/* Yandex Business UI primitives */

body {
  font-family: var(--g-font-family);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-line);
}

/* Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

.chip--warm {
  background: rgba(255, 214, 10, 0.16);
  color: var(--color-accent);
}

.chip--accent {
  background: rgba(255, 214, 10, 0.16);
  color: var(--color-accent);
}

.chip.is-active {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

/* Tab bar */
.tab-bar {
  display: flex;
  gap: var(--g-spacing-6);
  border-bottom: 1px solid var(--color-line);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-bar__btn {
  position: relative;
  padding: var(--g-spacing-3) 0;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.2s;
}

.tab-bar__btn::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.25s var(--ease-default);
}

.tab-bar__btn.is-active {
  color: var(--color-text);
}

.tab-bar__btn.is-active::after {
  transform: scaleX(1);
}

.tab-panel {
  display: none;
  animation: tabFadeIn 0.35s var(--ease-default);
}

.tab-panel.is-active {
  display: block;
}

@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s, color 0.2s;
}

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

.btn--brand {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn--brand:hover {
  background: var(--color-accent-hover);
  color: var(--color-accent-ink);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-line);
}

.btn--ghost:hover {
  background: var(--g-color-base-generic);
}

.btn--ghost-light {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.btn--ghost-light:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.btn--outline-white {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.btn--outline-white:hover {
  background: rgba(255, 255, 255, 0.12);
}

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

.btn--secondary:hover {
  background: var(--g-color-base-generic-hover);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

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

/* Form fields */
.field {
  margin-bottom: var(--g-spacing-3);
}

.field__label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.field__input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.field__icon {
  position: absolute;
  left: 12px;
  font-size: 16px;
  pointer-events: none;
  opacity: 0.5;
}

.field__input,
.field__select,
.field__textarea {
  width: 100%;
  padding: 12px 14px 12px 40px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  background: var(--color-surface-2);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field__input:focus,
.field__select:focus,
.field__textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(255, 214, 10, 0.18);
}

.field__input--no-icon { padding-left: 14px; }

.field__textarea {
  min-height: 88px;
  resize: vertical;
  padding-top: 12px;
}

.field__input::placeholder,
.field__textarea::placeholder {
  color: var(--color-text-hint);
}

/* YDS-like toggle */
.toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--g-spacing-3);
  padding: var(--g-spacing-2) 0;
  font-size: 14px;
}

.toggle__switch {
  position: relative;
  width: 44px;
  height: 26px;
  flex-shrink: 0;
}

.toggle__switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle__slider {
  position: absolute;
  inset: 0;
  background: #ccc;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.25s;
}

.toggle__slider::before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  bottom: 3px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.25s var(--ease-spring);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.toggle__switch input:checked + .toggle__slider {
  background: var(--color-accent);
}

.toggle__switch input:checked + .toggle__slider::before {
  transform: translateX(18px);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--g-spacing-4);
}

.modal[hidden] { display: none; }

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  animation: fadeIn 0.25s;
}

.modal__dialog {
  position: relative;
  width: min(480px, 100%);
  max-width: 100%;
  min-width: 0;
  max-height: 90dvh;
  overflow-x: hidden;
  overflow-y: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--g-shadow-l);
  padding: var(--g-spacing-6);
  animation: modalSlide 0.35s var(--ease-spring);
  box-sizing: border-box;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--g-spacing-4);
}

.modal__title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.modal__close {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: var(--g-color-base-generic);
  font-size: 20px;
  cursor: pointer;
  display: grid;
  place-items: center;
  line-height: 1;
}

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

@keyframes modalSlide {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Toast */
.toast-stack {
  position: fixed;
  bottom: var(--g-spacing-6);
  left: 50%;
  transform: translateX(-50%);
  z-index: 400;
  display: flex;
  flex-direction: column;
  gap: var(--g-spacing-2);
  pointer-events: none;
}

.toast {
  padding: 12px 20px;
  background: var(--color-surface-2);
  color: var(--color-text);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--g-shadow-m);
  animation: toastIn 0.35s var(--ease-spring);
}

.toast--success { background: var(--color-success); color: #fff; border-color: transparent; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section layout */
.section {
  padding: var(--g-spacing-10) 0;
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.section__title {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--g-spacing-2);
}

.section__lead {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-bottom: var(--g-spacing-6);
}

/* Logo animation */
.logo-s {
  display: block;
  width: 36px;
  height: 36px;
  transform-origin: center center;
}

.logo-s.is-animating {
  animation: logoSpin 1.2s var(--ease-spring);
}

@keyframes logoSpin {
  0% { transform: scaleX(1) rotate(0deg); }
  25% { transform: scaleX(0.55) rotate(0deg); }
  100% { transform: scaleX(1) rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .tab-panel,
  .modal__dialog,
  .modal__backdrop,
  .toast,
  .logo-s.is-animating {
    animation: none;
  }
}