/* ==============================================
   Multi Tools - Main Stylesheet
   Dark/Light Mode Support with Smooth Transitions
   ============================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700;800&display=swap');

/* ==============================================
   CSS Variables - Dark Mode (Default)
   ============================================== */
:root {
  /* Primary Colors */
  --primary: #18ffff;
  --primary-alt: #00ffc6;
  --accent: #fe38f6;
  --gradient: linear-gradient(90deg, #18ffff 0%, #00ffc6 60%, #fe38f6 100%);
  
  /* Surface Colors */
  --surface: #12181c;
  --card: #181e23;
  --card-hover: #1f252b;
  --nav-bg: rgba(18, 24, 28, 0.95);
  --footer-bg: #0d1114;
  
  /* Text Colors */
  --text-primary: #eafdff;
  --text-secondary: #abf1f9;
  --text-muted: #99f1ee;
  --text-dark: #181e23;
  
  /* Border & Shadow */
  --border-color: #00ffd124;
  --shadow-sm: 0 0 10px #19ffff38;
  --shadow-md: 0 0 13px #00ffd126;
  --shadow-lg: 0 0 32px #18ffff99, 0 8px 28px #00ffc644;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ==============================================
   Light Mode Variables
   ============================================== */
[data-theme="light"] {
  /* Primary Colors - Adjusted for light mode */
  --primary: #00b8d4;
  --primary-alt: #00e676;
  --accent: #d500f9;
  --gradient: linear-gradient(90deg, #00b8d4 0%, #00e676 60%, #d500f9 100%);
  
  /* Surface Colors */
  --surface: #f5f9fa;
  --card: #ffffff;
  --card-hover: #f0f7f9;
  --nav-bg: rgba(255, 255, 255, 0.95);
  --footer-bg: #e8f4f6;
  
  /* Text Colors */
  --text-primary: #1a2630;
  --text-secondary: #2c3e50;
  --text-muted: #546e7a;
  --text-dark: #0d1114;
  
  /* Border & Shadow */
  --border-color: #00b8d433;
  --shadow-sm: 0 2px 8px rgba(0, 184, 212, 0.15);
  --shadow-md: 0 4px 12px rgba(0, 184, 212, 0.2);
  --shadow-lg: 0 8px 24px rgba(0, 184, 212, 0.25), 0 4px 12px rgba(0, 230, 118, 0.15);
}

/* ==============================================
   Reset & Base Styles
   ============================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text-primary);
  font-family: 'Space Grotesk', Arial, sans-serif;
  min-height: 100vh;
  transition: background var(--transition-normal), color var(--transition-normal);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==============================================
   Navigation Bar
   ============================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1.5px solid var(--border-color);
  padding: 0.75rem 2rem;
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

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

.nav-menu li a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

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

.nav-menu li a:hover,
.nav-menu li a.active {
  color: var(--primary);
}

.nav-menu li a:hover::after,
.nav-menu li a.active::after {
  width: 100%;
}

/* Theme Toggle Button */
.theme-toggle {
  background: var(--card);
  border: 1.5px solid var(--primary);
  border-radius: 50px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 600;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
  background: var(--card-hover);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(8px, -8px);
}

/* ==============================================
   Hero Section
   ============================================== */
.hero {
  text-align: center;
  padding: 4rem 1rem 3rem 1rem;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: var(--gradient);
  filter: blur(120px);
  opacity: 0.15;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.15; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.25; transform: translateX(-50%) scale(1.1); }
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: 1rem;
  animation: fadeInUp 0.8s ease;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto 2rem auto;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  animation: fadeInUp 0.8s ease 0.4s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ==============================================
   Buttons
   ============================================== */
.btn {
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-block;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  font-family: 'Space Grotesk', Arial, sans-serif;
  letter-spacing: 0.3px;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-dark);
  box-shadow: 0 0 20px rgba(24, 255, 255, 0.4);
}

.btn-primary:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 5px 25px rgba(254, 56, 246, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--text-dark);
  transform: translateY(-2px);
}

/* ==============================================
   Search Bar
   ============================================== */
.search-bar {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
  padding: 0 1rem;
}

.search-input {
  width: 100%;
  max-width: 500px;
  padding: 0.9rem 1.5rem;
  border-radius: 50px;
  background: var(--card);
  color: var(--text-primary);
  font-size: 1.1rem;
  border: 1.5px solid var(--primary);
  box-shadow: var(--shadow-sm);
  outline: none;
  transition: all var(--transition-fast);
  font-family: 'Space Grotesk', Arial, sans-serif;
}

.search-input:focus {
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}

.search-input::placeholder {
  color: var(--text-muted);
}

/* ==============================================
   Categories
   ============================================== */
.categories {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem 1.2rem;
  margin: 0 auto 2rem auto;
  max-width: 1200px;
  padding: 0 1rem;
}

.cat {
  background: var(--card);
  color: var(--primary);
  border-radius: 20px;
  padding: 0.5rem 1.5rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  border: 1.5px solid var(--border-color);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cat:hover {
  background: var(--primary);
  color: var(--text-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ==============================================
   Tool Grid
   ============================================== */
.tool-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  max-width: 1400px;
  margin: 0 auto 3rem auto;
  padding: 2rem 1.5rem;
}

.tool-card {
  background: var(--card);
  border-radius: 20px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 200px;
  border: 1.5px solid var(--primary);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: all var(--transition-normal);
  overflow: hidden;
  animation: fadeIn 0.6s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.tool-card:nth-child(1) { animation-delay: 0.05s; }
.tool-card:nth-child(2) { animation-delay: 0.1s; }
.tool-card:nth-child(3) { animation-delay: 0.15s; }
.tool-card:nth-child(4) { animation-delay: 0.2s; }
.tool-card:nth-child(5) { animation-delay: 0.25s; }
.tool-card:nth-child(6) { animation-delay: 0.3s; }

