/* ========================================
   PREMIUM SEO AGENCY - DESIGN SYSTEM
   Apple-inspired Minimalist Design
   ======================================== */

:root {
  /* Colors */
  --color-primary: #0071E3;
  --color-primary-dark: #005BB5;
  --color-primary-light: #4DA6FF;
  
  --color-text-main: #1D1D1F;
  --color-text-secondary: #86868B;
  --color-text-tertiary: #C2C2C5;
  
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F5F5F7;
  --color-bg-tertiary: #EBEBEF;
  
  --color-border-light: rgba(0, 0, 0, 0.1);
  --color-border-medium: rgba(0, 0, 0, 0.15);
  
  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-weight: 400;
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text-main);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text-main);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(3rem, 8vw, 5rem); }
h2 { font-size: clamp(2.25rem, 6vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 4vw, 2rem); }

p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

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

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

/* ========================================
   LAYOUT UTILITIES
   ======================================== */

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-4xl) 0;
}

.section-sm {
  padding: var(--space-3xl) 0;
}

.section-lg {
  padding: var(--space-2xl) 0;
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-main);
  letter-spacing: -0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--transition-fast);
}

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

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

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-menu-line {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-main);
  transition: all var(--transition-base);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 113, 227, 0.4);
}

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

.btn-secondary:hover {
  background-color: rgba(0, 113, 227, 0.05);
  transform: translateY(-2px);
}

.btn-large {
  padding: 1.25rem 3rem;
  font-size: var(--text-base);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.hero-content {
  max-width: 900px;
}

.hero-title {
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ========================================
   CARDS & CONTAINERS
   ======================================== */

.card {
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

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

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

/* ========================================
   FEATURES & BENEFITS
   ======================================== */

.feature-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-lg);
  background-color: rgba(0, 113, 227, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.feature-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-description {
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ========================================
   SERVICES SECTION
   ======================================== */

.services-section {
  background-color: var(--color-bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-3xl);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.service-card {
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.service-icon-wrapper {
  width: 70px;
  height: 70px;
  border-radius: var(--radius-full);
  background-color: rgba(0, 113, 227, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
}

.service-icon-wrapper svg {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}

/* ========================================
   INDUSTRIES SECTION
   ======================================== */

.industries-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.industry-card {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: all var(--transition-base);
}

.industry-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.industry-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

/* ========================================
   WORKFLOW SECTION
   ======================================== */

.workflow-section {
  background-color: var(--color-bg-secondary);
}

.workflow-step {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.step-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: 600;
  margin: 0 auto var(--space-md);
}

.step-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

/* ========================================
   FAQ SECTION
   ======================================== */

.faq-item {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-md);
  transition: all var(--transition-base);
}

.faq-item:hover {
  box-shadow: var(--shadow-sm);
}

.faq-question {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--space-sm);
}

/* ========================================
   CTA SECTION
   ======================================== */

.cta-section {
  background-color: var(--color-primary);
  color: white;
  text-align: center;
}

.cta-content h2 {
  color: white;
  margin-bottom: var(--space-md);
}

.cta-content p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

.cta-button {
  background-color: white;
  color: var(--color-primary);
}

/* ========================================
   CONTACT FORM SECTION
   ======================================== */

.contact-section {
  max-width: 800px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-main);
  margin-bottom: var(--space-xs);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  font-size: var(--text-base);
  font-family: inherit;
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-primary);
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

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

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background-color: var(--color-bg-secondary);
  padding-top: var(--space-3xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  font-size: var(--text-sm);
  max-width: 280px;
}

.footer-column h4 {
  font-size: var(--text-sm);
  color: var(--color-text-main);
  margin-bottom: var(--space-md);
}

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

.footer-links li {
  margin-bottom: var(--space-xs);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border-light);
  padding-top: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-text {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* ========================================
   ABOUT PAGE SPECIFIC
   ======================================== */

.about-hero {
  padding-top: 120px;
  background-color: var(--color-bg-secondary);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-section {
  margin-bottom: var(--space-4xl);
}

.about-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-lg);
}

.about-text {
  font-size: var(--text-lg);
  line-height: 1.8;
}

.about-highlight {
  color: var(--color-primary);
  font-weight: 600;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-3xl);
}

