/* подключил шрифт inter, он выглядит более современно */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* полностью заменил цветовую палитру на нашу старую */
  --color-primary: #4f46e5; /* индиго */
  --color-primary-dark: #3730a3;
  --color-text: #1f2937; /* почти черный */
  --color-text-light: #f9fafb; /* почти белый */
  --color-background: #f9fafb;
  --color-background-secondary: #ffffff;
  --color-border: #e5e7eb; /* светло-серый */
  --shadow-color: rgba(0, 0, 0, 0.05);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; color: var(--color-text); background-color: var(--color-background); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* --- шапка --- */
.site-header { 
  height: 70px;
  background: var(--color-background-secondary); 
  position: sticky; 
  top: 0; 
  z-index: 100; 
  border-bottom: 1px solid var(--color-border);
}
.site-header .container { 
  height: 100%; 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
}
.logo { 
  font-weight: 700; 
  color: var(--color-primary); 
  text-decoration: none; 
  font-size: 1.5rem; 
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 25px;
}
.main-nav ul { list-style: none; display: flex; gap: 25px; }
.main-nav a { 
  color: var(--color-text); 
  text-decoration: none; 
  font-size: 0.9rem;
  font-weight: 500; 
  transition: color 0.2s; 
}
.main-nav a:hover { color: var(--color-primary); }

.register-btn {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: background-color 0.2s;
}
.register-btn:hover {
  background-color: var(--color-primary-dark);
}

/* ДОБАВИЛ: стили для ссылки "Профиль" */
.profile-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-text);
  text-decoration: none;
}
.profile-link svg {
  color: var(--color-primary);
}
.profile-link:hover {
  color: var(--color-primary);
}

.hamburger, .close-btn { 
  display: none; 
  background: none; 
  border: none; 
  color: var(--color-text); 
  font-size: 2.5rem; 
  cursor: pointer; 
  z-index: 101; 
  line-height: 1;
}

/* --- общие стили для секций --- */
section { padding: 80px 0; } 
.section-title { text-align: center; font-size: 2.2rem; color: var(--color-text); margin-bottom: 15px; font-weight: 700; }
.section-subtitle { text-align: center; color: #6b7280; margin-bottom: 40px; font-size: 1.1rem; }

/* --- ДОБАВИЛ: 1. Стили для Hero-секции --- */
.hero-section {
  background-color: var(--color-background-secondary);
  padding: 100px 0;
  text-align: center;
}
.hero-container {
  max-width: 800px;
}
.hero-container h1 {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 1.2rem;
  color: #4b5563;
  line-height: 1.7;
  margin-bottom: 30px;
}
.hero-btn {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  padding: 14px 28px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: background-color 0.2s, transform 0.2s;
  display: inline-block;
}
.hero-btn:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

/* --- ДОБАВИЛ: 2. Стили для "Как это работает?" --- */
.how-it-works-section {
  background-color: var(--color-background);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}
.step-card {
  text-align: center;
  padding: 20px;
}
.step-icon {
  width: 64px;
  height: 64px;
  background-color: var(--color-background-secondary);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px auto;
  border: 1px solid var(--color-border);
}
.step-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.step-card p {
  color: #4b5563;
  line-height: 1.6;
}

/* --- 3. Секция "О Платформе" (бывшая "О нас") --- */
.about-section { background: var(--color-background-secondary); }
.about-container { display: flex; gap: 30px; align-items: stretch; }
.about-text { 
  flex: 1; 
  padding: 40px;
  background: var(--color-background-secondary);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.about-image { 
  flex-basis: 450px; 
  flex-shrink: 0;
  padding: 0;
  background: none;
  border-radius: 12px;
  border: none;
}
.about-image img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; }
.about-title { text-align: left; margin-bottom: 25px; }
.doma::before, .nauroke::before { content: '✓'; color: var(--color-primary); font-size: 1.2rem; margin-right: 10px; font-weight: 700; }
.final-line { margin-top: 20px; font-weight: 600; }

/* --- ДОБАВИЛ: 4. Стили для "Разделы Платформы" --- */
.platform-sections-section {
  background: var(--color-background);
}
.sections-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.section-card {
  display: block;
  background: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 30px;
  text-decoration: none;
  color: var(--color-text);
  transition: transform 0.2s, box-shadow 0.2s;
}
.section-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px var(--shadow-color);
}
.section-card-icon {
  width: 48px;
  height: 48px;
  background-color: #e0e7ff;
  color: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.section-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.section-card p {
  color: #4b5563;
  line-height: 1.6;
}

/* --- 5. Секция "Начните свой путь" (бывшая "Регистрация") --- */
.register-section {
  background: var(--color-primary);
  color: var(--color-text-light);
}
.register-section .section-title, .register-section .section-subtitle { color: var(--color-text-light); }
.register-form-container { max-width: 500px; margin: 0 auto; background: var(--color-background-secondary); padding: 40px; border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; color: var(--color-text); font-weight: 500; margin-bottom: 8px; }
.form-group input { width: 100%; padding: 12px; border: 1px solid var(--color-border); border-radius: 8px; font-size: 1rem; }
.form-submit-btn { width: 100%; padding: 12px; border: none; border-radius: 8px; background: var(--color-primary); color: var(--color-text-light); font-size: 1rem; font-weight: 600; cursor: pointer; transition: background-color 0.2s; }
.form-submit-btn:hover { background: var(--color-primary-dark); }