.tool-card::before {
  content: '';
  position: absolute;
  z-index: 0;
  width: 100px;
  height: 70px;
  left: -30px;
  top: -35px;
  background: var(--gradient);
  filter: blur(25px);
  opacity: 0.2;
  transition: opacity var(--transition-normal);
}

.tool-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px) scale(1.02);
  border-color: var(--accent);
}

.tool-card:hover::before {
  opacity: 0.35;
}

.tool-card h3 {
  margin: 0 0 0.3rem 0;
  font-size: 1.2rem;
  font-weight: 700;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  line-height: 1.3;
  z-index: 1;
}

.meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 1;
}

.tool-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin: 0 0 1rem 0;
  flex-grow: 1;
  z-index: 1;
  line-height: 1.6;
}

.cta {
  margin-top: auto;
  background: var(--primary);
  color: var(--text-dark);
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  box-shadow: 0 0 15px rgba(24, 255, 255, 0.4);
  padding: 0.5rem 1.5rem;
  display: inline-block;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1;
}

.cta:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(254, 56, 246, 0.6);
}

/* ==============================================
   FAQ Section
   ============================================== */
.faq-section {
  max-width: 900px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}

.faq-section h2 {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: 2.5rem;
  letter-spacing: -1px;
}

.faq-item {
  background: var(--card);
  border: 1.5px solid var(--border-color);
  border-radius: 15px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: 1.3rem 1.5rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 1.5rem;
  color: var(--primary);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-normal);
  padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 1.5rem 1.5rem 1.5rem;
}

.faq-answer p {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}

/* ==============================================
   Footer
   ============================================== */
footer {
  background: var(--footer-bg);
  padding: 3rem 2rem 1.5rem 2rem;
  border-top: 1.5px solid var(--border-color);
  color: var(--text-secondary);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2.5rem;
  margin-bottom: 2rem;
}

.footer-column h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
}

.footer-logo {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: 0.5rem;
  display: block;
}

.footer-column p {
  line-height: 1.7;
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.7rem;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer-links a:hover {
  color: var(--primary);
  transform: translateX(5px);
}

.social-icons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.2rem;
  text-decoration: none;
  border: 1.5px solid var(--primary);
  transition: all var(--transition-fast);
}

.social-icon:hover {
  background: var(--primary);
  color: var(--text-dark);
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-md);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ==============================================
   Content Pages (About, Contact, Privacy, Disclaimer)
   ============================================== */
.page-hero {
  text-align: center;
  padding: 3rem 1rem 2rem 1rem;
  background: var(--surface);
}

.page-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.page-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 700px;
  margin: 0 auto;
}

.content-section {
  max-width: 1000px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}

.content-section h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 2.5rem 0 1rem 0;
  position: relative;
  padding-bottom: 0.5rem;
}

.content-section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient);
}

.content-section h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary);
  margin: 2rem 0 1rem 0;
}

.content-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}

.content-section ul,
.content-section ol {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 1rem 0 1.5rem 2rem;
  font-size: 1.05rem;
}

.content-section li {
  margin-bottom: 0.5rem;
}

.content-section strong {
  color: var(--primary);
  font-weight: 600;
}

/* Contact Form */
.contact-form {
  background: var(--card);
  border: 1.5px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  max-width: 700px;
  margin: 2rem auto;
  box-shadow: var(--shadow-md);
}

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

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

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.9rem 1.2rem;
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
  font-size: 1rem;
  font-family: 'Space Grotesk', Arial, sans-serif;
  transition: all var(--transition-fast);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-error {
  color: var(--accent);
  font-size: 0.9rem;
  margin-top: 0.3rem;
  display: none;
}

.form-group.error .form-error {
  display: block;
}

.form-group.error input,
.form-group.error textarea {
  border-color: var(--accent);
}

.contact-info {
  background: var(--card);
  border: 1.5px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  max-width: 700px;
  margin: 2rem auto;
  box-shadow: var(--shadow-md);
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--text-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-info-text h3 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.contact-info-text p {
  margin: 0;
  color: var(--text-secondary);
}

.contact-info-text a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.contact-info-text a:hover {
  color: var(--accent);
}

/* ==============================================
   Responsive Design
   ============================================== */
@media (max-width: 968px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background: var(--nav-bg);
    width: 100%;
    text-align: center;
    transition: left var(--transition-normal);
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.3);
    padding: 2rem 0;
    gap: 1.5rem;
    border-bottom: 1.5px solid var(--border-color);
    backdrop-filter: blur(10px);
  }

  .nav-menu.active {
    left: 0;
  }

  .hamburger {
    display: flex;
  }

  .theme-toggle {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
  }

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

  .hero p {
    font-size: 1.1rem;
  }

  .tool-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.2rem;
  }

  .footer-container {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
  }
}

@media (max-width: 600px) {
  .navbar {
    padding: 0.75rem 1rem;
  }

  .nav-container {
    gap: 1rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .tool-grid {
    grid-template-columns: 1fr;
    padding: 1.5rem 1rem;
  }

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

  .faq-section h2 {
    font-size: 2rem;
  }

  .categories {
    gap: 0.6rem;
  }

  .cat {
    font-size: 0.85rem;
    padding: 0.4rem 1rem;
  }

  .btn {
    padding: 0.65rem 1.5rem;
    font-size: 1rem;
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ==============================================
   Utility Classes
   ============================================== */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.hidden {
  display: none !important;
}

/* Loading Animation */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}