/* 
   Quality Diamond Blades - Premium Dual-Theme System
   Optimized with Glassmorphism, Micro-Animations, and High Aesthetics
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Outfit:wght@500;600;700;800&display=swap');

/* --- THEME VARIABLES --- */

/* Default: Dark Theme */
:root {
  --bg-primary: #0A0D14;
  --bg-secondary: #131826;
  --bg-tertiary: #1E2538;
  --accent: #FF5A09; /* Hot Industrial Orange */
  --accent-hover: #FF7B33;
  --accent-glow: rgba(255, 90, 9, 0.4);
  --text-primary: #F9FAFB;
  --text-secondary: #D1D5DB;
  --text-muted: #9CA3AF;
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glass: 1px solid rgba(255, 255, 255, 0.08);
  --bg-glass: rgba(19, 24, 38, 0.65);
  --shadow-base: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 4px 20px rgba(255, 90, 9, 0.15);
  --success: #10B981;
  --overlay: rgba(10, 13, 20, 0.8);
  
  /* Shared tokens */
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

/* Light Theme overrides */
[data-theme="light"] {
  --bg-primary: #F3F4F6;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #E5E7EB;
  --accent: #E04E07; 
  --accent-hover: #C54406;
  --accent-glow: rgba(224, 78, 7, 0.3);
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6B7280;
  --border-color: rgba(0, 0, 0, 0.1);
  --border-glass: 1px solid rgba(0, 0, 0, 0.05);
  --bg-glass: rgba(255, 255, 255, 0.75);
  --shadow-base: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 4px 20px rgba(224, 78, 7, 0.1);
  --overlay: rgba(243, 244, 246, 0.8);
}

/* --- 1. Global Reset & Base Setup --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.5s ease, color 0.5s ease;
  position: relative;
}

/* Premium Animated Mesh Background */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, var(--accent-glow) 0%, transparent 40%),
              radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.1) 0%, transparent 40%);
  z-index: -1;
  animation: mesh-rotate 40s linear infinite;
  pointer-events: none;
  opacity: 0.6;
}

@keyframes mesh-rotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* --- 2. Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

h1 { font-size: 2.75rem; margin-bottom: var(--space-sm); }
h2 { font-size: 2.25rem; margin-bottom: var(--space-md); }
h3 { font-size: 1.5rem; margin-bottom: var(--space-sm); }
p { margin-bottom: var(--space-md); color: var(--text-secondary); font-size: 1.125rem; }

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

a:hover {
  color: var(--accent-hover);
  text-shadow: 0 0 8px var(--accent-glow);
}

/* --- 3. Premium Glass & Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-muted { color: var(--text-muted); }

.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: var(--border-glass);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-base);
  transition: var(--transition);
}

.glass-panel:hover {
  border-color: rgba(255, 90, 9, 0.3);
  box-shadow: var(--shadow-glow);
}

.grid { display: grid; gap: var(--space-lg); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  h1 { font-size: 4rem; }
  h2 { font-size: 3rem; }
}

/* Animations */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- 4. Premium Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: 50px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: #fff !important;
  box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px var(--accent-glow);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  color: var(--text-primary);
  border: var(--border-glass);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  transform: translateY(-3px);
}

/* --- 5. Header & Navigation --- */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: var(--border-glass);
  padding: 1rem 0;
  transition: background-color 0.5s ease;
}

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

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.75rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.nav-menu {
  display: none;
  list-style: none;
  gap: var(--space-md);
  align-items: center;
}

@media (min-width: 992px) {
  .nav-menu { display: flex; }
}

.nav-link {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 1.05rem;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--accent);
  transition: width 0.3s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

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

/* Theme Toggle Button */
.theme-toggle {
  background: var(--bg-tertiary);
  border: var(--border-glass);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--accent);
  color: #fff;
  transform: rotate(15deg);
}

/* Burger Menu Trigger */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: 3px;
  transition: var(--transition);
}

@media (min-width: 992px) {
  .menu-toggle { display: none; }
}

/* --- 6. Mobile Navigation Sidebar --- */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 320px;
  max-width: 100%;
  height: 100vh;
  background-color: var(--overlay);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  z-index: 200;
  padding: var(--space-xl) var(--space-md) var(--space-md);
  transition: right 0.5s cubic-bezier(0.77, 0, 0.175, 1);
  box-shadow: -20px 0 50px rgba(0,0,0,0.5);
  border-left: var(--border-glass);
}

.mobile-nav.open { right: 0; }

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.mobile-nav-link {
  font-size: 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
}

