/* ============================================
   OmitraTema - Modern Design System v2.0
   ============================================ */

/* === CSS Variables & Design Tokens === */
:root {
  /* Color Palette */
  --color-primary: #0284c7;
  --color-primary-dark: #0369a1;
  --color-primary-light: #38bdf8;

  --color-secondary: #10b981;
  --color-secondary-dark: #059669;

  --color-accent: #8b5cf6;
  --color-accent-dark: #7c3aed;

  --color-rose: #f43f5e;
  --color-amber: #f59e0b;

  /* Neutrals */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
}

/* === Base Styles === */
* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  background: #ffffff;
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

/* === Typography === */
h1,
.h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-gray-900);
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h2,
.h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-gray-900);
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h3,
.h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
  margin: 0;
  line-height: 1.3;
}

.lead {
  color: var(--color-gray-600);
  margin-top: var(--spacing-sm);
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.7;
  font-weight: var(--font-weight-normal);
}

/* === Layout === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

body {
  padding-top: 72px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* === Header === */
header.omitra-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.omitra-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  position: relative;
}

/* Logo */
.logo-fixed-left {
  display: flex;
  align-items: center;
  text-decoration: none;
  z-index: 10;
  transition: transform 0.2s ease;
}

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

.logo-mark {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
  transition: all var(--transition-base);
}

.logo-fixed-left:hover .logo-mark {
  box-shadow: 0 6px 16px rgba(2, 132, 199, 0.4);
}

.logo-mark i {
  color: #ffffff;
  font-size: 22px;
}

.logo-text {
  font-size: 20px;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Desktop Navigation - Centered */
.desktop-nav {
  display: none;
  justify-content: center;
  gap: 0.25rem;
}

@media (min-width: 1024px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #475569;
  text-decoration: none;
  border-radius: 0.75rem;
  transition: all 0.2s ease;
  position: relative;
  white-space: nowrap;
}

.nav-item i {
  font-size: 1rem;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.nav-item:hover {
  color: #0284c7;
  background: rgba(14, 165, 233, 0.08);
}

.nav-item:hover i {
  opacity: 1;
}

.nav-item.active {
  color: #0284c7;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(56, 189, 248, 0.1) 100%);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 0.25rem;
  left: 0.875rem;
  right: 0.875rem;
  height: 2px;
  background: linear-gradient(90deg, #0284c7, #0ea5e9);
  border-radius: 2px;
}

#nav-omitra.nav-item.active::after {
  background: var(--color-primary);
}

#nav-nivusoft.nav-item.active::after {
  background: var(--color-secondary);
}

#nav-perfect.nav-item.active::after {
  background: var(--color-accent);
}

#nav-nessasms.nav-item.active::after {
  background: var(--color-rose);
}

#nav-moduller.nav-item.active::after {
  background: var(--color-amber);
}

#nav-gelecek.nav-item.active::after {
  background: #0f766e;
}

/* WhatsApp Button - Fixed Right */
.cta-fixed-right {
  display: none;
}

@media (min-width: 1024px) {
  .cta-fixed-right {
    display: block;
  }
}

.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #059669;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 0.625rem;
  text-decoration: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.whatsapp-btn:hover {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #047857;
}

.whatsapp-btn i {
  font-size: 1.125rem;
}

/* Mobile Toggle */
.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: none;
  color: #475569;
  cursor: pointer;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

@media (min-width: 1024px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-toggle:hover {
  background: rgba(148, 163, 184, 0.1);
  color: #0284c7;
}

/* Mobile Menu */
#mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: calc(100vh - 70px);
  overflow-y: auto;
}

#mobile-menu.show {
  text-decoration: none;
  display: block;
  padding: 14px var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: var(--font-weight-medium);
}

#mobile-menu a:hover {
  background: var(--color-gray-50);
  color: var(--color-primary);
}

#mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
}

#mobile-menu-overlay.show {
  display: block;
  animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@media (max-width: 767px) {
  .desktop-nav {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .mobile-toggle {
    display: none !important;
  }
}

/* === Cards === */
.theme-card {
  transition: all var(--transition-base);
  background: #ffffff;
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  position: relative;
}

.theme-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.theme-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-gray-300);
}

.theme-card:hover::before {
  opacity: 1;
}

.image-overlay {
  position: relative;
  overflow: hidden;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-gray-50) 0%, #ffffff 100%);
}

.image-overlay img {
  transition: transform var(--transition-slow);
  object-fit: contain;
  max-width: 100%;
  height: 100%;
}

.theme-card:hover .image-overlay img {
  transform: scale(1.05);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-size: 15px;
  line-height: 1.5;
}

.btn-primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(2, 132, 199, 0.4);
}

.btn-secondary {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

.btn-secondary:hover {
  background: var(--color-gray-200);
  transform: translateY(-2px);
}

.btn-disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* === Grid System === */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
}

@media (max-width: 640px) {
  .grid-3 {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}

@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* === Badges & Tags === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-200);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-semibold);
  font-size: 14px;
}

.sale-badge {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-weight: var(--font-weight-bold);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35);
  font-size: 13px;
}

.price-tag {
  font-variant-numeric: tabular-nums;
  font-weight: var(--font-weight-extrabold);
}

/* === Sections === */
.section-pad {
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

@media (max-width: 768px) {
  .section-pad {
    padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
  }
}

/* === Footer === */
.omitra-footer {
  background: linear-gradient(135deg, #0b1220 0%, #1a1f2e 100%);
  color: #9aa4b2;
  margin-top: auto;
  padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-title {
  color: #ffffff;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  font-size: 18px;
}

.footer-text {
  font-size: 14px;
  line-height: 1.7;
  color: #9aa4b2;
}

.footer-link {
  color: #9aa4b2;
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #9aa4b2;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

/* === Utility Classes === */
.transition-smooth {
  transition: all var(--transition-base);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* === Animations === */
@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.7;
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }

  100% {
    background-position: 1000px 0;
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* === Responsive Utilities === */
@media (max-width: 640px) {
  :root {
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 48px;
  }

  body {
    padding-top: 64px;
  }

  .header-row {
    height: 64px;
  }

  #mobile-menu {
    top: 64px;
    max-height: calc(100vh - 64px);
  }
}

/* === Accessibility === */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}