/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.5rem;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  border-radius: var(--radius-lg);
  min-height: 2.75rem;
  transition:
    background var(--duration-normal) var(--ease-out),
    color var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  color: var(--color-text-inverse);
  background: var(--color-primary);
  box-shadow: var(--shadow-primary);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
}

.btn--secondary {
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
}

.btn--secondary:hover {
  background: var(--color-gray-50);
  border-color: var(--color-gray-300);
}

.btn--ghost {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn--ghost:hover {
  background: var(--color-primary-100);
}

.btn--sm {
  padding: 0.625rem 1rem;
  font-size: var(--text-xs);
}

.btn--lg {
  padding: 1rem 1.75rem;
  font-size: var(--text-base);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition:
    box-shadow var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: var(--space-5);
  border-radius: var(--radius-lg);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.card__title {
  margin-bottom: var(--space-3);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

.card__text {
  color: var(--color-text-secondary);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.badge--popular {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Pricing card */
.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}

.pricing-card:hover {
  box-shadow: var(--shadow-lg);
}

.pricing-card--featured {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card__badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
}

.pricing-card__name {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.pricing-card__price {
  margin: var(--space-4) 0 var(--space-2);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: var(--font-bold);
  letter-spacing: -0.02em;
}

.pricing-card__price span {
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  color: var(--color-text-secondary);
}

.pricing-card__desc {
  margin-bottom: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.pricing-card__features {
  flex: 1;
  margin-bottom: var(--space-8);
}

.pricing-card__features li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding-block: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.pricing-card__features li::before {
  content: '';
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.1rem;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%232563eb'%3E%3Cpath fill-rule='evenodd' d='M16.704 4.153a.75.75 0 01.143 1.052l-8 10.5a.75.75 0 01-1.127.075l-4.5-4.5a.75.75 0 011.06-1.06l3.894 3.893 7.48-9.817a.75.75 0 011.05-.143z'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* Accordion */
.accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.accordion__item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-5) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-align: left;
  background: transparent;
  transition: background var(--duration-normal) var(--ease-out);
}

.accordion__trigger:hover {
  background: var(--color-gray-50);
}

.accordion__icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  transition: transform var(--duration-normal) var(--ease-out);
}

.accordion__item.is-open .accordion__icon {
  transform: rotate(180deg);
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-normal) var(--ease-out);
}

.accordion__item.is-open .accordion__panel {
  grid-template-rows: 1fr;
}

.accordion__content {
  overflow: hidden;
}

.accordion__content-inner {
  padding: 0 var(--space-6) var(--space-5);
  color: var(--color-text-secondary);
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form__label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.form__input {
  width: 100%;
  min-width: 0;
  padding: 0.875rem 1rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  transition:
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out);
}

.form__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form__input.is-error {
  border-color: var(--color-error);
}

.form__error {
  font-size: var(--text-xs);
  color: var(--color-error);
}

.form__success {
  padding: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-success);
  background: var(--color-success-light);
  border-radius: var(--radius-lg);
}

.form__submit-error {
  padding: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-error);
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-lg);
}

.form__honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form__note {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* Messengers (Tabler icons) */
.messengers {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.messengers__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  transition:
    background var(--duration-normal) var(--ease-out),
    color var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.messengers__btn:hover {
  transform: translateY(-2px);
}

.messengers__btn .icon-tabler {
  width: 1.25rem;
  height: 1.25rem;
}

.messengers__btn--telegram:hover {
  color: #fff;
  background: #229ed9;
  border-color: #229ed9;
}

.messengers__btn--whatsapp:hover {
  color: #fff;
  background: #25d366;
  border-color: #25d366;
}

.messengers__btn--vk:hover {
  color: #fff;
  background: #0077ff;
  border-color: #0077ff;
}

.messengers--footer .messengers__btn {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
  color: rgba(248, 250, 252, 0.85);
}

.messengers--footer .messengers__btn--telegram:hover {
  background: #229ed9;
  border-color: #229ed9;
  color: #fff;
}

.messengers--footer .messengers__btn--whatsapp:hover {
  background: #25d366;
  border-color: #25d366;
  color: #fff;
}

.messengers--footer .messengers__btn--vk:hover {
  background: #0077ff;
  border-color: #0077ff;
  color: #fff;
}

.messengers--lg .messengers__btn {
  width: 3rem;
  height: 3rem;
}

.messengers--lg .messengers__btn .icon-tabler {
  width: 1.5rem;
  height: 1.5rem;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--duration-normal) var(--ease-out),
    visibility var(--duration-normal) var(--ease-out);
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox__img {
  max-width: min(100%, 56rem);
  max-height: 90vh;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  object-fit: contain;
}

.lightbox__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  transition: background var(--duration-normal) var(--ease-out);
}

.lightbox__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox__close .icon-tabler {
  width: 1.5rem;
  height: 1.5rem;
}

@media (max-width: 480px) {
  .btn-group {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn-group .btn {
    width: 100%;
  }

  .card,
  .pricing-card {
    padding: var(--space-5);
  }

  .accordion__trigger {
    padding: var(--space-4);
  }

  .accordion__content-inner {
    padding: 0 var(--space-4) var(--space-4);
  }

  .lightbox {
    padding: var(--space-2);
  }
}