.value-card {
  background-color: var(--color-bg-secondary);
  padding: var(--space-2xl);
  border-radius: var(--radius-lg);
}

.value-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

/* ========================================
   ORDER PAGE SPECIFIC
   ======================================== */

.order-hero {
  padding-top: 120px;
  background-color: var(--color-bg-secondary);
}

.order-form-container {
  max-width: 750px;
  margin: 0 auto;
}

.order-intro {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.order-intro h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--space-md);
}

.order-intro p {
  font-size: var(--text-lg);
}

/* ========================================
   RESPONSIVE DESIGN - TABLET & BELOW
   ======================================== */

@media (max-width: 1024px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .industries-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--color-bg-primary);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
    transform: translateY(-150%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    transform: translateY(0);
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand p,
  .footer-bottom {
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  :root {
    --space-xl: 1.5rem;
    --space-2xl: 2.5rem;
    --space-3xl: 3.5rem;
    --space-4xl: 5rem;
  }
  
  .hero-title {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }
  
  .section {
    padding: var(--space-3xl) 0;
  }
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease forwards;
}

/* Staggered animations for grid items */
.grid-2 > *,
.grid-3 > *,
.grid-4 > * {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.grid-2 > *:nth-child(1),
.grid-3 > *:nth-child(1),
.grid-4 > *:nth-child(1) {
  animation-delay: 0ms;
}

.grid-2 > *:nth-child(2),
.grid-3 > *:nth-child(2),
.grid-4 > *:nth-child(2) {
  animation-delay: 60ms;
}

.grid-2 > *:nth-child(3),
.grid-3 > *:nth-child(3),
.grid-4 > *:nth-child(3) {
  animation-delay: 120ms;
}

.grid-2 > *:nth-child(4),
.grid-3 > *:nth-child(4),
.grid-4 > *:nth-child(4) {
  animation-delay: 180ms;
}

/* ========================================
   FORM ANIMATIONS (Form Handler)
   ======================================== */

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

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

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

/* ========================================
   UTILITY CLASSES
   ======================================== */

.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.mb-xl { margin-bottom: var(--space-3xl); }
.mb-lg { margin-bottom: var(--space-2xl); }
.mb-md { margin-bottom: var(--space-xl); }

/* Smooth scroll for anchor links */
html {
  scroll-padding-top: 100px;
}
.modal-overlay{

position:fixed;

inset:0;

background:rgba(0,0,0,.45);

backdrop-filter:blur(5px);

display:flex;

justify-content:center;

align-items:center;

opacity:0;

visibility:hidden;

transition:.35s;

z-index:9999;

}

.modal-overlay.show{

opacity:1;

visibility:visible;

}

.modal-window{

background:#fff;

border-radius:20px;

padding:40px;

width:90%;

max-width:500px;

text-align:center;

box-shadow:0 25px 80px rgba(0,0,0,.2);

transform:translateY(20px) scale(.95);

transition:.35s;

}

.modal-overlay.show .modal-window{

transform:translateY(0) scale(1);

}

.modal-icon{

width:80px;

height:80px;

margin:auto;

border-radius:50%;

display:flex;

justify-content:center;

align-items:center;

font-size:42px;

font-weight:bold;

color:#fff;

margin-bottom:20px;

}

.modal-icon.success{

background:#22c55e;

}

.modal-icon.error{

background:#ef4444;

}

.modal-window h2{

margin:10px 0;

font-size:30px;

}

.modal-window p{

color:#666;

line-height:1.7;

}

.modal-telegram{

margin-top:25px;

padding-top:20px;

border-top:1px solid #eee;

font-size:15px;

color:#666;

}

.modal-telegram a{

color:#2563eb;

font-weight:600;

text-decoration:none;

}

.modal-telegram a:hover{

text-decoration:underline;

}

.modal-button{

margin-top:30px;

padding:14px 34px;

border:none;

border-radius:12px;

background:#111827;

color:white;

font-size:16px;

cursor:pointer;

transition:.25s;

}

.modal-button:hover{

transform:translateY(-2px);

background:#000;

}