/**
 * button.css
 * БЭМ-блок: button
 * Кнопки с модификаторами (primary, secondary, disabled, loading)
 */

/* ===========================
   Block: button
   =========================== */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-base);
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
}

.button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.3);
}

.button:active {
  transform: translateY(1px);
}

/* ===========================
   Element: icon
   =========================== */

.button__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.button__icon_left {
  margin-right: var(--spacing-xs);
}

.button__icon_right {
  margin-left: var(--spacing-xs);
}

/* ===========================
   Element: text
   =========================== */

.button__text {
  display: inline-block;
}

/* ===========================
   Element: spinner (loading indicator)
   =========================== */

.button__spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-spin 0.8s linear infinite;
}

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

/* ===========================
   Modifier: primary (orange accent)
   =========================== */

.button_primary {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.button_primary:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.button_primary:active {
  background-color: #d14e20;
  border-color: #d14e20;
}

/* ===========================
   Modifier: secondary (outline)
   =========================== */

.button_secondary {
  background-color: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.button_secondary:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.button_secondary:active {
  background-color: var(--color-text);
}

/* ===========================
   Modifier: outline (gray border)
   =========================== */

.button_outline {
  background-color: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.button_outline:hover {
  background-color: var(--color-bg-alt);
  border-color: var(--color-text-muted);
}

.button_outline:active {
  background-color: var(--color-border);
}

/* ===========================
   Modifier: outline-accent
   =========================== */

.button_outline-accent {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.button_outline-accent:hover {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

/* ===========================
   Modifier: ghost (no border)
   =========================== */

.button_ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-accent);
}

.button_ghost:hover {
  background-color: var(--color-bg-alt);
}

.button_ghost:active {
  background-color: var(--color-border);
}

/* ===========================
   Modifier: danger
   =========================== */

.button_danger {
  background-color: var(--color-error);
  border-color: var(--color-error);
  color: var(--color-bg);
}

.button_danger:hover {
  background-color: #c82333;
  border-color: #c82333;
}

/* ===========================
   Modifier: success
   =========================== */

.button_success {
  background-color: var(--color-success);
  border-color: var(--color-success);
  color: var(--color-bg);
}

.button_success:hover {
  background-color: #218838;
  border-color: #218838;
}

/* ===========================
   Modifier: disabled
   =========================== */

.button_disabled,
.button:disabled {
  background-color: var(--color-border);
  border-color: var(--color-border);
  color: var(--color-text-muted);
  cursor: not-allowed;
  pointer-events: none;
}

.button_disabled:hover,
.button:disabled:hover {
  background-color: var(--color-border);
  transform: none;
}

/* ===========================
   Modifier: loading
   =========================== */

.button_loading {
  position: relative;
  pointer-events: none;
}

.button_loading .button__text {
  visibility: hidden;
}

.button_loading .button__icon {
  visibility: hidden;
}

.button_loading .button__spinner {
  display: block;
  position: absolute;
}

/* ===========================
   Modifier: sizes
   =========================== */

.button_sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.button_sm .button__icon {
  width: 16px;
  height: 16px;
}

.button_lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

.button_lg .button__icon {
  width: 24px;
  height: 24px;
}

/* ===========================
   Modifier: full width
   =========================== */

.button_block {
  display: flex;
  width: 100%;
}

/* ===========================
   Modifier: icon only
   =========================== */

.button_icon {
  padding: var(--spacing-sm);
}

.button_icon.button_sm {
  padding: var(--spacing-xs);
}

.button_icon.button_lg {
  padding: var(--spacing-md);
}

/* ===========================
   Modifier: rounded
   =========================== */

.button_rounded {
  border-radius: var(--radius-full);
}

/* ===========================
   Button group
   =========================== */

.button-group {
  display: inline-flex;
  gap: var(--spacing-sm);
}

.button-group_vertical {
  flex-direction: column;
}

.button-group_attached {
  gap: 0;
}

.button-group_attached .button {
  border-radius: 0;
}

.button-group_attached .button:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.button-group_attached .button:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.button-group_attached .button:not(:last-child) {
  border-right-width: 1px;
}

/* ===========================
   Media Queries
   =========================== */

/* Small devices (480px and up) */
@media (min-width: 480px) {
  .button {
    padding: var(--spacing-sm) var(--spacing-xl);
  }

  .button_sm {
    padding: var(--spacing-xs) var(--spacing-md);
  }

  .button_lg {
    padding: var(--spacing-md) var(--spacing-2xl);
  }
}

/* Medium devices (768px and up) */
@media (min-width: 768px) {
  .button {
    padding: var(--spacing-md) var(--spacing-xl);
  }

  .button_lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-xl);
  }

  .button-group_responsive {
    flex-direction: row;
  }
}