@charset "utf-8";
/* CSS Document */
/* ============================================
   DOWNLOAD BUTTON
   ============================================ */

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  background: linear-gradient(135deg, var(--color-cta-bg) 0%, rgba(45, 166, 178, 1) 100%);
  color: var(--color-btn-primary-text);
  border: none;
  padding: var(--space-16) var(--space-32);
  border-radius: var(--radius-base);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.download-btn::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 var(--duration-fast) var(--ease-standard);
}

.download-btn:hover {
  background: linear-gradient(135deg, var(--cta-hover-start) 0%, var(--cta-hover-end) 100%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

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

.download-btn:active {
  transform: translateY(0);
}

.download-btn:focus {
  outline: var(--focus-outline);
  outline-offset: var(--space-4);
}

.download-icon {
  width: 20px;
  height: 20px;
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-5px);
  }
}

.btn-text {
  font-size: var(--font-size-lg);
  letter-spacing: 0.3px;
}

/* ============================================
   MODAL - Уведомление о скачивании
   ============================================ */

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 2000;
  justify-content: center;
  align-items: center;
  animation: fadeIn var(--duration-fast) var(--ease-standard);
}

.modal-overlay.active {
  display: flex;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  text-align: center;
  box-shadow: var(--shadow-lg);
  max-width: 400px;
  animation: slideUp var(--duration-fast) var(--ease-standard);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-cta-bg);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-16);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.modal-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-16);
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--space-16);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-cta-bg), var(--color-primary-hover));
  width: 0%;
  animation: progress 10s ease-out forwards;
  border-radius: var(--radius-full);
}

@keyframes progress {
  0% {
    width: 0%;
  }
  50% {
    width: 60%;
  }
  100% {
    width: 100%;
  }
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  .hero-section {
    padding: var(--space-24) 0;
    margin: var(--space-20) 0;
  }

  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .hero-description {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-16);
  }

  .download-btn {
    flex-direction: column;
    padding: var(--space-12) var(--space-20);
    font-size: var(--font-size-md);
    gap: var(--space-8);
  }

  .btn-text {
    font-size: var(--font-size-md);
  }

  .modal-content {
    margin: var(--space-16);
    padding: var(--space-24);
  }

  .hero-section::before {
    width: 250px;
    height: 250px;
    right: -50px;
    top: -30%;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }

  .download-btn {
    width: 100%;
  }

  .modal-content {
    margin: var(--space-12);
  }
}


/* Screen Reader Only - для поисковиков, невидима пользователям */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
  /* Все равно будет в исходном коде HTML и доступна для ботов */
}

/* При фокусе клавиатурой станет видна (важно для доступности) */
.sr-only:focus {
  position: static;
  width: auto;
  height: auto;
  overflow: visible;
  clip: auto;
  white-space: normal;
  outline: var(--focus-outline);
  padding: var(--space-8);
}