.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--bg-tertiary);
  border: var(--border-glass);
  width: 40px; height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* --- 7. Sections & Hero --- */
.section { padding: 6rem 0; }

.hero-section {
  position: relative;
  padding: 8rem 0 6rem;
  overflow: hidden;
}

.hero-subtitle {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--bg-glass);
  border: var(--border-glass);
  border-radius: 50px;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: var(--space-md);
  box-shadow: var(--shadow-glow);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.blade-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 50%;
  z-index: 2;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.4));
  animation: slow-rotate 40s linear infinite;
}

/* --- 8. Premium SaaS Pricing Table --- */
.pricing-wrapper {
  overflow-x: auto;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: var(--border-glass);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  box-shadow: var(--shadow-base);
}

.pricing-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 8px;
  min-width: 800px;
}

.pricing-table th {
  padding: 1rem;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
}

.pricing-table td {
  padding: 1rem;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.pricing-table tr td:first-child {
  border-top-left-radius: var(--radius-sm);
  border-bottom-left-radius: var(--radius-sm);
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 1.125rem;
}

.pricing-table tr td:last-child {
  border-top-right-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  text-align: right;
}

.pricing-table tr {
  transition: var(--transition);
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.pricing-table tr:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-glow);
  z-index: 10;
  position: relative;
}

.price-tag {
  color: var(--accent);
  font-size: 1.25rem;
  font-weight: 800;
  font-family: var(--font-display);
}

/* --- 9. Trust Strip (Pills) --- */
.trust-strip {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  padding: var(--space-md) 0;
  border-top: var(--border-glass);
  border-bottom: var(--border-glass);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--bg-secondary);
  border: var(--border-glass);
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  transition: var(--transition);
}

.trust-pill:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.trust-icon {
  color: var(--accent);
  font-size: 1.125rem;
}

/* --- 10. Forms & Inputs --- */
input, select, textarea {
  width: 100%;
  padding: 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

/* --- 11. FAQ Component --- */
.faq-item {
  background-color: var(--bg-glass);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.faq-item[open] {
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}

.faq-question {
  padding: 1.25rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent);
  transition: var(--transition);
}
.faq-item[open] .faq-question::after { transform: rotate(45deg); }

.faq-answer {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-secondary);
}

/* --- 12. Footer --- */
footer {
  background-color: var(--bg-primary);
  border-top: var(--border-glass);
  padding: var(--space-xl) 0 var(--space-md);
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-muted);
  font-weight: 500;
}

.footer-link:hover { color: var(--accent); }

.footer-bottom {
  text-align: center;
  padding-top: var(--space-md);
  border-top: var(--border-glass);
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* --- 13. Interactive Tool Configurator --- */
.configurator-card {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  margin-top: var(--space-lg);
}

.config-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 992px) {
  .config-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.config-result-panel {
  background: rgba(0, 0, 0, 0.2);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 250px;
}

.config-param-spec {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 0;
}

/* --- 14. Responsive Specifications Tabs --- */
.tab-container {
  margin-top: var(--space-lg);
}

.tab-nav {
  display: flex;
  gap: var(--space-xs);
  border-bottom: 2px solid var(--border-color);
  margin-bottom: var(--space-md);
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  transition: var(--transition);
}

.tab-btn::after {
  content: '';
  position: absolute;
  width: 0;
  height: 3px;
  bottom: -2px;
  left: 0;
  background-color: var(--accent);
  transition: var(--transition);
}

.tab-btn.active {
  color: var(--text-primary);
}

.tab-btn.active::after {
  width: 100%;
}

.tab-pane {
  display: none;
  padding: var(--space-md) 0;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- 15. Header Cart Badge --- */
.header-cart-badge {
  background: var(--bg-tertiary);
  border: var(--border-glass);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.header-cart-badge:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.cart-icon-svg {
  width: 16px;
  height: 16px;
}

/* --- 16. Dropdown Menu for Blades --- */
.nav-menu li {
  position: relative;
}

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

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-secondary);
  border: var(--border-glass);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0;
  min-width: 250px;
  z-index: 1000;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  backdrop-filter: blur(12px);
}

.dropdown-menu li {
  width: 100%;
  padding: 0 !important;
  margin: 0 !important;
}

.dropdown-menu a {
  display: block;
  padding: 0.6rem 1.2rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
  text-align: left;
}

.dropdown-menu a:hover {
  background: var(--bg-tertiary);
  color: var(--accent);
}