.3);
  --shadow-glow-hover: 0 0 30px rgba(0, 240, 255, 0.5);

  /* Typography */
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 1rem;
}

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

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 3rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-hover);
}

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

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-secondary);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all var(--transition-normal);
  padding: 1.5rem 0;
}

.header.scrolled {
  padding: 1rem 0;
  background: var(--color-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-link {
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.mega-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  width: 800px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.nav-item.dropdown:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.mega-menu-column h3 {
  font-size: 1rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}

.mega-menu-column ul li {
  margin-bottom: 0.5rem;
}

.mega-menu-column ul a {
  display: block;
  padding: 0.25rem 0;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.mega-menu-column ul a:hover {
  color: var(--color-secondary);
}

.search-bar {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 0.5rem 1rem;
  transition: border-color var(--transition-normal);
}

.search-bar:focus-within {
  border-color: var(--color-primary);
}

.search-bar input {
  background: transparent;
  border: none;
  color: var(--color-text);
  outline: none;
  padding-left: 0.5rem;
  width: 150px;
}

.search-bar i {
  color: var(--color-text-muted);
}

.hamburger {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: 12rem 2rem 6rem;
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: radial-gradient(circle at 20% 30%, rgba(0, 82, 255, 0.15) 0%, transparent 40%),
              radial-gradient(circle at 80% 70%, rgba(0, 240, 255, 0.15) 0%, transparent 40%);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 4rem;
  letter-spacing: -1px;
  margin-bottom: 1.5rem;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  max-width: 500px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
}

.hero-visuals {
  position: relative;
  height: 500px;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.floating-icon {
  position: absolute;
  width: 100px;
  height: 100px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  box-shadow: var(--shadow-lg), 0 0 20px rgba(0, 240, 255, 0.2) inset;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: float-rotate infinite linear;
}

.icon-pdf {
  color: #ff3366;
  top: 20%;
  left: 10%;
  animation-duration: 15s;
  animation-delay: 0s;
}

.icon-jpg {
  color: #00f0ff;
  bottom: 20%;
  right: 10%;
  animation-duration: 12s;
  animation-delay: -5s;
}

.icon-convert {
  color: #0052ff;
  top: 40%;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 120px;
  font-size: 4rem;
  animation-duration: 20s;
  animation-delay: -10s;
  z-index: 2;
  box-shadow: var(--shadow-glow);
}

@keyframes float-rotate {
  0% {
    transform: translateY(0) rotateX(0) rotateY(0) rotateZ(0);
  }
  25% {
    transform: translateY(-20px) rotateX(15deg) rotateY(15deg) rotateZ(90deg);
  }
  50% {
    transform: translateY(0) rotateX(0) rotateY(0) rotateZ(180deg);
  }
  75% {
    transform: translateY(20px) rotateX(-15deg) rotateY(-15deg) rotateZ(270deg);
  }
  100% {
    transform: translateY(0) rotateX(0) rotateY(0) rotateZ(360deg);
  }
}

/* ==========================================================================
   Cards & Layout
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid-3 {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: 0;
}

.tool-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow-hover);
  border-color: rgba(0, 240, 255, 0.5);
}

.tool-card > * {
  position: relative;
  z-index: 1;
}

.tool-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: rgba(0, 82, 255, 0.1);
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.tool-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.tool-card p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  flex-grow: 1;
}

/* ==========================================================================
   Tool Interface (Drag & Drop)
   ========================================================================== */
.tool-interface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-md);
}

.upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 4rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  background: rgba(255, 255, 255, 0.02);
}

.upload-area:hover, .upload-area.dragover {
  border-color: var(--color-primary);
  background: rgba(0, 82, 255, 0.05);
}

.upload-icon {
  font-size: 3rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.upload-area p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.upload-area input[type="file"] {
  display: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.footer-col p {
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: all var(--transition-normal);
}

.social-icon:hover {
  transform: translateY(-3px);
}

.social-icon.fb:hover { background: #1877F2; color: #fff; box-shadow: 0 0 15px #1877F2; }
.social-icon.tw:hover { background: #1DA1F2; color: #fff; box-shadow: 0 0 15px #1DA1F2; }
.social-icon.ig:hover { background: #E4405F; color: #fff; box-shadow: 0 0 15px #E4405F; }
.social-icon.li:hover { background: #0A66C2; color: #fff; box-shadow: 0 0 15px #0A66C2; }

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

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

.footer-links a:hover {
  color: var(--color-secondary);
  padding-left: 5px;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
}

.newsletter-form input {
  flex-grow: 1;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-normal);
}

.newsletter-form input:focus {
  border-color: var(--color-primary);
}

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