/* AnswerAce Landing Page - Complete Styles */

/* ===== CSS VARIABLES ===== */
:root {
  /* Основная палитра согласно спецификации */
  --electric-blue: #0066FF;
  --success-green: #10B981;
  --warning-orange: #FF6B35;
  --vibrant-orange: #FF6B35;
  --dark-blue: #1B365D;
  --light-gray: #F8FAFC;
  --medium-gray: #64748B;
  --white: #FFFFFF;
  
  /* Применение цветов */
  --primary-color: var(--electric-blue);    /* заголовки, основные элементы */
  --secondary-color: var(--dark-blue);      /* темный текст */
  --accent-color: var(--warning-orange);    /* CTA кнопки, акценты */
  --success-color: var(--success-green);    /* успех/позитив */
  
  /* Текст и фон */
  --text-color: var(--dark-blue);
  --text-light: var(--medium-gray);
  --bg-color: var(--white);
  --bg-light: var(--light-gray);
  --border-color: #e5e7eb;
  
  /* Градиенты согласно спецификации */
  --gradient-hero: linear-gradient(135deg, #F0F8FF 0%, #E0F2FE 100%);     /* Hero Background */
  --gradient-cta: linear-gradient(135deg, var(--electric-blue) 0%, var(--success-green) 100%);  /* Final CTA */
  --gradient-cards: linear-gradient(135deg, var(--electric-blue) 0%, #4F46E5 100%);    /* Cards/Elements */
  --gradient-competition: linear-gradient(135deg, var(--electric-blue) 0%, var(--success-green) 100%); /* Competition section */
  
  /* Типографика согласно спецификации */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-h1: 3.5rem;        /* 56px */
  --font-size-h1-mobile: 2.5rem; /* 40px */
  --font-size-h2: 2.5rem;        /* 40px */
  --font-size-h2-mobile: 2rem;   /* 32px */
  --font-size-h3: 1.5rem;        /* 24px */
  --font-size-xl: 1.25rem;       /* 20px */
  --font-size-lg: 1.125rem;      /* 18px */
  --font-size-base: 1rem;        /* 16px */
  --font-size-body: 1rem;        /* 16px */
  --font-size-sm: 0.875rem;      /* 14px */
  --font-size-small: 0.875rem;   /* 14px */
  
  /* Тени */
  --shadow: 0 4px 6px -1px rgba(0, 102, 255, 0.1);
  --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 20px 25px -5px rgba(0, 102, 255, 0.1);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-orange: 0 10px 40px rgba(255, 107, 53, 0.15);
  
  /* Размеры и отступы */
  --container-max-width: 1200px;
  --spacing-sm: 0.5rem;           /* 8px */
  --spacing-md: 1rem;             /* 16px */
  --spacing-lg: 1.5rem;           /* 24px */
  --spacing-xl: 2rem;             /* 32px */
  --spacing-section: 5rem;        /* 80px */
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;    /* 12px */
  --border-radius-xl: 1rem;       /* 16px */
  --transition: all 0.3s ease;
  
  /* Брейкпоинты */
  --breakpoint-mobile: 768px;
  --breakpoint-tablet: 1024px;
}

/* ===== BASE STYLES ===== */
/* Reset and Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-color);
  background: var(--bg-color);
  overflow-x: hidden;
  font-size: var(--font-size-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Typography согласно спецификации */
h1 {
  font-size: var(--font-size-h1);
  font-weight: 900;
  color: var(--text-color);
  line-height: 1.1;
  letter-spacing: -0.025em;
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: 800;
  color: var(--text-color);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

h3 {
  font-size: var(--font-size-h3);
  font-weight: 700;
  color: var(--text-color);
  line-height: 1.3;
}

p {
  font-size: var(--font-size-body);
  color: var(--text-light);
  line-height: 1.6;
}

.section-title {
  font-size: var(--font-size-h2);
  font-weight: 800;
  color: var(--text-color);
  margin-bottom: 1rem;
  text-align: center;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--accent-color);
  transition: var(--transition);
}

/* Utility Classes */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.8s ease forwards;
}

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

/* ===== COMPONENTS ===== */
/* Buttons */
.btn-primary {
  background: var(--gradient-cta);
  color: var(--white);
  padding: var(--spacing-md) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, var(--warning-orange) 0%, var(--vibrant-orange) 100%);
  color: var(--white);
}

.btn-secondary {
  background: transparent;
  color: var(--primary-color);
  padding: 1rem 2rem;
  border: 2px solid var(--primary-color);
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  transition: var(--transition);
  cursor: pointer;
}

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

/* Cards */
.card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--light-gray);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-cards);
}

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

.card:hover::before {
  height: 6px;
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
  filter: drop-shadow(0 4px 8px rgba(0, 102, 255, 0.2));
}