/* --- Стили для кнопок соцсетей --- */
.social-login-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: #9ca3af;
  margin: 25px 0;
  font-size: 0.9rem;
}
.social-login-divider::before,
.social-login-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--color-border);
}
.social-login-divider span {
  padding: 0 10px;
}
.social-login-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
}
.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
  color: #4b5563;
  /* ИСПРАВЛЕНО: lобавил font-size для иконок Font Awesome */
  font-size: 1.2rem; /* Размер иконки */
}


.social-btn:hover {
  background-color: #f0f0f0;
  color: var(--color-text);
  border-color: #d1d5db;
}
/*  цвета бренда при наведении */
.social-btn.google:hover { color: #DB4437; }
.social-btn.facebook:hover { color: #4267B2; }
.social-btn.apple:hover { color: #000000; }
.social-btn.telegram:hover { color: #2AABEE; }
.social-btn.discord:hover { color: #5865F2; }

/* --- 6. "Контакты" --- */
.contacts-section { background: var(--color-background); }
.contacts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.contact-item { display: flex; align-items: center; gap: 15px; padding: 20px; background: var(--color-background-secondary); border-radius: 10px; text-decoration: none; color: var(--color-text); font-weight: 500; border: 1px solid var(--color-border); transition: transform 0.2s, box-shadow 0.2s, color 0.2s; }
.contact-item:hover { transform: translateY(-3px); box-shadow: 0 4px 12px var(--shadow-color); color: var(--color-primary); }
.contact-icon { width: 24px; height: 24px; flex-shrink: 0; color: var(--color-primary); transition: color 0.2s; }
.contact-icon svg { width: 100%; height: 100%; }
.map-container { margin-top: 40px; border-radius: 12px; overflow: hidden; border: 1px solid var(--color-border); line-height: 0; }
.map-container iframe { width: 100%; height: 400px; border: 0; }

/* --- Подвал --- */
.site-footer { background: #111827; color: #9ca3af; text-align: center; padding: 40px 20px; font-size: 0.9rem; }
.site-footer p { margin: 5px 0; }

/* --- Навигация-стрелочки --- */
.scroll-nav { position: fixed; top: 50%; right: 30px; transform: translateY(-50%); display: flex; align-items: center; gap: 10px; z-index: 99; opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; }
.scroll-nav.visible { opacity: 1; visibility: visible; }
.scroll-nav__arrows { display: flex; flex-direction: column; gap: 10px; }
.scroll-nav__btn { width: 40px; height: 40px; background: var(--color-background-secondary); border: 1px solid var(--color-border); border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 10px rgba(0,0,0,0.1); transition: background-color 0.2s, transform 0.2s; }
.scroll-nav__btn:hover { background-color: #f0f0f0; transform: scale(1.1); }
.scroll-nav__btn:disabled { opacity: 0.5; cursor: not-allowed; transform: scale(1); }
.scroll-nav__btn svg { width: 20px; height: 20px; color: var(--color-primary); }
.scroll-nav__label { background-color: rgba(25, 36, 50, 0.7); color: var(--color-text-light); padding: 5px 12px; border-radius: 6px; font-size: 0.9rem; font-weight: 500; white-space: nowrap; }

/* --- Адаптивность --- */
@media (max-width: 1024px) {
  .main-nav ul { display: none; } 
  .main-nav .register-btn { display: none; }
  .main-nav .profile-link { display: none; }
  .hamburger { display: block; }

  .hero-container h1 { font-size: 2.5rem; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  
  .about-container { flex-direction: column; gap: 20px; }
  .about-image { width: 100%; max-width: 450px; flex-basis: auto; }
  .about-title { text-align: center; }

  .sections-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; } 
  
  .main-nav.active {
    display: flex; 
    position: fixed; 
    top: 0; 
    right: 0; 
    width: 280px; 
    height: 100vh; 
    background: var(--color-background-secondary); 
    flex-direction: column; 
    padding: 20px;
    padding-top: 80px;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out; 
    align-items: stretch;
    gap: 20px;
    z-index: 102;
    border-left: 1px solid var(--color-border);
  }
  .main-nav.active {
      transform: translateX(0);
  }

  .close-btn {
    display: block;
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 2.5rem;
    font-weight: 300;
    cursor: pointer;
    padding: 0;
    line-height: 1;
  }

  .main-nav.active ul {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
  }
  
  .main-nav.active ul,
  .main-nav.active .register-btn,
  .main-nav.active .profile-link {
    display: flex;
  }

  .main-nav.active a {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    width: 100%;
    padding: 12px 15px;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    border-radius: 10px;
    transition: background-color 0.1s, transform 0.1s;
  }
  
  .main-nav.active a:hover { background-color: var(--color-background); }
  .main-nav.active a:active { background-color: #f0f0f0; transform: scale(0.98); }

  .main-nav.active .register-btn { justify-content: center; background-color: var(--color-primary); color: var(--color-text-light); }
  .main-nav.active .register-btn:active { background-color: var(--color-primary-dark); }
  .main-nav.active .profile-link { justify-content: center; }

  .hamburger { display: block; z-index: 101; }
  
  section { padding: 40px 0; }
  .section-title { font-size: 1.8rem; }
  
  .hero-container h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  
  .steps-grid { grid-template-columns: 1fr; }
  .sections-grid { grid-template-columns: 1fr; }
  
  .scroll-nav__label { display: none; }
  .scroll-nav { right: 15px; }
  
  .nav-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.4); z-index: 99; opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; }
  .nav-overlay.active { opacity: 1; visibility: visible; }
  
  .contacts-grid { grid-template-columns: 1fr; }
}