.instances-page {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  position: relative;
  z-index: 1;
  overflow-y: auto;
}

.instances-page__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.instances-page__title {
  font-size: 22px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.3px;
}

.instances-page__user {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
  color: var(--text-dim);
}

.instances-page__logout {
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.instances-page__logout:hover {
  color: var(--error);
  border-color: var(--error);
  background: rgba(255, 82, 82, 0.06);
}

.instances-page__body {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 28px;
}

.instances-page__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.instances-page__toolbar h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.3px;
}

.instances-page__add-btn {
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s var(--ease-out);
  letter-spacing: 0.2px;
}

.instances-page__add-btn:hover {
  transform: translateY(-1px);
}

.instances-page__bind-form {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 28px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.instances-page__bind-error {
  width: 100%;
  color: var(--error);
  font-size: 13px;
  margin-bottom: 2px;
}

.instances-page__bind-input {
  flex: 1;
  min-width: 160px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.instances-page__bind-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.12);
}

.instances-page__bind-input::placeholder {
  color: var(--text-muted);
}

.instances-page__bind-btn {
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s var(--ease-out);
}

.instances-page__bind-btn:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.instances-page__bind-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.instances-page__loading,
.instances-page__error {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
  font-size: 15px;
}

.instances-page__empty {
  text-align: center;
  padding: 80px 20px;
}

.instances-page__empty p:first-child {
  font-size: 18px;
  color: var(--text-dim);
  margin: 0 0 4px;
  font-weight: 500;
}

.instances-page__empty-hint {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}

.instances-page__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}

.instance-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  border: 1px solid var(--border);
  cursor: default;
  transition: border-color 0.25s var(--ease-out), transform 0.2s var(--ease-out), box-shadow 0.25s var(--ease-out);
  position: relative;
}

.instance-card--online {
  cursor: pointer;
}

.instance-card--online:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow), 0 0 30px rgba(108, 92, 231, 0.08);
}

.instance-card--offline {
  opacity: 0.45;
}

.instance-card__status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  position: absolute;
  top: 24px;
  right: 24px;
}

.instance-card--online .instance-card__status-dot {
  background: var(--success);
  box-shadow: 0 0 12px rgba(0, 230, 118, 0.35);
}

.instance-card--offline .instance-card__status-dot {
  background: var(--text-muted);
}

.instance-card__name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
  letter-spacing: -0.2px;
}

.instance-card__status {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.instance-card--online .instance-card__status {
  color: var(--success);
}

.instance-card__hint {
  font-size: 12px;
  color: var(--primary-light);
  margin-top: 16px;
  font-weight: 500;
}

.instance-card__hint--disabled {
  color: var(--text-muted);
}

.instance-card__last-seen {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 12px;
}

.instance-card__id {
  font-size: 11px;
  color: var(--text-muted);
  font-family: "SF Mono", "Fira Code", monospace;
  margin-top: 10px;
  opacity: 0.5;
}

@media (max-width: 760px) {
  .instances-page__header {
    padding: max(14px, env(safe-area-inset-top)) 16px 14px;
    gap: 12px;
  }

  .instances-page__title {
    font-size: 20px;
  }

  .instances-page__user {
    min-width: 0;
    gap: 8px;
  }

  .instances-page__user span {
    max-width: 34vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .instances-page__logout,
  .instances-page__add-btn,
  .instances-page__bind-btn {
    min-height: 44px;
  }

  .instances-page__body {
    padding: 26px 16px max(28px, env(safe-area-inset-bottom));
  }

  .instances-page__toolbar {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .instances-page__toolbar h2 {
    font-size: 22px;
  }

  .instances-page__add-btn {
    width: 100%;
  }

  .instances-page__bind-form {
    padding: 18px;
    flex-direction: column;
    align-items: stretch;
  }

  .instances-page__bind-input {
    min-width: 0;
    width: 100%;
    min-height: 48px;
    font-size: 16px;
  }

  .instances-page__grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .instance-card {
    min-height: 128px;
    padding: 24px 20px 20px;
  }
}