.card-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.card-desc {
  color: var(--text-light);
  line-height: 1.6;
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-lg);
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--dark-blue);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

form input,
form select,
form textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--light-gray);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: var(--white);
}

form input:focus,
form select:focus,
form textarea:focus {
  outline: none;
  border-color: var(--electric-blue);
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
  transform: translateY(-1px);
}

form input::placeholder,
form textarea::placeholder {
  color: var(--medium-gray);
  font-weight: 400;
}

/* Stats */
.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.9rem;
}

/* Metrics */
.metric {
  background: var(--bg-light);
  padding: 1rem;
  border-radius: 10px;
  margin-top: 1rem;
  text-align: center;
}

.metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-color);
  display: block;
}

.metric-label {
  color: var(--text-light);
  font-weight: 500;
  font-size: 0.9rem;
}

/* Demo Screen */
.demo-screen {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(0, 102, 255, 0.1);
}

.screen-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.screen-dots {
  display: flex;
  gap: 0.5rem;
}

.screen-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-color);
}

.screen-title {
  font-weight: 600;
  color: var(--text-color);
}

.dashboard-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: var(--bg-light);
  border-radius: 10px;
  border-left: 4px solid var(--secondary-color);
  transition: var(--transition);
}

.dashboard-item.active {
  background: rgba(16, 185, 129, 0.1);
  border-left-color: var(--success-color);
}

.item-icon {
  font-size: 1.2rem;
}

.item-text {
  font-weight: 500;
  color: var(--text-color);
}

/* ===== LAYOUT ===== */
/* Header */
header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--light-gray);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--electric-blue);
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-cards);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 800;
  font-size: var(--font-size-lg);
  box-shadow: var(--shadow-sm);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--vibrant-orange);
}

.cta-button {
  background: var(--gradient-cta);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

/* Hero Section */
.hero {
  padding: 10rem 0 6rem;
  text-align: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 20%, rgba(0, 102, 255, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-family: var(--font-family);
  font-size: var(--font-size-h1);
  font-weight: 900;
  color: var(--dark-blue);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  color: var(--medium-gray);
  margin-bottom: var(--spacing-xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Sections */
.problem {
  padding: var(--spacing-section) 0;
  background: var(--white);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.problem-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--light-gray);
  text-align: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-cards);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.problem-card:hover::before {
  transform: scaleX(1);
}

.problem-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--electric-blue);
}

.problem-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  display: block;
  filter: drop-shadow(0 4px 8px rgba(0, 102, 255, 0.2));
}

.problem-title {
  font-family: var(--font-family);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--dark-blue);
}

.problem-desc {
  color: var(--medium-gray);
  line-height: 1.6;
  font-size: var(--font-size-base);
}

.solution {
  padding: var(--spacing-section) 0;
  background: var(--bg-light);
}

.solution-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-section);
  align-items: center;
  margin-top: var(--spacing-xl);
}

.solution-feature {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2rem;
}

.feature-icon {
  font-size: 2rem;
  margin-top: 0.25rem;
  filter: drop-shadow(0 2px 4px rgba(0, 102, 255, 0.2));
}

.feature-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.feature-content p {
  color: var(--text-light);
  line-height: 1.6;
}

.solution-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Page-specific animations and interactions */
.fade-in-up {
  animation-delay: 0.2s;
}

.fade-in-up:nth-child(2) {
  animation-delay: 0.4s;
}

.fade-in-up:nth-child(3) {
  animation-delay: 0.6s;
}

/* Scroll animations */
@keyframes slideInFromLeft {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideInFromRight {
  0% {
    transform: translateX(100%);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Interactive elements */
.interactive-demo {
  cursor: pointer;
  transition: all 0.3s ease;
}

.interactive-demo:hover {
  transform: scale(1.02);
}

/* Page-specific overrides and customizations */
.hero .fade-in-up {
  animation-duration: 1s;
  animation-fill-mode: both;
}

.problem-card:hover {
  animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Success states */
.success-message {
  background: var(--success-color);
  color: white;
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-top: 1rem;
  text-align: center;
  animation: slideInFromTop 0.5s ease;
}

@keyframes slideInFromTop {
  0% {
    transform: translateY(-100%);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  h1 {
    font-size: var(--font-size-h1-mobile);
  }
  
  h2, .section-title {
    font-size: var(--font-size-h2-mobile);
  }
  
  .section-subtitle {
    font-size: 1.125rem;
  }
  
  nav {
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
  }
  
  .nav-links {
    gap: var(--spacing-lg);
  }
  
  .hero {
    padding: 8rem 0 4rem;
  }
  
  .hero h1 {
    font-size: var(--font-size-h2);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
  }
  
  .solution-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .problem-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .problem-card {
    padding: var(--spacing-lg);
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 6rem 0 3rem;
  }
  
  .hero h1 {
    font-size: 2.2rem;
    line-height: 1.2;
  }
  
  .hero-subtitle {
    font-size: var(--font-size-sm);
  }
}